diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..1d74e21 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +.vscode/ diff --git a/chapter-04/database.sql b/chapter-04/database.sql new file mode 100644 index 0000000..4331708 --- /dev/null +++ b/chapter-04/database.sql @@ -0,0 +1,19 @@ +CREATE DATABASE IF NOT EXISTS chapter04; + +USE chapter04; + +CREATE TABLE IF NOT EXISTS chapter04.people ( + name VARCHAR(100), + title VARCHAR(10), + description VARCHAR(100), + PRIMARY KEY (name) +); + +DELETE FROM chapter04.people; + +INSERT INTO chapter04.people VALUES ('Gru', 'Felonius', 'Where are the minions?'); +INSERT INTO chapter04.people VALUES ('Nefario', 'Dr.', 'Why ... why are you so old?'); +INSERT INTO chapter04.people VALUES ('Agnes', '', 'Your unicorn is so fluffy!'); +INSERT INTO chapter04.people VALUES ('Edith', '', "Don't touch anything!"); +INSERT INTO chapter04.people VALUES ('Vector', '', 'Committing crimes with both direction and magnitude!'); +INSERT INTO chapter04.people VALUES ('Dave', 'Minion', 'Ngaaahaaa! Patalaki patalaku Big Boss!!'); diff --git a/chapter-04/go/.gitignore b/chapter-04/go/.gitignore new file mode 100644 index 0000000..48b8bf9 --- /dev/null +++ b/chapter-04/go/.gitignore @@ -0,0 +1 @@ +vendor/ diff --git a/chapter-04/go/Gopkg.lock b/chapter-04/go/Gopkg.lock new file mode 100644 index 0000000..c32bcc2 --- /dev/null +++ b/chapter-04/go/Gopkg.lock @@ -0,0 +1,110 @@ +# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'. + + +[[projects]] + branch = "master" + digest = "1:c46fd324e7902268373e1b337436a6377c196e2dbd7b35624c6256d29d494e78" + name = "github.com/codahale/hdrhistogram" + packages = ["."] + pruneopts = "" + revision = "3a0bb77429bd3a61596f5e8a3172445844342120" + +[[projects]] + digest = "1:c07de423ca37dc2765396d6971599ab652a339538084b9b58c9f7fc533b28525" + name = "github.com/go-sql-driver/mysql" + packages = ["."] + pruneopts = "" + revision = "d523deb1b23d913de5bdada721a6071e71283618" + version = "v1.4.0" + +[[projects]] + branch = "master" + digest = "1:de4b7f3ed313c8403ff5e06133ac29e8222931872e0c9f2ac52630000386126a" + name = "github.com/opentracing-contrib/go-stdlib" + packages = ["nethttp"] + pruneopts = "" + revision = "07a764486eb10927e8cf38337918a40d430524ee" + +[[projects]] + digest = "1:78fb99d6011c2ae6c72f3293a83951311147b12b06a5ffa43abf750c4fab6ac5" + name = "github.com/opentracing/opentracing-go" + packages = [ + ".", + "ext", + "log", + ] + pruneopts = "" + revision = "1949ddbfd147afd4d964a9f00b24eb291e0e7c38" + version = "v1.0.2" + +[[projects]] + digest = "1:7365acd48986e205ccb8652cc746f09c8b7876030d53710ea6ef7d0bd0dcd7ca" + name = "github.com/pkg/errors" + packages = ["."] + pruneopts = "" + revision = "645ef00459ed84a119197bfb8d8205042c6df63d" + version = "v0.8.0" + +[[projects]] + digest = "1:acdc8a34ebf61772eed1f00cad6667f37b8f2618bf958eb59d3e28c690703ad8" + name = "github.com/uber/jaeger-client-go" + packages = [ + ".", + "config", + "internal/baggage", + "internal/baggage/remote", + "internal/spanlog", + "internal/throttler", + "internal/throttler/remote", + "log", + "rpcmetrics", + "thrift", + "thrift-gen/agent", + "thrift-gen/baggage", + "thrift-gen/jaeger", + "thrift-gen/sampling", + "thrift-gen/zipkincore", + "utils", + ] + pruneopts = "" + revision = "b043381d944715b469fd6b37addfd30145ca1758" + version = "v2.14.0" + +[[projects]] + digest = "1:aa1598d34009b45ce74fdabdd25e4258d7923d1e1b418d4c98482e79607cb9b0" + name = "github.com/uber/jaeger-lib" + packages = ["metrics"] + pruneopts = "" + revision = "ed3a127ec5fef7ae9ea95b01b542c47fbd999ce5" + version = "v1.5.0" + +[[projects]] + branch = "master" + digest = "1:4f7d853903a2a32b60c99f92492752a52bf9b56425258afbed5cfc2ee86cd216" + name = "golang.org/x/net" + packages = ["context"] + pruneopts = "" + revision = "aaf60122140d3fcf75376d319f0554393160eb50" + +[[projects]] + digest = "1:c1771ca6060335f9768dff6558108bc5ef6c58506821ad43377ee23ff059e472" + name = "google.golang.org/appengine" + packages = ["cloudsql"] + pruneopts = "" + revision = "b1f26356af11148e710935ed1ac8a7f5702c7612" + version = "v1.1.0" + +[solve-meta] + analyzer-name = "dep" + analyzer-version = 1 + input-imports = [ + "github.com/go-sql-driver/mysql", + "github.com/opentracing-contrib/go-stdlib/nethttp", + "github.com/opentracing/opentracing-go", + "github.com/opentracing/opentracing-go/ext", + "github.com/opentracing/opentracing-go/log", + "github.com/uber/jaeger-client-go", + "github.com/uber/jaeger-client-go/config", + ] + solver-name = "gps-cdcl" + solver-version = 1 diff --git a/chapter-04/go/Gopkg.toml b/chapter-04/go/Gopkg.toml new file mode 100644 index 0000000..9cfb4fb --- /dev/null +++ b/chapter-04/go/Gopkg.toml @@ -0,0 +1,11 @@ +[[constraint]] + name = "github.com/uber/jaeger-client-go" + version = "^2.14.0" + +[[constraint]] + name = "github.com/go-sql-driver/mysql" + version = "1.4.0" + +[[constraint]] + name = "github.com/opentracing-contrib/go-stdlib" + branch = "master" diff --git a/chapter-04/go/exercise1/hello.go b/chapter-04/go/exercise1/hello.go new file mode 100644 index 0000000..a81bb2f --- /dev/null +++ b/chapter-04/go/exercise1/hello.go @@ -0,0 +1,57 @@ +package main + +import ( + "log" + "net/http" + "strings" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/exercise1/people" +) + +var repo *people.Repository + +func main() { + repo = people.NewRepository() + defer repo.Close() + + http.HandleFunc("/sayHello/", handleSayHello) + + log.Print("Listening on http://localhost:8080/") + log.Fatal(http.ListenAndServe(":8080", nil)) +} + +func handleSayHello(w http.ResponseWriter, r *http.Request) { + name := strings.TrimPrefix(r.URL.Path, "/sayHello/") + greeting, err := SayHello(name) + if err != nil { + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } + w.Write([]byte(greeting)) +} + +// SayHello creates a greeting for the named person. +func SayHello(name string) (string, error) { + person, err := repo.GetPerson(name) + if err != nil { + return "", err + } + return FormatGreeting( + person.Name, + person.Title, + person.Description, + ), nil +} + +// FormatGreeting combines information about a person into a greeting string. +func FormatGreeting(name, title, description string) string { + response := "Hello, " + if title != "" { + response += title + " " + } + response += name + "!" + if description != "" { + response += " " + description + } + return response +} diff --git a/chapter-04/go/exercise1/people/repository.go b/chapter-04/go/exercise1/people/repository.go new file mode 100644 index 0000000..eeeb817 --- /dev/null +++ b/chapter-04/go/exercise1/people/repository.go @@ -0,0 +1,65 @@ +package people + +import ( + "database/sql" + "log" + + _ "github.com/go-sql-driver/mysql" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/model" +) + +const dburl = "root:mysqlpwd@tcp(127.0.0.1:3306)/chapter04" + +// Repository retrieves information about people. +type Repository struct { + db *sql.DB +} + +// NewRepository creates a new Repository backed by MySQL database. +func NewRepository() *Repository { + db, err := sql.Open("mysql", dburl) + if err != nil { + log.Fatal(err) + } + err = db.Ping() + if err != nil { + log.Fatalf("Cannot ping the db: %v", err) + } + return &Repository{ + db: db, + } +} + +// GetPerson tries to find the person in the database by name. +// If not found, it still returns a Person object with only name +// field populated. +func (r *Repository) GetPerson(name string) (model.Person, error) { + query := "select title, description from people where name = ?" + rows, err := r.db.Query(query, name) + if err != nil { + return model.Person{}, err + } + defer rows.Close() + + for rows.Next() { + var title, descr string + err := rows.Scan(&title, &descr) + if err != nil { + return model.Person{}, err + } + return model.Person{ + Name: name, + Title: title, + Description: descr, + }, nil + } + return model.Person{ + Name: name, + }, nil +} + +// Close calls close on the underlying db connection. +func (r *Repository) Close() { + r.db.Close() +} diff --git a/chapter-04/go/exercise2/hello.go b/chapter-04/go/exercise2/hello.go new file mode 100644 index 0000000..40b41f4 --- /dev/null +++ b/chapter-04/go/exercise2/hello.go @@ -0,0 +1,80 @@ +package main + +import ( + "log" + "net/http" + "strings" + + opentracing "github.com/opentracing/opentracing-go" + otlog "github.com/opentracing/opentracing-go/log" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/exercise2/people" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/tracing" +) + +var repo *people.Repository +var tracer opentracing.Tracer + +func main() { + repo = people.NewRepository() + defer repo.Close() + + tr, closer := tracing.Init("go-2-hello") + defer closer.Close() + tracer = tr + + http.HandleFunc("/sayHello/", handleSayHello) + + log.Print("Listening on http://localhost:8080/") + log.Fatal(http.ListenAndServe(":8080", nil)) +} + +func handleSayHello(w http.ResponseWriter, r *http.Request) { + span := tracer.StartSpan("say-hello") + defer span.Finish() + + name := strings.TrimPrefix(r.URL.Path, "/sayHello/") + greeting, err := SayHello(name, span) + if err != nil { + span.SetTag("error", true) + span.LogFields(otlog.Error(err)) + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } + + span.SetTag("response", greeting) + w.Write([]byte(greeting)) +} + +// SayHello creates a greeting for the named person. +func SayHello(name string, span opentracing.Span) (string, error) { + person, err := repo.GetPerson(name) + if err != nil { + return "", err + } + + span.LogKV( + "name", person.Name, + "title", person.Title, + "description", person.Description, + ) + + return FormatGreeting( + person.Name, + person.Title, + person.Description, + ), nil +} + +// FormatGreeting combines information about a person into a greeting string. +func FormatGreeting(name, title, description string) string { + response := "Hello, " + if title != "" { + response += title + " " + } + response += name + "!" + if description != "" { + response += " " + description + } + return response +} diff --git a/chapter-04/go/exercise2/people/repository.go b/chapter-04/go/exercise2/people/repository.go new file mode 100644 index 0000000..eeeb817 --- /dev/null +++ b/chapter-04/go/exercise2/people/repository.go @@ -0,0 +1,65 @@ +package people + +import ( + "database/sql" + "log" + + _ "github.com/go-sql-driver/mysql" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/model" +) + +const dburl = "root:mysqlpwd@tcp(127.0.0.1:3306)/chapter04" + +// Repository retrieves information about people. +type Repository struct { + db *sql.DB +} + +// NewRepository creates a new Repository backed by MySQL database. +func NewRepository() *Repository { + db, err := sql.Open("mysql", dburl) + if err != nil { + log.Fatal(err) + } + err = db.Ping() + if err != nil { + log.Fatalf("Cannot ping the db: %v", err) + } + return &Repository{ + db: db, + } +} + +// GetPerson tries to find the person in the database by name. +// If not found, it still returns a Person object with only name +// field populated. +func (r *Repository) GetPerson(name string) (model.Person, error) { + query := "select title, description from people where name = ?" + rows, err := r.db.Query(query, name) + if err != nil { + return model.Person{}, err + } + defer rows.Close() + + for rows.Next() { + var title, descr string + err := rows.Scan(&title, &descr) + if err != nil { + return model.Person{}, err + } + return model.Person{ + Name: name, + Title: title, + Description: descr, + }, nil + } + return model.Person{ + Name: name, + }, nil +} + +// Close calls close on the underlying db connection. +func (r *Repository) Close() { + r.db.Close() +} diff --git a/chapter-04/go/exercise3a/hello.go b/chapter-04/go/exercise3a/hello.go new file mode 100644 index 0000000..64519cf --- /dev/null +++ b/chapter-04/go/exercise3a/hello.go @@ -0,0 +1,89 @@ +package main + +import ( + "log" + "net/http" + "strings" + + opentracing "github.com/opentracing/opentracing-go" + otlog "github.com/opentracing/opentracing-go/log" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/exercise3a/people" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/tracing" +) + +var repo *people.Repository + +func main() { + tracer, closer := tracing.Init("go-3-hello") + defer closer.Close() + opentracing.SetGlobalTracer(tracer) + + repo = people.NewRepository() + defer repo.Close() + + http.HandleFunc("/sayHello/", handleSayHello) + + log.Print("Listening on http://localhost:8080/") + log.Fatal(http.ListenAndServe(":8080", nil)) +} + +func handleSayHello(w http.ResponseWriter, r *http.Request) { + span := opentracing.GlobalTracer().StartSpan("say-hello") + defer span.Finish() + + name := strings.TrimPrefix(r.URL.Path, "/sayHello/") + greeting, err := SayHello(name, span) + if err != nil { + span.SetTag("error", true) + span.LogFields(otlog.Error(err)) + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } + + span.SetTag("response", greeting) + w.Write([]byte(greeting)) +} + +// SayHello creates a greeting for the named person. +func SayHello(name string, span opentracing.Span) (string, error) { + person, err := repo.GetPerson(name, span) + if err != nil { + return "", err + } + + span.LogKV( + "name", person.Name, + "title", person.Title, + "description", person.Description, + ) + + return FormatGreeting( + person.Name, + person.Title, + person.Description, + span, + ), nil +} + +// FormatGreeting combines information about a person into a greeting string. +func FormatGreeting( + name, title, description string, + span opentracing.Span, +) string { + span = opentracing.GlobalTracer().StartSpan( + "format-greeting", + opentracing.ChildOf(span.Context()), + ) + defer span.Finish() + + response := "Hello, " + if title != "" { + response += title + " " + } + response += name + "!" + if description != "" { + response += " " + description + } + return response +} diff --git a/chapter-04/go/exercise3a/people/repository.go b/chapter-04/go/exercise3a/people/repository.go new file mode 100644 index 0000000..96c6e97 --- /dev/null +++ b/chapter-04/go/exercise3a/people/repository.go @@ -0,0 +1,77 @@ +package people + +import ( + "database/sql" + "log" + + _ "github.com/go-sql-driver/mysql" + opentracing "github.com/opentracing/opentracing-go" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/model" +) + +const dburl = "root:mysqlpwd@tcp(127.0.0.1:3306)/chapter04" + +// Repository retrieves information about people. +type Repository struct { + db *sql.DB +} + +// NewRepository creates a new Repository backed by MySQL database. +func NewRepository() *Repository { + db, err := sql.Open("mysql", dburl) + if err != nil { + log.Fatal(err) + } + err = db.Ping() + if err != nil { + log.Fatalf("Cannot ping the db: %v", err) + } + return &Repository{ + db: db, + } +} + +// GetPerson tries to find the person in the database by name. +// If not found, it still returns a Person object with only name +// field populated. +func (r *Repository) GetPerson( + name string, + span opentracing.Span, +) (model.Person, error) { + query := "select title, description from people where name = ?" + + span = opentracing.GlobalTracer().StartSpan( + "get-person", + opentracing.ChildOf(span.Context()), + opentracing.Tag{Key: "db.statement", Value: query}, + ) + defer span.Finish() + + rows, err := r.db.Query(query, name) + if err != nil { + return model.Person{}, err + } + defer rows.Close() + + for rows.Next() { + var title, descr string + err := rows.Scan(&title, &descr) + if err != nil { + return model.Person{}, err + } + return model.Person{ + Name: name, + Title: title, + Description: descr, + }, nil + } + return model.Person{ + Name: name, + }, nil +} + +// Close calls close on the underlying db connection. +func (r *Repository) Close() { + r.db.Close() +} diff --git a/chapter-04/go/exercise3b/hello.go b/chapter-04/go/exercise3b/hello.go new file mode 100644 index 0000000..5ce23ab --- /dev/null +++ b/chapter-04/go/exercise3b/hello.go @@ -0,0 +1,91 @@ +package main + +import ( + "context" + "log" + "net/http" + "strings" + + opentracing "github.com/opentracing/opentracing-go" + otlog "github.com/opentracing/opentracing-go/log" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/exercise3b/people" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/tracing" +) + +var repo *people.Repository + +func main() { + tracer, closer := tracing.Init("go-3-hello") + defer closer.Close() + opentracing.SetGlobalTracer(tracer) + + repo = people.NewRepository() + defer repo.Close() + + http.HandleFunc("/sayHello/", handleSayHello) + + log.Print("Listening on http://localhost:8080/") + log.Fatal(http.ListenAndServe(":8080", nil)) +} + +func handleSayHello(w http.ResponseWriter, r *http.Request) { + span := opentracing.GlobalTracer().StartSpan("say-hello") + defer span.Finish() + ctx := opentracing.ContextWithSpan(r.Context(), span) + + name := strings.TrimPrefix(r.URL.Path, "/sayHello/") + greeting, err := SayHello(ctx, name) + if err != nil { + span.SetTag("error", true) + span.LogFields(otlog.Error(err)) + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } + + span.SetTag("response", greeting) + w.Write([]byte(greeting)) +} + +// SayHello creates a greeting for the named person. +func SayHello(ctx context.Context, name string) (string, error) { + person, err := repo.GetPerson(ctx, name) + if err != nil { + return "", err + } + + opentracing.SpanFromContext(ctx).LogKV( + "name", person.Name, + "title", person.Title, + "description", person.Description, + ) + + return FormatGreeting( + ctx, + person.Name, + person.Title, + person.Description, + ), nil +} + +// FormatGreeting combines information about a person into a greeting string. +func FormatGreeting( + ctx context.Context, + name, title, description string, +) string { + span, ctx := opentracing.StartSpanFromContext( + ctx, + "format-greeting", + ) + defer span.Finish() + + response := "Hello, " + if title != "" { + response += title + " " + } + response += name + "!" + if description != "" { + response += " " + description + } + return response +} diff --git a/chapter-04/go/exercise3b/people/repository.go b/chapter-04/go/exercise3b/people/repository.go new file mode 100644 index 0000000..948f8cf --- /dev/null +++ b/chapter-04/go/exercise3b/people/repository.go @@ -0,0 +1,78 @@ +package people + +import ( + "context" + "database/sql" + "log" + + _ "github.com/go-sql-driver/mysql" + opentracing "github.com/opentracing/opentracing-go" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/model" +) + +const dburl = "root:mysqlpwd@tcp(127.0.0.1:3306)/chapter04" + +// Repository retrieves information about people. +type Repository struct { + db *sql.DB +} + +// NewRepository creates a new Repository backed by MySQL database. +func NewRepository() *Repository { + db, err := sql.Open("mysql", dburl) + if err != nil { + log.Fatal(err) + } + err = db.Ping() + if err != nil { + log.Fatalf("Cannot ping the db: %v", err) + } + return &Repository{ + db: db, + } +} + +// GetPerson tries to find the person in the database by name. +// If not found, it still returns a Person object with only name +// field populated. +func (r *Repository) GetPerson( + ctx context.Context, + name string, +) (model.Person, error) { + query := "select title, description from people where name = ?" + + span, ctx := opentracing.StartSpanFromContext( + ctx, + "get-person", + opentracing.Tag{Key: "db.statement", Value: query}, + ) + defer span.Finish() + + rows, err := r.db.QueryContext(ctx, query, name) + if err != nil { + return model.Person{}, err + } + defer rows.Close() + + for rows.Next() { + var title, descr string + err := rows.Scan(&title, &descr) + if err != nil { + return model.Person{}, err + } + return model.Person{ + Name: name, + Title: title, + Description: descr, + }, nil + } + return model.Person{ + Name: name, + }, nil +} + +// Close calls close on the underlying db connection. +func (r *Repository) Close() { + r.db.Close() +} diff --git a/chapter-04/go/exercise4a/bigbrother/main.go b/chapter-04/go/exercise4a/bigbrother/main.go new file mode 100644 index 0000000..4c719b5 --- /dev/null +++ b/chapter-04/go/exercise4a/bigbrother/main.go @@ -0,0 +1,54 @@ +package main + +import ( + "encoding/json" + "log" + "net/http" + "strings" + + opentracing "github.com/opentracing/opentracing-go" + otlog "github.com/opentracing/opentracing-go/log" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/exercise4a/people" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/tracing" +) + +var repo *people.Repository + +func main() { + tracer, closer := tracing.Init("go-4-bigbrother") + defer closer.Close() + opentracing.SetGlobalTracer(tracer) + + repo = people.NewRepository() + defer repo.Close() + + http.HandleFunc("/getPerson/", handleGetPerson) + + log.Print("Listening on http://localhost:8081/") + log.Fatal(http.ListenAndServe(":8081", nil)) +} + +func handleGetPerson(w http.ResponseWriter, r *http.Request) { + span := opentracing.GlobalTracer().StartSpan("/getPerson") + defer span.Finish() + ctx := opentracing.ContextWithSpan(r.Context(), span) + + name := strings.TrimPrefix(r.URL.Path, "/getPerson/") + person, err := repo.GetPerson(ctx, name) + if err != nil { + span.SetTag("error", true) + span.LogFields(otlog.Error(err)) + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } + + span.LogKV( + "name", person.Name, + "title", person.Title, + "description", person.Description, + ) + + bytes, _ := json.Marshal(person) + w.Write(bytes) +} diff --git a/chapter-04/go/exercise4a/formatter/main.go b/chapter-04/go/exercise4a/formatter/main.go new file mode 100644 index 0000000..9032c1e --- /dev/null +++ b/chapter-04/go/exercise4a/formatter/main.go @@ -0,0 +1,57 @@ +package main + +import ( + "context" + "log" + "net/http" + + opentracing "github.com/opentracing/opentracing-go" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/tracing" +) + +func main() { + tracer, closer := tracing.Init("go-4-formatter") + defer closer.Close() + opentracing.SetGlobalTracer(tracer) + + http.HandleFunc("/formatGreeting", handleFormatGreeting) + + log.Print("Listening on http://localhost:8082/") + log.Fatal(http.ListenAndServe(":8082", nil)) +} + +func handleFormatGreeting(w http.ResponseWriter, r *http.Request) { + span := opentracing.GlobalTracer().StartSpan("/formatGreeting") + defer span.Finish() + ctx := opentracing.ContextWithSpan(r.Context(), span) + + name := r.FormValue("name") + title := r.FormValue("title") + descr := r.FormValue("description") + + greeting := FormatGreeting(ctx, name, title, descr) + w.Write([]byte(greeting)) +} + +// FormatGreeting combines information about a person into a greeting string. +func FormatGreeting( + ctx context.Context, + name, title, description string, +) string { + span, ctx := opentracing.StartSpanFromContext( + ctx, + "format-greeting", + ) + defer span.Finish() + + response := "Hello, " + if title != "" { + response += title + " " + } + response += name + "!" + if description != "" { + response += " " + description + } + return response +} diff --git a/chapter-04/go/exercise4a/hello.go b/chapter-04/go/exercise4a/hello.go new file mode 100644 index 0000000..99456d4 --- /dev/null +++ b/chapter-04/go/exercise4a/hello.go @@ -0,0 +1,81 @@ +package main + +import ( + "context" + "encoding/json" + "log" + "net/http" + "net/url" + "strings" + + opentracing "github.com/opentracing/opentracing-go" + otlog "github.com/opentracing/opentracing-go/log" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/http" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/model" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/tracing" +) + +func main() { + tracer, closer := tracing.Init("go-4-hello") + defer closer.Close() + opentracing.SetGlobalTracer(tracer) + + http.HandleFunc("/sayHello/", handleSayHello) + + log.Print("Listening on http://localhost:8080/") + log.Fatal(http.ListenAndServe(":8080", nil)) +} + +func handleSayHello(w http.ResponseWriter, r *http.Request) { + span := opentracing.GlobalTracer().StartSpan("say-hello") + defer span.Finish() + ctx := opentracing.ContextWithSpan(r.Context(), span) + + name := strings.TrimPrefix(r.URL.Path, "/sayHello/") + greeting, err := SayHello(ctx, name) + if err != nil { + span.SetTag("error", true) + span.LogFields(otlog.Error(err)) + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } + + span.SetTag("response", greeting) + w.Write([]byte(greeting)) +} + +// SayHello creates a greeting for the named person. +func SayHello(ctx context.Context, name string) (string, error) { + person, err := getPerson(ctx, name) + if err != nil { + return "", err + } + + return formatGreeting(ctx, person) +} + +func getPerson(ctx context.Context, name string) (*model.Person, error) { + res, err := xhttp.Get("http://localhost:8081/getPerson/" + name) + if err != nil { + return nil, err + } + var person model.Person + if err := json.Unmarshal(res, &person); err != nil { + return nil, err + } + return &person, nil +} + +func formatGreeting(ctx context.Context, person *model.Person) (string, error) { + v := url.Values{} + v.Set("name", person.Name) + v.Set("title", person.Title) + v.Set("description", person.Description) + url := "http://localhost:8082/formatGreeting?" + v.Encode() + res, err := xhttp.Get(url) + if err != nil { + return "", err + } + return string(res), nil +} diff --git a/chapter-04/go/exercise4a/people/repository.go b/chapter-04/go/exercise4a/people/repository.go new file mode 100644 index 0000000..948f8cf --- /dev/null +++ b/chapter-04/go/exercise4a/people/repository.go @@ -0,0 +1,78 @@ +package people + +import ( + "context" + "database/sql" + "log" + + _ "github.com/go-sql-driver/mysql" + opentracing "github.com/opentracing/opentracing-go" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/model" +) + +const dburl = "root:mysqlpwd@tcp(127.0.0.1:3306)/chapter04" + +// Repository retrieves information about people. +type Repository struct { + db *sql.DB +} + +// NewRepository creates a new Repository backed by MySQL database. +func NewRepository() *Repository { + db, err := sql.Open("mysql", dburl) + if err != nil { + log.Fatal(err) + } + err = db.Ping() + if err != nil { + log.Fatalf("Cannot ping the db: %v", err) + } + return &Repository{ + db: db, + } +} + +// GetPerson tries to find the person in the database by name. +// If not found, it still returns a Person object with only name +// field populated. +func (r *Repository) GetPerson( + ctx context.Context, + name string, +) (model.Person, error) { + query := "select title, description from people where name = ?" + + span, ctx := opentracing.StartSpanFromContext( + ctx, + "get-person", + opentracing.Tag{Key: "db.statement", Value: query}, + ) + defer span.Finish() + + rows, err := r.db.QueryContext(ctx, query, name) + if err != nil { + return model.Person{}, err + } + defer rows.Close() + + for rows.Next() { + var title, descr string + err := rows.Scan(&title, &descr) + if err != nil { + return model.Person{}, err + } + return model.Person{ + Name: name, + Title: title, + Description: descr, + }, nil + } + return model.Person{ + Name: name, + }, nil +} + +// Close calls close on the underlying db connection. +func (r *Repository) Close() { + r.db.Close() +} diff --git a/chapter-04/go/exercise4b/bigbrother/main.go b/chapter-04/go/exercise4b/bigbrother/main.go new file mode 100644 index 0000000..4cc658c --- /dev/null +++ b/chapter-04/go/exercise4b/bigbrother/main.go @@ -0,0 +1,62 @@ +package main + +import ( + "encoding/json" + "log" + "net/http" + "strings" + + opentracing "github.com/opentracing/opentracing-go" + otlog "github.com/opentracing/opentracing-go/log" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/exercise4b/people" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/tracing" +) + +var repo *people.Repository + +func main() { + tracer, closer := tracing.Init("go-4-bigbrother") + defer closer.Close() + opentracing.SetGlobalTracer(tracer) + + repo = people.NewRepository() + defer repo.Close() + + http.HandleFunc("/getPerson/", handleGetPerson) + + log.Print("Listening on http://localhost:8081/") + log.Fatal(http.ListenAndServe(":8081", nil)) +} + +func handleGetPerson(w http.ResponseWriter, r *http.Request) { + spanCtx, _ := opentracing.GlobalTracer().Extract( + opentracing.HTTPHeaders, + opentracing.HTTPHeadersCarrier(r.Header), + ) + span := opentracing.GlobalTracer().StartSpan( + "/getPerson", + opentracing.ChildOf(spanCtx), + ) + defer span.Finish() + + ctx := opentracing.ContextWithSpan(r.Context(), span) + + name := strings.TrimPrefix(r.URL.Path, "/getPerson/") + person, err := repo.GetPerson(ctx, name) + if err != nil { + span.SetTag("error", true) + span.LogFields(otlog.Error(err)) + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } + + span.LogKV( + "name", person.Name, + "title", person.Title, + "description", person.Description, + ) + + bytes, _ := json.Marshal(person) + w.Write(bytes) +} diff --git a/chapter-04/go/exercise4b/formatter/main.go b/chapter-04/go/exercise4b/formatter/main.go new file mode 100644 index 0000000..468cb07 --- /dev/null +++ b/chapter-04/go/exercise4b/formatter/main.go @@ -0,0 +1,66 @@ +package main + +import ( + "context" + "log" + "net/http" + + opentracing "github.com/opentracing/opentracing-go" + ottag "github.com/opentracing/opentracing-go/ext" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/tracing" +) + +func main() { + tracer, closer := tracing.Init("go-4-formatter") + defer closer.Close() + opentracing.SetGlobalTracer(tracer) + + http.HandleFunc("/formatGreeting", handleFormatGreeting) + + log.Print("Listening on http://localhost:8082/") + log.Fatal(http.ListenAndServe(":8082", nil)) +} + +func handleFormatGreeting(w http.ResponseWriter, r *http.Request) { + spanCtx, _ := opentracing.GlobalTracer().Extract( + opentracing.HTTPHeaders, + opentracing.HTTPHeadersCarrier(r.Header), + ) + span := opentracing.GlobalTracer().StartSpan( + "/formatGreeting", + ottag.RPCServerOption(spanCtx), + ) + defer span.Finish() + + ctx := opentracing.ContextWithSpan(r.Context(), span) + + name := r.FormValue("name") + title := r.FormValue("title") + descr := r.FormValue("description") + + greeting := FormatGreeting(ctx, name, title, descr) + w.Write([]byte(greeting)) +} + +// FormatGreeting combines information about a person into a greeting string. +func FormatGreeting( + ctx context.Context, + name, title, description string, +) string { + span, ctx := opentracing.StartSpanFromContext( + ctx, + "format-greeting", + ) + defer span.Finish() + + response := "Hello, " + if title != "" { + response += title + " " + } + response += name + "!" + if description != "" { + response += " " + description + } + return response +} diff --git a/chapter-04/go/exercise4b/hello.go b/chapter-04/go/exercise4b/hello.go new file mode 100644 index 0000000..82d3e0c --- /dev/null +++ b/chapter-04/go/exercise4b/hello.go @@ -0,0 +1,115 @@ +package main + +import ( + "context" + "encoding/json" + "log" + "net/http" + "net/url" + "strings" + + opentracing "github.com/opentracing/opentracing-go" + ottag "github.com/opentracing/opentracing-go/ext" + otlog "github.com/opentracing/opentracing-go/log" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/http" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/model" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/tracing" +) + +func