/
main.go
115 lines (91 loc) · 2.74 KB
/
main.go
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package main
import (
"net/http"
"time"
"github.com/Sirupsen/logrus"
"github.com/boltdb/bolt"
"github.com/carbocation/interpose"
"github.com/gorilla/mux"
"github.com/mateuszdyminski/logag/handlers"
"github.com/mateuszdyminski/logag/libcfg"
"github.com/mateuszdyminski/logag/liblog"
"github.com/mateuszdyminski/logag/middlewares"
"github.com/mateuszdyminski/logag/services"
"github.com/mateuszdyminski/logag/ws"
"github.com/tylerb/graceful"
"gopkg.in/olivere/elastic.v3"
)
// Application is the application object that runs HTTP server.
type Application struct {
logSrv *services.LogService
}
// TODO: use different middleware library ?
func (app *Application) middlewares(cfg *libcfg.Cfg) (*interpose.Middleware, error) {
middle := interpose.New()
middle.Use(middlewares.Log())
middle.UseHandler(app.mux(cfg))
return middle, nil
}
func (app *Application) mux(cfg *libcfg.Cfg) *mux.Router {
router := mux.NewRouter()
// initialize handlers per group of endpoints
handlers.ConfigureLogRest(router, app.logSrv)
// Path of static files must be last!
router.PathPrefix("/").Handler(http.FileServer(http.Dir(cfg.StaticsPath)))
return router
}
func NewApp(cfg *libcfg.Cfg, db *bolt.DB) (*Application, error) {
// Create a elastic client
client, err := elastic.NewClient(elastic.SetURL(cfg.Elastics...))
if err != nil {
return nil, err
}
// create websocket server
ws := ws.NewHub()
// start ws in separate goroutine
go ws.Run()
// create all services
logSrv := services.NewLogService(cfg, client, ws, db)
// create indexes in ES
if err := logSrv.CreateIndex(); err != nil {
return nil, err
}
return &Application{logSrv: logSrv}, nil
}
func main() {
cfg, err := libcfg.LoadCfg()
if err != nil {
logrus.Fatalf("Can't laod configuration! Err: %v", err)
}
logCfg, err := liblog.NewLogger("/tmp", "info")
if err != nil {
logrus.Fatalf("Can't create logger! Err: %v", err.Error())
}
defer logCfg.Close()
db, err := bolt.Open(cfg.BoltDDPath, 0600, nil)
if err != nil {
logrus.Fatal("Can't open boltDB! Err: %v", err.Error())
}
defer db.Close()
app, err := NewApp(cfg, db)
if err != nil {
logrus.Fatalf("Can't create application! Err: %v", err.Error())
}
middle, err := app.middlewares(cfg)
if err != nil {
logrus.Fatalf("Can't create http middlewares! Err: %v", err.Error())
}
drainInterval, err := time.ParseDuration(cfg.HttpDrainInterval)
if err != nil {
logrus.Fatalf("Can't parse drain interval! Err: %v", err.Error())
}
// TODO: check facebook-go as graceful server
srv := &graceful.Server{
Timeout: drainInterval,
Server: &http.Server{Addr: cfg.Host, Handler: middle},
}
logrus.Infoln("Running HTTP server on " + cfg.Host)
if err := srv.ListenAndServe(); err != nil {
logrus.Fatal(err.Error())
}
}