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server.go
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server.go
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package main
import (
"fmt"
"io/ioutil"
"net/http/pprof"
"net/url"
"github.com/go-chi/chi/v5"
"github.com/go-chi/chi/v5/middleware"
"github.com/go-chi/render"
"github.com/robfig/cron/v3"
"github.com/sirupsen/logrus"
"github.com/whitewater-guide/gorge/core"
"github.com/whitewater-guide/gorge/schedule"
"github.com/whitewater-guide/gorge/storage"
)
type server struct {
port string
endpoint string
cache storage.CacheManager
database storage.DatabaseManager
logger *logrus.Logger
registry *core.ScriptRegistry
router *chi.Mux
scheduler core.JobScheduler
debug bool
}
func (s *server) routes() {
s.router = chi.NewRouter()
s.router.Use(
render.SetContentType(render.ContentTypeJSON),
middleware.RequestID,
middleware.RedirectSlashes,
middleware.Compress(5),
middleware.NoCache,
middleware.Recoverer,
middleware.Heartbeat("/healthcheck"),
)
s.router.Route(s.endpoint, func(r chi.Router) {
r.Get("/version", s.handleVersion())
r.Get("/scripts", s.handleListScripts())
r.Post("/upstream/{script}/gauges", s.handleUpstreamGauges())
r.Post("/upstream/{script}/measurements", s.handleUpstreamMeasurements())
r.Get("/jobs", s.handleListJobs())
r.Get("/jobs/{jobId}", s.handleGetJob())
r.Get("/jobs/{jobId}/gauges", s.handleGetJobGauges())
r.Post("/jobs", s.handleAddJob())
r.Delete("/jobs/{jobId}", s.handleDeleteJob())
r.Get("/measurements/{script}", s.handleGetMeasurements())
r.Get("/measurements/{script}/{code}", s.handleGetMeasurements())
r.Get("/measurements/{script}/{code}/latest", s.handleGetLatest())
r.Get("/measurements/{script}/{code}/nearest", s.handleGetNearest())
r.Get("/measurements/latest", s.handleGetLatest())
})
if s.debug {
s.router.HandleFunc("/debug/pprof", pprof.Index)
s.router.HandleFunc("/debug/cmdline", pprof.Cmdline)
s.router.HandleFunc("/debug/profile", pprof.Profile)
s.router.HandleFunc("/debug/symbol", pprof.Symbol)
s.router.HandleFunc("/debug/trace", pprof.Trace)
s.router.Handle("/debug/heap", pprof.Handler("heap"))
s.router.Handle("/debug/goroutine", pprof.Handler("goroutine"))
}
}
func (s *server) start() {
s.scheduler.Start()
// Load initial jobs
jobs, err := s.database.ListJobs()
if err != nil {
s.logger.Fatalf("failed to load initial jobs: %v", err)
}
for _, job := range jobs {
err := s.scheduler.AddJob(job)
if err != nil {
s.logger.Fatalf("failed to schedule initial jobs: %v", err)
}
s.logger.WithFields(logrus.Fields{"script": job.Script, "jobID": job.ID}).Info("started job")
}
s.logger.Info("server started")
}
func (s *server) shutdown() {
s.database.Close()
s.cache.Close()
s.scheduler.Stop()
}
func newServer(cfg *config, registry *core.ScriptRegistry) *server {
result := &server{registry: registry, debug: cfg.Debug}
result.logger = logrus.New()
if cfg.Log.Format == "json" {
result.logger.SetFormatter(&logrus.JSONFormatter{})
} else {
result.logger.SetFormatter(&logrus.TextFormatter{ForceColors: true, FullTimestamp: true})
}
logLevel := cfg.Log.Level
if cfg.Debug {
logLevel = "debug"
}
if logLevel == "" {
result.logger.SetOutput(ioutil.Discard)
} else {
lvl, err := logrus.ParseLevel(logLevel)
if err != nil {
lvl = logrus.DebugLevel
}
result.logger.SetLevel(lvl)
}
result.logger.WithFields(logrus.Fields{
"cache": cfg.Cache,
"db": cfg.Db,
}).Info("starting storage...")
switch cfg.Cache {
case "redis":
cache, err := storage.NewRedisCacheManager(cfg.Redis.Host, cfg.Redis.Port)
if err != nil {
result.logger.Fatal(err)
}
result.cache = cache
case "inmemory":
cache, err := storage.NewEmbeddedCacheManager()
if err != nil {
result.logger.Fatal(err)
}
result.cache = cache
default:
result.logger.Fatal("invalid cache manager")
}
switch cfg.Db {
case "postgres":
pgConnStr := fmt.Sprintf(
"postgres://%s:%s@%s/%s?sslmode=disable",
cfg.Pg.User,
url.QueryEscape(cfg.Pg.Password),
cfg.Pg.Host,
cfg.Pg.Db,
)
db, err := storage.NewPostgresManager(pgConnStr, cfg.DbChunkSize, cfg.Pg.WithoutTimescale)
if err != nil {
result.logger.Fatal(err)
}
result.database = db
case "inmemory":
db, err := storage.NewSqliteDb(cfg.DbChunkSize)
if err != nil {
result.logger.Fatal(err)
}
result.database = db
default:
result.logger.Fatal("invalid database manager")
}
result.logger.Info("storage started")
result.port = cfg.Port
result.endpoint = cfg.Endpoint
result.scheduler = &schedule.SimpleScheduler{
Database: result.database,
Cache: result.cache,
Logger: result.logger,
Registry: result.registry,
Cron: cron.New(),
}
core.Client = core.NewClient(cfg.HTTP, result.logger.WithField("client", "http"))
return result
}