main() { + tracer, closer := tracing.Init("go-4-hello") + defer closer.Close() + opentracing.SetGlobalTracer(tracer) + + http.HandleFunc("/sayHello/", handleSayHello) + + log.Print("Listening on http://localhost:8080/") + log.Fatal(http.ListenAndServe(":8080", nil)) +} + +func handleSayHello(w http.ResponseWriter, r *http.Request) { + spanCtx, _ := opentracing.GlobalTracer().Extract( + opentracing.HTTPHeaders, + opentracing.HTTPHeadersCarrier(r.Header), + ) + span := opentracing.GlobalTracer().StartSpan( + "say-hello", + ottag.RPCServerOption(spanCtx), + ) + defer span.Finish() + ctx := opentracing.ContextWithSpan(r.Context(), span) + + name := strings.TrimPrefix(r.URL.Path, "/sayHello/") + greeting, err := SayHello(ctx, name) + if err != nil { + span.SetTag("error", true) + span.LogFields(otlog.Error(err)) + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } + + span.SetTag("response", greeting) + w.Write([]byte(greeting)) +} + +// SayHello creates a greeting for the named person. +func SayHello(ctx context.Context, name string) (string, error) { + person, err := getPerson(ctx, name) + if err != nil { + return "", err + } + + return formatGreeting(ctx, person) +} + +func getPerson(ctx context.Context, name string) (*model.Person, error) { + url := "http://localhost:8081/getPerson/" + name + res, err := get(ctx, "getPerson", url) + if err != nil { + return nil, err + } + + var person model.Person + if err := json.Unmarshal(res, &person); err != nil { + return nil, err + } + return &person, nil +} + +func formatGreeting( + ctx context.Context, + person *model.Person, +) (string, error) { + v := url.Values{} + v.Set("name", person.Name) + v.Set("title", person.Title) + v.Set("description", person.Description) + url := "http://localhost:8082/formatGreeting?" + v.Encode() + res, err := get(ctx, "formatGreeting", url) + if err != nil { + return "", err + } + return string(res), nil +} + +func get(ctx context.Context, operationName, url string) ([]byte, error) { + req, err := http.NewRequest("GET", url, nil) + if err != nil { + return nil, err + } + + span, ctx := opentracing.StartSpanFromContext(ctx, operationName) + defer span.Finish() + + ottag.SpanKindRPCClient.Set(span) + ottag.HTTPUrl.Set(span, url) + ottag.HTTPMethod.Set(span, "GET") + opentracing.GlobalTracer().Inject( + span.Context(), + opentracing.HTTPHeaders, + opentracing.HTTPHeadersCarrier(req.Header), + ) + + return xhttp.Do(req) +} diff --git a/chapter-04/go/exercise4b/people/repository.go b/chapter-04/go/exercise4b/people/repository.go new file mode 100644 index 0000000..948f8cf --- /dev/null +++ b/chapter-04/go/exercise4b/people/repository.go @@ -0,0 +1,78 @@ +package people + +import ( + "context" + "database/sql" + "log" + + _ "github.com/go-sql-driver/mysql" + opentracing "github.com/opentracing/opentracing-go" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/model" +) + +const dburl = "root:mysqlpwd@tcp(127.0.0.1:3306)/chapter04" + +// Repository retrieves information about people. +type Repository struct { + db *sql.DB +} + +// NewRepository creates a new Repository backed by MySQL database. +func NewRepository() *Repository { + db, err := sql.Open("mysql", dburl) + if err != nil { + log.Fatal(err) + } + err = db.Ping() + if err != nil { + log.Fatalf("Cannot ping the db: %v", err) + } + return &Repository{ + db: db, + } +} + +// GetPerson tries to find the person in the database by name. +// If not found, it still returns a Person object with only name +// field populated. +func (r *Repository) GetPerson( + ctx context.Context, + name string, +) (model.Person, error) { + query := "select title, description from people where name = ?" + + span, ctx := opentracing.StartSpanFromContext( + ctx, + "get-person", + opentracing.Tag{Key: "db.statement", Value: query}, + ) + defer span.Finish() + + rows, err := r.db.QueryContext(ctx, query, name) + if err != nil { + return model.Person{}, err + } + defer rows.Close() + + for rows.Next() { + var title, descr string + err := rows.Scan(&title, &descr) + if err != nil { + return model.Person{}, err + } + return model.Person{ + Name: name, + Title: title, + Description: descr, + }, nil + } + return model.Person{ + Name: name, + }, nil +} + +// Close calls close on the underlying db connection. +func (r *Repository) Close() { + r.db.Close() +} diff --git a/chapter-04/go/exercise5/bigbrother/main.go b/chapter-04/go/exercise5/bigbrother/main.go new file mode 100644 index 0000000..53658c9 --- /dev/null +++ b/chapter-04/go/exercise5/bigbrother/main.go @@ -0,0 +1,62 @@ +package main + +import ( + "encoding/json" + "log" + "net/http" + "strings" + + opentracing "github.com/opentracing/opentracing-go" + otlog "github.com/opentracing/opentracing-go/log" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/exercise5/people" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/tracing" +) + +var repo *people.Repository + +func main() { + tracer, closer := tracing.Init("go-5-bigbrother") + defer closer.Close() + opentracing.SetGlobalTracer(tracer) + + repo = people.NewRepository() + defer repo.Close() + + http.HandleFunc("/getPerson/", handleGetPerson) + + log.Print("Listening on http://localhost:8081/") + log.Fatal(http.ListenAndServe(":8081", nil)) +} + +func handleGetPerson(w http.ResponseWriter, r *http.Request) { + spanCtx, _ := opentracing.GlobalTracer().Extract( + opentracing.HTTPHeaders, + opentracing.HTTPHeadersCarrier(r.Header), + ) + span := opentracing.GlobalTracer().StartSpan( + "/getPerson", + opentracing.ChildOf(spanCtx), + ) + defer span.Finish() + + ctx := opentracing.ContextWithSpan(r.Context(), span) + + name := strings.TrimPrefix(r.URL.Path, "/getPerson/") + person, err := repo.GetPerson(ctx, name) + if err != nil { + span.SetTag("error", true) + span.LogFields(otlog.Error(err)) + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } + + span.LogKV( + "name", person.Name, + "title", person.Title, + "description", person.Description, + ) + + bytes, _ := json.Marshal(person) + w.Write(bytes) +} diff --git a/chapter-04/go/exercise5/formatter/main.go b/chapter-04/go/exercise5/formatter/main.go new file mode 100644 index 0000000..3dc7156 --- /dev/null +++ b/chapter-04/go/exercise5/formatter/main.go @@ -0,0 +1,70 @@ +package main + +import ( + "context" + "log" + "net/http" + + opentracing "github.com/opentracing/opentracing-go" + ottag "github.com/opentracing/opentracing-go/ext" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/tracing" +) + +func main() { + tracer, closer := tracing.Init("go-5-formatter") + defer closer.Close() + opentracing.SetGlobalTracer(tracer) + + http.HandleFunc("/formatGreeting", handleFormatGreeting) + + log.Print("Listening on http://localhost:8082/") + log.Fatal(http.ListenAndServe(":8082", nil)) +} + +func handleFormatGreeting(w http.ResponseWriter, r *http.Request) { + spanCtx, _ := opentracing.GlobalTracer().Extract( + opentracing.HTTPHeaders, + opentracing.HTTPHeadersCarrier(r.Header), + ) + span := opentracing.GlobalTracer().StartSpan( + "/formatGreeting", + ottag.RPCServerOption(spanCtx), + ) + defer span.Finish() + + ctx := opentracing.ContextWithSpan(r.Context(), span) + + name := r.FormValue("name") + title := r.FormValue("title") + descr := r.FormValue("description") + + greeting := FormatGreeting(ctx, name, title, descr) + w.Write([]byte(greeting)) +} + +// FormatGreeting combines information about a person into a greeting string. +func FormatGreeting( + ctx context.Context, + name, title, description string, +) string { + span, ctx := opentracing.StartSpanFromContext( + ctx, + "format-greeting", + ) + defer span.Finish() + + greeting := span.BaggageItem("greeting") + if greeting == "" { + greeting = "Hello" + } + response := greeting + ", " + if title != "" { + response += title + " " + } + response += name + "!" + if description != "" { + response += " " + description + } + return response +} diff --git a/chapter-04/go/exercise5/hello.go b/chapter-04/go/exercise5/hello.go new file mode 100644 index 0000000..941e5f6 --- /dev/null +++ b/chapter-04/go/exercise5/hello.go @@ -0,0 +1,115 @@ +package main + +import ( + "context" + "encoding/json" + "log" + "net/http" + "net/url" + "strings" + + opentracing "github.com/opentracing/opentracing-go" + ottag "github.com/opentracing/opentracing-go/ext" + otlog "github.com/opentracing/opentracing-go/log" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/http" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/model" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/tracing" +) + +func main() { + tracer, closer := tracing.Init("go-5-hello") + defer closer.Close() + opentracing.SetGlobalTracer(tracer) + + http.HandleFunc("/sayHello/", handleSayHello) + + log.Print("Listening on http://localhost:8080/") + log.Fatal(http.ListenAndServe(":8080", nil)) +} + +func handleSayHello(w http.ResponseWriter, r *http.Request) { + spanCtx, _ := opentracing.GlobalTracer().Extract( + opentracing.HTTPHeaders, + opentracing.HTTPHeadersCarrier(r.Header), + ) + span := opentracing.GlobalTracer().StartSpan( + "say-hello", + ottag.RPCServerOption(spanCtx), + ) + defer span.Finish() + ctx := opentracing.ContextWithSpan(r.Context(), span) + + name := strings.TrimPrefix(r.URL.Path, "/sayHello/") + greeting, err := SayHello(ctx, name) + if err != nil { + span.SetTag("error", true) + span.LogFields(otlog.Error(err)) + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } + + span.SetTag("response", greeting) + w.Write([]byte(greeting)) +} + +// SayHello creates a greeting for the named person. +func SayHello(ctx context.Context, name string) (string, error) { + person, err := getPerson(ctx, name) + if err != nil { + return "", err + } + + return formatGreeting(ctx, person) +} + +func getPerson(ctx context.Context, name string) (*model.Person, error) { + url := "http://localhost:8081/getPerson/" + name + res, err := get(ctx, "getPerson", url) + if err != nil { + return nil, err + } + + var person model.Person + if err := json.Unmarshal(res, &person); err != nil { + return nil, err + } + return &person, nil +} + +func formatGreeting( + ctx context.Context, + person *model.Person, +) (string, error) { + v := url.Values{} + v.Set("name", person.Name) + v.Set("title", person.Title) + v.Set("description", person.Description) + url := "http://localhost:8082/formatGreeting?" + v.Encode() + res, err := get(ctx, "formatGreeting", url) + if err != nil { + return "", err + } + return string(res), nil +} + +func get(ctx context.Context, operationName, url string) ([]byte, error) { + req, err := http.NewRequest("GET", url, nil) + if err != nil { + return nil, err + } + + span, ctx := opentracing.StartSpanFromContext(ctx, operationName) + defer span.Finish() + + ottag.SpanKindRPCClient.Set(span) + ottag.HTTPUrl.Set(span, url) + ottag.HTTPMethod.Set(span, "GET") + opentracing.GlobalTracer().Inject( + span.Context(), + opentracing.HTTPHeaders, + opentracing.HTTPHeadersCarrier(req.Header), + ) + + return xhttp.Do(req) +} diff --git a/chapter-04/go/exercise5/people/repository.go b/chapter-04/go/exercise5/people/repository.go new file mode 100644 index 0000000..948f8cf --- /dev/null +++ b/chapter-04/go/exercise5/people/repository.go @@ -0,0 +1,78 @@ +package people + +import ( + "context" + "database/sql" + "log" + + _ "github.com/go-sql-driver/mysql" + opentracing "github.com/opentracing/opentracing-go" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/model" +) + +const dburl = "root:mysqlpwd@tcp(127.0.0.1:3306)/chapter04" + +// Repository retrieves information about people. +type Repository struct { + db *sql.DB +} + +// NewRepository creates a new Repository backed by MySQL database. +func NewRepository() *Repository { + db, err := sql.Open("mysql", dburl) + if err != nil { + log.Fatal(err) + } + err = db.Ping() + if err != nil { + log.Fatalf("Cannot ping the db: %v", err) + } + return &Repository{ + db: db, + } +} + +// GetPerson tries to find the person in the database by name. +// If not found, it still returns a Person object with only name +// field populated. +func (r *Repository) GetPerson( + ctx context.Context, + name string, +) (model.Person, error) { + query := "select title, description from people where name = ?" + + span, ctx := opentracing.StartSpanFromContext( + ctx, + "get-person", + opentracing.Tag{Key: "db.statement", Value: query}, + ) + defer span.Finish() + + rows, err := r.db.QueryContext(ctx, query, name) + if err != nil { + return model.Person{}, err + } + defer rows.Close() + + for rows.Next() { + var title, descr string + err := rows.Scan(&title, &descr) + if err != nil { + return model.Person{}, err + } + return model.Person{ + Name: name, + Title: title, + Description: descr, + }, nil + } + return model.Person{ + Name: name, + }, nil +} + +// Close calls close on the underlying db connection. +func (r *Repository) Close() { + r.db.Close() +} diff --git a/chapter-04/go/exercise6/bigbrother/main.go b/chapter-04/go/exercise6/bigbrother/main.go new file mode 100644 index 0000000..b084334 --- /dev/null +++ b/chapter-04/go/exercise6/bigbrother/main.go @@ -0,0 +1,51 @@ +package main + +import ( + "encoding/json" + "net/http" + "strings" + + opentracing "github.com/opentracing/opentracing-go" + otlog "github.com/opentracing/opentracing-go/log" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/exercise6/othttp" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/exercise6/people" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/tracing" +) + +var repo *people.Repository + +func main() { + tracer, closer := tracing.Init("go-6-bigbrother") + defer closer.Close() + opentracing.SetGlobalTracer(tracer) + + repo = people.NewRepository() + defer repo.Close() + + http.HandleFunc("/getPerson/", handleGetPerson) + othttp.ListenAndServe(":8081", "/getPerson") +} + +func handleGetPerson(w http.ResponseWriter, r *http.Request) { + span := opentracing.SpanFromContext(r.Context()) + + name := strings.TrimPrefix(r.URL.Path, "/getPerson/") + person, err := repo.GetPerson(r.Context(), name) + + if err != nil { + span.SetTag("error", true) + span.LogFields(otlog.Error(err)) + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } + + span.LogKV( + "name", person.Name, + "title", person.Title, + "description", person.Description, + ) + + bytes, _ := json.Marshal(person) + w.Write(bytes) +} diff --git a/chapter-04/go/exercise6/formatter/main.go b/chapter-04/go/exercise6/formatter/main.go new file mode 100644 index 0000000..8e9fd5d --- /dev/null +++ b/chapter-04/go/exercise6/formatter/main.go @@ -0,0 +1,51 @@ +package main + +import ( + "context" + "net/http" + + opentracing "github.com/opentracing/opentracing-go" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/exercise6/othttp" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/tracing" +) + +func main() { + tracer, closer := tracing.Init("go-6-formatter") + defer closer.Close() + opentracing.SetGlobalTracer(tracer) + + http.HandleFunc("/formatGreeting", handleFormatGreeting) + othttp.ListenAndServe(":8082", "/formatGreeting") +} + +func handleFormatGreeting(w http.ResponseWriter, r *http.Request) { + name := r.FormValue("name") + title := r.FormValue("title") + descr := r.FormValue("description") + + greeting := FormatGreeting(r.Context(), name, title, descr) + w.Write([]byte(greeting)) +} + +// FormatGreeting combines information about a person into a greeting string. +func FormatGreeting( + ctx context.Context, + name, title, description string, +) string { + span := opentracing.SpanFromContext(ctx) + + greeting := span.BaggageItem("greeting") + if greeting == "" { + greeting = "Hello" + } + response := greeting + ", " + if title != "" { + response += title + " " + } + response += name + "!" + if description != "" { + response += " " + description + } + return response +} diff --git a/chapter-04/go/exercise6/hello.go b/chapter-04/go/exercise6/hello.go new file mode 100644 index 0000000..96ed837 --- /dev/null +++ b/chapter-04/go/exercise6/hello.go @@ -0,0 +1,98 @@ +package main + +import ( + "context" + "encoding/json" + "net/http" + "net/url" + "strings" + + "github.com/opentracing-contrib/go-stdlib/nethttp" + opentracing "github.com/opentracing/opentracing-go" + otlog "github.com/opentracing/opentracing-go/log" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/exercise6/othttp" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/http" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/model" + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/tracing" +) + +var client = &http.Client{Transport: &nethttp.Transport{}} + +func main() { + tracer, closer := tracing.Init("go-6-hello") + defer closer.Close() + opentracing.SetGlobalTracer(tracer) + + http.HandleFunc("/sayHello/", handleSayHello) + othttp.ListenAndServe(":8080", "/sayHello") +} + +func handleSayHello(w http.ResponseWriter, r *http.Request) { + span := opentracing.SpanFromContext(r.Context()) + + name := strings.TrimPrefix(r.URL.Path, "/sayHello/") + greeting, err := SayHello(r.Context(), name) + if err != nil { + span.SetTag("error", true) + span.LogFields(otlog.Error(err)) + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } + + span.SetTag("response", greeting) + w.Write([]byte(greeting)) +} + +// SayHello creates a greeting for the named person. +func SayHello(ctx context.Context, name string) (string, error) { + person, err := getPerson(ctx, name) + if err != nil { + return "", err + } + + return formatGreeting(ctx, person) +} + +func getPerson(ctx context.Context, name string) (*model.Person, error) { + url := "http://localhost:8081/getPerson/" + name + res, err := get(ctx, "getPerson", url) + if err != nil { + return nil, err + } + + var person model.Person + if err := json.Unmarshal(res, &person); err != nil { + return nil, err + } + return &person, nil +} + +func formatGreeting( + ctx context.Context, + person *model.Person, +) (string, error) { + v := url.Values{} + v.Set("name", person.Name) + v.Set("title", person.Title) + v.Set("description", person.Description) + url := "http://localhost:8082/formatGreeting?" + v.Encode() + res, err := get(ctx, "formatGreeting", url) + if err != nil { + return "", err + } + return string(res), nil +} + +func get(ctx context.Context, operationName, url string) ([]byte, error) { + req, err := http.NewRequest("GET", url, nil) + if err != nil { + return nil, err + } + req = req.WithContext(ctx) + + req, ht := nethttp.TraceRequest(opentracing.GlobalTracer(), req) + defer ht.Finish() + + return xhttp.DoWithClient(req, client) +} diff --git a/chapter-04/go/exercise6/othttp/middleware.go b/chapter-04/go/exercise6/othttp/middleware.go new file mode 100644 index 0000000..7308fcf --- /dev/null +++ b/chapter-04/go/exercise6/othttp/middleware.go @@ -0,0 +1,23 @@ +package othttp + +import ( + "log" + "net/http" + + "github.com/opentracing-contrib/go-stdlib/nethttp" + "github.com/opentracing/opentracing-go" +) + +// ListenAndServe starts an instrumented server with a single endpoint. +func ListenAndServe(hostPort string, endpoint string) { + mw := nethttp.Middleware( + opentracing.GlobalTracer(), + http.DefaultServeMux, + nethttp.OperationNameFunc(func(r *http.Request) string { + return "HTTP " + r.Method + ":" + endpoint + }), + ) + + log.Print("Listening on http://" + hostPort) + log.Fatal(http.ListenAndServe(hostPort, mw)) +} diff --git a/chapter-04/go/exercise6/people/repository.go b/chapter-04/go/exercise6/people/repository.go new file mode 100644 index 0000000..948f8cf --- /dev/null +++ b/chapter-04/go/exercise6/people/repository.go @@ -0,0 +1,78 @@ +package people + +import ( + "context" + "database/sql" + "log" + + _ "github.com/go-sql-driver/mysql" + opentracing "github.com/opentracing/opentracing-go" + + "github.com/PacktPublishing/Distributed-Tracing/chapter-04/go/lib/model" +) + +const dburl = "root:mysqlpwd@tcp(127.0.0.1:3306)/chapter04" + +// Repository retrieves information about people. +type Repository struct { + db *sql.DB +} + +// NewRepository creates a new Repository backed by MySQL database. +func NewRepository() *Repository { + db, err := sql.Open("mysql", dburl) + if err != nil { + log.Fatal(err) + } + err = db.Ping() + if err != nil { + log.Fatalf("Cannot ping the db: %v", err) + } + return &Repository{ + db: db, + } +} + +// GetPerson tries to find the person in the database by name. +// If not found, it still returns a Person object with only name +// field populated. +func (r *Repository) GetPerson( + ctx context.Context, + name string, +) (model.Person, error) { + query := "select title, description from people where name = ?" + + span, ctx := opentracing.StartSpanFromContext( + ctx, + "get-person", + opentracing.Tag{Key: "db.statement", Value: query}, + ) + defer span.Finish() + + rows, err := r.db.QueryContext(ctx, query, name) + if err != nil { + return model.Person{}, err + } + defer rows.Close() + + for rows.Next() { + var title, descr string + err := rows.Scan(&title, &descr) + if err != nil { + return model.Person{}, err + } + return model.Person{ + Name: name, + Title: title, + Description: descr, + }, nil + } + return model.Person{ + Name: name, + }, nil +} + +// Close calls close on the underlying db connection. +func (r *Repository) Close() { + r.db.Close() +} diff --git a/chapter-04/go/lib/http/client.go b/chapter-04/go/lib/http/client.go new file mode 100644 index 0000000..70c47a6 --- /dev/null +++ b/chapter-04/go/lib/http/client.go @@ -0,0 +1,44 @@ +package xhttp + +import ( + "fmt" + "io/ioutil" + "net/http" +) + +// Get executes an HTTP GET request and returns the response body. +// Any errors or non-200 status code result in an error. +func Get(url string) ([]byte, error) { + req, err := http.NewRequest("GET", url, nil) + if err != nil { + return nil, err + } + return Do(req) +} + +// Do executes an HTTP request and returns the response body. +// Any errors or non-200 status code result in an error. +func Do(req *http.Request) ([]byte, error) { + return DoWithClient(req, http.DefaultClient) +} + +// DoWithClient executes an HTTP request and returns the response body. +// Any errors or non-200 status code result in an error. +func DoWithClient(req *http.Request, client *http.Client) ([]byte, error) { + resp, err := client.Do(req) + if err != nil { + return nil, err + } + defer resp.Body.Close() + + body, err := ioutil.ReadAll(resp.Body) + if err != nil { + return nil, err + } + + if resp.StatusCode != 200 { + return nil, fmt.Errorf("StatusCode: %d, Body: %s", resp.StatusCode, body) + } + + return body, nil +} diff --git a/chapter-04/go/lib/model/person.go b/chapter-04/go/lib/model/person.go new file mode 100644 index 0000000..b7c529e --- /dev/null +++ b/chapter-04/go/lib/model/person.go @@ -0,0 +1,8 @@ +package model + +// Person represents a person. +type Person struct { + Name string + Title string + Description string +} diff --git a/chapter-04/go/lib/tracing/init.go b/chapter-04/go/lib/tracing/init.go new file mode 100644 index 0000000..4e4623e --- /dev/null +++ b/chapter-04/go/lib/tracing/init.go @@ -0,0 +1,32 @@ +package tracing + +import ( + "io" + "log" + + opentracing "github.com/opentracing/opentracing-go" + jaeger "github.com/uber/jaeger-client-go" + config "github.com/uber/jaeger-client-go/config" +) + +// Init returns an instance of Jaeger Tracer that samples 100% +// of traces and logs all spans to stdout. +func Init(service string) (opentracing.Tracer, io.Closer) { + cfg := &config.Configuration{ + Sampler: &config.SamplerConfig{ + Type: "const", + Param: 1, + }, + Reporter: &config.ReporterConfig{ + LogSpans: true, + }, + } + tracer, closer, err := cfg.New( + service, + config.Logger(jaeger.StdLogger), + ) + if err != nil { + log.Fatalf("ERROR: cannot init Jaeger: %v", err) + } + return tracer, closer +} diff --git a/chapter-04/java/.gitignore b/chapter-04/java/.gitignore new file mode 100644 index 0000000..d11829c --- /dev/null +++ b/chapter-04/java/.gitignore @@ -0,0 +1,4 @@ +.classpath +.project +.settings/ +target/ diff --git a/chapter-04/java/.mvn/wrapper/.gitignore b/chapter-04/java/.mvn/wrapper/.gitignore new file mode 100644 index 0000000..e72f5e8 --- /dev/null +++ b/chapter-04/java/.mvn/wrapper/.gitignore @@ -0,0 +1 @@ +maven-wrapper.jar diff --git a/chapter-04/java/.mvn/wrapper/MavenWrapperDownloader.java b/chapter-04/java/.mvn/wrapper/MavenWrapperDownloader.java new file mode 100755 index 0000000..fa4f7b4 --- /dev/null +++ b/chapter-04/java/.mvn/wrapper/MavenWrapperDownloader.java @@ -0,0 +1,110 @@ +/* +Licensed to the Apache Software Foundation (ASF) under one +or more contributor license agreements. See the NOTICE file +distributed with this work for additional information +regarding copyright ownership. The ASF licenses this file +to you under the Apache License, Version 2.0 (the +"License"); you may not use this file except in compliance +with the License. You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, +software distributed under the License is distributed on an +"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +KIND, either express or implied. See the License for the +specific language governing permissions and limitations +under the License. +*/ + +import java.net.*; +import java.io.*; +import java.nio.channels.*; +import java.util.Properties; + +public class MavenWrapperDownloader { + + /** + * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided. + */ + private static final String DEFAULT_DOWNLOAD_URL = + "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.2/maven-wrapper-0.4.2.jar"; + + /** + * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to + * use instead of the default one. + */ + private static final String MAVEN_WRAPPER_PROPERTIES_PATH = + ".mvn/wrapper/maven-wrapper.properties"; + + /** + * Path where the maven-wrapper.jar will be saved to. + */ + private static final String MAVEN_WRAPPER_JAR_PATH = + ".mvn/wrapper/maven-wrapper.jar"; + + /** + * Name of the property which should be used to override the default download url for the wrapper. + */ + private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl"; + + public static void main(String args[]) { + System.out.println("- Downloader started"); + File baseDirectory = new File(args[0]); + System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath()); + + // If the maven-wrapper.properties exists, read it and check if it contains a custom + // wrapperUrl parameter. + File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH); + String url = DEFAULT_DOWNLOAD_URL; + if(mavenWrapperPropertyFile.exists()) { + FileInputStream mavenWrapperPropertyFileInputStream = null; + try { + mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile); + Properties mavenWrapperProperties = new Properties(); + mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream); + url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url); + } catch (IOException e) { + System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'"); + } finally { + try { + if(mavenWrapperPropertyFileInputStream != null) { + mavenWrapperPropertyFileInputStream.close(); + } + } catch (IOException e) { + // Ignore ... + } + } + } + System.out.println("- Downloading from: : " + url); + + File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH); + if(!outputFile.getParentFile().exists()) { + if(!outputFile.getParentFile().mkdirs()) { + System.out.println( + "- ERROR creating output direcrory '" + outputFile.getParentFile().getAbsolutePath() + "'"); + } + } + System.out.println("- Downloading to: " + outputFile.getAbsolutePath()); + try { + downloadFileFromURL(url, outputFile); + System.out.println("Done"); + System.exit(0); + } catch (Throwable e) { + System.out.println("- Error downloading"); + e.printStackTrace(); + System.exit(1); + } + } + + private static void downloadFileFromURL(String urlString, File destination) throws Exception { + URL website = new URL(urlString); + ReadableByteChannel rbc; + rbc = Channels.newChannel(website.openStream()); + FileOutputStream fos = new FileOutputStream(destination); + fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE); + fos.close(); + rbc.close(); + } + +} diff --git a/chapter-04/java/.mvn/wrapper/maven-wrapper.properties b/chapter-04/java/.mvn/wrapper/maven-wrapper.properties new file mode 100755 index 0000000..00d32aa --- /dev/null +++ b/chapter-04/java/.mvn/wrapper/maven-wrapper.properties @@ -0,0 +1 @@ +distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.5.4/apache-maven-3.5.4-bin.zip \ No newline at end of file diff --git a/chapter-04/java/mvnw b/chapter-04/java/mvnw new file mode 100755 index 0000000..5551fde --- /dev/null +++ b/chapter-04/java/mvnw @@ -0,0 +1,286 @@ +#!/bin/sh +# ---------------------------------------------------------------------------- +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. +# ---------------------------------------------------------------------------- + +# ---------------------------------------------------------------------------- +# Maven2 Start Up Batch script +# +# Required ENV vars: +# ------------------ +# JAVA_HOME - location of a JDK home dir +# +# Optional ENV vars +# ----------------- +# M2_HOME - location of maven2's installed home dir +# MAVEN_OPTS - parameters passed to the Java VM when running Maven +# e.g. to debug Maven itself, use +# set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000 +# MAVEN_SKIP_RC - flag to disable loading of mavenrc files +# ---------------------------------------------------------------------------- + +if [ -z "$MAVEN_SKIP_RC" ] ; then + + if [ -f /etc/mavenrc ] ; then + . /etc/mavenrc + fi + + if [ -f "$HOME/.mavenrc" ] ; then + . "$HOME/.mavenrc" + fi + +fi + +# OS specific support. $var _must_ be set to either true or false. +cygwin=false; +darwin=false; +mingw=false +case "`uname`" in + CYGWIN*) cygwin=true ;; + MINGW*) mingw=true;; + Darwin*) darwin=true + # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home + # See https://developer.apple.com/library/mac/qa/qa1170/_index.html + if [ -z "$JAVA_HOME" ]; then + if [ -x "/usr/libexec/java_home" ]; then + export JAVA_HOME="`/usr/libexec/java_home`" + else + export JAVA_HOME="/Library/Java/Home" + fi + fi + ;; +esac + +if [ -z "$JAVA_HOME" ] ; then + if [ -r /etc/gentoo-release ] ; then + JAVA_HOME=`java-config --jre-home` + fi +fi + +if [ -z "$M2_HOME" ] ; then + ## resolve links - $0 may be a link to maven's home + PRG="$0" + + # need this for relative symlinks + while [ -h "$PRG" ] ; do + ls=`ls -ld "$PRG"` + link=`expr "$ls" : '.*-> \(.*\)$'` + if expr "$link" : '/.*' > /dev/null; then + PRG="$link" + else + PRG="`dirname "$PRG"`/$link" + fi + done + + saveddir=`pwd` + + M2_HOME=`dirname "$PRG"`/.. + + # make it fully qualified + M2_HOME=`cd "$M2_HOME" && pwd` + + cd "$saveddir" + # echo Using m2 at $M2_HOME +fi + +# For Cygwin, ensure paths are in UNIX format before anything is touched +if $cygwin ; then + [ -n "$M2_HOME" ] && + M2_HOME=`cygpath --unix "$M2_HOME"` + [ -n "$JAVA_HOME" ] && + JAVA_HOME=`cygpath --unix "$JAVA_HOME"` + [ -n "$CLASSPATH" ] && + CLASSPATH=`cygpath --path --unix "$CLASSPATH"` +fi + +# For Mingw, ensure paths are in UNIX format before anything is touched +if $mingw ; then + [ -n "$M2_HOME" ] && + M2_HOME="`(cd "$M2_HOME"; pwd)`" + [ -n "$JAVA_HOME" ] && + JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`" + # TODO classpath? +fi + +if [ -z "$JAVA_HOME" ]; then + javaExecutable="`which javac`" + if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then + # readlink(1) is not available as standard on Solaris 10. + readLink=`which readlink` + if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then + if $darwin ; then + javaHome="`dirname \"$javaExecutable\"`" + javaExecutable="`cd \"$javaHome\" && pwd -P`/javac" + else + javaExecutable="`readlink -f \"$javaExecutable\"`" + fi + javaHome="`dirname \"$javaExecutable\"`" + javaHome=`expr "$javaHome" : '\(.