Initial commit.

cmd/metricatord/main.go

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"go.dev.pztrn.name/metricator/internal/common"
+	"go.dev.pztrn.name/metricator/internal/configuration"
+	"go.dev.pztrn.name/metricator/internal/datastore"
+	"go.dev.pztrn.name/metricator/internal/httpserver"
+)
+
+func main() {
+	log.Printf("Starting Metricator daemon, version %s from branch %s (build #%s, commit hash %s)\n",
+		common.Version,
+		common.Branch,
+		common.Build,
+		common.CommitHash,
+	)
+
+	mainCtx, cancelFunc := context.WithCancel(context.Background())
+	config := configuration.NewConfig()
+
+	httpSrv, httpStopped := httpserver.NewHTTPServer(mainCtx, config)
+	dataStore, dataStoreStopped := datastore.NewDataStore(mainCtx, config)
+
+	flag.Parse()
+	err := config.Parse()
+	if err != nil {
+		log.Fatalln("Failed to parse configuration:", err.Error())
+	}
+	log.Printf("Configuration parsed: %+v\n", config)
+
+	dataStore.Start()
+	httpSrv.Start()
+
+	log.Println("Metricator is started and ready to serve requests")
+
+	// CTRL+C handler.
+	signalHandler := make(chan os.Signal, 1)
+	shutdownDone := make(chan bool, 1)
+
+	signal.Notify(signalHandler, os.Interrupt, syscall.SIGTERM)
+
+	go func() {
+		<-signalHandler
+		cancelFunc()
+
+		<-dataStoreStopped
+		<-httpStopped
+
+		shutdownDone <- true
+	}()
+
+	<-shutdownDone
+	log.Println("Metricator stopped")
+	os.Exit(0)
+}