src/cif/initialise.go

@@ -8,15 +8,20 @@ import (
 
 // Start a background task to periodically check and update the timetable from the CIF file feed.
 
-func InitBackgroundTask(cfg *helpers.Configuration) {
-	go runBackgroundTask(cfg)
+func InitBackgroundTask(cfg *helpers.Configuration, stop <-chan struct{}) {
+	go runBackgroundTask(cfg, stop)
 }
 
-func runBackgroundTask(cfg *helpers.Configuration) {
+func runBackgroundTask(cfg *helpers.Configuration, stop <-chan struct{}) {
 	ticker := time.NewTicker(10 * time.Second)
 	defer ticker.Stop()
 
-	for range ticker.C {
+	for {
+		select {
+		case <-stop:
+			return
+		case <-ticker.C:
 			cifCheck(cfg)
 		}
 	}
+}

src/main.go

@@ -5,6 +5,7 @@ import (
 	"os"
 	"os/signal"
 	"syscall"
+	"time"
 
 	"git.fjla.uk/owlboard/timetable-mgr/cif"
 	"git.fjla.uk/owlboard/timetable-mgr/dbAccess"
@@ -28,35 +29,38 @@ func main() {
 	dbAccess.InitDataAccess(cfg)
 	dbAccess.PushVersionToDb()
 
-	// Handle signals from the OS
-	go handleSignals(cfg)
+	// Initialise a `stop` channel to signal goroutines to cleanup
+	stop := make(chan struct{})
 
-	defer cleanup(cfg)
+	// Handle signals from the OS
+	go handleSignals(cfg, stop)
+
+	// Defer cleanup task
+	//defer cleanup(cfg, stop)
 
 	// Start CIF Task Ticker
-	cif.InitBackgroundTask(cfg)
+	cif.InitBackgroundTask(cfg, stop)
 
 	if cfg.VstpOn {
 		messaging.StompInit(cfg)
 		vstp.Subscribe()
 	}
 
-	select {}
+	<-stop
 }
 
 // Traps SIGINT and SIGTERM signals and ensures cleanup() is run
-func handleSignals(cfg *helpers.Configuration) {
+func handleSignals(cfg *helpers.Configuration, stop chan<- struct{}) {
 	sigChan := make(chan os.Signal, 1)
 	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
 
 	sig := <-sigChan
 	log.Msg.Warn("Signal received: " + sig.String())
-	cleanup(cfg)
-	os.Exit(1)
+	cleanup(cfg, stop)
 }
 
 // Cleans up open connections ready for a clean exit of the program
-func cleanup(cfg *helpers.Configuration) {
+func cleanup(cfg *helpers.Configuration, stop chan<- struct{}) {
 	log.Msg.Debug("Cleaning up open connections")
 	if cfg.VstpOn {
 		if messaging.Client != nil {
@@ -68,8 +72,15 @@ func cleanup(cfg *helpers.Configuration) {
 		log.Msg.Info("Closing MongoDB Client")
 		dbAccess.CloseMongoClient()
 	}
+	log.Msg.Info("Signalling to other goroutines")
+	close(stop)
+
 	log.Msg.Info("Program ready to exit")
 	if log.Msg != nil {
 		log.Msg.Sync()
 	}
+
+	time.Sleep(500 * time.Millisecond)
+
+	os.Exit(0)
 }