*\)/bin'` + JAVA_HOME="$javaHome" + export JAVA_HOME + fi + fi +fi + +if [ -z "$JAVACMD" ] ; then + if [ -n "$JAVA_HOME" ] ; then + if [ -x "$JAVA_HOME/jre/sh/java" ] ; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD="$JAVA_HOME/jre/sh/java" + else + JAVACMD="$JAVA_HOME/bin/java" + fi + else + JAVACMD="`which java`" + fi +fi + +if [ ! -x "$JAVACMD" ] ; then + echo "Error: JAVA_HOME is not defined correctly." >&2 + echo " We cannot execute $JAVACMD" >&2 + exit 1 +fi + +if [ -z "$JAVA_HOME" ] ; then + echo "Warning: JAVA_HOME environment variable is not set." +fi + +CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher + +# traverses directory structure from process work directory to filesystem root +# first directory with .mvn subdirectory is considered project base directory +find_maven_basedir() { + + if [ -z "$1" ] + then + echo "Path not specified to find_maven_basedir" + return 1 + fi + + basedir="$1" + wdir="$1" + while [ "$wdir" != '/' ] ; do + if [ -d "$wdir"/.mvn ] ; then + basedir=$wdir + break + fi + # workaround for JBEAP-8937 (on Solaris 10/Sparc) + if [ -d "${wdir}" ]; then + wdir=`cd "$wdir/.."; pwd` + fi + # end of workaround + done + echo "${basedir}" +} + +# concatenates all lines of a file +concat_lines() { + if [ -f "$1" ]; then + echo "$(tr -s '\n' ' ' < "$1")" + fi +} + +BASE_DIR=`find_maven_basedir "$(pwd)"` +if [ -z "$BASE_DIR" ]; then + exit 1; +fi + +########################################################################################## +# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central +# This allows using the maven wrapper in projects that prohibit checking in binary data. +########################################################################################## +if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then + if [ "$MVNW_VERBOSE" = true ]; then + echo "Found .mvn/wrapper/maven-wrapper.jar" + fi +else + if [ "$MVNW_VERBOSE" = true ]; then + echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..." + fi + jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.2/maven-wrapper-0.4.2.jar" + while IFS="=" read key value; do + case "$key" in (wrapperUrl) jarUrl="$value"; break ;; + esac + done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties" + if [ "$MVNW_VERBOSE" = true ]; then + echo "Downloading from: $jarUrl" + fi + wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" + + if command -v wget > /dev/null; then + if [ "$MVNW_VERBOSE" = true ]; then + echo "Found wget ... using wget" + fi + wget "$jarUrl" -O "$wrapperJarPath" + elif command -v curl > /dev/null; then + if [ "$MVNW_VERBOSE" = true ]; then + echo "Found curl ... using curl" + fi + curl -o "$wrapperJarPath" "$jarUrl" + else + if [ "$MVNW_VERBOSE" = true ]; then + echo "Falling back to using Java to download" + fi + javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java" + if [ -e "$javaClass" ]; then + if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then + if [ "$MVNW_VERBOSE" = true ]; then + echo " - Compiling MavenWrapperDownloader.java ..." + fi + # Compiling the Java class + ("$JAVA_HOME/bin/javac" "$javaClass") + fi + if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then + # Running the downloader + if [ "$MVNW_VERBOSE" = true ]; then + echo " - Running MavenWrapperDownloader.java ..." + fi + ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR") + fi + fi + fi +fi +########################################################################################## +# End of extension +########################################################################################## + +export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"} +if [ "$MVNW_VERBOSE" = true ]; then + echo $MAVEN_PROJECTBASEDIR +fi +MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS" + +# For Cygwin, switch paths to Windows format before running java +if $cygwin; then + [ -n "$M2_HOME" ] && + M2_HOME=`cygpath --path --windows "$M2_HOME"` + [ -n "$JAVA_HOME" ] && + JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"` + [ -n "$CLASSPATH" ] && + CLASSPATH=`cygpath --path --windows "$CLASSPATH"` + [ -n "$MAVEN_PROJECTBASEDIR" ] && + MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"` +fi + +WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain + +exec "$JAVACMD" \ + $MAVEN_OPTS \ + -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \ + "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \ + ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@" diff --git a/chapter-04/java/mvnw.cmd b/chapter-04/java/mvnw.cmd new file mode 100755 index 0000000..48363fa --- /dev/null +++ b/chapter-04/java/mvnw.cmd @@ -0,0 +1,161 @@ +@REM ---------------------------------------------------------------------------- +@REM Licensed to the Apache Software Foundation (ASF) under one +@REM or more contributor license agreements. See the NOTICE file +@REM distributed with this work for additional information +@REM regarding copyright ownership. The ASF licenses this file +@REM to you under the Apache License, Version 2.0 (the +@REM "License"); you may not use this file except in compliance +@REM with the License. You may obtain a copy of the License at +@REM +@REM http://www.apache.org/licenses/LICENSE-2.0 +@REM +@REM Unless required by applicable law or agreed to in writing, +@REM software distributed under the License is distributed on an +@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +@REM KIND, either express or implied. See the License for the +@REM specific language governing permissions and limitations +@REM under the License. +@REM ---------------------------------------------------------------------------- + +@REM ---------------------------------------------------------------------------- +@REM Maven2 Start Up Batch script +@REM +@REM Required ENV vars: +@REM JAVA_HOME - location of a JDK home dir +@REM +@REM Optional ENV vars +@REM M2_HOME - location of maven2's installed home dir +@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands +@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a key stroke before ending +@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven +@REM e.g. to debug Maven itself, use +@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000 +@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files +@REM ---------------------------------------------------------------------------- + +@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on' +@echo off +@REM set title of command window +title %0 +@REM enable echoing my setting MAVEN_BATCH_ECHO to 'on' +@if "%MAVEN_BATCH_ECHO%" == "on" echo %MAVEN_BATCH_ECHO% + +@REM set %HOME% to equivalent of $HOME +if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%") + +@REM Execute a user defined script before this one +if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre +@REM check for pre script, once with legacy .bat ending and once with .cmd ending +if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat" +if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd" +:skipRcPre + +@setlocal + +set ERROR_CODE=0 + +@REM To isolate internal variables from possible post scripts, we use another setlocal +@setlocal + +@REM ==== START VALIDATION ==== +if not "%JAVA_HOME%" == "" goto OkJHome + +echo. +echo Error: JAVA_HOME not found in your environment. >&2 +echo Please set the JAVA_HOME variable in your environment to match the >&2 +echo location of your Java installation. >&2 +echo. +goto error + +:OkJHome +if exist "%JAVA_HOME%\bin\java.exe" goto init + +echo. +echo Error: JAVA_HOME is set to an invalid directory. >&2 +echo JAVA_HOME = "%JAVA_HOME%" >&2 +echo Please set the JAVA_HOME variable in your environment to match the >&2 +echo location of your Java installation. >&2 +echo. +goto error + +@REM ==== END VALIDATION ==== + +:init + +@REM Find the project base dir, i.e. the directory that contains the folder ".mvn". +@REM Fallback to current working directory if not found. + +set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR% +IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir + +set EXEC_DIR=%CD% +set WDIR=%EXEC_DIR% +:findBaseDir +IF EXIST "%WDIR%"\.mvn goto baseDirFound +cd .. +IF "%WDIR%"=="%CD%" goto baseDirNotFound +set WDIR=%CD% +goto findBaseDir + +:baseDirFound +set MAVEN_PROJECTBASEDIR=%WDIR% +cd "%EXEC_DIR%" +goto endDetectBaseDir + +:baseDirNotFound +set MAVEN_PROJECTBASEDIR=%EXEC_DIR% +cd "%EXEC_DIR%" + +:endDetectBaseDir + +IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig + +@setlocal EnableExtensions EnableDelayedExpansion +for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a +@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS% + +:endReadAdditionalConfig + +SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe" +set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar" +set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain + +set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.2/maven-wrapper-0.4.2.jar" +FOR /F "tokens=1,2 delims==" %%A IN (%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties) DO ( + IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B +) + +@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central +@REM This allows using the maven wrapper in projects that prohibit checking in binary data. +if exist %WRAPPER_JAR% ( + echo Found %WRAPPER_JAR% +) else ( + echo Couldn't find %WRAPPER_JAR%, downloading it ... + echo Downloading from: %DOWNLOAD_URL% + powershell -Command "(New-Object Net.WebClient).DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')" + echo Finished downloading %WRAPPER_JAR% +) +@REM End of extension + +%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %* +if ERRORLEVEL 1 goto error +goto end + +:error +set ERROR_CODE=1 + +:end +@endlocal & set ERROR_CODE=%ERROR_CODE% + +if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost +@REM check for post script, once with legacy .bat ending and once with .cmd ending +if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat" +if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd" +:skipRcPost + +@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on' +if "%MAVEN_BATCH_PAUSE%" == "on" pause + +if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE% + +exit /B %ERROR_CODE% diff --git a/chapter-04/java/pom.xml b/chapter-04/java/pom.xml new file mode 100644 index 0000000..07e2a70 --- /dev/null +++ b/chapter-04/java/pom.xml @@ -0,0 +1,78 @@ + + + 4.0.0 + + com.packt + distributed-tracing + 0.0.1-SNAPSHOT + jar + + OpenTracing Instrumentation + Chapter 4 - OpenTracing Instrumentation + + + org.springframework.boot + spring-boot-starter-parent + 2.0.4.RELEASE + + + + + + UTF-8 + UTF-8 + 1.8 + exercise1.HelloApp + + + + + org.springframework.boot + spring-boot-starter-web + + + org.springframework.boot + spring-boot-starter-data-jpa + + + mysql + mysql-connector-java + + + io.opentracing + opentracing-api + 0.31.0 + + + + io.jaegertracing + jaeger-client + 0.31.0 + + + + org.springframework.boot + spring-boot-starter-test + test + + + + + + + org.springframework.boot + spring-boot-maven-plugin + + ${main.class} + + + + + diff --git a/chapter-04/java/src/main/java/exercise1/HelloApp.java b/chapter-04/java/src/main/java/exercise1/HelloApp.java new file mode 100644 index 0000000..8bd21f5 --- /dev/null +++ b/chapter-04/java/src/main/java/exercise1/HelloApp.java @@ -0,0 +1,16 @@ +package exercise1; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.boot.autoconfigure.domain.EntityScan; +import org.springframework.data.jpa.repository.config.EnableJpaRepositories; + +@EnableJpaRepositories("lib.people") +@EntityScan("lib.people") +@SpringBootApplication +public class HelloApp { + + public static void main(String[] args) { + SpringApplication.run(HelloApp.class, args); + } +} diff --git a/chapter-04/java/src/main/java/exercise1/HelloController.java b/chapter-04/java/src/main/java/exercise1/HelloController.java new file mode 100644 index 0000000..85fa934 --- /dev/null +++ b/chapter-04/java/src/main/java/exercise1/HelloController.java @@ -0,0 +1,45 @@ +package exercise1; + +import java.util.Optional; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.PathVariable; +import org.springframework.web.bind.annotation.RestController; + +import lib.people.Person; +import lib.people.PersonRepository; + +@RestController +public class HelloController { + + @Autowired + private PersonRepository personRepository; + + @GetMapping("/sayHello/{name}") + public String sayHello(@PathVariable String name) { + Person person = getPerson(name); + String response = formatGreeting(person); + return response; + } + + private Person getPerson(String name) { + Optional personOpt = personRepository.findById(name); + if (personOpt.isPresent()) { + return personOpt.get(); + } + return new Person(name); + } + + private String formatGreeting(Person person) { + String response = "Hello, "; + if (!person.getTitle().isEmpty()) { + response += person.getTitle() + " "; + } + response += person.getName() + "!"; + if (!person.getDescription().isEmpty()) { + response += " " + person.getDescription(); + } + return response; + } +} diff --git a/chapter-04/java/src/main/java/exercise2/HelloApp.java b/chapter-04/java/src/main/java/exercise2/HelloApp.java new file mode 100644 index 0000000..6beafab --- /dev/null +++ b/chapter-04/java/src/main/java/exercise2/HelloApp.java @@ -0,0 +1,28 @@ +package exercise2; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.boot.autoconfigure.domain.EntityScan; +import org.springframework.context.annotation.Bean; +import org.springframework.data.jpa.repository.config.EnableJpaRepositories; + +import io.jaegertracing.Configuration; +import io.jaegertracing.Configuration.ReporterConfiguration; +import io.jaegertracing.Configuration.SamplerConfiguration; + +@EnableJpaRepositories("lib.people") +@EntityScan("lib.people") +@SpringBootApplication +public class HelloApp { + + @Bean + public io.opentracing.Tracer initTracer() { + SamplerConfiguration samplerConfig = new SamplerConfiguration().withType("const").withParam(1); + ReporterConfiguration reporterConfig = new ReporterConfiguration().withLogSpans(true); + return new Configuration("java-2-hello").withSampler(samplerConfig).withReporter(reporterConfig).getTracer(); + } + + public static void main(String[] args) { + SpringApplication.run(HelloApp.class, args); + } +} diff --git a/chapter-04/java/src/main/java/exercise2/HelloController.java b/chapter-04/java/src/main/java/exercise2/HelloController.java new file mode 100644 index 0000000..88bd984 --- /dev/null +++ b/chapter-04/java/src/main/java/exercise2/HelloController.java @@ -0,0 +1,65 @@ +package exercise2; + +import java.util.LinkedHashMap; +import java.util.Map; +import java.util.Optional; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.PathVariable; +import org.springframework.web.bind.annotation.RestController; + +import io.opentracing.Span; +import io.opentracing.Tracer; +import lib.people.Person; +import lib.people.PersonRepository; + +@RestController +public class HelloController { + + @Autowired + private PersonRepository personRepository; + + @Autowired + private Tracer tracer; + + @GetMapping("/sayHello/{name}") + public String sayHello(@PathVariable String name) { + Span span = tracer.buildSpan("say-hello").start(); + try { + Person person = getPerson(name); + Map fields = new LinkedHashMap<>(); + fields.put("name", person.getName()); + fields.put("title", person.getTitle()); + fields.put("description", person.getDescription()); + span.log(fields); + + String response = formatGreeting(person); + span.setTag("response", response); + + return response; + } finally { + span.finish(); + } + } + + private Person getPerson(String name) { + Optional personOpt = personRepository.findById(name); + if (personOpt.isPresent()) { + return personOpt.get(); + } + return new Person(name); + } + + private String formatGreeting(Person person) { + String response = "Hello, "; + if (!person.getTitle().isEmpty()) { + response += person.getTitle() + " "; + } + response += person.getName() + "!"; + if (!person.getDescription().isEmpty()) { + response += " " + person.getDescription(); + } + return response; + } +} diff --git a/chapter-04/java/src/main/java/exercise3a/HelloApp.java b/chapter-04/java/src/main/java/exercise3a/HelloApp.java new file mode 100644 index 0000000..62b42fe --- /dev/null +++ b/chapter-04/java/src/main/java/exercise3a/HelloApp.java @@ -0,0 +1,28 @@ +package exercise3a; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.boot.autoconfigure.domain.EntityScan; +import org.springframework.context.annotation.Bean; +import org.springframework.data.jpa.repository.config.EnableJpaRepositories; + +import io.jaegertracing.Configuration; +import io.jaegertracing.Configuration.ReporterConfiguration; +import io.jaegertracing.Configuration.SamplerConfiguration; + +@EnableJpaRepositories("lib.people") +@EntityScan("lib.people") +@SpringBootApplication +public class HelloApp { + + @Bean + public io.opentracing.Tracer initTracer() { + SamplerConfiguration samplerConfig = new SamplerConfiguration().withType("const").withParam(1); + ReporterConfiguration reporterConfig = new ReporterConfiguration().withLogSpans(true); + return new Configuration("java-3-hello").withSampler(samplerConfig).withReporter(reporterConfig).getTracer(); + } + + public static void main(String[] args) { + SpringApplication.run(HelloApp.class, args); + } +} diff --git a/chapter-04/java/src/main/java/exercise3a/HelloController.java b/chapter-04/java/src/main/java/exercise3a/HelloController.java new file mode 100644 index 0000000..4b8498b --- /dev/null +++ b/chapter-04/java/src/main/java/exercise3a/HelloController.java @@ -0,0 +1,76 @@ +package exercise3a; + +import java.util.LinkedHashMap; +import java.util.Map; +import java.util.Optional; + +import io.opentracing.Tracer; +import io.opentracing.Span; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.PathVariable; +import org.springframework.web.bind.annotation.RestController; + +import lib.people.Person; +import lib.people.PersonRepository; + +@RestController +public class HelloController { + + @Autowired + private PersonRepository personRepository; + + @Autowired + private Tracer tracer; + + @GetMapping("/sayHello/{name}") + public String sayHello(@PathVariable String name) { + Span span = tracer.buildSpan("say-hello").start(); + try { + Person person = getPerson(name, span); + Map fields = new LinkedHashMap<>(); + fields.put("name", person.getName()); + fields.put("title", person.getTitle()); + fields.put("description", person.getDescription()); + span.log(fields); + + String response = formatGreeting(person, span); + span.setTag("response", response); + + return response; + } finally { + span.finish(); + } + } + + private Person getPerson(String name, Span parent) { + Span span = tracer.buildSpan("get-person").asChildOf(parent).start(); + try { + Optional personOpt = personRepository.findById(name); + if (personOpt.isPresent()) { + return personOpt.get(); + } + return new Person(name); + } finally { + span.finish(); + } + } + + private String formatGreeting(Person person, Span parent) { + Span span = tracer.buildSpan("format-greeting").asChildOf(parent).start(); + try { + String response = "Hello, "; + if (!person.getTitle().isEmpty()) { + response += person.getTitle() + " "; + } + response += person.getName() + "!"; + if (!person.getDescription().isEmpty()) { + response += " " + person.getDescription(); + } + return response; + } finally { + span.finish(); + } + } +} diff --git a/chapter-04/java/src/main/java/exercise3b/HelloApp.java b/chapter-04/java/src/main/java/exercise3b/HelloApp.java new file mode 100644 index 0000000..0e6183a --- /dev/null +++ b/chapter-04/java/src/main/java/exercise3b/HelloApp.java @@ -0,0 +1,28 @@ +package exercise3b; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.boot.autoconfigure.domain.EntityScan; +import org.springframework.context.annotation.Bean; +import org.springframework.data.jpa.repository.config.EnableJpaRepositories; + +import io.jaegertracing.Configuration; +import io.jaegertracing.Configuration.ReporterConfiguration; +import io.jaegertracing.Configuration.SamplerConfiguration; + +@EnableJpaRepositories("lib.people") +@EntityScan("lib.people") +@SpringBootApplication +public class HelloApp { + + @Bean + public io.opentracing.Tracer initTracer() { + SamplerConfiguration samplerConfig = new SamplerConfiguration().withType("const").withParam(1); + ReporterConfiguration reporterConfig = new ReporterConfiguration().withLogSpans(true); + return new Configuration("java-3-hello").withSampler(samplerConfig).withReporter(reporterConfig).getTracer(); + } + + public static void main(String[] args) { + SpringApplication.run(HelloApp.class, args); + } +} diff --git a/chapter-04/java/src/main/java/exercise3b/HelloController.java b/chapter-04/java/src/main/java/exercise3b/HelloController.java new file mode 100644 index 0000000..4d1db8e --- /dev/null +++ b/chapter-04/java/src/main/java/exercise3b/HelloController.java @@ -0,0 +1,77 @@ +package exercise3b; + +import java.util.LinkedHashMap; +import java.util.Map; +import java.util.Optional; + +import io.opentracing.Tracer; +import io.opentracing.Scope; +import io.opentracing.Span; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.PathVariable; +import org.springframework.web.bind.annotation.RestController; + +import lib.people.Person; +import lib.people.PersonRepository; + +@RestController +public class HelloController { + + @Autowired + private PersonRepository personRepository; + + @Autowired + private Tracer tracer; + + @GetMapping("/sayHello/{name}") + public String sayHello(@PathVariable String name) { + Span span = tracer.buildSpan("say-hello").start(); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + Person person = getPerson(name); + Map fields = new LinkedHashMap<>(); + fields.put("name", person.getName()); + fields.put("title", person.getTitle()); + fields.put("description", person.getDescription()); + span.log(fields); + + String response = formatGreeting(person); + span.setTag("response", response); + + return response; + } finally { + span.finish(); + } + } + + private Person getPerson(String name) { + Span span = tracer.buildSpan("get-person").start(); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + Optional personOpt = personRepository.findById(name); + if (personOpt.isPresent()) { + return personOpt.get(); + } + return new Person(name); + } finally { + span.finish(); + } + } + + private String formatGreeting(Person person) { + Span span = tracer.buildSpan("format-greeting").start(); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + String response = "Hello, "; + if (!person.getTitle().isEmpty()) { + response += person.getTitle() + " "; + } + response += person.getName() + "!"; + if (!person.getDescription().isEmpty()) { + response += " " + person.getDescription(); + } + return response; + } finally { + span.finish(); + } + } +} diff --git a/chapter-04/java/src/main/java/exercise4a/HelloApp.java b/chapter-04/java/src/main/java/exercise4a/HelloApp.java new file mode 100644 index 0000000..9c01d46 --- /dev/null +++ b/chapter-04/java/src/main/java/exercise4a/HelloApp.java @@ -0,0 +1,31 @@ +package exercise4a; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.boot.web.client.RestTemplateBuilder; +import org.springframework.context.annotation.Bean; +import org.springframework.web.client.RestTemplate; + +import io.jaegertracing.Configuration; +import io.jaegertracing.Configuration.ReporterConfiguration; +import io.jaegertracing.Configuration.SamplerConfiguration; + +@SpringBootApplication +public class HelloApp { + + @Bean + public RestTemplate restTemplate(RestTemplateBuilder restTemplateBuilder) { + return restTemplateBuilder.build(); + } + + @Bean + public io.opentracing.Tracer initTracer() { + SamplerConfiguration samplerConfig = new SamplerConfiguration().withType("const").withParam(1); + ReporterConfiguration reporterConfig = new ReporterConfiguration().withLogSpans(true); + return new Configuration("java-4-hello").withSampler(samplerConfig).withReporter(reporterConfig).getTracer(); + } + + public static void main(String[] args) { + SpringApplication.run(HelloApp.class, args); + } +} diff --git a/chapter-04/java/src/main/java/exercise4a/HelloController.java b/chapter-04/java/src/main/java/exercise4a/HelloController.java new file mode 100644 index 0000000..b4304aa --- /dev/null +++ b/chapter-04/java/src/main/java/exercise4a/HelloController.java @@ -0,0 +1,76 @@ +package exercise4a; + +import java.net.URI; +import java.util.Collections; +import java.util.LinkedHashMap; +import java.util.Map; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.http.ResponseEntity; +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.PathVariable; +import org.springframework.web.bind.annotation.RestController; +import org.springframework.web.client.RestTemplate; +import org.springframework.web.util.UriComponentsBuilder; + +import io.opentracing.Scope; +import io.opentracing.Span; +import io.opentracing.Tracer; +import lib.people.Person; + +@RestController +public class HelloController { + + @Autowired + private RestTemplate restTemplate; + + @Autowired + private Tracer tracer; + + @GetMapping("/sayHello/{name}") + public String sayHello(@PathVariable String name) { + Span span = tracer.buildSpan("say-hello").start(); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + Person person = getPerson(name); + Map fields = new LinkedHashMap<>(); + fields.put("name", person.getName()); + fields.put("title", person.getTitle()); + fields.put("description", person.getDescription()); + span.log(fields); + + String response = formatGreeting(person); + span.setTag("response", response); + + return response; + } finally { + span.finish(); + } + } + + private Person getPerson(String name) { + Span span = tracer.buildSpan("get-person").start(); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + String url = "http://localhost:8081/getPerson/" + name; + ResponseEntity response = restTemplate.getForEntity(url, Person.class); + return response.getBody(); + } finally { + span.finish(); + } + } + + private String formatGreeting(Person person) { + Span span = tracer.buildSpan("format-greeting").start(); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + URI uri = UriComponentsBuilder // + .fromHttpUrl("http://localhost:8082/formatGreeting") // + .queryParam("name", person.getName()) // + .queryParam("title", person.getTitle()) // + .queryParam("description", person.getDescription()) // + .build(Collections.emptyMap()); + ResponseEntity response = restTemplate.getForEntity(uri, String.class); + return response.getBody(); + } finally { + span.finish(); + } + } +} diff --git a/chapter-04/java/src/main/java/exercise4a/bigbrother/BBApp.java b/chapter-04/java/src/main/java/exercise4a/bigbrother/BBApp.java new file mode 100644 index 0000000..0b8003c --- /dev/null +++ b/chapter-04/java/src/main/java/exercise4a/bigbrother/BBApp.java @@ -0,0 +1,29 @@ +package exercise4a.bigbrother; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.boot.autoconfigure.domain.EntityScan; +import org.springframework.context.annotation.Bean; +import org.springframework.data.jpa.repository.config.EnableJpaRepositories; + +import io.jaegertracing.Configuration; +import io.jaegertracing.Configuration.ReporterConfiguration; +import io.jaegertracing.Configuration.SamplerConfiguration; + +@EnableJpaRepositories("lib.people") +@EntityScan("lib.people") +@SpringBootApplication +public class BBApp { + + @Bean + public io.opentracing.Tracer initTracer() { + SamplerConfiguration samplerConfig = new SamplerConfiguration().withType("const").withParam(1); + ReporterConfiguration reporterConfig = new ReporterConfiguration().withLogSpans(true); + return new Configuration("java-4-bigbrother").withSampler(samplerConfig).withReporter(reporterConfig).getTracer(); + } + + public static void main(String[] args) { + System.setProperty("server.port", "8081"); + SpringApplication.run(BBApp.class, args); + } +} diff --git a/chapter-04/java/src/main/java/exercise4a/bigbrother/BBController.java b/chapter-04/java/src/main/java/exercise4a/bigbrother/BBController.java new file mode 100644 index 0000000..9668efc --- /dev/null +++ b/chapter-04/java/src/main/java/exercise4a/bigbrother/BBController.java @@ -0,0 +1,56 @@ +package exercise4a.bigbrother; + +import java.util.LinkedHashMap; +import java.util.Map; +import java.util.Optional; + +import io.opentracing.Tracer; +import io.opentracing.Scope; +import io.opentracing.Span; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.PathVariable; +import org.springframework.web.bind.annotation.RestController; + +import lib.people.Person; +import lib.people.PersonRepository; + +@RestController +public class BBController { + + @Autowired + private PersonRepository personRepository; + + @Autowired + private Tracer tracer; + + @GetMapping("/getPerson/{name}") + public Person getPerson(@PathVariable String name) { + Span span = tracer.buildSpan("/getPerson").start(); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + Person person = loadPerson(name); + Map fields = new LinkedHashMap<>(); + fields.put("name", person.getName()); + fields.put("title", person.getTitle()); + fields.put("description", person.getDescription()); + span.log(fields); + return person; + } finally { + span.finish(); + } + } + + private Person loadPerson(String name) { + Span span = tracer.buildSpan("get-person").start(); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + Optional personOpt = personRepository.findById(name); + if (personOpt.isPresent()) { + return personOpt.get(); + } + return new Person(name); + } finally { + span.finish(); + } + } +} diff --git a/chapter-04/java/src/main/java/exercise4a/formatter/FApp.java b/chapter-04/java/src/main/java/exercise4a/formatter/FApp.java new file mode 100644 index 0000000..5af3726 --- /dev/null +++ b/chapter-04/java/src/main/java/exercise4a/formatter/FApp.java @@ -0,0 +1,25 @@ +package exercise4a.formatter; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.context.annotation.Bean; + +import io.jaegertracing.Configuration; +import io.jaegertracing.Configuration.ReporterConfiguration; +import io.jaegertracing.Configuration.SamplerConfiguration; + +@SpringBootApplication +public class FApp { + + @Bean + public io.opentracing.Tracer initTracer() { + SamplerConfiguration samplerConfig = new SamplerConfiguration().withType("const").withParam(1); + ReporterConfiguration reporterConfig = new ReporterConfiguration().withLogSpans(true); + return new Configuration("java-4-formatter").withSampler(samplerConfig).withReporter(reporterConfig).getTracer(); + } + + public static void main(String[] args) { + System.setProperty("server.port", "8082"); + SpringApplication.run(FApp.class, args); + } +} diff --git