initial commit 2

main.go

@@ -0,0 +1,66 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/signal"
+	"time"
+
+	"io"
+
+	"bitbucket.org/nemt/nemt-portal-api/data"
+	"bitbucket.org/nemt/nemt-portal-api/domain/service"
+	"bitbucket.org/nemt/nemt-portal-api/infra/cache"
+	"bitbucket.org/nemt/nemt-portal-api/infra/config"
+	"bitbucket.org/nemt/nemt-portal-api/infra/logger"
+	"bitbucket.org/nemt/nemt-portal-api/server"
+)
+
+func main() {
+	var err error
+
+	cfg, err := config.Read()
+	endAsErr(err, "Could not read configuration file.", os.Stdout, os.Stderr)
+
+	log, err := logger.New(cfg)
+	endAsErr(err, "Could not create logging structure.", os.Stdout, os.Stderr)
+
+	log.Printf("Connecting to the database at %s:%d.\n", cfg.DB.Host, cfg.DB.Port)
+	db, err := data.Connect(cfg)
+	endAsErr(err, "Could not connect to database.", log.InfoWriter(), log.ErrorWriter())
+	atInterruption(func() {
+		log.Printf("Closing DB Connection.")
+		db.Close()
+	})
+
+	log.Printf("Connecting to the cache server at %s:%d.\n", cfg.Cache.Server, cfg.Cache.Port)
+	cache := cache.Instance(cfg)
+
+	svc, err := service.New(db, cache, cfg, log)
+	endAsErr(err, "Could not create service structure.", log.InfoWriter(), log.ErrorWriter())
+
+	// Runs server.
+	log.Info("Runninng server at localhost:", cfg.HTTP.Port)
+	err = server.Instance(svc, cfg, log, cache).Run()
+	endAsErr(err, "Could not start the server.", log.InfoWriter(), log.ErrorWriter())
+}
+
+func atInterruption(fn func()) {
+	go func() {
+		sc := make(chan os.Signal, 1)
+		signal.Notify(sc, os.Interrupt)
+		<-sc
+
+		fn()
+		os.Exit(0)
+	}()
+}
+
+func endAsErr(err error, message string, infow io.Writer, errorw io.Writer) {
+	if err != nil {
+		fmt.Fprintln(errorw, "Error:", err)
+		fmt.Fprintln(infow, message)
+		time.Sleep(time.Millisecond * 50) // needed for printing all messages before exiting
+		os.Exit(1)
+	}
+}