/
executor.go
233 lines (206 loc) · 5.21 KB
/
executor.go
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package main
import (
"context"
"database/sql"
"fmt"
_ "github.com/go-sql-driver/mysql"
"strings"
"text/template"
"time"
)
const (
sqlTimeout = 5 * time.Second
)
type Executor struct {
script *ExperimentScript
values *ExperimentValues
replacements *Replacements
db *sql.DB
dryRun bool
continueOnError bool
}
func NewExecutor(script *ExperimentScript, values *ExperimentValues, dryRun, continueOnError bool) (*Executor, error) {
env, err := getEnvValues(script, values)
if err != nil {
return nil, err
}
params, err := getParamValues(script, values)
if err != nil {
return nil, err
}
replacements := &Replacements{
Name: script.Name,
Env: env,
Params: params,
}
dbDriver := replacements.Env["dbDriver"]
switch dbDriver {
case "mysql", "pgx":
case "":
return nil, fmt.Errorf("required env not found: %s", "dbDriver")
default:
return nil, fmt.Errorf("invalid env value dbDriver='%s'. Allowed values are 'mysql', 'pgx'", dbDriver)
}
// Validate URL
dbUrl := replacements.Env["dbUrl"]
if dbUrl == "" {
return nil, fmt.Errorf("required env not found: %s", "dbUrl")
}
// Open new connection
db, err := sql.Open(dbDriver, dbUrl)
if err != nil {
return nil, err
}
return &Executor{
script: script,
values: values,
replacements: replacements,
db: db,
dryRun: dryRun,
continueOnError: continueOnError,
}, nil
}
func (e *Executor) Execute() error {
errors := 0
fmt.Printf("Running benchmark: %s\n", e.script.Name)
fmt.Printf("Dry run: %v\n", e.dryRun)
fmt.Printf("Continue on error: %v\n", e.continueOnError)
fmt.Printf("General information:\n")
fmt.Printf("\tVersion: %s\n", e.script.Info.Version)
fmt.Printf("\tQuestion: %s\n", e.script.Info.Question)
fmt.Printf("\tDescription: %s\n", e.script.Info.Description)
fmt.Printf("\nEnvironment:\n")
for k, v := range e.replacements.Env {
fmt.Printf("\t%s: %s\n", k, v)
}
fmt.Printf("\nParams:\n")
for k, v := range e.replacements.Params {
fmt.Printf("\t%s: %s\n", k, v)
}
fmt.Printf("\nStarting Setup Phase:\n")
fmt.Printf("Executing SQL commands:\n")
for _, cmd := range e.script.Setup.SQL {
err := e.executeSQLCmd(cmd)
if err != nil {
return err
}
}
fmt.Printf("Executing Diligent commands:\n")
for _, cmd := range e.script.Setup.Diligent {
err := e.executeDiligentCmd(cmd)
if err != nil {
return err
}
}
fmt.Printf("Setup Phase Completed.\n")
fmt.Printf("\nStarting Execution Phase:\n")
fmt.Printf("Executing Diligent commands:\n")
for _, cmd := range e.script.Experiment {
err := e.executeDiligentCmd(cmd)
if err != nil {
if e.continueOnError {
fmt.Printf("WARNING: Continuing despite errors\n")
errors++
} else {
return err
}
}
}
fmt.Printf("Execution Phase Completed.\n")
fmt.Printf("\nStarting Conclusion Phase:\n")
fmt.Printf("Executing Diligent commands:\n")
for _, cmd := range e.script.Conclusion {
err := e.executeDiligentCmd(cmd)
if err != nil {
if e.continueOnError {
fmt.Printf("WARNING: Continuing despite errors\n")
errors++
} else {
return err
}
}
}
fmt.Printf("Conclusion Phase Completed.\n")
if e.continueOnError && errors > 0 {
fmt.Printf("WARNING: %d commands encountered errors during execution\n", errors)
}
return nil
}
func getEnvValues(script *ExperimentScript, values *ExperimentValues) (map[string]string, error) {
env := make(map[string]string)
notFound := make([]string, 0)
for _, key := range script.Env {
value, ok := values.Env[key]
if !ok {
notFound = append(notFound, key)
} else {
env[key] = value
}
}
if len(notFound) > 0 {
return nil, fmt.Errorf("required env parameters not found in values: %s", notFound)
}
return env, nil
}
func getParamValues(script *ExperimentScript, values *ExperimentValues) (map[string]string, error) {
params := make(map[string]string)
unknowns := make([]string, 0)
// Make a copy of input parameters
for key, val := range script.Params {
params[key] = val
}
// Go over the provided overrides
for key, val := range values.Overrides {
// Must be a valid override
_, ok := params[key]
if !ok {
unknowns = append(unknowns, key)
} else {
params[key] = val
}
}
if len(unknowns) > 0 {
return nil, fmt.Errorf("unknown override parameters found in input: %s", unknowns)
}
return params, nil
}
func (e *Executor) executeSQLCmd(cmdTmplStr string) error {
tmpl, err := template.New("t1").Parse(cmdTmplStr)
if err != nil {
return err
}
var sb strings.Builder
err = tmpl.Execute(&sb, e.replacements)
if err != nil {
return err
}
cmd := sb.String()
fmt.Println(">>", "sql", cmd)
if !e.dryRun {
sqlCtx, sqlCancel := context.WithTimeout(context.Background(), sqlTimeout)
_, err = e.db.ExecContext(sqlCtx, cmd)
sqlCancel()
if err != nil {
return err
}
}
return nil
}
func (e *Executor) executeDiligentCmd(cmdTmplStr string) error {
tmpl, err := template.New("t1").Parse(cmdTmplStr)
if err != nil {
return err
}
var sb strings.Builder
err = tmpl.Execute(&sb, e.replacements)
if err != nil {
return err
}
cmdStr := sb.String()
fmt.Println(">>", cmdStr)
if !e.dryRun {
tokens := strings.Split(cmdStr, " ")
return grumbleApp.RunCommand(tokens)
}
return nil
}