a/chapter-04/java/src/main/java/exercise4a/formatter/FController.java b/chapter-04/java/src/main/java/exercise4a/formatter/FController.java new file mode 100644 index 0000000..6fe1144 --- /dev/null +++ b/chapter-04/java/src/main/java/exercise4a/formatter/FController.java @@ -0,0 +1,36 @@ +package exercise4a.formatter; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.RequestParam; +import org.springframework.web.bind.annotation.RestController; + +import io.opentracing.Scope; +import io.opentracing.Span; +import io.opentracing.Tracer; + +@RestController +public class FController { + + @Autowired + private Tracer tracer; + + @GetMapping("/formatGreeting") + public String formatGreeting(@RequestParam String name, @RequestParam String title, + @RequestParam String description) { + Span span = tracer.buildSpan("/formatGreeting").start(); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + String response = "Hello, "; + if (!title.isEmpty()) { + response += title + " "; + } + response += name + "!"; + if (!description.isEmpty()) { + response += " " + description; + } + return response; + } finally { + span.finish(); + } + } +} diff --git a/chapter-04/java/src/main/java/exercise4b/HelloApp.java b/chapter-04/java/src/main/java/exercise4b/HelloApp.java new file mode 100644 index 0000000..f4db12f --- /dev/null +++ b/chapter-04/java/src/main/java/exercise4b/HelloApp.java @@ -0,0 +1,31 @@ +package exercise4b; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.boot.web.client.RestTemplateBuilder; +import org.springframework.context.annotation.Bean; +import org.springframework.web.client.RestTemplate; + +import io.jaegertracing.Configuration; +import io.jaegertracing.Configuration.ReporterConfiguration; +import io.jaegertracing.Configuration.SamplerConfiguration; + +@SpringBootApplication +public class HelloApp { + + @Bean + public RestTemplate restTemplate(RestTemplateBuilder restTemplateBuilder) { + return restTemplateBuilder.build(); + } + + @Bean + public io.opentracing.Tracer initTracer() { + SamplerConfiguration samplerConfig = new SamplerConfiguration().withType("const").withParam(1); + ReporterConfiguration reporterConfig = new ReporterConfiguration().withLogSpans(true); + return new Configuration("java-4-hello").withSampler(samplerConfig).withReporter(reporterConfig).getTracer(); + } + + public static void main(String[] args) { + SpringApplication.run(HelloApp.class, args); + } +} diff --git a/chapter-04/java/src/main/java/exercise4b/HelloController.java b/chapter-04/java/src/main/java/exercise4b/HelloController.java new file mode 100644 index 0000000..a61a19a --- /dev/null +++ b/chapter-04/java/src/main/java/exercise4b/HelloController.java @@ -0,0 +1,62 @@ +package exercise4b; + +import java.net.URI; +import java.util.Collections; +import java.util.LinkedHashMap; +import java.util.Map; + +import javax.servlet.http.HttpServletRequest; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.PathVariable; +import org.springframework.web.bind.annotation.RestController; +import org.springframework.web.client.RestTemplate; +import org.springframework.web.util.UriComponentsBuilder; + +import io.opentracing.Scope; +import io.opentracing.Span; +import lib.people.Person; + +@RestController +public class HelloController extends TracedController { + + @Autowired + private RestTemplate restTemplate; + + @GetMapping("/sayHello/{name}") + public String sayHello(@PathVariable String name, HttpServletRequest request) { + Span span = startServerSpan("/sayHello", request); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + Person person = getPerson(name); + Map fields = new LinkedHashMap<>(); + fields.put("name", person.getName()); + fields.put("title", person.getTitle()); + fields.put("description", person.getDescription()); + span.log(fields); + + String response = formatGreeting(person); + span.setTag("response", response); + + return response; + } finally { + span.finish(); + } + } + + private Person getPerson(String name) { + String url = "http://localhost:8081/getPerson/" + name; + URI uri = UriComponentsBuilder.fromHttpUrl(url).build(Collections.emptyMap()); + return get("get-person", uri, Person.class, restTemplate); + } + + private String formatGreeting(Person person) { + URI uri = UriComponentsBuilder // + .fromHttpUrl("http://localhost:8082/formatGreeting") // + .queryParam("name", person.getName()) // + .queryParam("title", person.getTitle()) // + .queryParam("description", person.getDescription()) // + .build(Collections.emptyMap()); + return get("format-greeting", uri, String.class, restTemplate); + } +} diff --git a/chapter-04/java/src/main/java/exercise4b/TracedController.java b/chapter-04/java/src/main/java/exercise4b/TracedController.java new file mode 100644 index 0000000..09b9881 --- /dev/null +++ b/chapter-04/java/src/main/java/exercise4b/TracedController.java @@ -0,0 +1,100 @@ +package exercise4b; + +import java.net.URI; +import java.util.Enumeration; +import java.util.Iterator; +import java.util.LinkedHashMap; +import java.util.Map; +import java.util.Map.Entry; + +import javax.servlet.http.HttpServletRequest; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.http.HttpEntity; +import org.springframework.http.HttpHeaders; +import org.springframework.http.HttpMethod; +import org.springframework.web.client.RestTemplate; + +import io.opentracing.Scope; +import io.opentracing.Span; +import io.opentracing.SpanContext; +import io.opentracing.Tracer; +import io.opentracing.propagation.Format; +import io.opentracing.propagation.TextMap; +import io.opentracing.tag.Tags; + +public class TracedController { + @Autowired + protected Tracer tracer; + + protected Span startServerSpan(String operationName, HttpServletRequest request) { + HttpServletRequestExtractAdapter carrier = new HttpServletRequestExtractAdapter(request); + SpanContext parent = tracer.extract(Format.Builtin.HTTP_HEADERS, carrier); + Span span = tracer.buildSpan(operationName).asChildOf(parent).start(); + Tags.SPAN_KIND.set(span, Tags.SPAN_KIND_SERVER); + return span; + } + + /** + * Execute HTTP GET request. + */ + protected T get(String operationName, URI uri, Class entityClass, RestTemplate restTemplate) { + Span span = tracer.buildSpan(operationName).start(); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + Tags.SPAN_KIND.set(span, Tags.SPAN_KIND_CLIENT); + Tags.HTTP_URL.set(span, uri.toString()); + Tags.HTTP_METHOD.set(span, "GET"); + + HttpHeaders headers = new HttpHeaders(); + HttpHeaderInjectAdapter carrier = new HttpHeaderInjectAdapter(headers); + tracer.inject(span.context(), Format.Builtin.HTTP_HEADERS, carrier); + HttpEntity entity = new HttpEntity<>(headers); + return restTemplate.exchange(uri, HttpMethod.GET, entity, entityClass).getBody(); + } finally { + span.finish(); + } + } + + private static class HttpServletRequestExtractAdapter implements TextMap { + private final Map headers; + + HttpServletRequestExtractAdapter(HttpServletRequest request) { + this.headers = new LinkedHashMap<>(); + Enumeration keys = request.getHeaderNames(); + while (keys.hasMoreElements()) { + String key = keys.nextElement(); + String value = request.getHeader(key); + headers.put(key, value); + } + } + + @Override + public Iterator> iterator() { + return headers.entrySet().iterator(); + } + + @Override + public void put(String key, String value) { + throw new UnsupportedOperationException(); + } + } + + private static class HttpHeaderInjectAdapter implements TextMap { + private final HttpHeaders headers; + + HttpHeaderInjectAdapter(HttpHeaders headers) { + this.headers = headers; + } + + @Override + public Iterator> iterator() { + throw new UnsupportedOperationException(); + } + + @Override + public void put(String key, String value) { + headers.set(key, value); + } + } + +} diff --git a/chapter-04/java/src/main/java/exercise4b/bigbrother/BBApp.java b/chapter-04/java/src/main/java/exercise4b/bigbrother/BBApp.java new file mode 100644 index 0000000..3f7cd49 --- /dev/null +++ b/chapter-04/java/src/main/java/exercise4b/bigbrother/BBApp.java @@ -0,0 +1,29 @@ +package exercise4b.bigbrother; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.boot.autoconfigure.domain.EntityScan; +import org.springframework.context.annotation.Bean; +import org.springframework.data.jpa.repository.config.EnableJpaRepositories; + +import io.jaegertracing.Configuration; +import io.jaegertracing.Configuration.ReporterConfiguration; +import io.jaegertracing.Configuration.SamplerConfiguration; + +@EnableJpaRepositories("lib.people") +@EntityScan("lib.people") +@SpringBootApplication +public class BBApp { + + @Bean + public io.opentracing.Tracer initTracer() { + SamplerConfiguration samplerConfig = new SamplerConfiguration().withType("const").withParam(1); + ReporterConfiguration reporterConfig = new ReporterConfiguration().withLogSpans(true); + return new Configuration("java-4-bigbrother").withSampler(samplerConfig).withReporter(reporterConfig).getTracer(); + } + + public static void main(String[] args) { + System.setProperty("server.port", "8081"); + SpringApplication.run(BBApp.class, args); + } +} diff --git a/chapter-04/java/src/main/java/exercise4b/bigbrother/BBController.java b/chapter-04/java/src/main/java/exercise4b/bigbrother/BBController.java new file mode 100644 index 0000000..0b8b5ed --- /dev/null +++ b/chapter-04/java/src/main/java/exercise4b/bigbrother/BBController.java @@ -0,0 +1,54 @@ +package exercise4b.bigbrother; + +import java.util.LinkedHashMap; +import java.util.Map; +import java.util.Optional; + +import javax.servlet.http.HttpServletRequest; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.PathVariable; +import org.springframework.web.bind.annotation.RestController; + +import exercise4b.TracedController; +import io.opentracing.Scope; +import io.opentracing.Span; +import lib.people.Person; +import lib.people.PersonRepository; + +@RestController +public class BBController extends TracedController { + + @Autowired + private PersonRepository personRepository; + + @GetMapping("/getPerson/{name}") + public Person getPerson(@PathVariable String name, HttpServletRequest request) { + Span span = startServerSpan("/getPerson", request); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + Person person = loadPerson(name); + Map fields = new LinkedHashMap<>(); + fields.put("name", person.getName()); + fields.put("title", person.getTitle()); + fields.put("description", person.getDescription()); + span.log(fields); + return person; + } finally { + span.finish(); + } + } + + private Person loadPerson(String name) { + Span span = tracer.buildSpan("get-person").start(); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + Optional personOpt = personRepository.findById(name); + if (personOpt.isPresent()) { + return personOpt.get(); + } + return new Person(name); + } finally { + span.finish(); + } + } +} diff --git a/chapter-04/java/src/main/java/exercise4b/formatter/FApp.java b/chapter-04/java/src/main/java/exercise4b/formatter/FApp.java new file mode 100644 index 0000000..8ffb30b --- /dev/null +++ b/chapter-04/java/src/main/java/exercise4b/formatter/FApp.java @@ -0,0 +1,25 @@ +package exercise4b.formatter; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.context.annotation.Bean; + +import io.jaegertracing.Configuration; +import io.jaegertracing.Configuration.ReporterConfiguration; +import io.jaegertracing.Configuration.SamplerConfiguration; + +@SpringBootApplication +public class FApp { + + @Bean + public io.opentracing.Tracer initTracer() { + SamplerConfiguration samplerConfig = new SamplerConfiguration().withType("const").withParam(1); + ReporterConfiguration reporterConfig = new ReporterConfiguration().withLogSpans(true); + return new Configuration("java-4-formatter").withSampler(samplerConfig).withReporter(reporterConfig).getTracer(); + } + + public static void main(String[] args) { + System.setProperty("server.port", "8082"); + SpringApplication.run(FApp.class, args); + } +} diff --git a/chapter-04/java/src/main/java/exercise4b/formatter/FController.java b/chapter-04/java/src/main/java/exercise4b/formatter/FController.java new file mode 100644 index 0000000..1c5e43b --- /dev/null +++ b/chapter-04/java/src/main/java/exercise4b/formatter/FController.java @@ -0,0 +1,34 @@ +package exercise4b.formatter; + +import javax.servlet.http.HttpServletRequest; + +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.RequestParam; +import org.springframework.web.bind.annotation.RestController; + +import exercise4b.TracedController; +import io.opentracing.Scope; +import io.opentracing.Span; + +@RestController +public class FController extends TracedController { + + @GetMapping("/formatGreeting") + public String formatGreeting(@RequestParam String name, @RequestParam String title, + @RequestParam String description, HttpServletRequest request) { + Span span = startServerSpan("/formatGreeting", request); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + String response = "Hello, "; + if (!title.isEmpty()) { + response += title + " "; + } + response += name + "!"; + if (!description.isEmpty()) { + response += " " + description; + } + return response; + } finally { + span.finish(); + } + } +} diff --git a/chapter-04/java/src/main/java/exercise5/HelloApp.java b/chapter-04/java/src/main/java/exercise5/HelloApp.java new file mode 100644 index 0000000..ee668e4 --- /dev/null +++ b/chapter-04/java/src/main/java/exercise5/HelloApp.java @@ -0,0 +1,31 @@ +package exercise5; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.boot.web.client.RestTemplateBuilder; +import org.springframework.context.annotation.Bean; +import org.springframework.web.client.RestTemplate; + +import io.jaegertracing.Configuration; +import io.jaegertracing.Configuration.ReporterConfiguration; +import io.jaegertracing.Configuration.SamplerConfiguration; + +@SpringBootApplication +public class HelloApp { + + @Bean + public RestTemplate restTemplate(RestTemplateBuilder restTemplateBuilder) { + return restTemplateBuilder.build(); + } + + @Bean + public io.opentracing.Tracer initTracer() { + SamplerConfiguration samplerConfig = new SamplerConfiguration().withType("const").withParam(1); + ReporterConfiguration reporterConfig = new ReporterConfiguration().withLogSpans(true); + return new Configuration("java-5-hello").withSampler(samplerConfig).withReporter(reporterConfig).getTracer(); + } + + public static void main(String[] args) { + SpringApplication.run(HelloApp.class, args); + } +} diff --git a/chapter-04/java/src/main/java/exercise5/HelloController.java b/chapter-04/java/src/main/java/exercise5/HelloController.java new file mode 100644 index 0000000..1c2bf8d --- /dev/null +++ b/chapter-04/java/src/main/java/exercise5/HelloController.java @@ -0,0 +1,62 @@ +package exercise5; + +import java.net.URI; +import java.util.Collections; +import java.util.LinkedHashMap; +import java.util.Map; + +import javax.servlet.http.HttpServletRequest; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.PathVariable; +import org.springframework.web.bind.annotation.RestController; +import org.springframework.web.client.RestTemplate; +import org.springframework.web.util.UriComponentsBuilder; + +import io.opentracing.Scope; +import io.opentracing.Span; +import lib.people.Person; + +@RestController +public class HelloController extends TracedController { + + @Autowired + private RestTemplate restTemplate; + + @GetMapping("/sayHello/{name}") + public String sayHello(@PathVariable String name, HttpServletRequest request) { + Span span = startServerSpan("/sayHello", request); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + Person person = getPerson(name); + Map fields = new LinkedHashMap<>(); + fields.put("name", person.getName()); + fields.put("title", person.getTitle()); + fields.put("description", person.getDescription()); + span.log(fields); + + String response = formatGreeting(person); + span.setTag("response", response); + + return response; + } finally { + span.finish(); + } + } + + private Person getPerson(String name) { + String url = "http://localhost:8081/getPerson/" + name; + URI uri = UriComponentsBuilder.fromHttpUrl(url).build(Collections.emptyMap()); + return get("get-person", uri, Person.class, restTemplate); + } + + private String formatGreeting(Person person) { + URI uri = UriComponentsBuilder // + .fromHttpUrl("http://localhost:8082/formatGreeting") // + .queryParam("name", person.getName()) // + .queryParam("title", person.getTitle()) // + .queryParam("description", person.getDescription()) // + .build(Collections.emptyMap()); + return get("format-greeting", uri, String.class, restTemplate); + } +} diff --git a/chapter-04/java/src/main/java/exercise5/TracedController.java b/chapter-04/java/src/main/java/exercise5/TracedController.java new file mode 100644 index 0000000..0759666 --- /dev/null +++ b/chapter-04/java/src/main/java/exercise5/TracedController.java @@ -0,0 +1,100 @@ +package exercise5; + +import java.net.URI; +import java.util.Enumeration; +import java.util.Iterator; +import java.util.LinkedHashMap; +import java.util.Map; +import java.util.Map.Entry; + +import javax.servlet.http.HttpServletRequest; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.http.HttpEntity; +import org.springframework.http.HttpHeaders; +import org.springframework.http.HttpMethod; +import org.springframework.web.client.RestTemplate; + +import io.opentracing.Scope; +import io.opentracing.Span; +import io.opentracing.SpanContext; +import io.opentracing.Tracer; +import io.opentracing.propagation.Format; +import io.opentracing.propagation.TextMap; +import io.opentracing.tag.Tags; + +public class TracedController { + @Autowired + protected Tracer tracer; + + protected Span startServerSpan(String operationName, HttpServletRequest request) { + HttpServletRequestExtractAdapter carrier = new HttpServletRequestExtractAdapter(request); + SpanContext parent = tracer.extract(Format.Builtin.HTTP_HEADERS, carrier); + Span span = tracer.buildSpan(operationName).asChildOf(parent).start(); + Tags.SPAN_KIND.set(span, Tags.SPAN_KIND_SERVER); + return span; + } + + /** + * Execute HTTP GET request. + */ + protected T get(String operationName, URI uri, Class entityClass, RestTemplate restTemplate) { + Span span = tracer.buildSpan(operationName).start(); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + Tags.SPAN_KIND.set(span, Tags.SPAN_KIND_CLIENT); + Tags.HTTP_URL.set(span, uri.toString()); + Tags.HTTP_METHOD.set(span, "GET"); + + HttpHeaders headers = new HttpHeaders(); + HttpHeaderInjectAdapter carrier = new HttpHeaderInjectAdapter(headers); + tracer.inject(span.context(), Format.Builtin.HTTP_HEADERS, carrier); + HttpEntity entity = new HttpEntity<>(headers); + return restTemplate.exchange(uri, HttpMethod.GET, entity, entityClass).getBody(); + } finally { + span.finish(); + } + } + + private static class HttpServletRequestExtractAdapter implements TextMap { + private final Map headers; + + HttpServletRequestExtractAdapter(HttpServletRequest request) { + this.headers = new LinkedHashMap<>(); + Enumeration keys = request.getHeaderNames(); + while (keys.hasMoreElements()) { + String key = keys.nextElement(); + String value = request.getHeader(key); + headers.put(key, value); + } + } + + @Override + public Iterator> iterator() { + return headers.entrySet().iterator(); + } + + @Override + public void put(String key, String value) { + throw new UnsupportedOperationException(); + } + } + + private static class HttpHeaderInjectAdapter implements TextMap { + private final HttpHeaders headers; + + HttpHeaderInjectAdapter(HttpHeaders headers) { + this.headers = headers; + } + + @Override + public Iterator> iterator() { + throw new UnsupportedOperationException(); + } + + @Override + public void put(String key, String value) { + headers.set(key, value); + } + } + +} diff --git a/chapter-04/java/src/main/java/exercise5/bigbrother/BBApp.java b/chapter-04/java/src/main/java/exercise5/bigbrother/BBApp.java new file mode 100644 index 0000000..187d606 --- /dev/null +++ b/chapter-04/java/src/main/java/exercise5/bigbrother/BBApp.java @@ -0,0 +1,29 @@ +package exercise5.bigbrother; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.boot.autoconfigure.domain.EntityScan; +import org.springframework.context.annotation.Bean; +import org.springframework.data.jpa.repository.config.EnableJpaRepositories; + +import io.jaegertracing.Configuration; +import io.jaegertracing.Configuration.ReporterConfiguration; +import io.jaegertracing.Configuration.SamplerConfiguration; + +@EnableJpaRepositories("lib.people") +@EntityScan("lib.people") +@SpringBootApplication +public class BBApp { + + @Bean + public io.opentracing.Tracer initTracer() { + SamplerConfiguration samplerConfig = new SamplerConfiguration().withType("const").withParam(1); + ReporterConfiguration reporterConfig = new ReporterConfiguration().withLogSpans(true); + return new Configuration("java-5-bigbrother").withSampler(samplerConfig).withReporter(reporterConfig).getTracer(); + } + + public static void main(String[] args) { + System.setProperty("server.port", "8081"); + SpringApplication.run(BBApp.class, args); + } +} diff --git a/chapter-04/java/src/main/java/exercise5/bigbrother/BBController.java b/chapter-04/java/src/main/java/exercise5/bigbrother/BBController.java new file mode 100644 index 0000000..d4e4e0a --- /dev/null +++ b/chapter-04/java/src/main/java/exercise5/bigbrother/BBController.java @@ -0,0 +1,54 @@ +package exercise5.bigbrother; + +import java.util.LinkedHashMap; +import java.util.Map; +import java.util.Optional; + +import javax.servlet.http.HttpServletRequest; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.PathVariable; +import org.springframework.web.bind.annotation.RestController; + +import exercise5.TracedController; +import io.opentracing.Scope; +import io.opentracing.Span; +import lib.people.Person; +import lib.people.PersonRepository; + +@RestController +public class BBController extends TracedController { + + @Autowired + private PersonRepository personRepository; + + @GetMapping("/getPerson/{name}") + public Person getPerson(@PathVariable String name, HttpServletRequest request) { + Span span = startServerSpan("/getPerson", request); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + Person person = loadPerson(name); + Map fields = new LinkedHashMap<>(); + fields.put("name", person.getName()); + fields.put("title", person.getTitle()); + fields.put("description", person.getDescription()); + span.log(fields); + return person; + } finally { + span.finish(); + } + } + + private Person loadPerson(String name) { + Span span = tracer.buildSpan("get-person").start(); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + Optional personOpt = personRepository.findById(name); + if (personOpt.isPresent()) { + return personOpt.get(); + } + return new Person(name); + } finally { + span.finish(); + } + } +} diff --git a/chapter-04/java/src/main/java/exercise5/formatter/FApp.java b/chapter-04/java/src/main/java/exercise5/formatter/FApp.java new file mode 100644 index 0000000..aaee52b --- /dev/null +++ b/chapter-04/java/src/main/java/exercise5/formatter/FApp.java @@ -0,0 +1,25 @@ +package exercise5.formatter; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.context.annotation.Bean; + +import io.jaegertracing.Configuration; +import io.jaegertracing.Configuration.ReporterConfiguration; +import io.jaegertracing.Configuration.SamplerConfiguration; + +@SpringBootApplication +public class FApp { + + @Bean + public io.opentracing.Tracer initTracer() { + SamplerConfiguration samplerConfig = new SamplerConfiguration().withType("const").withParam(1); + ReporterConfiguration reporterConfig = new ReporterConfiguration().withLogSpans(true); + return new Configuration("java-5-formatter").withSampler(samplerConfig).withReporter(reporterConfig).getTracer(); + } + + public static void main(String[] args) { + System.setProperty("server.port", "8082"); + SpringApplication.run(FApp.class, args); + } +} diff --git a/chapter-04/java/src/main/java/exercise5/formatter/FController.java b/chapter-04/java/src/main/java/exercise5/formatter/FController.java new file mode 100644 index 0000000..f92890b --- /dev/null +++ b/chapter-04/java/src/main/java/exercise5/formatter/FController.java @@ -0,0 +1,38 @@ +package exercise5.formatter; + +import javax.servlet.http.HttpServletRequest; + +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.RequestParam; +import org.springframework.web.bind.annotation.RestController; + +import exercise5.TracedController; +import io.opentracing.Scope; +import io.opentracing.Span; + +@RestController +public class FController extends TracedController { + + @GetMapping("/formatGreeting") + public String formatGreeting(@RequestParam String name, @RequestParam String title, + @RequestParam String description, HttpServletRequest request) { + Span span = startServerSpan("/formatGreeting", request); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + String greeting = tracer.activeSpan().getBaggageItem("greeting"); + if (greeting == null) { + greeting = "Hello"; + } + String response = greeting + ", "; + if (!title.isEmpty()) { + response += title + " "; + } + response += name + "!"; + if (!description.isEmpty()) { + response += " " + description; + } + return response; + } finally { + span.finish(); + } + } +} diff --git a/chapter-04/java/src/main/java/exercise6/HelloApp.java b/chapter-04/java/src/main/java/exercise6/HelloApp.java new file mode 100644 index 0000000..4b892fe --- /dev/null +++ b/chapter-04/java/src/main/java/exercise6/HelloApp.java @@ -0,0 +1,31 @@ +package exercise6; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.boot.web.client.RestTemplateBuilder; +import org.springframework.context.annotation.Bean; +import org.springframework.web.client.RestTemplate; + +import io.jaegertracing.Configuration; +import io.jaegertracing.Configuration.ReporterConfiguration; +import io.jaegertracing.Configuration.SamplerConfiguration; + +@SpringBootApplication +public class HelloApp { + + @Bean + public RestTemplate restTemplate(RestTemplateBuilder restTemplateBuilder) { + return restTemplateBuilder.build(); + } + + @Bean + public io.opentracing.Tracer initTracer() { + SamplerConfiguration samplerConfig = new SamplerConfiguration().withType("const").withParam(1); + ReporterConfiguration reporterConfig = new ReporterConfiguration().withLogSpans(true); + return new Configuration("java-6-hello").withSampler(samplerConfig).withReporter(reporterConfig).getTracer(); + } + + public static void main(String[] args) { + SpringApplication.run(HelloApp.class, args); + } +} diff --git a/chapter-04/java/src/main/java/exercise6/HelloController.java b/chapter-04/java/src/main/java/exercise6/HelloController.java new file mode 100644 index 0000000..996eadc --- /dev/null +++ b/chapter-04/java/src/main/java/exercise6/HelloController.java @@ -0,0 +1,61 @@ +package exercise6; + +import java.net.URI; +import java.util.Collections; +import java.util.LinkedHashMap; +import java.util.Map; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.http.ResponseEntity; +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.PathVariable; +import org.springframework.web.bind.annotation.RestController; +import org.springframework.web.client.RestTemplate; +import org.springframework.web.util.UriComponentsBuilder; + +import io.opentracing.Span; +import io.opentracing.Tracer; +import lib.people.Person; + +@RestController +public class HelloController { + + @Autowired + private RestTemplate restTemplate; + + @Autowired + private Tracer tracer; + + @GetMapping("/sayHello/{name}") + public String sayHello(@PathVariable String name) { + Span span = tracer.activeSpan(); + Person person = getPerson(name); + Map fields = new LinkedHashMap<>(); + fields.put("name", person.getName()); + fields.put("title", person.getTitle()); + fields.put("description", person.getDescription()); + span.log(fields); + + String response = formatGreeting(person); + span.setTag("response", response); + + return response; + } + + private Person getPerson(String name) { + String url = "http://localhost:8081/getPerson/" + name; + ResponseEntity response = restTemplate.getForEntity(url, Person.class); + return response.getBody(); + } + + private String formatGreeting(Person person) { + URI uri = UriComponentsBuilder // + .fromHttpUrl("http://localhost:8082/formatGreeting") // + .queryParam("name", person.getName()) // + .queryParam("title", person.getTitle()) // + .queryParam("description", person.getDescription()) // + .build(Collections.emptyMap()); + ResponseEntity response = restTemplate.getForEntity(uri, String.class); + return response.getBody(); + } +} diff --git a/chapter-04/java/src/main/java/exercise6/bigbrother/BBApp.java b/chapter-04/java/src/main/java/exercise6/bigbrother/BBApp.java new file mode 100644 index 0000000..4396939 --- /dev/null +++ b/chapter-04/java/src/main/java/exercise6/bigbrother/BBApp.java @@ -0,0 +1,29 @@ +package exercise6.bigbrother; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.boot.autoconfigure.domain.EntityScan; +import org.springframework.context.annotation.Bean; +import org.springframework.data.jpa.repository.config.EnableJpaRepositories; + +import io.jaegertracing.Configuration; +import io.jaegertracing.Configuration.ReporterConfiguration; +import io.jaegertracing.Configuration.SamplerConfiguration; + +@EnableJpaRepositories("lib.people") +@EntityScan("lib.people") +@SpringBootApplication +public class BBApp { + + @Bean + public io.opentracing.Tracer initTracer() { + SamplerConfiguration samplerConfig = new SamplerConfiguration().withType("const").withParam(1); + ReporterConfiguration reporterConfig = new ReporterConfiguration().withLogSpans(true); + return new Configuration("java-6-bigbrother").withSampler(samplerConfig).withReporter(reporterConfig).getTracer(); + } + + public static void main(String[] args) { + System.setProperty("server.port", "8081"); + SpringApplication.run(BBApp.class, args); + } +} diff --git a/chapter-04/java/src/main/java/exercise6/bigbrother/BBController.java b/chapter-04/java/src/main/java/exercise6/bigbrother/BBController.java new file mode 100644 index 0000000..0631076 --- /dev/null +++ b/chapter-04/java/src/main/java/exercise6/bigbrother/BBController.java @@ -0,0 +1,51 @@ +package exercise6.bigbrother; + +import java.util.LinkedHashMap; +import java.util.Map; +import java.util.Optional; + +import io.opentracing.Tracer; +import io.opentracing.Scope; +import io.opentracing.Span; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.PathVariable; +import org.springframework.web.bind.annotation.RestController; + +import lib.people.Person; +import lib.people.PersonRepository; + +@RestController +public class BBController { + + @Autowired + private PersonRepository personRepository; + + @Autowired + private Tracer tracer; + + @GetMapping("/getPerson/{name}") + public Person getPerson(@PathVariable String name) { + Person person = loadPerson(name); + Map fields = new LinkedHashMap<>(); + fields.put("name", person.getName()); + fields.put("title", person.getTitle()); + fields.put("description", person.getDescription()); + tracer.activeSpan().log(fields); + return person; + } + + private Person loadPerson(String name) { + Span span = tracer.buildSpan("get-person").start(); + try (Scope scope = tracer.scopeManager().activate(span, false)) { + Optional personOpt = personRepository.findById(name); + if (personOpt.isPresent()) { + return personOpt.get(); + } + return new Person(name); + } finally { + span.finish(); + } + } +} diff --git a/chapter-04/java/src/main/java/exercise6/formatter/FApp.java b/chapter-04/java/src/main/java/exercise6/formatter/FApp.java new file mode 100644 index 0000000..fa03619 --- /dev/null +++ b/chapter-04/java/src/main/java/exercise6/formatter/FApp.java @@ -0,0 +1,25 @@ +package exercise6.formatter; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.context.annotation.Bean; + +import io.jaegertracing.Configuration; +import io.jaegertracing.Configuration.ReporterConfiguration; +import io.jaegertracing.Configuration.SamplerConfiguration; + +@SpringBootApplication +public class FApp { + + @Bean + public io.opentracing.Tracer initTracer() { + SamplerConfiguration samplerConfig = new SamplerConfiguration().withType("const").withParam(1); + ReporterConfiguration reporterConfig = new ReporterConfiguration().withLogSpans(true); + return new Configuration("java-6-formatter").withSampler(samplerConfig).withReporter(reporterConfig).getTracer(); + } + + public static void main(String[] args) { + System.setProperty("server.port", "8082"); + SpringApplication.run(FApp.class, args); + } +} diff --git a/chapter-04/java/src/main/java/exercise6/formatter/FController.java b/chapter-04/java/src/main/java/exercise6/formatter/FController.java new file mode 100644 index 0000000..2750248 --- /dev/null +++ b/chapter-04/java/src/main/java/exercise6/formatter/FController.java @@ -0,0 +1,23 @@ +package exercise6.formatter; + +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.RequestParam; +import org.springframework.web.bind.annotation.RestController; + +@RestController +public class FController { + + @GetMapping("/formatGreeting") + public String formatGreeting(@RequestParam String name, @RequestParam String title, + @RequestParam String description) { + String response = "Hello, "; + if (!title.isEmpty()) { + response += title + " "; + } + response += name + "!"; + if (!description.isEmpty()) { + response += " " + description; + } + return response; + } +} diff --git a/chapter-04/java/src/main/java/lib/people/Person.java b/chapter-04/java/src/main/java/lib/people/Person.java new file mode 100644 index 0000000..e26ebe1 --- /dev/null +++ b/chapter-04/java/src/main/java/lib/people/Person.java @@ -0,0 +1,46 @@ +package lib.people; + +import javax.persistence.Column; +import javax.persistence.Entity; +import javax.persistence.Id; +import javax.persistence.Table; + +@Entity +@Table(name = "people") +public class Person { + @Id + private String name; + + @Column(nullable = false) + private String title; + + @Column(nullable = false) + private String description; + + public Person() {} + + public Person(String name) { + this.name = name; + } + + /** + * @return the name + */ + public String getName() { + return name; + } + + /** + * @return the title + */ + public String getTitle() { + return title; + } + + /** + * @return the description + */ + public String getDescription() { + return description; + } +} diff --git a/chapter-04/java/src/main/java/lib/people/PersonRepository.java b/chapter-04/java/src/main/java/lib/people/PersonRepository.java new file mode 100644 index 0000000..7914f77 --- /dev/null +++ b/chapter-04/java/src/main/java/lib/people/PersonRepository.java @@ -0,0 +1,6 @@ +package lib.people; + +import org.springframework.data.repository.CrudRepository; + +public interface PersonRepository extends CrudRepository { +} diff --git a/chapter-04/java/src/main/resources/application.properties b/chapter-04/java/src/main/resources/application.properties new file mode 100644 index 0000000..8b12676 --- /dev/null +++ b/chapter-04/java/src/main/resources/application.properties @@ -0,0 +1,4 @@ +spring.jpa.hibernate.ddl-auto=none +spring.datasource.url=jdbc:mysql://localhost:3306/chapter04 +spring.datasource.username=root +spring.datasource.password=mysqlpwd diff --git a/chapter-04/python/.gitignore b/chapter-04/python/.gitignore new file mode 100644 index 0000000..3c188e7 --- /dev/null +++ b/chapter-04/python/.gitignore @@ -0,0 +1,3 @@ +env/ +*.pyc +__pycache__/ diff --git a/chapter-04/python/exercise1/__init__.py b/chapter-04/python/exercise1/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/chapter-04/python/exercise1/database.py b/chapter-04/python/exercise1/database.py new file mode 100644 index 0000000..e1310e6 --- /dev/null +++ b/chapter-04/python/exercise1/database.py @@ -0,0 +1,23 @@ +from sqlalchemy import create_engine +from sqlalchemy.ext.declarative import declarative_base +from sqlalchemy.orm import sessionmaker +from sqlalchemy.schema import Column +from sqlalchemy.types import String + + +db_url = 'mysql+pymysql://root:mysqlpwd@localhost:3306/chapter04' +engine = create_engine(db_url, echo=False) +Session = sessionmaker(bind=engine) +session = Session() +Base = declarative_base() + + +class Person(Base): + __tablename__ = 'people' + name = Column(String, primary_key=True) + title = Column(String) + description = Column(String) + + @staticmethod + def get(name): + return session.query(Person).get(name) diff --git a/chapter-04/python/exercise1/hello.py b/chapter-04/python/exercise1/hello.py new file mode 100644 index 0000000..bceeb82 --- /dev/null +++ b/chapter-04/python/exercise1/hello.py @@ -0,0 +1,38 @@ +from flask import Flask +from .database import Person + + +app = Flask('py-1-hello') + + +@app.route("/sayHello/") +def say_hello(name): + person = get_person(name) + resp = format_greeting( + name=person.name, + title=person.title, + description=person.description, + ) + return resp + + +def get_person(name): + person = Person.get(name) + if person is None: + person = Person() + person.name = name + return person + + +def format_greeting(name, title, description): + greeting = 'Hello, ' + if title: + greeting += title + ' ' + greeting += name + '!' + if description: + greeting += ' ' + description + return greeting + + +if __name__ == "__main__": + app.run(port=8080) diff --git a/chapter-04/python/exercise2/__init__.py b/chapter-04/python/exercise2/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/chapter-04/python/exercise2/database.py b/chapter-04/python/exercise2/database.py new file mode 100644 index 0000000..e1310e6 --- /dev/null +++ b/chapter-04/python/exercise2/database.py @@ -0,0 +1,23 @@ +from sqlalchemy import create_engine +from sqlalchemy.ext.declarative import declarative_base +from sqlalchemy.orm import sessionmaker +from sqlalchemy.schema import Column +from sqlalchemy.types import String + + +db_url = 'mysql+pymysql://root:mysqlpwd@localhost:3306/chapter04' +engine = create_engine(db_url, echo=False) +Session = sessionmaker(bind=engine) +session = Session() +Base = declarative_base() + + +class Person(Base): + __tablename__ = 'people' + name = Column(String, primary_key=True) + title = Column(String) + description = Column(String) + + @staticmethod + def get(name): + return session.query(Person).get(name) diff --git a/chapter-04/python/exercise2/hello.py b/chapter-04/python/exercise2/hello.py new file mode 100644 index 0000000..e5646c4 --- /dev/null +++ b/chapter-04/python/exercise2/hello.py @@ -0,0 +1,48 @@ +from flask import Flask +from .database import Person +from lib.tracing import init_tracer +import opentracing + + +app = Flask('py-2-hello') +init_tracer('py-2-hello') + + +@app.route("/sayHello/") +def say_hello(name): + with opentracing.tracer.start_span('say-hello') as span: + person = get_person(name, span) + resp = format_greeting( + name=person.name, + title=person.title, + description=person.description, + ) + span.set_tag('response', resp) + return resp + + +def get_person(name, span): + person = Person.get(name) + if person is None: + person = Person() + person.name = name + span.log_kv({ + 'name': person.name, + 'title': person.title, + 'description': person.description, + }) + return person + + +def format_greeting(name, title, description): + greeting = 'Hello, ' + if title: + greeting += title + ' ' + greeting += name + '!' + if description: + greeting += ' ' + description + return greeting + + +if __name__ == "__main__": + app.run(port=8080) diff --git a/chapter-04/python/exercise3a/__init__.py b/chapter-04/python/exercise3a/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/chapter-04/python/exercise3a/database.py b/chapter-04/python/exercise3a/database.py new file mode 100644 index 0000000..e1310e6 --- /dev/null +++ b/chapter-04/python/exercise3a/database.py @@ -0,0 +1,23 @@ +from sqlalchemy import create_engine +from sqlalchemy.ext.declarative import declarative_base +from sqlalchemy.orm import sessionmaker +from sqlalchemy.schema import Column +from sqlalchemy.types import String + + +db_url = 'mysql+pymysql://root:mysqlpwd@localhost:3306/chapter04' +engine = create_engine(db_url, echo=False) +Session = sessionmaker(bind=engine) +session = Session() +Base = declarative_base() + + +class Person(Base): + __tablename__ = 'people' + name = Column(String, primary_key=True) + title = Column(String) + description = Column(String) + + @staticmethod + def get(name): + return session.query(Person).get(name) diff --git a/chapter-04/python/exercise3a/hello.py b/chapter-04/python/exercise3a/hello.py new file mode 100644 index 0000000..95b489a --- /dev/null +++ b/chapter-04/python/exercise3a/hello.py @@ -0,0 +1,55 @@ +from flask import Flask +from .database import Person +from lib.tracing import init_tracer +import opentracing + + +app = Flask('py-3-hello') +init_tracer('py-3-hello') + + +@app.route("/sayHello/") +def say_hello(name): + with opentracing.tracer.start_span('say-hello') as span: + person = get_person(name, span) + resp = format_greeting( + name=person.name, + title=person.title, + description=person.description, + span=span, + ) + span.set_tag('response', resp) + return resp + + +def get_person(name, span): + with opentracing.tracer.start_span( + 'get-person', child_of=span, + ) as span: + person = Person.get(name) + if person is None: + person = Person() + person.name = name + span.log_kv({ + 'name': person.name, + 'title': person.title, + 'description': person.description, + }) + return person + + +def format_greeting(name, title, description, span): + with opentracing.tracer.start_span( + 'format-greeting', child_of=span, + ): + greeting = 'Hello, ' + if title: + greeting += title + ' ' + greeting += name + '!' + if description: + greeting += ' ' + description + return greeting + + +if __name__ == "__main__": + app.run(port=8080) diff --git a/chapter-04/python/exercise3b/__init__.py b/chapter-04/python/exercise3b/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/chapter-04/python/exercise3b/database.py b/chapter-04/python/exercise3b/database.py new file mode 100644 index 0000000..e1310e6 --- /dev/null +++ b/chapter-04/python/exercise3b/database.py @@ -0,0 +1,23 @@ +from sqlalchemy import create_engine +from sqlalchemy.ext.declarative import declarative_base +from sqlalchemy.orm import sessionmaker +from sqlalchemy.schema import Column +from sqlalchemy.types import String + + +db_url = 'mysql+pymysql://root:mysqlpwd@localhost:3306/chapter04' +engine = create_engine(db_url, echo=False) +Session = sessionmaker(bind=engine) +session = Session() +Base = declarative_base() + + +class Person(Base): + __tablename__ = 'people' + name = Column(String, primary_key=True) + title = Column(String) + description = Column(String) + + @staticmethod + def get(name): + return session.query(Person).get(name) diff --git a/chapter-04/python/exercise3b/hello.py b/chapter-04/python/exercise3b/hello.py new file mode 100644 index 0000000..bd95a51 --- /dev/null +++ b/chapter-04/python/exercise3b/hello.py @@ -0,0 +1,54 @@ +from flask import Flask +from .database import Person +from lib.tracing import init_tracer +import opentracing + + +app = Flask('py-3-hello') +init_tracer('py-3-hello') + + +@app.route("/sayHello/") +def say_hello(name): + with opentracing.tracer.start_active_span('say-hello') as scope: + person = get_person(name) + resp = format_greeting( + name=person.name, + title=person.title, + description=person.description, + ) + scope.span.set_tag('response', resp) + return resp + + +def get_person(name): + with opentracing.tracer.start_active_span( + 'get-person', + ) as scope: + person = Person.get(name) + if person is None: + person = Person() + person.name = name + scope.span.log_kv({ + 'name': person.name, + 'title': person.title, + 'description': person.description, + }) + return person + + +def format_greeting(name, title, description): + with opentracing.tracer.start_active_span( + 'format-greeting', + ): + greeting = 'Hello, ' + if title: + greeting += title + ' ' + greeting += name + '!' + if description: + greeting += ' ' + description + return greeting + + +if __name__ == "__main__": + app.run(port=8080) diff --git a/chapter-04/python/exercise4a/__init__.py b/chapter-04/python/exercise4a/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/chapter-04/python/exercise4a/bigbrother.py b/chapter-04/python/exercise4a/bigbrother.py new file mode 100644 index 0000000..d83248b --- /dev/null +++ b/chapter-04/python/exercise4a/bigbrother.py @@ -0,0 +1,32 @@ +from flask import Flask +import json +from .database import Person +from lib.tracing import init_tracer +import opentracing + + +app = Flask('py-4-bigbrother') +init_tracer('py-4-bigbrother') + + +@app.route("/getPerson/") +def get_person_http(name): + with opentracing.tracer.start_active_span('/getPerson') as scope: + person = Person.get(name) + if person is None: + person = Person() + person.name = name + scope.span.log_kv({ + 'name': person.name, + 'title': person.title, + 'description': person.description, + }) + return json.dumps({ + 'name': person.name, + 'title': person.title, + 'description': person.description, + }) + + +if __name__ == "__main__": + app.run(port=8081) diff --git a/chapter-04/python/exercise4a/database.py b/chapter-04/python/exercise4a/database.py new file mode 100644 index 0000000..e1310e6 --- /dev/null +++ b/chapter-04/python/exercise4a/database.py @@ -0,0 +1,23 @@ +from sqlalchemy import create_engine +from sqlalchemy.ext.declarative import declarative_base +from sqlalchemy.orm import sessionmaker +from sqlalchemy.schema import Column +from sqlalchemy.types import String + + +db_url = 'mysql+pymysql://root:mysqlpwd@localhost:3306/chapter04' +engine = create_engine(db_url, echo=False) +Session = sessionmaker(bind=engine) +session = Session() +Base = declarative_base() + + +class Person(Base): + __tablename__ = 'people' + name = Column(String, primary_key=True) + title = Column(String) + description = Column(String) + + @staticmethod + def get(name): + return session.query(Person).get(name) diff --git a/chapter-04/python/exercise4a/formatter.py b/chapter-04/python/exercise4a/formatter.py new file mode 100644 index 0000000..edfb2c1 --- /dev/null +++ b/chapter-04/python/exercise4a/formatter.py @@ -0,0 +1,38 @@ +from flask import Flask +from flask import request +from lib.tracing import init_tracer +import opentracing + + +app = Flask('py-4-formatter') +init_tracer('py-4-formatter') + + +@app.route("/formatGreeting") +def handle_format_greeting(): + with opentracing.tracer.start_active_span('/formatGreeting') as scope: + name = request.args.get('name') + title = request.args.get('title') + descr = request.args.get('description') + return format_greeting( + name=name, + title=title, + description=descr, + ) + + +def format_greeting(name, title, description): + with opentracing.tracer.start_active_span( + 'format-greeting', + ): + greeting = 'Hello, ' + if title: + greeting += title + ' ' + greeting += name + '!' + if description: + greeting += ' ' + description + return greeting + + +if __name__ == "__main__": + app.run(port=8082) diff --git a/chapter-04/python/exercise4a/hello.py b/chapter-04/python/exercise4a/hello.py new file mode 100644 index 0000000..a0235be --- /dev/null +++ b/chapter-04/python/exercise4a/hello.py @@ -0,0 +1,48 @@ +import json +import requests +import opentracing +from flask import Flask +from lib.tracing import init_tracer + + +app = Flask('py-4-hello') +init_tracer('py-4-hello') + + +@app.route("/sayHello/") +def say_hello(name): + with opentracing.tracer.start_active_span('say-hello') as scope: + person = get_person(name) + resp = format_greeting(person) + scope.span.set_tag('response', resp) + return resp + + +def get_person(name): + with opentracing.tracer.start_active_span( + 'get-person', + ) as scope: + url = 'http://localhost:8081/getPerson/%s' % name + r = requests.get(url) + assert r.status_code == 200 + person = json.loads(r.text) + scope.span.log_kv({ + 'name': person['name'], + 'title': person['title'], + 'description': person['description'], + }) + return person + + +def format_greeting(person): + with opentracing.tracer.start_active_span( + 'format-greeting', + ): + url = 'http://localhost:8082/formatGreeting' + r = requests.get(url, params=person) + assert r.status_code == 200 + return r.text + + +if __name__ == "__main__": + app.run(port=8080) diff --git a/chapter-04/python/exercise4b/__init__.py b/chapter-04/python/exercise4b/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/chapter-04/python/exercise4b/bigbrother.py b/chapter-04/python/exercise4b/bigbrother.py new file mode 100644 index 0000000..a630fd6 --- /dev/null +++ b/chapter-04/python/exercise4b/bigbrother.py @@ -0,0 +1,42 @@ +from flask import Flask +from flask import request +import json +from .database import Person +from lib.tracing import init_tracer +import opentracing +from opentracing.ext import tags + + +app = Flask('py-4-bigbrother') +init_tracer('py-4-bigbrother') + + +@app.route("/getPerson/") +def get_person_http(name): + span_ctx = opentracing.tracer.extract( + opentracing.Format.HTTP_HEADERS, + request.headers, + ) + with opentracing.tracer.start_active_span( + '/getPerson', + child_of=span_ctx, + tags={tags.SPAN_KIND: tags.SPAN_KIND_RPC_SERVER}, + ) as scope: + person = Person.get(name) + if person is None: + person = Person() + person.name = name + scope.span.log_kv({ + 'name': person.name, + 'title': person.title, + 'description': person.description, + }) + return json.dumps({ + 'name': person.name, + 'title': person.title, + 'description': person.description, + }) + + +if __name__ == "__main__": + app.run(port=8081) diff --git a/chapter-04/python/exercise4b/database.py b/chapter-04/python/exercise4b/database.py new file mode 100644 index 0000000..e1310e6 --- /dev/null +++ b/chapter-04/python/exercise4b/database.py @@ -0,0 +1,23 @@ +from sqlalchemy import create_engine +from sqlalchemy.ext.declarative import declarative_base +from sqlalchemy.orm import sessionmaker +from sqlalchemy.schema import Column +from sqlalchemy.types import String + + +db_url = 'mysql+pymysql://root:mysqlpwd@localhost:3306/chapter04' +engine = create_engine(db_url, echo=False) +Session = sessionmaker(bind=engine) +session = Session() +Base = declarative_base() + + +class Person(Base): + __tablename__ = 'people' + name = Column(String, primary_key=True) + title = Column(String) + description = Column(String) + + @staticmethod + def get(name): + return session.query(Person).get(name) diff --git a/chapter-04/python/exercise4b/formatter.py b/chapter-04/python/exercise4b/formatter.py new file mode 100644 index 0000000..2072597 --- /dev/null +++ b/chapter-04/python/exercise4b/formatter.py @@ -0,0 +1,47 @@ +from flask import Flask +from flask import request +from lib.tracing import init_tracer +import opentracing +from opentracing.ext import tags + + +app = Flask('py-4-formatter') +init_tracer('py-4-formatter') + + +@app.route("/formatGreeting") +def handle_format_greeting(): + span_ctx = opentracing.tracer.extract( + opentracing.Format.HTTP_HEADERS, + request.headers, + ) + with opentracing.tracer.start_active_span( + '/formatGreeting', + child_of=span_ctx, + tags={tags.SPAN_KIND: tags.SPAN_KIND_RPC_SERVER}, + ) as scope: + name = request.args.get('name') + title = request.args.get('title') + descr = request.args.get('description') + return format_greeting( + name=name, + title=title, + description=descr, + ) + + +def format_greeting(name, title, description): + with opentracing.tracer.start_active_span( + 'format-greeting', + ): + greeting = 'Hello, ' + if title: + greeting += title + ' ' + greeting += name + '!' + if description: + greeting += ' ' + description + return greeting + + +if __name__ == "__main__": + app.run(port=8082) diff --git a/chapter-04/python/exercise4b/hello.py b/chapter-04/python/exercise4b/hello.py new file mode 100644 index 0000000..59d207f --- /dev/null +++ b/chapter-04/python/exercise4b/hello.py @@ -0,0 +1,71 @@ +import json +import requests +from flask import Flask +from flask import request +from lib.tracing import init_tracer +import opentracing +from opentracing.ext import tags + + +app = Flask('py-4-hello') +init_tracer('py-4-hello') + + +@app.route("/sayHello/") +def say_hello(name): + span_ctx = opentracing.tracer.extract( + opentracing.Format.HTTP_HEADERS, + request.headers, + ) + with opentracing.tracer.start_active_span( + 'say-hello', + child_of=span_ctx, + tags={tags.SPAN_KIND: tags.SPAN_KIND_RPC_SERVER}, + ) as scope: + person = get_person(name) + resp = format_greeting(person) + scope.span.set_tag('response', resp) + return resp + + +def get_person(name): + with opentracing.tracer.start_active_span( + 'get-person', + ) as scope: + url = 'http://localhost:8081/getPerson/%s' % name + res = _get(url) + person = json.loads(res) + scope.span.log_kv({ + 'name': person['name'], + 'title': person['title'], + 'description': person['description'], + }) + return person + + +def format_greeting(person): + with opentracing.tracer.start_active_span( + 'format-greeting', + ): + url = 'http://localhost:8082/formatGreeting' + return _get(url, params=person) + + +def _get(url, params=None): + span = opentracing.tracer.active_span + span.set_tag(tags.HTTP_URL, url) + span.set_tag(tags.HTTP_METHOD, 'GET') + span.set_tag(tags.SPAN_KIND, tags.SPAN_KIND_RPC_CLIENT) + headers = {} + opentracing.tracer.inject( + span.context, + opentracing.Format.HTTP_HEADERS, + headers, + ) + r = requests.get(url, params=params, headers=headers) + assert r.status_code == 200 + return r.text + + +if __name__ == "__main__": + app.run(port=8080) diff --git a/chapter-04/python/exercise5/__init__.py b/chapter-04/python/exercise5/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/chapter-04/python/exercise5/bigbrother.py b/chapter-04/python/exercise5/bigbrother.py new file mode 100644 index 0000000..6689180 --- /dev/null +++ b/chapter-04/python/exercise5/bigbrother.py @@ -0,0 +1,42 @@ +from flask import Flask +from flask import request +import json +from .database import Person +from lib.tracing import init_tracer +import opentracing +from opentracing.ext import tags + + +app = Flask('py-5-bigbrother') +init_tracer('py-5-bigbrother') + + +@app.route("/getPerson/") +def get_person_http(name): + span_ctx = opentracing.tracer.extract( + opentracing.Format.HTTP_HEADERS, + request.headers, + ) + with opentracing.tracer.start_active_span( + '/getPerson', + child_of=span_ctx, + tags={tags.SPAN_KIND: tags.SPAN_KIND_RPC_SERVER}, + ) as scope: + person = Person.get(name) + if person is None: + person = Person() + person.name = name + scope.span.log_kv({ + 'name': person.name, + 'title': person.title, + 'description': person.description, + }) + return json.dumps({ + 'name': person.name, + 'title': person.title, + 'description': person.description, + }) + + +if __name__ == "__main__": + app.run(port=8081) diff --git a/chapter-04/python/exercise5/database.py b/chapter-04/python/exercise5/database.py new file mode 100644 index 0000000..e1310e6 --- /dev/null +++ b/chapter-04/python/exercise5/database.py @@ -0,0 +1,23 @@ +from sqlalchemy import create_engine +from sqlalchemy.ext.declarative import declarative_base +from sqlalchemy.orm import sessionmaker +from sqlalchemy.schema import Column +from sqlalchemy.types import String + + +db_url = 'mysql+pymysql://root:mysqlpwd@localhost:3306/chapter04' +engine = create_engine(db_url, echo=False) +Session = sessionmaker(bind=engine) +session = Session() +Base = declarative_base() + + +class Person(Base): + __tablename__ = 'people' + name = Column(String, primary_key=True) + title = Column(String) + description = Column(String) + + @staticmethod + def get(name): + return session.query(Person).get(name) diff --git a/chapter-04/python/exercise5/formatter.py b/chapter-04/python/exercise5/formatter.py new file mode 100644 index 0000000..b1d5170 --- /dev/null +++ b/chapter-04/python/exercise5/formatter.py @@ -0,0 +1,48 @@ +from flask import Flask +from flask import request +from lib.tracing import init_tracer +import opentracing +from opentracing.ext import tags + + +app = Flask('py-5-formatter') +init_tracer('py-5-formatter') + + +@app.route("/formatGreeting") +def handle_format_greeting(): + span_ctx = opentracing.tracer.extract( + opentracing.Format.HTTP_HEADERS, + request.headers, + ) + with opentracing.tracer.start_active_span( + '/formatGreeting', + child_of=span_ctx, + tags={tags.SPAN_KIND: tags.SPAN_KIND_RPC_SERVER}, + ) as scope: + name = request.args.get('name') + title = request.args.get('title') + descr = request.args.get('description') + return format_greeting( + name=name, + title=title, + description=descr, + ) + + +def format_greeting(name, title, description): + with opentracing.tracer.start_active_span( + 'format-greeting', + ) as scope: + greeting = scope.span.get_baggage_item('greeting') or 'Hello' + greeting += ', ' + if title: + greeting += title + ' ' + greeting += name + '!' + if description: + greeting += ' ' + description + return greeting + + +if __name__ == "__main__": + app.run(port=8082) diff --git a/chapter-04/python/exercise5/hello.py b/chapter-04/python/exercise5/hello.py new file mode 100644 index 0000000..313a66d --- /dev/null +++ b/chapter-04/python/exercise5/hello.py @@ -0,0 +1,71 @@ +import json +import requests +from flask import Flask +from flask import request +from lib.tracing import init_tracer +import opentracing +from opentracing.ext import tags + + +app = Flask('py-5-hello') +init_tracer('py-5-hello') + + +@app.route("/sayHello/") +def say_hello(name): + span_ctx = opentracing.tracer.extract( + opentracing.Format.HTTP_HEADERS, + request.headers, + ) + with opentracing.tracer.start_active_span( + 'say-hello', + child_of=span_ctx, + tags={tags.SPAN_KIND: tags.SPAN_KIND_RPC_SERVER}, + ) as scope: + person = get_person(name) + resp = format_greeting(person) + scope.span.set_tag('response', resp) + return resp + + +def get_person(name): + with opentracing.tracer.start_active_span( + 'get-person', + ) as scope: + url = 'http://localhost:8081/getPerson/%s' % name + res = _get(url) + person = json.loads(res) + scope.span.log_kv({ + 'name': person['name'], + 'title': person['title'], + 'description': person['description'], + }) + return person + + +def format_greeting(person): + with opentracing.tracer.start_active_span( + 'format-greeting', + ): + url = 'http://localhost:8082/formatGreeting' + return _get(url, params=person) + + +def _get(url, params=None): + span = opentracing.tracer.active_span + span.set_tag(tags.HTTP_URL, url) + span.set_tag(tags.HTTP_METHOD, 'GET') + span.set_tag(tags.SPAN_KIND, tags.SPAN_KIND_RPC_CLIENT) + headers = {} + opentracing.tracer.inject( + span.context, + opentracing.Format.HTTP_HEADERS, + headers, + ) + r = requests.get(url, params=params, headers=headers) + assert r.status_code == 200 + return r.text + + +if __name__ == "__main__": + app.run(port=8080) diff --git a/chapter-04/python/exercise6/__init__.py b/chapter-04/python/exercise6/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/chapter-04/python/exercise6/bigbrother.py b/chapter-04/python/exercise6/bigbrother.py new file mode 100644 index 0000000..dc21a5b --- /dev/null +++ b/chapter-04/python/exercise6/bigbrother.py @@ -0,0 +1,38 @@ +from flask import Flask +from flask import request +import json +from .database import Person +from lib.tracing import init_tracer, flask_to_scope +import opentracing +from opentracing.ext import tags +from opentracing_instrumentation.client_hooks import install_all_patches +from flask_opentracing import FlaskTracer + + +app = Flask('py-6-bigbrother') +init_tracer('py-6-bigbrother') +install_all_patches() +flask_tracer = FlaskTracer(opentracing.tracer, True, app) + + +@app.route("/getPerson/") +def get_person_http(name): + with flask_to_scope(flask_tracer, request) as scope: + person = Person.get(name) + if person is None: + person = Person() + person.name = name + opentracing.tracer.active_span.log_kv({ + 'name': person.name, + 'title': person.title, + 'description': person.description, + }) + return json.dumps({ + 'name': person.name, + 'title': person.title, + 'description': person.description, + }) + + +if __name__ == "__main__": + app.run(port=8081) diff --git a/chapter-04/python/exercise6/database.py b/chapter-04/python/exercise6/database.py new file mode 100644 index 0000000..e1310e6 --- /dev/null +++ b/chapter-04/python/exercise6/database.py @@ -0,0 +1,23 @@ +from sqlalchemy import create_engine +from sqlalchemy.ext.declarative import declarative_base +from sqlalchemy.orm import sessionmaker +from sqlalchemy.schema import Column +from sqlalchemy.types import String + + +db_url = 'mysql+pymysql://root:mysqlpwd@localhost:3306/chapter04' +engine = create_engine(db_url, echo=False) +Session = sessionmaker(bind=engine) +session = Session() +Base = declarative_base() + + +class Person(Base): + __tablename__ = 'people' + name = Column(String, primary_key=True) + title = Column(String) + description = Column(String) + + @staticmethod + def get(name): + return session.query(Person).get(name) diff --git a/chapter-04/python/exercise6/formatter.py b/chapter-04/python/exercise6/formatter.py new file mode 100644 index 0000000..0f3a5d2 --- /dev/null +++ b/chapter-04/python/exercise6/formatter.py @@ -0,0 +1,42 @@ +from flask import Flask +from flask import request +from lib.tracing import init_tracer, flask_to_scope +import opentracing +from opentracing.ext import tags +from flask_opentracing import FlaskTracer + + +app = Flask('py-6-formatter') +init_tracer('py-6-formatter') +flask_tracer = FlaskTracer(opentracing.tracer, True, app) + + +@app.route("/formatGreeting") +def handle_format_greeting(): + with flask_to_scope(flask_tracer, request) as scope: + name = request.args.get('name') + title = request.args.get('title') + descr = request.args.get('description') + return format_greeting( + name=name, + title=title, + description=descr, + ) + + +def format_greeting(name, title, description): + with opentracing.tracer.start_active_span( + 'format-greeting', + ) as scope: + greeting = scope.span.get_baggage_item('greeting') or 'Hello' + greeting += ', ' + if title: + greeting += title + ' ' + greeting += name + '!' + if description: + greeting += ' ' + description + return greeting + + +if __name__ == "__main__": + app.run(port=8082) diff --git a/chapter-04/python/exercise6/hello.py b/chapter-04/python/exercise6/hello.py new file mode 100644 index 0000000..0ba8555 --- /dev/null +++ b/chapter-04/python/exercise6/hello.py @@ -0,0 +1,58 @@ +import sys +import json +import requests +from flask import Flask +from flask import request +from lib.tracing import init_tracer, flask_to_scope +import opentracing +from opentracing.ext import tags +from opentracing_instrumentation.client_hooks import install_all_patches +from flask_opentracing import FlaskTracer + + +app = Flask('py-6-hello') +init_tracer('py-6-hello') +install_all_patches() +flask_tracer = FlaskTracer(opentracing.tracer, True, app) + + +@app.route("/sayHello/") +def say_hello(name): + with flask_to_scope(flask_tracer, request) as scope: + person = get_person(name) + resp = format_greeting(person) + opentracing.tracer.active_span.set_tag('response', resp) + return resp + + +def get_person(name): + with opentracing.tracer.start_active_span( + 'get-person', + ) as scope: + url = 'http://localhost:8081/getPerson/%s' % name + res = _get(url) + person = json.loads(res) + scope.span.log_kv({ + 'name': person['name'], + 'title': person['title'], + 'description': person['description'], + }) + return person + + +def format_greeting(person): + with opentracing.tracer.start_active_span( + 'format-greeting', + ): + url = 'http://localhost:8082/formatGreeting' + return _get(url, params=person) + + +def _get(url, params=None): + r = requests.get(url, params=params) + assert r.status_code == 200 + return r.text + + +if __name__ == "__main__": + app.run(port=8080) diff --git a/chapter-04/python/lib/__init__.py b/chapter-04/python/lib/__init__.py new file mode 100644 index 0000000..e69de29 diff --git a/chapter-04/python/lib/tracing.py b/chapter-04/python/lib/tracing.py new file mode 100644 index 0000000..e364fb2 --- /dev/null +++ b/chapter-04/python/lib/tracing.py @@ -0,0 +1,30 @@ +import logging +import opentracing +from jaeger_client import Config + + +def init_tracer(service): + logging.getLogger('').handlers = [] + logging.basicConfig(format='%(message)s', level=logging.DEBUG) + + config = Config( + config={ + 'sampler': { + 'type': 'const', + 'param': 1, + }, + 'logging': True, + 'reporter_batch_size': 1, + }, + service_name=service, + ) + + # this call sets global variable opentracing.tracer + config.initialize_tracer() + + +def flask_to_scope(flask_tracer, request): + return opentracing.tracer.scope_manager.activate( + flask_tracer.get_span(request), + False, + ) diff --git a/chapter-04/python/requirements.txt b/chapter-04/python/requirements.txt new file mode 100644 index 0000000..86c607b --- /dev/null +++ b/chapter-04/python/requirements.txt @@ -0,0 +1,20 @@ + +requests +flask +sqlalchemy==1.2.10 +PyMySQL==0.7.11 + +# We want something like: jaeger-client>=3.8,<4 +# But Scope Manager support not officially released in Jaeger at the time of writing. +# This is using branch 'feature/opentracing-2.0-support' in @yurishkuro's fork. +-e git+https://github.com/yurishkuro/jaeger-client-python.git@d631596415cb549a4e8314cc25d6c53fab710528#egg=jaeger-client + +# We want something like: opentracing_instrumentation>=2.2,<3 +# But Scope Manager support not officially released in opentracing_instrumentation at the time of writing. +# This is using branch 'ot_scopemanager_integration' in @yurishkuro's fork. +-e git+https://github.com/yurishkuro/opentracing-python-instrumentation.git@6bb5db3ea4596869d581513df34533140debb6e8#egg=opentracing_instrumentation + +# We want something like: Flask-Opentracing>=1,<2, +# But it does not yet support Scope Managers: https://github.com/opentracing-contrib/python-flask/issues/18 +# This is the head commit @ master at the time of writing. +-e git+https://github.com/opentracing-contrib/python-flask.git@c00398411d9c5f4f789e097ab68a6d186f8cbba3#egg=flask_opentracing diff --git a/chapter-05/.gitignore b/chapter-05/.gitignore new file mode 100644 index 0000000..080e5ca --- /dev/null +++ b/chapter-05/.gitignore @@ -0,0 +1,5 @@ +.classpath +.project +.settings/ +target/ + diff --git a/chapter-05/.mvn/wrapper/.gitignore b/chapter-05/.mvn/wrapper/.gitignore new file mode 100644 index 0000000..e72f5e8 --- /dev/null +++ b/chapter-05/.mvn/wrapper/.gitignore @@ -0,0 +1 @@ +maven-wrapper.jar diff --git a/chapter-05/.mvn/wrapper/MavenWrapperDownloader.java b/chapter-05/.mvn/wrapper/MavenWrapperDownloader.java new file mode 100755 index 0000000..fa4f7b4 --- /dev/null +++ b/chapter-05/.mvn/wrapper/MavenWrapperDownloader.java @@ -0,0 +1,110 @@ +/* +Licensed to the Apache Software Foundation (ASF) under one +or more contributor license agreements. See the NOTICE file +distributed with this work for additional information +regarding copyright ownership. The ASF licenses this file +to you under the Apache License, Version 2.0 (the +"License"); you may not use this file except in compliance +with the License. You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, +software distributed under the License is distributed on an +"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +KIND, either express or implied. See the License for the +specific language governing permissions and limitations +under the License. +*/ + +import java.net.*; +import java.io.*; +import java.nio.channels.*; +import java.util.Properties; + +public class MavenWrapperDownloader { + + /** + * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided. + */ + private static final String DEFAULT_DOWNLOAD_URL = + "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.2/maven-wrapper-0.4.2.jar"; + + /** + * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to + * use instead of the default one. + */ + private static final String MAVEN_WRAPPER_PROPERTIES_PATH = + ".mvn/wrapper/maven-wrapper.properties"; + + /** + * Path where the maven-wrapper.jar will be saved to. + */ + private static final String MAVEN_WRAPPER_JAR_PATH = + ".mvn/wrapper/maven-wrapper.jar"; + + /** + * Name of the property which should be used to override the default download url for the wrapper. + */ + private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl"; + + public static void main(String args[]) { + System.out.println("- Downloader started"); + File baseDirectory = new File(args[0]); + System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath()); + + // If the maven-wrapper.properties exists, read it and check if it contains a custom + // wrapperUrl parameter. + File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH); + String url = DEFAULT_DOWNLOAD_URL; + if(mavenWrapperPropertyFile.exists()) { + FileInputStream mavenWrapperPropertyFileInputStream = null; + try { + mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile); + Properties mavenWrapperProperties = new Properties(); + mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream); + url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url); + } catch (IOException e) { + System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'"); + } finally { + try { + if(mavenWrapperPropertyFileInputStream != null) { + mavenWrapperPropertyFileInputStream.close(); + } + } catch (IOException e) { + // Ignore ... + } + } + } + System.out.println("- Downloading from: : " + url); + + File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH); + if(!outputFile.getParentFile().exists()) { + if(!outputFile.getParentFile().mkdirs()) { + System.out.println( + "- ERROR creating output direcrory '" + outputFile.getParentFile().getAbsolutePath() + "'"); + } + } + System.out.println("- Downloading to: " + outputFile.getAbsolutePath()); + try { + downloadFileFromURL(url, outputFile); + System.out.println("Done"); + System.exit(0); + } catch (Throwable e) { + System.out.println("- Error downloading"); + e.printStackTrace(); + System.exit(1); + } + } + + private static void downloadFileFromURL(String urlString, File destination) throws Exception { + URL website = new URL(urlString); + ReadableByteChannel rbc; + rbc = Channels.newChannel(website.openStream()); + FileOutputStream fos = new FileOutputStream(destination); + fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE); + fos.close(); + rbc.close(); + } + +} diff --git a/chapter-05/.mvn/wrapper/maven-wrapper.properties b/chapter-05/.mvn/wrapper/maven-wrapper.properties new file mode 100755 index 0000000..00d32aa --- /dev/null +++ b/chapter-05/.mvn/wrapper/maven-wrapper.properties @@ -0,0 +1 @@ +distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.5.4/apache-maven-3.5.4-bin.zip \ No newline at end of file diff --git a/chapter-05/Makefile b/chapter-05/Makefile new file mode 100644 index 0000000..3f61a39 --- /dev/null +++ b/chapter-05/Makefile @@ -0,0 +1,25 @@ +#all: compose chatapi webapp storage giphy + +CH6_EX ?= 1 +KSEND ?= sync + +GROUP_ID := com.packt.distributed-tracing-chapter-05 +JAEGER := \ + -DJAEGER_SAMPLER_TYPE=const \ + -DJAEGER_SAMPLER_PARAM=1 +JAEGER_CHAT_API := -DJAEGER_SERVICE_NAME=chat-api-$(CH6_EX) $(JAEGER) -DKSEND=$(KSEND) +JAEGER_STORAGE := -DJAEGER_SERVICE_NAME=storage-service-$(CH6_EX) $(JAEGER) +JAEGER_GIPHY := -DJAEGER_SERVICE_NAME=giphy-service-$(CH6_EX) $(JAEGER) + +compose: + docker-compose up +chatapi: + mvn $(JAEGER_CHAT_API) spring-boot:run -pl $(GROUP_ID):chat-api-$(CH6_EX) +storage: + mvn $(JAEGER_STORAGE) spring-boot:run -pl $(GROUP_ID):storage-service-$(CH6_EX) +giphy: + mvn $(JAEGER_GIPHY) spring-boot:run -pl $(GROUP_ID):giphy-service-$(CH6_EX) +build-webapp: + rm -rf webapp/dist webapp/public/* + (cd webapp && yarn && yarn build) + cp webapp/dist/{app.*.js,favicon.*.ico,index.html} webapp/public/ diff --git a/chapter-05/docker-compose.yml b/chapter-05/docker-compose.yml new file mode 100644 index 0000000..b13c451 --- /dev/null +++ b/chapter-05/docker-compose.yml @@ -0,0 +1,36 @@ +version: "3" +services: + kafka: + image: confluentinc/cp-kafka:5.0.0-2 + ports: + - 9092:9092 + environment: + KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181 + KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://localhost:9092 + KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1 + KAFKA_BROKER_ID: 1 + restart: on-failure + zookeeper: + image: confluentinc/cp-zookeeper:5.0.0-2 + ports: + - 2181:2181 + environment: + ZOOKEEPER_CLIENT_PORT: 2181 + redis: + image: redis:alpine + ports: + - 6379:6379 + jaeger-all-in-one: + image: jaegertracing/all-in-one:1.6 + ports: + - "5775:5775/udp" + - "6831:6831/udp" + - "6832:6832/udp" + - "5778:5778" + - "14267" + - "14268:14268" + - "14269" + - "16686:16686" + - "16687" + - "9411:9411" + restart: on-failure diff --git a/chapter-05/exercise1/chat-api/pom.xml b/chapter-05/exercise1/chat-api/pom.xml new file mode 100644 index 0000000..41826ba --- /dev/null +++ b/chapter-05/exercise1/chat-api/pom.xml @@ -0,0 +1,57 @@ + + + 4.0.0 + + com.packt.distributed-tracing-chapter-05 + chat-api-1 + jar + + + com.packt.distributed-tracing-chapter-05 + exercise1 + 0.0.1-SNAPSHOT + ../ + + + + UTF-8 + UTF-8 + 1.8 + ${project.basedir}/.. + + + + + com.packt.distributed-tracing-chapter-05 + lib + + + org.springframework.boot + spring-boot-starter-web + + + io.opentracing.contrib + opentracing-spring-cloud-starter + + + io.opentracing.contrib + opentracing-spring-tracer-configuration-starter + + + io.jaegertracing + jaeger-client + + + + + + ../../webapp + + public/** + + + + + + diff --git a/chapter-05/exercise1/chat-api/src/main/java/chat/App.java b/chapter-05/exercise1/chat-api/src/main/java/chat/App.java new file mode 100644 index 0000000..2d14ede --- /dev/null +++ b/chapter-05/exercise1/chat-api/src/main/java/chat/App.java @@ -0,0 +1,21 @@ +package chat; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.context.annotation.Bean; +import org.springframework.context.annotation.ComponentScan; + +import lib.AppId; + +@SpringBootApplication +@ComponentScan(basePackages = {"lib", "chat"}) +public class App { + @Bean + public AppId appId() { + return new AppId("chat-api"); + } + + public static void main(String[] args) { + SpringApplication.run(App.class, args); + } +} \ No newline at end of file diff --git a/chapter-05/exercise1/chat-api/src/main/java/chat/ChatController.java b/chapter-05/exercise1/chat-api/src/main/java/chat/ChatController.java new file mode 100644 index 0000000..1d122f3 --- /dev/null +++ b/chapter-05/exercise1/chat-api/src/main/java/chat/ChatController.java @@ -0,0 +1,85 @@ +package chat; + +import java.util.List; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.Executor; + +import org.apache.kafka.clients.producer.ProducerRecord; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.context.annotation.Bean; +import org.springframework.http.HttpStatus; +import org.springframework.http.MediaType; +import org.springframework.http.ResponseEntity; +import org.springframework.kafka.core.KafkaTemplate; +import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor; +import org.springframework.stereotype.Controller; +import org.springframework.web.bind.annotation.CrossOrigin; +import org.springframework.web.bind.annotation.RequestBody; +import org.springframework.web.bind.annotation.RequestMapping; +import org.springframework.web.bind.annotation.RequestMethod; +import org.springframework.web.bind.annotation.RequestParam; +import org.springframework.web.bind.annotation.ResponseBody; +import org.springframework.web.bind.annotation.RestController; + +import lib.KafkaService; +import lib.Message; +import lib.RedisService; + +@CrossOrigin(maxAge = 3600) +@RestController +@Controller +public class ChatController { + + @Autowired + KafkaTemplate kafkaTemplate; + + @Autowired + RedisService redis; + + @Autowired + KafkaService kafka; + + @Bean + public Executor asyncExecutor() { + ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor(); + executor.setCorePoolSize(2); + executor.setMaxPoolSize(2); + executor.setQueueCapacity(10); + executor.setThreadNamePrefix("send-to-kafka-"); + executor.initialize(); + return executor; + } + + Executor executor1 = asyncExecutor(); + + @Autowired + Executor executor2; + + private String sendMode = System.getProperty("KSEND"); + + @RequestMapping(value = "/message", method = RequestMethod.GET) + public @ResponseBody List getMessages(@RequestParam(value = "room", defaultValue = "lobby") String room) + throws Exception { + List messages = redis.getMessages(room); + System.out.println("Retrieved " + messages.size() + " messages."); + return messages; + } + + @RequestMapping(value = "/message", consumes = { "application/json" }, produces = { + MediaType.APPLICATION_JSON_VALUE }, method = RequestMethod.POST) + public ResponseEntity postMessage(@RequestBody Message msg) throws Exception { + msg.init(); + System.out.println("Received message: " + msg); + if ("async1".equals(sendMode)) { + kafka.sendMessageAsync(msg, executor1); + System.out.println("Message sent async (executor1) to Kafka"); + } else if ("async2".equals(sendMode)) { + kafka.sendMessageAsync(msg, executor2); + System.out.println("Message sent async (executor2) to Kafka"); + } else { + kafka.sendMessage(msg); + System.out.println("Message sent sync to Kafka"); + } + return new ResponseEntity(msg, HttpStatus.OK); + } +} \ No newline at end of file diff --git a/chapter-05/exercise1/giphy-service/pom.xml b/chapter-05/exercise1/giphy-service/pom.xml new file mode 100644 index 0000000..4446c73 --- /dev/null +++ b/chapter-05/exercise1/giphy-service/pom.xml @@ -0,0 +1,42 @@ + + + 4.0.0 + + com.packt.distributed-tracing-chapter-05 + giphy-service-1 + jar + + + com.packt.distributed-tracing-chapter-05 + exercise1 + 0.0.1-SNAPSHOT + ../ + + + + UTF-8 + UTF-8 + 1.8 + ${project.basedir}/.. + + + + + com.packt.distributed-tracing-chapter-05 + lib + + + io.opentracing.contrib + opentracing-spring-cloud-starter + + + io.opentracing.contrib + opentracing-spring-tracer-configuration-starter + + + io.jaegertracing + jaeger-client + + + diff --git a/chapter-05/exercise1/giphy-service/src/main/java/giphy/App.java b/chapter-05/exercise1/giphy-service/src/main/java/giphy/App.java new file mode 100644 index 0000000..a9f89cb --- /dev/null +++ b/chapter-05/exercise1/giphy-service/src/main/java/giphy/App.java @@ -0,0 +1,61 @@ +package giphy; + +import org.apache.kafka.clients.producer.ProducerRecord; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.context.annotation.Bean; +import org.springframework.context.annotation.ComponentScan; +import org.springframework.kafka.annotation.EnableKafka; +import org.springframework.kafka.annotation.KafkaListener; +import org.springframework.kafka.core.KafkaTemplate; +import org.springframework.messaging.MessageHeaders; +import org.springframework.messaging.handler.annotation.Headers; +import org.springframework.messaging.handler.annotation.Payload; + +import io.opentracing.Scope; +import io.opentracing.Span; +import io.opentracing.Tracer; +import lib.AppId; +import lib.GiphyService; +import lib.KafkaService; +import lib.Message; + +@EnableKafka +@SpringBootApplication +@ComponentScan(basePackages="lib") +public class App { + @Bean + public AppId appId() { + return new AppId("giphy-service"); + } + + @Autowired + GiphyService giphy; + + @Autowired + KafkaService kafka; + + @Autowired + Tracer tracer; + + @KafkaListener(topics = "message") + public void process(@Payload Message message, @Headers MessageHeaders headers) throws Exception { + Span span = kafka.startConsumerSpan("process", headers); + try (Scope scope = tracer.scopeManager().activate(span, true)) { + System.out.println("Received message: " + message.message); + if (message.image == null && message.message.trim().startsWith("/giphy")) { + String query = message.message.split("/giphy")[1].trim(); + System.out.println("Giphy requested: " + query); + String gifUrl = giphy.query(query); + message.image =gifUrl; + kafka.sendMessage(message); + System.out.println("Updated message, url=" + gifUrl); + } + } + } + + public static void main(String[] args) throws Exception { + SpringApplication.run(App.class, args); + } +} diff --git a/chapter-05/exercise1/pom.xml b/chapter-05/exercise1/pom.xml new file mode 100644 index 0000000..c59b142 --- /dev/null +++ b/chapter-05/exercise1/pom.xml @@ -0,0 +1,24 @@ + + + 4.0.0 + + com.packt.distributed-tracing-chapter-05 + exercise1 + pom + + + chat-api + giphy-service + storage-service + + + + com.packt.distributed-tracing-chapter-05 + parent + 0.0.1-SNAPSHOT + ../ + + + + diff --git a/chapter-05/exercise1/storage-service/pom.xml b/chapter-05/exercise1/storage-service/pom.xml new file mode 100644 index 0000000..3d19a9b --- /dev/null +++ b/chapter-05/exercise1/storage-service/pom.xml @@ -0,0 +1,46 @@ + + + 4.0.0 + + com.packt.distributed-tracing-chapter-05 + storage-service-1 + jar + + + com.packt.distributed-tracing-chapter-05 + exercise1 + 0.0.1-SNAPSHOT + ../ + + + + UTF-8 + UTF-8 + 1.8 + ${project.basedir}/.. + + + + + com.packt.distributed-tracing-chapter-05 + lib + + + org.springframework + spring-web + + + io.opentracing.contrib + opentracing-spring-cloud-starter + + + io.opentracing.contrib + opentracing-spring-tracer-configuration-starter + + + io.jaegertracing + jaeger-client + + + diff --git a/chapter-05/exercise1/storage-service/src/main/java/storage/App.java b/chapter-05/exercise1/storage-service/src/main/java/storage/App.java new file mode 100644 index 0000000..83b9f9b --- /dev/null +++ b/chapter-05/exercise1/storage-service/src/main/java/storage/App.java @@ -0,0 +1,53 @@ +package storage; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.context.annotation.Bean; +import org.springframework.context.annotation.ComponentScan; +import org.springframework.kafka.annotation.EnableKafka; +import org.springframework.kafka.annotation.KafkaListener; +import org.springframework.messaging.MessageHeaders; +import org.springframework.messaging.handler.annotation.Headers; +import org.springframework.messaging.handler.annotation.Payload; + +import io.opentracing.Scope; +import io.opentracing.Span; +import io.opentracing.Tracer; +import lib.AppId; +import lib.KafkaService; +import lib.Message; +import lib.RedisService; + +@EnableKafka +@SpringBootApplication +@ComponentScan(basePackages="lib") +public class App { + @Autowired + RedisService redis; + + @Autowired + KafkaService kafka; + + @Autowired + Tracer tracer; + + @Bean + public AppId appId() { + return new AppId("storage-service"); + } + + @KafkaListener(topics = "message") + public void process(@Payload Message message, @Headers MessageHeaders headers) throws Exception { + Span span = kafka.startConsumerSpan("process", headers); + try (Scope scope = tracer.scopeManager().activate(span, true)) { + System.out.println("Received message: " + message.message); + redis.addMessage(message); + System.out.println("Added message to room."); + } + } + + public static void main(String[] args) throws Exception { + SpringApplication.run(App.class, args); + } +} diff --git a/chapter-05/lib/pom.xml b/chapter-05/lib/pom.xml new file mode 100644 index 0000000..f4d770f --- /dev/null +++ b/chapter-05/lib/pom.xml @@ -0,0 +1,56 @@ + + + 4.0.0 + + com.packt.distributed-tracing-chapter-05 + lib + + + com.packt.distributed-tracing-chapter-05 + parent + 0.0.1-SNAPSHOT + ../ + + + + UTF-8 + UTF-8 + 1.8 + + + + + org.springframework.boot + spring-boot-starter + + + org.springframework + spring-web + + + org.springframework.kafka + spring-kafka + + + org.apache.kafka + kafka-clients + + + com.fasterxml.jackson.core + jackson-databind + + + io.opentracing + opentracing-api + + + io.opentracing.contrib + opentracing-kafka-spring + + + io.opentracing.contrib + opentracing-redis-lettuce + + + diff --git a/chapter-05/lib/src/main/java/lib/AppId.java b/chapter-05/lib/src/main/java/lib/AppId.java new file mode 100644 index 0000000..324fdc6 --- /dev/null +++ b/chapter-05/lib/src/main/java/lib/AppId.java @@ -0,0 +1,9 @@ +package lib; + +public class AppId { + public final String name; + + public AppId(String name) { + this.name = name; + } +} \ No newline at end of file diff --git a/chapter-05/lib/src/main/java/lib/GiphyService.java b/chapter-05/lib/src/main/java/lib/GiphyService.java new file mode 100644 index 0000000..de4b8ea --- /dev/null +++ b/chapter-05/lib/src/main/java/lib/GiphyService.java @@ -0,0 +1,69 @@ +package lib; + +import java.net.URI; +import java.util.Collections; +import java.util.List; +import java.util.stream.Collectors; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.context.annotation.Bean; +import org.springframework.http.ResponseEntity; +import org.springframework.stereotype.Service; +import org.springframework.web.client.RestTemplate; +import org.springframework.web.util.UriComponentsBuilder; + +@Service +public class GiphyService { + private final static String GIPHY_URL = "http://api.giphy.com/v1/gifs/search"; + private final static String GIPHY_API_TOKEN = "DhFQzq6E4uSzDgx6FFmTC0xqV0iFYDFK"; + + @Bean + public RestTemplate restTemplate() { + return new RestTemplate(); + } + + @Autowired + RestTemplate restTemplate; + + public String query(String query) { + try { + URI uri = UriComponentsBuilder // + .fromHttpUrl(GIPHY_URL) // + .queryParam("q", query) // + .queryParam("api_key", GIPHY_API_TOKEN) // + .queryParam("limit", "10") // + .queryParam("rating", "pg") // + .build(Collections.emptyMap()); + ResponseEntity response = restTemplate.getForEntity(uri, Response.class); + List urls = response.getBody().data.stream().filter( + d -> d.images != null && d.images.original != null && d.images.original.url != null + ).map(d -> d.images.original.url).collect(Collectors.toList()); + if (urls.isEmpty()) { + return null; + } + System.out.println("Giphy returned " + urls.size() + " images for " + query); + int pick = (int)(Math.random() * urls.size()); + String url = urls.get(pick); + return url; + } catch (Exception e) { + e.printStackTrace(); + } + return null; + } + + public static class Response { + public List data; + } + + public static class Data { + public Images images; + } + + public static class Images { + public Image original; + } + + public static class Image { + public String url; + } +} \ No newline at end of file diff --git a/chapter-05/lib/src/main/java/lib/KafkaConfig.java b/chapter-05/lib/src/main/java/lib/KafkaConfig.java new file mode 100644 index 0000000..23b888f --- /dev/null +++ b/chapter-05/lib/src/main/java/lib/KafkaConfig.java @@ -0,0 +1,81 @@ +package lib; + +import java.net.InetAddress; +import java.util.HashMap; +import java.util.Map; + +import org.apache.kafka.clients.consumer.ConsumerConfig; +import org.apache.kafka.clients.producer.ProducerConfig; +import org.apache.kafka.common.serialization.StringDeserializer; +import org.apache.kafka.common.serialization.StringSerializer; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.context.annotation.Bean; +import org.springframework.context.annotation.Configuration; +import org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory; +import org.springframework.kafka.core.ConsumerFactory; +import org.springframework.kafka.core.DefaultKafkaConsumerFactory; +import org.springframework.kafka.core.DefaultKafkaProducerFactory; +import org.springframework.kafka.core.KafkaTemplate; +import org.springframework.kafka.core.ProducerFactory; +import org.springframework.kafka.support.serializer.JsonDeserializer; +import org.springframework.kafka.support.serializer.JsonSerializer; + +import io.opentracing.Tracer; +import io.opentracing.contrib.kafka.spring.TracingConsumerFactory; +import io.opentracing.contrib.kafka.spring.TracingProducerFactory; + +@Configuration +public class KafkaConfig { + + @Autowired + AppId app; + + @Autowired + Tracer tracer; + + @Bean + public Object kafkaListenerContainerFactory() throws Exception { + ConcurrentKafkaListenerContainerFactory factory = // + new ConcurrentKafkaListenerContainerFactory<>(); + factory.setConsumerFactory(consumerFactory()); + return factory; + } + + @Bean + public KafkaTemplate kafkaTemplate() throws Exception { + return new KafkaTemplate<>(producerFactory()); + } + + private String clientId() throws Exception { + return InetAddress.getLocalHost().getHostName() + "-" + app.name; + } + + private ConsumerFactory consumerFactory() throws Exception { + Map props = new HashMap<>(); + props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092"); + props.put(ConsumerConfig.CLIENT_ID_CONFIG, clientId()); + props.put(ConsumerConfig.GROUP_ID_CONFIG, app.name); + props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest"); + props.put(ConsumerConfig.MAX_POLL_RECORDS_CONFIG, 1000); + props.put(ConsumerConfig.AUTO_COMMIT_INTERVAL_MS_CONFIG, "100"); + props.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, true); + props.put(ConsumerConfig.SESSION_TIMEOUT_MS_CONFIG, "15000"); + + return new TracingConsumerFactory<>( // + new DefaultKafkaConsumerFactory( // + props, // + new StringDeserializer(), // + new JsonDeserializer<>(Message.class))); + } + + private ProducerFactory producerFactory() throws Exception { + Map props = new HashMap<>(); + props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092"); + props.put(ProducerConfig.CLIENT_ID_CONFIG, clientId()); + ProducerFactory producer = // + new DefaultKafkaProducerFactory(props, // + new StringSerializer(), // + new JsonSerializer()); + return new TracingProducerFactory(producer, tracer); + } +} diff --git a/chapter-05/lib/src/main/java/lib/KafkaService.java b/chapter-05/lib/src/main/java/lib/KafkaService.java new file mode 100644 index 0000000..1855d28 --- /dev/null +++ b/chapter-05/lib/src/main/java/lib/KafkaService.java @@ -0,0 +1,88 @@ +package lib; + +import java.nio.charset.StandardCharsets; +import java.util.HashMap; +import java.util.Iterator; +import java.util.Map; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.Executor; + +import org.apache.kafka.clients.producer.ProducerRecord; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.kafka.core.KafkaTemplate; +import org.springframework.messaging.MessageHeaders; +import org.springframework.stereotype.Service; + +import io.opentracing.References; +import io.opentracing.Span; +import io.opentracing.SpanContext; +import io.opentracing.Tracer; +import io.opentracing.propagation.Format; +import io.opentracing.propagation.TextMap; + +@Service +public class KafkaService { + private static final String TOPIC = "message"; + + @Autowired + Tracer tracer; + + @Autowired + KafkaTemplate kafkaTemplate; + + public void sendMessage(Message message) throws Exception { + ProducerRecord record = new ProducerRecord<>(TOPIC, message); + kafkaTemplate.send(record).get(); + } + + public Span startConsumerSpan(String name, MessageHeaders headers) { + TextMap carrier = new MessageHeadersExtractAdapter(headers); + SpanContext parent = tracer.extract(Format.Builtin.TEXT_MAP, carrier); + return tracer.buildSpan(name) // + .addReference(References.FOLLOWS_FROM, parent) // + .start(); + } + + public void sendMessageAsync(Message message, Executor executor) throws Exception { + CompletableFuture.supplyAsync(() -> { + ProducerRecord record = new ProducerRecord<>(TOPIC, message); + kafkaTemplate.send(record); + return message.id; + }, executor).get(); + } + + /** + * An adapter from Spring MessageHeaders to OpenTracing TextMap carrier. It + * relies on the behavior of + * io.opentracing.contrib.kafka.spring.TracingConsumerFactory that stores the + * context of the "receive" span in the headers with "second_span_" prefix. + */ + private static class MessageHeadersExtractAdapter implements TextMap { + + private final Map map = new HashMap<>(); + + MessageHeadersExtractAdapter(MessageHeaders headers) { + for (Map.Entry header : headers.entrySet()) { + if (!header.getKey().startsWith("second_span_")) { + continue; + } + if (!(header.getValue() instanceof byte[])) { + continue; + } + String key = header.getKey().replaceFirst("^second_span_", ""); + String value = new String((byte[]) header.getValue(), StandardCharsets.UTF_8); + map.put(key, value); + } + } + + @Override + public Iterator> iterator() { + return map.entrySet().iterator(); + } + + @Override + public void put(String key, String value) { + throw new UnsupportedOperationException("should only be used with Tracer.extract()"); + } + } +} diff --git a/chapter-05/lib/src/main/java/lib/Message.java b/chapter-05/lib/src/main/java/lib/Message.java new file mode 100644 index 0000000..e874975 --- /dev/null +++ b/chapter-05/lib/src/main/java/lib/Message.java @@ -0,0 +1,31 @@ +package lib; + +import java.text.DateFormat; +import java.text.SimpleDateFormat; +import java.util.Date; +import java.util.TimeZone; +import java.util.UUID; + +public class Message { + public String event; + public String id; + public String author; + public String message; + public String room; + public String date; + public String image; + + public void init() { + this.id = UUID.randomUUID().toString(); + TimeZone tz = TimeZone.getTimeZone("UTC"); + // Quoted "Z" to indicate UTC, no timezone offset + DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'"); + df.setTimeZone(tz); + this.date = df.format(new Date()); + } + + @Override + public String toString() { + return this.id + " - " + this.message; + } +} \ No newline at end of file diff --git a/chapter-05/lib/src/main/java/lib/RedisConfig.java b/chapter-05/lib/src/main/java/lib/RedisConfig.java new file mode 100644 index 0000000..61baae6 --- /dev/null +++ b/chapter-05/lib/src/main/java/lib/RedisConfig.java @@ -0,0 +1,32 @@ +package lib; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.context.annotation.Bean; +import org.springframework.context.annotation.Configuration; + +import io.lettuce.core.RedisClient; +import io.lettuce.core.api.StatefulRedisConnection; +import io.lettuce.core.api.sync.RedisCommands; +import io.opentracing.Tracer; +import io.opentracing.contrib.redis.lettuce.TracingStatefulRedisConnection; + +@Configuration +public class RedisConfig { + @Autowired + Tracer tracer; + + @Bean + public StatefulRedisConnection redisConn() { + RedisClient client = RedisClient.create("redis://localhost"); + return new TracingStatefulRedisConnection<>( // + client.connect(), tracer, false); + } + + @Autowired + StatefulRedisConnection redisConn; + + @Bean + public RedisCommands redisClientSync() { + return redisConn.sync(); + } +} diff --git a/chapter-05/lib/src/main/java/lib/RedisService.java b/chapter-05/lib/src/main/java/lib/RedisService.java new file mode 100644 index 0000000..9fd1616 --- /dev/null +++ b/chapter-05/lib/src/main/java/lib/RedisService.java @@ -0,0 +1,44 @@ +package lib; + +import java.time.Instant; +import java.util.ArrayList; +import java.util.List; + +import com.fasterxml.jackson.databind.ObjectMapper; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.stereotype.Service; + +import io.lettuce.core.api.sync.RedisCommands; + +@Service +public class RedisService { + @Autowired + RedisCommands syncCommands; + + public void addMessage(Message message) throws Exception { + ObjectMapper objectMapper = new ObjectMapper(); + String jsonString = objectMapper.writeValueAsString(message); + + syncCommands.set("message:" + message.id, jsonString); + + Long epoch = Instant.parse(message.date).getEpochSecond(); + syncCommands.zadd(message.room, epoch.doubleValue(), message.id); + } + + public List getMessages(String room) throws Exception { + List ids = syncCommands.zrange(room, 0, -1); + List messages = new ArrayList(ids.size()); + for (String id : ids) { + try { + String jsonString = syncCommands.get("message:" + id); + ObjectMapper objectMapper = new ObjectMapper(); + Message message = objectMapper.readValue(jsonString, Message.class); + messages.add(message); + } catch (Exception e) { + e.printStackTrace(); + } + } + return messages; + } +} diff --git a/chapter-05/mvnw b/chapter-05/mvnw new file mode 100755 index 0000000..5551fde --- /dev/null +++ b/chapter-05/mvnw @@ -0,0 +1,286 @@ +#!/bin/sh +# ---------------------------------------------------------------------------- +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. +# ---------------------------------------------------------------------------- + +# ---------------------------------------------------------------------------- +# Maven2 Start Up Batch script +# +# Required ENV vars: +# ------------------ +# JAVA_HOME - location of a JDK home dir +# +# Optional ENV vars +# ----------------- +# M2_HOME - location of maven2's installed home dir +# MAVEN_OPTS - parameters passed to the Java VM when running Maven +# e.g. to debug Maven itself, use +# set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000 +# MAVEN_SKIP_RC - flag to disable loading of mavenrc files +# ---------------------------------------------------------------------------- + +if [ -z "$MAVEN_SKIP_RC" ] ; then + + if [ -f /etc/mavenrc ] ; then + . /etc/mavenrc + fi + + if [ -f "$HOME/.mavenrc" ] ; then + . "$HOME/.mavenrc" + fi + +fi + +# OS specific support. $var _must_ be set to either true or false. +cygwin=false; +darwin=false; +mingw=false +case "`uname`" in + CYGWIN*) cygwin=true ;; + MINGW*) mingw=true;; + Darwin*) darwin=true + # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home + # See https://developer.apple.com/library/mac/qa/qa1170/_index.html + if [ -z "$JAVA_HOME" ]; then + if [ -x "/usr/libexec/java_home" ]; then + export JAVA_HOME="`/usr/libexec/java_home`" + else + export JAVA_HOME="/Library/Java/Home" + fi + fi + ;; +esac + +if [ -z "$JAVA_HOME" ] ; then + if [ -r /etc/gentoo-release ] ; then + JAVA_HOME=`java-config --jre-home` + fi +fi + +if [ -z "$M2_HOME" ] ; then + ## resolve links - $0 may be a link to maven's home + PRG="$0" + + # need this for relative symlinks + while [ -h "$PRG" ] ; do + ls=`ls -ld "$PRG"` + link=`expr "$ls" : '.*-> \(.*\)$'` + if expr "$link" : '/.*' > /dev/null; then + PRG="$link" + else + PRG="`dirname "$PRG"`/$link" + fi + done + + saveddir=`pwd` + + M2_HOME=`dirname "$PRG"`/.. + + # make it fully qualified + M2_HOME=`cd "$M2_HOME" && pwd` + + cd "$saveddir" + # echo Using m2 at $M2_HOME +fi + +# For Cygwin, ensure paths are in UNIX format before anything is touched +if $cygwin ; then + [ -n "$M2_HOME" ] && + M2_HOME=`cygpath --unix "$M2_HOME"` + [ -n "$JAVA_HOME" ] && + JAVA_HOME=`cygpath --unix "$JAVA_HOME"` + [ -n "$CLASSPATH" ] && + CLASSPATH=`cygpath --path --unix "$CLASSPATH"` +fi + +# For Mingw, ensure paths are in UNIX format before anything is touched +if $mingw ; then + [ -n "$M2_HOME" ] && + M2_HOME="`(cd "$M2_HOME"; pwd)`" + [ -n "$JAVA_HOME" ] && + JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`" + # TODO classpath? +fi + +if [ -z "$JAVA_HOME" ]; then + javaExecutable="`which javac`" + if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then + # readlink(1) is not available as standard on Solaris 10. + readLink=`which readlink` + if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then + if $darwin ; then + javaHome="`dirname \"$javaExecutable\"`" + javaExecutable="`cd \"$javaHome\" && pwd -P`/javac" + else + javaExecutable="`readlink -f \"$javaExecutable\"`" + fi + javaHome="`dirname \"$javaExecutable\"`" + javaHome=`expr "$javaHome" : '\(.*\)/bin'` + JAVA_HOME="$javaHome" + export JAVA_HOME + fi + fi +fi + +if [ -z "$JAVACMD" ] ; then + if [ -n "$JAVA_HOME" ] ; then + if [ -x "$JAVA_HOME/jre/sh/java" ] ; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD="$JAVA_HOME/jre/sh/java" + else + JAVACMD="$JAVA_HOME/bin/java" + fi + else + JAVACMD="`which java`" + fi +fi + +if [ ! -x "$JAVACMD" ] ; then + echo "Error: JAVA_HOME is not defined correctly." >&2 + echo " We cannot execute $JAVACMD" >&2 + exit 1 +fi + +if [ -z "$JAVA_HOME" ] ; then + echo "Warning: JAVA_HOME environment variable is not set." +fi + +CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher + +# traverses directory structure from process work directory to filesystem root +# first directory with .mvn subdirectory is considered project base directory +find_maven_basedir() { + + if [ -z "$1" ] + then + echo "Path not specified to find_maven_basedir" + return 1 + fi + + basedir="$1" + wdir="$1" + while [ "$wdir" != '/' ] ; do + if [ -d "$wdir"/.mvn ] ; then + basedir=$wdir + break + fi + # workaround for JBEAP-8937 (on Solaris 10/Sparc) + if [ -d "${wdir}" ]; then + wdir=`cd "$wdir/.."; pwd` + fi + # end of workaround + done + echo "${basedir}" +} + +# concatenates all lines of a file +concat_lines() { + if [ -f "$1" ]; then + echo "$(tr -s '\n' ' ' < "$1")" + fi +} + +BASE_DIR=`find_maven_basedir "$(pwd)"` +if [ -z "$BASE_DIR" ]; then + exit 1; +fi + +########################################################################################## +# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central +# This allows using the maven wrapper in projects that prohibit checking in binary data. +########################################################################################## +if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then + if [ "$MVNW_VERBOSE" = true ]; then + echo "Found .mvn/wrapper/maven-wrapper.jar" + fi +else + if [ "$MVNW_VERBOSE" = true ]; then + echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..." + fi + jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.2/maven-wrapper-0.4.2.jar" + while IFS="=" read key value; do + case "$key" in (wrapperUrl) jarUrl="$value"; break ;; + esac + done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties" + if [ "$MVNW_VERBOSE" = true ]; then + echo "Downloading from: $jarUrl" + fi + wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" + + if command -v wget > /dev/null; then + if [ "$MVNW_VERBOSE" = true ]; then + echo "Found wget ... using wget" + fi + wget "$jarUrl" -O "$wrapperJarPath" + elif command -v curl > /dev/null; then + if [ "$MVNW_VERBOSE" = true ]; then + echo "Found curl ... using curl" + fi + curl -o "$wrapperJarPath" "$jarUrl" + else + if [ "$MVNW_VERBOSE" = true ]; then + echo "Falling back to using Java to download" + fi + javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java" + if [ -e "$javaClass" ]; then + if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then + if [ "$MVNW_VERBOSE" = true ]; then + echo " - Compiling MavenWrapperDownloader.java ..." + fi + # Compiling the Java class + ("$JAVA_HOME/bin/javac" "$javaClass") + fi + if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then + # Running the downloader + if [ "$MVNW_VERBOSE" = true ]; then + echo " - Running MavenWrapperDownloader.java ..." + fi + ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR") + fi + fi + fi +fi +########################################################################################## +# End of extension +########################################################################################## + +export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"} +if [ "$MVNW_VERBOSE" = true ]; then + echo $MAVEN_PROJECTBASEDIR +fi +MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS" + +# For Cygwin, switch paths to Windows format before running java +if $cygwin; then + [ -n "$M2_HOME" ] && + M2_HOME=`cygpath --path --windows "$M2_HOME"` + [ -n "$JAVA_HOME" ] && + JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"` + [ -n "$CLASSPATH" ] && + CLASSPATH=`cygpath --path --windows "$CLASSPATH"` + [ -n "$MAVEN_PROJECTBASEDIR" ] && + MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"` +fi + +WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain + +exec "$JAVACMD" \ + $MAVEN_OPTS \ + -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \ + "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \ + ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@" diff --git a/chapter-05/mvnw.cmd b/chapter-05/mvnw.cmd new file mode 100755 index 0000000..48363fa --- /dev/null +++ b/chapter-05/mvnw.cmd @@ -0,0 +1,161 @@ +@REM ---------------------------------------------------------------------------- +@REM Licensed to the Apache Software Foundation (ASF) under one +@REM or more contributor license agreements. See the NOTICE file +@REM distributed with this work for additional information +@REM regarding copyright ownership. The ASF licenses this file +@REM to you under the Apache License, Version 2.0 (the +@REM "License"); you may not use this file except in compliance +@REM with the License. You may obtain a copy of the License at +@REM +@REM http://www.apache.org/licenses/LICENSE-2.0 +@REM +@REM Unless required by applicable law or agreed to in writing, +@REM software distributed under the License is distributed on an +@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +@REM KIND, either express or implied. See the License for the +@REM specific language governing permissions and limitations +@REM under the License. +@REM ---------------------------------------------------------------------------- + +@REM ---------------------------------------------------------------------------- +@REM Maven2 Start Up Batch script +@REM +@REM Required ENV vars: +@REM JAVA_HOME - location of a JDK home dir +@REM +@REM Optional ENV vars +@REM M2_HOME - location of maven2's installed home dir +@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands +@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a key stroke before ending +@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven +@REM e.g. to debug Maven itself, use +@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000 +@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files +@REM ---------------------------------------------------------------------------- + +@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on' +@echo off +@REM set title of command window +title %0 +@REM enable echoing my setting MAVEN_BATCH_ECHO to 'on' +@if "%MAVEN_BATCH_ECHO%" == "on" echo %MAVEN_BATCH_ECHO% + +@REM set %HOME% to equivalent of $HOME +if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%") + +@REM Execute a user defined script before this one +if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre +@REM check for pre script, once with legacy .bat ending and once with .cmd ending +if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat" +if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd" +:skipRcPre + +@setlocal + +set ERROR_CODE=0 + +@REM To isolate internal variables from possible post scripts, we use another setlocal +@setlocal + +@REM ==== START VALIDATION ==== +if not "%JAVA_HOME%" == "" goto OkJHome + +echo. +echo Error: JAVA_HOME not found in your environment. >&2 +echo Please set the JAVA_HOME variable in your environment to match the >&2 +echo location of your Java installation. >&2 +echo. +goto error + +:OkJHome +if exist "%JAVA_HOME%\bin\java.exe" goto init + +echo. +echo Error: JAVA_HOME is set to an invalid directory. >&2 +echo JAVA_HOME = "%JAVA_HOME%" >&2 +echo Please set the JAVA_HOME variable in your environment to match the >&2 +echo location of your Java installation. >&2 +echo. +goto error + +@REM ==== END VALIDATION ==== + +:init + +@REM Find the project base dir, i.e. the directory that contains the folder ".mvn". +@REM Fallback to current working directory if not found. + +set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR% +IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir + +set EXEC_DIR=%CD% +set WDIR=%EXEC_DIR% +:findBaseDir +IF EXIST "%WDIR%"\.mvn goto baseDirFound +cd .. +IF "%WDIR%"=="%CD%" goto baseDirNotFound +set WDIR=%CD% +goto findBaseDir + +:baseDirFound +set MAVEN_PROJECTBASEDIR=%WDIR% +cd "%EXEC_DIR%" +goto endDetectBaseDir + +:baseDirNotFound +set MAVEN_PROJECTBASEDIR=%EXEC_DIR% +cd "%EXEC_DIR%" + +:endDetectBaseDir + +IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig + +@setlocal EnableExtensions EnableDelayedExpansion +for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a +@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS% + +:endReadAdditionalConfig + +SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe" +set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar" +set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain + +set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.2/maven-wrapper-0.4.2.jar" +FOR /F "tokens=1,2 delims==" %%A IN (%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties) DO ( + IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B +) + +@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central +@REM This allows using the maven wrapper in projects that prohibit checking in binary data. +if exist %WRAPPER_JAR% ( + echo Found %WRAPPER_JAR% +) else ( + echo Couldn't find %WRAPPER_JAR%, downloading it ... + echo Downloading from: %DOWNLOAD_URL% + powershell -Command "(New-Object Net.WebClient).DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')" + echo Finished downloading %WRAPPER_JAR% +) +@REM End of extension + +%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %* +if ERRORLEVEL 1 goto error +goto end + +:error +set ERROR_CODE=1 + +:end +@endlocal & set ERROR_CODE=%ERROR_CODE% + +if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost +@REM check for post script, once with legacy .bat ending and once with .cmd ending +if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat" +if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd" +:skipRcPost + +@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on' +if "%MAVEN_BATCH_PAUSE%" == "on" pause + +if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE% + +exit /B %ERROR_CODE% diff --git a/chapter-05/pom.xml b/chapter-05/pom.xml new file mode 100644 index 0000000..798f14c --- /dev/null +++ b/chapter-05/pom.xml @@ -0,0 +1,105 @@ + + + 4.0.0 + + com.packt.distributed-tracing-chapter-05 + parent + 0.0.1-SNAPSHOT + pom + + Tracing Talk + Chapter 6 - Tracing Kafka + + + exercise1 + lib + + + + org.springframework.boot + spring-boot-starter-parent + 2.0.4.RELEASE + + + + + + UTF-8 + UTF-8 + 1.8 + + + + + + ${project.groupId} + lib + ${project.version} + + + + org.springframework.boot + spring-boot-starter-web + 2.0.4.RELEASE + + + org.springframework.kafka + spring-kafka + 2.1.8.RELEASE + + + org.apache.kafka + kafka-clients + 2.0.0 + + + com.fasterxml.jackson.core + jackson-databind + 2.9.4 + + + io.opentracing + opentracing-api + 0.31.0 + + + io.opentracing.contrib + opentracing-spring-cloud-starter + 0.1.13 + + + io.opentracing.contrib + opentracing-spring-tracer-configuration-starter + 0.1.0 + + + io.opentracing.contrib + opentracing-kafka-spring + 0.0.14 + + + io.opentracing.contrib + opentracing-redis-lettuce + 0.0.5 + + + io.jaegertracing + jaeger-client + 0.31.0 + + + + + + + + + org.springframework.boot + spring-boot-maven-plugin + + + + + + diff --git a/chapter-05/webapp/.babelrc b/chapter-05/webapp/.babelrc new file mode 100644 index 0000000..4c946e2 --- /dev/null +++ b/chapter-05/webapp/.babelrc @@ -0,0 +1,4 @@ +{ + "plugins": ["transform-class-properties"], + "presets": ["react"] +} diff --git a/chapter-05/webapp/.gitignore b/chapter-05/webapp/.gitignore new file mode 100644 index 0000000..1b29d9e --- /dev/null +++ b/chapter-05/webapp/.gitignore @@ -0,0 +1,5 @@ +.cache/ +dist/ +node_modules/ +yarn-error.log + diff --git a/chapter-05/webapp/actions/Messages.js b/chapter-05/webapp/actions/Messages.js new file mode 100644 index 0000000..ea4d666 --- /dev/null +++ b/chapter-05/webapp/actions/Messages.js @@ -0,0 +1,39 @@ +import dayjs from "dayjs" + +const chatApiUrl = "http://localhost:8080" +// const chatApiUrl = "http://16f5b228.ngrok.io" + +export const postData = (url = "", data = {}) => { + // Default options are marked with * + return fetch(url, { + method: "POST", // *GET, POST, PUT, DELETE, etc. + mode: "cors", // no-cors, cors, *same-origin + // cache: "no-cache", // *default, no-cache, reload, force-cache, only-if-cached + // credentials: "same-origin", // include, same-origin, *omit + headers: { + "Content-Type": "application/json", + Accept: "application/json" + }, + redirect: "follow", // manual, *follow, error + referrer: "no-referrer", // no-referrer, *client + body: JSON.stringify(data) // body data type must match "Content-Type" header + }) + .then(response => { + if (response.status > 400) { + throw new Error("Failed status code: " + response.status) + } + return response + }) + .then(response => response.json()) // parses response to JSON +} + +export const sendMessage = (author, room, message) => { + return postData(`${chatApiUrl}/message`, { + author, + room, + message + }) +} + +export const getMessages = () => + fetch(`${chatApiUrl}/message`).then(response => response.json()) diff --git a/chapter-05/webapp/app.js b/chapter-05/webapp/app.js new file mode 100644 index 0000000..cb43299 --- /dev/null +++ b/chapter-05/webapp/app.js @@ -0,0 +1,95 @@ +import React, { Component } from "react" +import ReactDOM from "react-dom" +import ChatRoom from "./components/ChatRoom" +import UserInput from "./components/UserInput" +import { sendMessage, getMessages } from "./actions/Messages" +import { Page, Header, HorizontalLayout } from "./components/Styled" +import ErrorBoundary from "./components/ErrorBoundary" + +class App extends Component { + state = { + title: "Tracing Talk", + user: "guest-" + Math.floor(Math.random() * 1000), + room: { + name: "lobby", + messages: [ + { + id: "a", + date: "2018-08-16T08:00:31-04:00", + author: "Ralph", + message: "👋 Hey, there!" + }, + { + id: "b", + date: "2018-08-16T08:02:31-04:00", + author: "Johnny", + message: "Hello!", + image: "https://media.giphy.com/media/mIZ9rPeMKefm0/giphy.gif" + } + ] + } + } + + componentDidMount() { + this.refreshMessages() + this.interval = setInterval(() => { + this.refreshMessages() + }, 3000) + } + + componentWillUnmount() { + clearInterval(this.interval) + } + + refreshMessages() { + return getMessages().then(messages => + this.setState(state => { + state.room.messages = messages + return state + }) + ) + } + + userInputChange(e) { + this.setState({ user: e.target.value }) + } + + send(message) { + if (message) { + sendMessage(this.state.user, this.state.room.name, message).then( + savedMessage => { + this.setState(state => { + state.room.messages.push(savedMessage) + return state + }) + } + ) + } + } + + render() { + return ( + + + {this.state.title} + +
{this.state.title}
+ this.userInputChange(e)} + /> + + + this.send(message)} + /> + + + + ) + } +} + +ReactDOM.render(, document.getElementById("app")) diff --git a/chapter-05/webapp/components/ChatInput.js b/chapter-05/webapp/components/ChatInput.js new file mode 100644 index 0000000..734f9f8 --- /dev/null +++ b/chapter-05/webapp/components/ChatInput.js @@ -0,0 +1,38 @@ +import React, { Component } from "react" +import { Button, MessageInput } from "./Styled" +export default class ChatInput extends Component { + state = { + message: "" + } + + buttonRef = React.createRef() + onChange(e) { + this.setState({ message: e.target.value }) + } + + sendMessage(e) { + e.preventDefault() + this.props.sendMessage(this.state.message) + this.setState({ message: "" }) + } + + componentDidUpdate() { + this.buttonRef.current.scrollIntoView({ behavior: "smooth" }) + } + + render() { + return ( +
this.sendMessage(e)}> + this.onChange(e)} + /> + + + ) + } +} diff --git a/chapter-05/webapp/components/ChatRoom.js b/chapter-05/webapp/components/ChatRoom.js new file mode 100644 index 0000000..eebb470 --- /dev/null +++ b/chapter-05/webapp/components/ChatRoom.js @@ -0,0 +1,24 @@ +import React, { Component } from "react" +import { RoomName, MessageList, HorizontalLayout } from "./Styled" +import ChatInput from "./ChatInput" +import Message from "./Message" + +export default class ChatRoom extends Component { + render() { + return ( +
+ {/*{this.props.room.name}*/} + + + {this.props.room.messages.map(message => ( + + ))} + + + + + +
+ ) + } +} diff --git a/chapter-05/webapp/components/ErrorBoundary.js b/chapter-05/webapp/components/ErrorBoundary.js new file mode 100644 index 0000000..1b4721b --- /dev/null +++ b/chapter-05/webapp/components/ErrorBoundary.js @@ -0,0 +1,21 @@ +import React, { Component } from "react" + +export default class ErrorBoundary extends Component { + constructor(props) { + super(props) + this.state = { hasError: false } + } + + componentDidCatch(error, info) { + // Display fallback UI + this.setState({ hasError: true }) + } + + render() { + if (this.state.hasError) { + // You can render any custom fallback UI + return

Something went wrong. Make sure chat-api server is running.

+ } + return this.props.children + } +} diff --git a/chapter-05/webapp/components/Message.js b/chapter-05/webapp/components/Message.js new file mode 100644 index 0000000..942d6a5 --- /dev/null +++ b/chapter-05/webapp/components/Message.js @@ -0,0 +1,28 @@ +import React, { Component } from "react" +import dayjs from "dayjs" +import relativeTime from "dayjs/plugin/relativeTime" +dayjs.extend(relativeTime) +import { + TimeAgo, + Author, + MessageText, + HorizontalLayout, + MessageWrapper, + Image, + ImageWrapper +} from "./Styled" + +export default ({ message }) => ( + + + + {message.author}{" "} + {message.message} + + {dayjs(message.date).fromNow()} + + + {message.image ? : null} + + +) diff --git a/chapter-05/webapp/components/Styled.js b/chapter-05/webapp/components/Styled.js new file mode 100644 index 0000000..352e1b2 --- /dev/null +++ b/chapter-05/webapp/components/Styled.js @@ -0,0 +1,120 @@ +import styled, { injectGlobal } from "styled-components" +const mainColor = "#0a5" +const secondaryColor = "white" +const pageWidth = "40em" + +injectGlobal` + html { + background-color: white; + color: black; + font-size: 1.3vw; + font-family: 'Lato', sans-serif; + } +` + +export const Space = styled.div` + width: ${({ marginLeft }) => marginLeft}; + /* margin-left: ${({ marginLeft }) => marginLeft}; */ +` + +export const Page = styled.div` + display: flex; + justify-content: center; + flex-direction: column; +` + +export const HorizontalLayout = styled.div` + display: flex; + flex-direction: row; + align-items: flex-end; + justify-content: ${({ justifyContent = "space-between" }) => justifyContent}; +` + +export const Header = styled.div` + font-size: 5em; + font-weight: bolder; + color: ${mainColor}; +` + +export const RoomName = styled.h2` + color: ${mainColor}; +` + +export const MessageList = styled.ul` + width: ${pageWidth} + list-style-type: none; + padding-left: 0; +` + +export const MessageWrapper = styled.li` + margin-bottom: 0.5em; + &:hover { + color: ${mainColor}; + } +` + +export const Image = styled.img` + height: 10em; +` + +export const ImageWrapper = styled.div` + margin-top: 0.5em; +` + +export const Author = styled.label` + color: ${mainColor}; + /* font-size: 0.8em; */ + height: 1.1em; + width: 6em; + text-overflow: ellipsis; + white-space: nowrap; + overflow: hidden; + line-height: 100%; + /* background: brown; */ + /* text-transform: uppercase; */ +` + +export const MessageText = styled.label` + font-weight: bolder; + height: 1.1em; + line-height: 100%; +` + +export const TimeAgo = styled.label` + font-size: 0.7em; + color: gray; + line-height: 100%; +` + +export const NicknameInput = styled.input` + margin: 0; + width: 100; + height: 26; +` + +export const MessageInput = styled.input` + margin-top: 0; + width: 46.8em; + height: 32px; + line-height: 32px; + padding-left: 8px; + border: 1px solid ${mainColor}; + font-family: "Lato", sans-serif; + font-size: 0.8em; + font-weight: bold; + vertical-align: bottom; +` + +export const Button = styled.button` + margin: 0; + width: 50px; + height: 32px; + line-height: 32px; + color: ${secondaryColor}; + background-color: ${mainColor}; + font-family: "Lato", sans-serif; + text-transform: uppercase; + letter-spacing: 0.2em; + border: 0; + padding: 0; +` diff --git a/chapter-05/webapp/components/UserInput.js b/chapter-05/webapp/components/UserInput.js new file mode 100644 index 0000000..2f37c47 --- /dev/null +++ b/chapter-05/webapp/components/UserInput.js @@ -0,0 +1,52 @@ +import React, { Component } from "react" +import styled from "styled-components" + +import { + NicknameInput, + Button, + Author, + HorizontalLayout, + Space +} from "./Styled" + +export default class UserInput extends Component { + state = { + isEditing: false + } + + userRef = React.createRef() + + isEditing(e) { + e.preventDefault() + this.setState(state => { + if (this.props.user) return { isEditing: !state.isEditing } + else return state + }) + } + + render() { + return ( +
this.isEditing(e)}> + + + + {this.state.isEditing ? ( + this.props.onChange(e)} + onFocus={e => this.userRef.current.select()} + /> + ) : ( + {this.props.user} + )} + + + +
+ ) + } +} diff --git a/chapter-05/webapp/favicon.ico b/chapter-05/webapp/favicon.ico new file mode 100644 index 0000000..9a0dd01 Binary files /dev/null and b/chapter-05/webapp/favicon.ico differ diff --git a/chapter-05/webapp/index.html b/chapter-05/webapp/index.html new file mode 100644 index 0000000..61bd997 --- /dev/null +++ b/chapter-05/webapp/index.html @@ -0,0 +1,16 @@ + + + + + + + + + + + +
+ + + + \ No newline at end of file diff --git a/chapter-05/webapp/package.json b/chapter-05/webapp/package.json new file mode 100644 index 0000000..420ea8d --- /dev/null +++ b/chapter-05/webapp/package.json @@ -0,0 +1,22 @@ +{ + "name": "webapp", + "version": "1.0.0", + "main": "index.js", + "license": "MIT", + "scripts": { + "dev": "parcel index.html", + "build": "parcel build index.html" + }, + "dependencies": { + "dayjs": "^1.7.5", + "formik": "^1.0.3", + "react": "^16.4.2", + "react-dom": "^16.4.2", + "styled-components": "^3.4.2" + }, + "devDependencies": { + "babel-plugin-transform-class-properties": "^6.24.1", + "babel-preset-react": "^6.24.1", + "parcel-bundler": "^1.9.7" + } +} diff --git a/chapter-05/webapp/public/app.6b3e1769.js b/chapter-05/webapp/public/app.6b3e1769.js new file mode 100644 index 0000000..b3defaa --- /dev/null +++ b/chapter-05/webapp/public/app.6b3e1769.js @@ -0,0 +1,80 @@ +parcelRequire=function(e,r,n,t){var i="function"==typeof 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"https://registry.yarnpkg.com/wordwrap/-/wordwrap-1.0.0.tgz#27584810891456a4171c8d0226441ade90cbcaeb" + +wrappy@1: + version "1.0.2" + resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f" + +ws@^5.1.1: + version "5.2.2" + resolved "https://registry.yarnpkg.com/ws/-/ws-5.2.2.tgz#dffef14866b8e8dc9133582514d1befaf96e980f" + dependencies: + async-limiter "~1.0.0" + +xtend@^4.0.0, xtend@~4.0.1: + version "4.0.1" + resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.1.tgz#a5c6d532be656e23db820efb943a1f04998d63af" + +yallist@^3.0.0, yallist@^3.0.2: + version "3.0.2" + resolved "https://registry.yarnpkg.com/yallist/-/yallist-3.0.2.tgz#8452b4bb7e83c7c188d8041c1a837c773d6d8bb9" diff --git a/chapter-07/.gitignore b/chapter-07/.gitignore new file mode 100644 index 0000000..d11829c --- /dev/null +++ b/chapter-07/.gitignore @@ -0,0 +1,4 @@ +.classpath +.project +.settings/ +target/ diff --git a/chapter-07/.mvn/wrapper/.gitignore b/chapter-07/.mvn/wrapper/.gitignore new file mode 100644 index 0000000..e72f5e8 --- /dev/null +++ b/chapter-07/.mvn/wrapper/.gitignore @@ -0,0 +1 @@ +maven-wrapper.jar diff --git a/chapter-07/.mvn/wrapper/MavenWrapperDownloader.java b/chapter-07/.mvn/wrapper/MavenWrapperDownloader.java new file mode 100755 index 0000000..fa4f7b4 --- /dev/null +++ b/chapter-07/.mvn/wrapper/MavenWrapperDownloader.java @@ -0,0 +1,110 @@ +/* +Licensed to the Apache Software Foundation (ASF) under one +or more contributor license agreements. See the NOTICE file +distributed with this work for additional information +regarding copyright ownership. The ASF licenses this file +to you under the Apache License, Version 2.0 (the +"License"); you may not use this file except in compliance +with the License. You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, +software distributed under the License is distributed on an +"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +KIND, either express or implied. See the License for the +specific language governing permissions and limitations +under the License. +*/ + +import java.net.*; +import java.io.*; +import java.nio.channels.*; +import java.util.Properties; + +public class MavenWrapperDownloader { + + /** + * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided. + */ + private static final String DEFAULT_DOWNLOAD_URL = + "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.2/maven-wrapper-0.4.2.jar"; + + /** + * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to + * use instead of the default one. + */ + private static final String MAVEN_WRAPPER_PROPERTIES_PATH = + ".mvn/wrapper/maven-wrapper.properties"; + + /** + * Path where the maven-wrapper.jar will be saved to. + */ + private static final String MAVEN_WRAPPER_JAR_PATH = + ".mvn/wrapper/maven-wrapper.jar"; + + /** + * Name of the property which should be used to override the default download url for the wrapper. + */ + private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl"; + + public static void main(String args[]) { + System.out.println("- Downloader started"); + File baseDirectory = new File(args[0]); + System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath()); + + // If the maven-wrapper.properties exists, read it and check if it contains a custom + // wrapperUrl parameter. + File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH); + String url = DEFAULT_DOWNLOAD_URL; + if(mavenWrapperPropertyFile.exists()) { + FileInputStream mavenWrapperPropertyFileInputStream = null; + try { + mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile); + Properties mavenWrapperProperties = new Properties(); + mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream); + url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url); + } catch (IOException e) { + System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'"); + } finally { + try { + if(mavenWrapperPropertyFileInputStream != null) { + mavenWrapperPropertyFileInputStream.close(); + } + } catch (IOException e) { + // Ignore ... + } + } + } + System.out.println("- Downloading from: : " + url); + + File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH); + if(!outputFile.getParentFile().exists()) { + if(!outputFile.getParentFile().mkdirs()) { + System.out.println( + "- ERROR creating output direcrory '" + outputFile.getParentFile().getAbsolutePath() + "'"); + } + } + System.out.println("- Downloading to: " + outputFile.getAbsolutePath()); + try { + downloadFileFromURL(url, outputFile); + System.out.println("Done"); + System.exit(0); + } catch (Throwable e) { + System.out.println("- Error downloading"); + e.printStackTrace(); + System.exit(1); + } + } + + private static void downloadFileFromURL(String urlString, File destination) throws Exception { + URL website = new URL(urlString); + ReadableByteChannel rbc; + rbc = Channels.newChannel(website.openStream()); + FileOutputStream fos = new FileOutputStream(destination); + fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE); + fos.close(); + rbc.close(); + } + +} diff --git a/chapter-07/.mvn/wrapper/maven-wrapper.properties b/chapter-07/.mvn/wrapper/maven-wrapper.properties new file mode 100755 index 0000000..00d32aa --- /dev/null +++ b/chapter-07/.mvn/wrapper/maven-wrapper.properties @@ -0,0 +1 @@ +distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.5.4/apache-maven-3.5.4-bin.zip \ No newline at end of file diff --git a/chapter-07/Dockerfile b/chapter-07/Dockerfile new file mode 100644 index 0000000..b1e9443 --- /dev/null +++ b/chapter-07/Dockerfile @@ -0,0 +1,27 @@ +FROM openjdk:alpine + +ENV APP_HOME /app/ + +COPY exercise1/hello/target/hello-1-0.0.1-SNAPSHOT.jar $APP_HOME/hello.jar +COPY exercise1/formatter/target/formatter-1-0.0.1-SNAPSHOT.jar $APP_HOME/formatter.jar + +WORKDIR $APP_HOME + +EXPOSE 8080 + +# Env variables must be set when starting the container: +# Always: +# app_name = hello | formatter +# Hello: +# formatter_host = localhost +# formatter_port = 8080 +# Formatter: +# professor = false | true +CMD java \ + -DJAEGER_SERVICE_NAME=${app_name} \ + -DJAEGER_PROPAGATION=b3 \ + -DJAEGER_ENDPOINT=http://jaeger-collector.istio-system:14268/api/traces \ + -Dformatter.host=${formatter_host:-formatter} \ + -Dformatter.port=${formatter_port:-8080} \ + -Dprofessor=${professor:-false} \ + -jar ${app_name:?'app_name must be set'}.jar diff --git a/chapter-07/Makefile b/chapter-07/Makefile new file mode 100644 index 0000000..2f5b4c5 --- /dev/null +++ b/chapter-07/Makefile @@ -0,0 +1,41 @@ +build-app: + mvn install + docker build -t hello-app:latest . + @echo '*** make sure the right docker repository is used' + @echo '*** on minikube run this first: eval $$(minikube docker-env)' + +deploy-app: + istioctl kube-inject -f app.yml | kubectl apply -f - + kubectl apply -f gateway.yml + istioctl create -f routing.yml + +delete-app: + istioctl delete -f routing.yml + kubectl delete -f app.yml + +hostport: + @echo export GATEWAY_URL=$$(minikube ip):$$(kubectl \ + get service -n istio-system istio-ingressgateway \ + -o jsonpath='{.spec.ports[?(@.name=="http2")].nodePort}') + +jaeger: + kubectl port-forward -n istio-system $$(kubectl \ + get pod -n istio-system -l app=jaeger \ + -o jsonpath='{.items[0].metadata.name}') 16686:16686 + +service-graph: + kubectl -n istio-system port-forward $$(kubectl \ + get pod -n istio-system -l app=servicegraph \ + -o jsonpath='{.items[0].metadata.name}') 8088:8088 + +logs-hello: + kubectl logs $$(kubectl get pod -l app=hello-svc \ + -o jsonpath='{.items[0].metadata.name}') hello-svc + +logs-formatter-v1: + kubectl logs $$(kubectl get pod -l app=formatter-svc -l version=v1 \ + -o jsonpath='{.items[0].metadata.name}') formatter-svc + +logs-formatter-v2: + kubectl logs $$(kubectl get pod -l app=formatter-svc -l version=v2 \ + -o jsonpath='{.items[0].metadata.name}') formatter-svc diff --git a/chapter-07/app.yml b/chapter-07/app.yml new file mode 100644 index 0000000..40ea471 --- /dev/null +++ b/chapter-07/app.yml @@ -0,0 +1,104 @@ +################################################################################################## +# Hello service +################################################################################################## +apiVersion: v1 +kind: Service +metadata: + name: hello-svc + labels: + app: hello-svc +spec: + # type: LoadBalancer + selector: + app: hello-svc + ports: + - name: http + port: 8080 +--- +apiVersion: extensions/v1beta1 +kind: Deployment +metadata: + name: hello-svc +spec: + replicas: 1 + template: + metadata: + labels: + app: hello-svc + spec: + containers: + - name: hello-svc + image: hello-app:latest + imagePullPolicy: Never + ports: + - name: http + containerPort: 8080 + env: + - name: app_name + value: "hello" + - name: formatter_host + value: "formatter-svc" +--- +################################################################################################## +# Formatter service v1/v2 +################################################################################################## +apiVersion: v1 +kind: Service +metadata: + name: formatter-svc + labels: + app: formatter-svc +spec: + selector: + app: formatter-svc + ports: + - name: http + port: 8080 +--- +apiVersion: extensions/v1beta1 +kind: Deployment +metadata: + name: formatter-svc-v1 +spec: + replicas: 1 + template: + metadata: + labels: + app: formatter-svc + version: v1 + spec: + containers: + - name: formatter-svc + image: hello-app:latest + imagePullPolicy: Never + ports: + - name: http + containerPort: 8080 + env: + - name: app_name + value: "formatter" +--- +apiVersion: extensions/v1beta1 +kind: Deployment +metadata: + name: formatter-svc-v2 +spec: + replicas: 1 + template: + metadata: + labels: + app: formatter-svc + version: v2 + spec: + containers: + - name: formatter-svc + image: hello-app:latest + imagePullPolicy: Never + ports: + - name: http + containerPort: 8080 + env: + - name: app_name + value: "formatter" + - name: professor + value: "true" diff --git a/chapter-07/exercise1/formatter/pom.xml b/chapter-07/exercise1/formatter/pom.xml new file mode 100644 index 0000000..74bdf43 --- /dev/null +++ b/chapter-07/exercise1/formatter/pom.xml @@ -0,0 +1,55 @@ + + + 4.0.0 + + com.packt.distributed-tracing-chapter-07 + formatter-1 + jar + + + com.packt.distributed-tracing-chapter-07 + exercise1 + 0.0.1-SNAPSHOT + ../ + + + + UTF-8 + UTF-8 + 1.8 + ${project.basedir}/.. + + + + + org.springframework.boot + spring-boot-starter-web + + + io.opentracing.contrib + opentracing-spring-cloud-starter + + + io.opentracing.contrib + opentracing-spring-tracer-configuration-starter + + + io.jaegertracing + jaeger-client + + + io.jaegertracing + jaeger-zipkin + + + + + + + org.springframework.boot + spring-boot-maven-plugin + + + + diff --git a/chapter-07/exercise1/formatter/src/main/java/formatter/FApp.java b/chapter-07/exercise1/formatter/src/main/java/formatter/FApp.java new file mode 100644 index 0000000..4a59e24 --- /dev/null +++ b/chapter-07/exercise1/formatter/src/main/java/formatter/FApp.java @@ -0,0 +1,12 @@ +package formatter; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; + +@SpringBootApplication +public class FApp { + + public static void main(String[] args) { + SpringApplication.run(FApp.class, args); + } +} diff --git a/chapter-07/exercise1/formatter/src/main/java/formatter/FController.java b/chapter-07/exercise1/formatter/src/main/java/formatter/FController.java new file mode 100644 index 0000000..8e66833 --- /dev/null +++ b/chapter-07/exercise1/formatter/src/main/java/formatter/FController.java @@ -0,0 +1,29 @@ +package formatter; + +import org.springframework.http.HttpHeaders; +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.RequestHeader; +import org.springframework.web.bind.annotation.RequestParam; +import org.springframework.web.bind.annotation.RestController; + +@RestController +public class FController { + + private final String template; + + public FController() { + if (Boolean.getBoolean("professor")) { + template = "Good news, %s! If anyone needs me I'll be in the Angry Dome!"; + } else { + template = "Hello, puny human %s! Morbo asks: how do you like running on Kubernetes?"; + } + System.out.println("Using template: " + template); + } + + @GetMapping("/formatGreeting") + public String formatGreeting(@RequestParam String name, @RequestHeader HttpHeaders headers) { + System.out.println("Headers: " + headers); + + return String.format(template, name); + } +} diff --git a/chapter-07/exercise1/hello/pom.xml b/chapter-07/exercise1/hello/pom.xml new file mode 100644 index 0000000..f9e5786 --- /dev/null +++ b/chapter-07/exercise1/hello/pom.xml @@ -0,0 +1,55 @@ + + + 4.0.0 + + com.packt.distributed-tracing-chapter-07 + hello-1 + jar + + + com.packt.distributed-tracing-chapter-07 + exercise1 + 0.0.1-SNAPSHOT + ../ + + + + UTF-8 + UTF-8 + 1.8 + ${project.basedir}/.. + + + + + org.springframework.boot + spring-boot-starter-web + + + io.opentracing.contrib + opentracing-spring-cloud-starter + + + io.opentracing.contrib + opentracing-spring-tracer-configuration-starter + + + io.jaegertracing + jaeger-client + + + io.jaegertracing + jaeger-zipkin + + + + + + + org.springframework.boot + spring-boot-maven-plugin + + + + diff --git a/chapter-07/exercise1/hello/src/main/java/hello/HelloApp.java b/chapter-07/exercise1/hello/src/main/java/hello/HelloApp.java new file mode 100644 index 0000000..7041356 --- /dev/null +++ b/chapter-07/exercise1/hello/src/main/java/hello/HelloApp.java @@ -0,0 +1,20 @@ +package hello; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.boot.web.client.RestTemplateBuilder; +import org.springframework.context.annotation.Bean; +import org.springframework.web.client.RestTemplate; + +@SpringBootApplication +public class HelloApp { + + @Bean + public RestTemplate restTemplate(RestTemplateBuilder restTemplateBuilder) { + return restTemplateBuilder.build(); + } + + public static void main(String[] args) { + SpringApplication.run(HelloApp.class, args); + } +} diff --git a/chapter-07/exercise1/hello/src/main/java/hello/HelloController.java b/chapter-07/exercise1/hello/src/main/java/hello/HelloController.java new file mode 100644 index 0000000..f3bee9f --- /dev/null +++ b/chapter-07/exercise1/hello/src/main/java/hello/HelloController.java @@ -0,0 +1,56 @@ +package hello; + +import java.net.URI; +import java.util.Collections; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.http.HttpHeaders; +import org.springframework.http.ResponseEntity; +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.PathVariable; +import org.springframework.web.bind.annotation.RequestHeader; +import org.springframework.web.bind.annotation.RestController; +import org.springframework.web.client.RestTemplate; +import org.springframework.web.util.UriComponentsBuilder; + +import io.opentracing.Span; + +@RestController +public class HelloController { + + private final String formatterUrl; + + public HelloController() { + String host = System.getProperty("formatter.host", "localhost"); + String port = System.getProperty("formatter.port", "8080"); + formatterUrl = "http://" + host + ":" + port + "/formatGreeting"; + } + + @Autowired + private RestTemplate restTemplate; + + @Autowired + private io.opentracing.Tracer tracer; + + @GetMapping("/sayHello/{name}") + public String sayHello(@PathVariable String name, @RequestHeader HttpHeaders headers) { + System.out.println("Headers: " + headers); + + Span span = tracer.activeSpan(); + if (span != null) { + span.setBaggageItem("user-agent", headers.getFirst(HttpHeaders.USER_AGENT)); + } + + String response = formatGreeting(name); + return response; + } + + private String formatGreeting(String name) { + URI uri = UriComponentsBuilder // + .fromHttpUrl(formatterUrl) // + .queryParam("name", name) // + .build(Collections.emptyMap()); + ResponseEntity response = restTemplate.getForEntity(uri, String.class); + return response.getBody(); + } +} diff --git a/chapter-07/exercise1/hello/src/main/java/hello/HelloController2.java b/chapter-07/exercise1/hello/src/main/java/hello/HelloController2.java new file mode 100644 index 0000000..5113240 --- /dev/null +++ b/chapter-07/exercise1/hello/src/main/java/hello/HelloController2.java @@ -0,0 +1,72 @@ +package hello; + +import java.net.URI; +import java.util.Collections; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.http.HttpEntity; +import org.springframework.http.HttpHeaders; +import org.springframework.http.HttpMethod; +import org.springframework.http.ResponseEntity; +import org.springframework.web.bind.annotation.GetMapping; +import org.springframework.web.bind.annotation.PathVariable; +import org.springframework.web.bind.annotation.RequestHeader; +import org.springframework.web.bind.annotation.RestController; +import org.springframework.web.client.RestTemplate; +import org.springframework.web.util.UriComponentsBuilder; + +@RestController +public class HelloController2 { + + private final String formatterUrl; + + public HelloController2() { + String host = System.getProperty("formatter.host", "localhost"); + String port = System.getProperty("formatter.port", "8080"); + formatterUrl = "http://" + host + ":" + port + "/formatGreeting"; + } + + @Autowired + private RestTemplate restTemplate; + + @GetMapping("/sayHello2/{name}") + public String sayHello(@PathVariable String name, @RequestHeader HttpHeaders headers) { + System.out.println("Headers: " + headers); + + String response = formatGreeting(name, copyHeaders(headers)); + return response; + } + + private String formatGreeting(String name, HttpHeaders tracingHeaders) { + URI uri = UriComponentsBuilder // + .fromHttpUrl(formatterUrl) // + .queryParam("name", name) // + .build(Collections.emptyMap()); + + ResponseEntity response = restTemplate.exchange( // + uri, HttpMethod.GET, new HttpEntity<>(tracingHeaders), // + String.class); + return response.getBody(); + } + + private final static String[] tracingHeaderKeys = { // + "x-request-id", // + "x-b3-traceid", // + "x-b3-spanid", // + "x-b3-parentspanid", // + "x-b3-sampled", // + "x-b3-flags", // + "x-ot-span-context" // + }; + + private HttpHeaders copyHeaders(HttpHeaders headers) { + HttpHeaders tracingHeaders = new HttpHeaders(); + for (String key : tracingHeaderKeys) { + String value = headers.getFirst(key); + if (value != null) { + tracingHeaders.add(key, value); + } + } + return tracingHeaders; + } +} diff --git a/chapter-07/exercise1/pom.xml b/chapter-07/exercise1/pom.xml new file mode 100644 index 0000000..9fd5b28 --- /dev/null +++ b/chapter-07/exercise1/pom.xml @@ -0,0 +1,23 @@ + + + 4.0.0 + + com.packt.distributed-tracing-chapter-07 + exercise1 + pom + + + hello + formatter + + + + com.packt.distributed-tracing-chapter-07 + parent + 0.0.1-SNAPSHOT + ../ + + + + diff --git a/chapter-07/gateway.yml b/chapter-07/gateway.yml new file mode 100644 index 0000000..c24ce39 --- /dev/null +++ b/chapter-07/gateway.yml @@ -0,0 +1,35 @@ +apiVersion: networking.istio.io/v1alpha3 +kind: Gateway +metadata: + name: hello-app-gateway +spec: + selector: + istio: ingressgateway # use istio default controller + servers: + - port: + number: 8080 + name: http + protocol: HTTP + hosts: + - "*" +--- +apiVersion: networking.istio.io/v1alpha3 +kind: VirtualService +metadata: + name: hello-app +spec: + hosts: + - "*" + gateways: + - hello-app-gateway + http: + - match: + - uri: + prefix: /sayHello + - uri: + prefix: /sayHello2 + route: + - destination: + host: hello-svc + port: + number: 8080 diff --git a/chapter-07/mvnw b/chapter-07/mvnw new file mode 100755 index 0000000..5551fde --- /dev/null +++ b/chapter-07/mvnw @@ -0,0 +1,286 @@ +#!/bin/sh +# ---------------------------------------------------------------------------- +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. +# ---------------------------------------------------------------------------- + +# ---------------------------------------------------------------------------- +# Maven2 Start Up Batch script +# +# Required ENV vars: +# ------------------ +# JAVA_HOME - location of a JDK home dir +# +# Optional ENV vars +# ----------------- +# M2_HOME - location of maven2's installed home dir +# MAVEN_OPTS - parameters passed to the Java VM when running Maven +# e.g. to debug Maven itself, use +# set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000 +# MAVEN_SKIP_RC - flag to disable loading of mavenrc files +# ---------------------------------------------------------------------------- + +if [ -z "$MAVEN_SKIP_RC" ] ; then + + if [ -f /etc/mavenrc ] ; then + . /etc/mavenrc + fi + + if [ -f "$HOME/.mavenrc" ] ; then + . "$HOME/.mavenrc" + fi + +fi + +# OS specific support. $var _must_ be set to either true or false. +cygwin=false; +darwin=false; +mingw=false +case "`uname`" in + CYGWIN*) cygwin=true ;; + MINGW*) mingw=true;; + Darwin*) darwin=true + # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home + # See https://developer.apple.com/library/mac/qa/qa1170/_index.html + if [ -z "$JAVA_HOME" ]; then + if [ -x "/usr/libexec/java_home" ]; then + export JAVA_HOME="`/usr/libexec/java_home`" + else + export JAVA_HOME="/Library/Java/Home" + fi + fi + ;; +esac + +if [ -z "$JAVA_HOME" ] ; then + if [ -r /etc/gentoo-release ] ; then + JAVA_HOME=`java-config --jre-home` + fi +fi + +if [ -z "$M2_HOME" ] ; then + ## resolve links - $0 may be a link to maven's home + PRG="$0" + + # need this for relative symlinks + while [ -h "$PRG" ] ; do + ls=`ls -ld "$PRG"` + link=`expr "$ls" : '.*-> \(.*\)$'` + if expr "$link" : '/.*' > /dev/null; then + PRG="$link" + else + PRG="`dirname "$PRG"`/$link" + fi + done + + saveddir=`pwd` + + M2_HOME=`dirname "$PRG"`/.. + + # make it fully qualified + M2_HOME=`cd "$M2_HOME" && pwd` + + cd "$saveddir" + # echo Using m2 at $M2_HOME +fi + +# For Cygwin, ensure paths are in UNIX format before anything is touched +if $cygwin ; then + [ -n "$M2_HOME" ] && + M2_HOME=`cygpath --unix "$M2_HOME"` + [ -n "$JAVA_HOME" ] && + JAVA_HOME=`cygpath --unix "$JAVA_HOME"` + [ -n "$CLASSPATH" ] && + CLASSPATH=`cygpath --path --unix "$CLASSPATH"` +fi + +# For Mingw, ensure paths are in UNIX format before anything is touched +if $mingw ; then + [ -n "$M2_HOME" ] && + M2_HOME="`(cd "$M2_HOME"; pwd)`" + [ -n "$JAVA_HOME" ] && + JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`" + # TODO classpath? +fi + +if [ -z "$JAVA_HOME" ]; then + javaExecutable="`which javac`" + if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then + # readlink(1) is not available as standard on Solaris 10. + readLink=`which readlink` + if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then + if $darwin ; then + javaHome="`dirname \"$javaExecutable\"`" + javaExecutable="`cd \"$javaHome\" && pwd -P`/javac" + else + javaExecutable="`readlink -f \"$javaExecutable\"`" + fi + javaHome="`dirname \"$javaExecutable\"`" + javaHome=`expr "$javaHome" : '\(.*\)/bin'` + JAVA_HOME="$javaHome" + export JAVA_HOME + fi + fi +fi + +if [ -z "$JAVACMD" ] ; then + if [ -n "$JAVA_HOME" ] ; then + if [ -x "$JAVA_HOME/jre/sh/java" ] ; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD="$JAVA_HOME/jre/sh/java" + else + JAVACMD="$JAVA_HOME/bin/java" + fi + else + JAVACMD="`which java`" + fi +fi + +if [ ! -x "$JAVACMD" ] ; then + echo "Error: JAVA_HOME is not defined correctly." >&2 + echo " We cannot execute $JAVACMD" >&2 + exit 1 +fi + +if [ -z "$JAVA_HOME" ] ; then + echo "Warning: JAVA_HOME environment variable is not set." +fi + +CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher + +# traverses directory structure from process work directory to filesystem root +# first directory with .mvn subdirectory is considered project base directory +find_maven_basedir() { + + if [ -z "$1" ] + then + echo "Path not specified to find_maven_basedir" + return 1 + fi + + basedir="$1" + wdir="$1" + while [ "$wdir" != '/' ] ; do + if [ -d "$wdir"/.mvn ] ; then + basedir=$wdir + break + fi + # workaround for JBEAP-8937 (on Solaris 10/Sparc) + if [ -d "${wdir}" ]; then + wdir=`cd "$wdir/.."; pwd` + fi + # end of workaround + done + echo "${basedir}" +} + +# concatenates all lines of a file +concat_lines() { + if [ -f "$1" ]; then + echo "$(tr -s '\n' ' ' < "$1")" + fi +} + +BASE_DIR=`find_maven_basedir "$(pwd)"` +if [ -z "$BASE_DIR" ]; then + exit 1; +fi + +########################################################################################## +# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central +# This allows using the maven wrapper in projects that prohibit checking in binary data. +########################################################################################## +if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then + if [ "$MVNW_VERBOSE" = true ]; then + echo "Found .mvn/wrapper/maven-wrapper.jar" + fi +else + if [ "$MVNW_VERBOSE" = true ]; then + echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..." + fi + jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.2/maven-wrapper-0.4.2.jar" + while IFS="=" read key value; do + case "$key" in (wrapperUrl) jarUrl="$value"; break ;; + esac + done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties" + if [ "$MVNW_VERBOSE" = true ]; then + echo "Downloading from: $jarUrl" + fi + wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" + + if command -v wget > /dev/null; then + if [ "$MVNW_VERBOSE" = true ]; then + echo "Found wget ... using wget" + fi + wget "$jarUrl" -O "$wrapperJarPath" + elif command -v curl > /dev/null; then + if [ "$MVNW_VERBOSE" = true ]; then + echo "Found curl ... using curl" + fi + curl -o "$wrapperJarPath" "$jarUrl" + else + if [ "$MVNW_VERBOSE" = true ]; then + echo "Falling back to using Java to download" + fi + javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java" + if [ -e "$javaClass" ]; then + if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then + if [ "$MVNW_VERBOSE" = true ]; then + echo " - Compiling MavenWrapperDownloader.java ..." + fi + # Compiling the Java class + ("$JAVA_HOME/bin/javac" "$javaClass") + fi + if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then + # Running the downloader + if [ "$MVNW_VERBOSE" = true ]; then + echo " - Running MavenWrapperDownloader.java ..." + fi + ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR") + fi + fi + fi +fi +########################################################################################## +# End of extension +########################################################################################## + +export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"} +if [ "$MVNW_VERBOSE" = true ]; then + echo $MAVEN_PROJECTBASEDIR +fi +MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS" + +# For Cygwin, switch paths to Windows format before running java +if $cygwin; then + [ -n "$M2_HOME" ] && + M2_HOME=`cygpath --path --windows "$M2_HOME"` + [ -n "$JAVA_HOME" ] && + JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"` + [ -n "$CLASSPATH" ] && + CLASSPATH=`cygpath --path --windows "$CLASSPATH"` + [ -n "$MAVEN_PROJECTBASEDIR" ] && + MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"` +fi + +WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain + +exec "$JAVACMD" \ + $MAVEN_OPTS \ + -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \ + "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \ + ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@" diff --git a/chapter-07/mvnw.cmd b/chapter-07/mvnw.cmd new file mode 100755 index 0000000..48363fa --- /dev/null +++ b/chapter-07/mvnw.cmd @@ -0,0 +1,161 @@ +@REM ---------------------------------------------------------------------------- +@REM Licensed to the Apache Software Foundation (ASF) under one +@REM or more contributor license agreements. See the NOTICE file +@REM distributed with this work for additional information +@REM regarding copyright ownership. The ASF licenses this file +@REM to you under the Apache License, Version 2.0 (the +@REM "License"); you may not use this file except in compliance +@REM with the License. You may obtain a copy of the License at +@REM +@REM http://www.apache.org/licenses/LICENSE-2.0 +@REM +@REM Unless required by applicable law or agreed to in writing, +@REM software distributed under the License is distributed on an +@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +@REM KIND, either express or implied. See the License for the +@REM specific language governing permissions and limitations +@REM under the License. +@REM ---------------------------------------------------------------------------- + +@REM ---------------------------------------------------------------------------- +@REM Maven2 Start Up Batch script +@REM +@REM Required ENV vars: +@REM JAVA_HOME - location of a JDK home dir +@REM +@REM Optional ENV vars +@REM M2_HOME - location of maven2's installed home dir +@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands +@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a key stroke before ending +@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven +@REM e.g. to debug Maven itself, use +@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000 +@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files +@REM ---------------------------------------------------------------------------- + +@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on' +@echo off +@REM set title of command window +title %0 +@REM enable echoing my setting MAVEN_BATCH_ECHO to 'on' +@if "%MAVEN_BATCH_ECHO%" == "on" echo %MAVEN_BATCH_ECHO% + +@REM set %HOME% to equivalent of $HOME +if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%") + +@REM Execute a user defined script before this one +if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre +@REM check for pre script, once with legacy .bat ending and once with .cmd ending +if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat" +if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd" +:skipRcPre + +@setlocal + +set ERROR_CODE=0 + +@REM To isolate internal variables from possible post scripts, we use another setlocal +@setlocal + +@REM ==== START VALIDATION ==== +if not "%JAVA_HOME%" == "" goto OkJHome + +echo. +echo Error: JAVA_HOME not found in your environment. >&2 +echo Please set the JAVA_HOME variable in your environment to match the >&2 +echo location of your Java installation. >&2 +echo. +goto error + +:OkJHome +if exist "%JAVA_HOME%\bin\java.exe" goto init + +echo. +echo Error: JAVA_HOME is set to an invalid directory. >&2 +echo JAVA_HOME = "%JAVA_HOME%" >&2 +echo Please set the JAVA_HOME variable in your environment to match the >&2 +echo location of your Java installation. >&2 +echo. +goto error + +@REM ==== END VALIDATION ==== + +:init + +@REM Find the project base dir, i.e. the directory that contains the folder ".mvn". +@REM Fallback to current working directory if not found. + +set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR% +IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir + +set EXEC_DIR=%CD% +set WDIR=%EXEC_DIR% +:findBaseDir +IF EXIST "%WDIR%"\.mvn goto baseDirFound +cd .. +IF "%WDIR%"=="%CD%" goto baseDirNotFound +set WDIR=%CD% +goto findBaseDir + +:baseDirFound +set MAVEN_PROJECTBASEDIR=%WDIR% +cd "%EXEC_DIR%" +goto endDetectBaseDir + +:baseDirNotFound +set MAVEN_PROJECTBASEDIR=%EXEC_DIR% +cd "%EXEC_DIR%" + +:endDetectBaseDir + +IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig + +@setlocal EnableExtensions EnableDelayedExpansion +for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a +@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS% + +:endReadAdditionalConfig + +SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe" +set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar" +set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain + +set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.2/maven-wrapper-0.4.2.jar" +FOR /F "tokens=1,2 delims==" %%A IN (%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties) DO ( + IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B +) + +@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central +@REM This allows using the maven wrapper in projects that prohibit checking in binary data. +if exist %WRAPPER_JAR% ( + echo Found %WRAPPER_JAR% +) else ( + echo Couldn't find %WRAPPER_JAR%, downloading it ... + echo Downloading from: %DOWNLOAD_URL% + powershell -Command "(New-Object Net.WebClient).DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')" + echo Finished downloading %WRAPPER_JAR% +) +@REM End of extension + +%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %* +if ERRORLEVEL 1 goto error +goto end + +:error +set ERROR_CODE=1 + +:end +@endlocal & set ERROR_CODE=%ERROR_CODE% + +if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost +@REM check for post script, once with legacy .bat ending and once with .cmd ending +if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat" +if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd" +:skipRcPost + +@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on' +if "%MAVEN_BATCH_PAUSE%" == "on" pause + +if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE% + +exit /B %ERROR_CODE% diff --git a/chapter-07/pom.xml b/chapter-07/pom.xml new file mode 100644 index 0000000..fdacff6 --- /dev/null +++ b/chapter-07/pom.xml @@ -0,0 +1,78 @@ + + + 4.0.0 + + com.packt.distributed-tracing-chapter-07 + parent + 0.0.1-SNAPSHOT + pom + + Tracing with Service Mesh + Chapter 7 - Tracing with Service Mesh + + + exercise1 + + + + org.springframework.boot + spring-boot-starter-parent + 2.0.4.RELEASE + + + + + + UTF-8 + UTF-8 + 1.8 + + + + + + org.springframework.boot + spring-boot-starter-web + 2.0.4.RELEASE + + + io.opentracing + opentracing-api + 0.31.0 + + + io.opentracing.contrib + opentracing-spring-cloud-starter + 0.1.13 + + + io.opentracing.contrib + opentracing-spring-tracer-configuration-starter + 0.1.0 + + + io.jaegertracing + jaeger-client + 0.31.0 + + + io.jaegertracing + jaeger-zipkin + 0.31.0 + + + + + + + + + org.springframework.boot + spring-boot-maven-plugin + + + + + + diff --git a/chapter-07/routing.yml b/chapter-07/routing.yml new file mode 100644 index 0000000..53b5238 --- /dev/null +++ b/chapter-07/routing.yml @@ -0,0 +1,34 @@ +apiVersion: networking.istio.io/v1alpha3 +kind: VirtualService +metadata: + name: formatter-virtual-svc +spec: + hosts: + - formatter-svc + http: + - match: + - headers: + baggage-user-agent: + regex: .*Netscape.* + route: + - destination: + host: formatter-svc + subset: v2 + - route: + - destination: + host: formatter-svc + subset: v1 +--- +apiVersion: networking.istio.io/v1alpha3 +kind: DestinationRule +metadata: + name: formatter-svc-destination +spec: + host: formatter-svc + subsets: + - name: v1 + labels: + version: v1 + - name: v2 + labels: + version: v2