Exemple #1
0
func handleClient(conn net.Conn, c chan *email.SMTPEmail) {
	client := client.MakeClient(conn)
	defer client.Close()

	// close on shutdown using strategy from http://stackoverflow.com/a/13419724
	quit := false
	id, shutdownRequested := shutdown.AddShutdownListener("Client processor")
	defer shutdown.RoutineDone(id)

	go func() {
		<-shutdownRequested
		quit = true
		client.Close()
	}()

	err := client.BeginReceive(c)
	if err != nil {
		if quit {
			log.Info("Shutting down client")
			return
		}
		log.WithFields(log.Fields{
			"error": err.Error(),
		}).Info("error encountered, closing client connection")
	}
}
Exemple #2
0
// Listens for connections on the given listener and puts them in the channel.
// Blocks while still receiving connections.
// Returns an error on network problem, or nil if shutdown requested
func listenForConnections(l net.Listener, c chan net.Conn) error {
	id, shutdownRequested := shutdown.AddShutdownListener("Connection listener")
	defer shutdown.RoutineDone(id)

	log.WithFields(log.Fields{
		"listening_on": fmt.Sprintf("%v", l.Addr()),
		"fqdn":         config.GetFQDN(),
	}).Info("Starting connection listener")

	// shutdown using the strategy found here http://stackoverflow.com/a/13419724
	quit := false
	go func() {
		<-shutdownRequested
		quit = true
		l.Close()
	}()

	for {
		conn, err := l.Accept()
		if err != nil {
			if quit {
				log.Info("Shutting down connection listener")
				return nil
			}
			l.Close()
			return err
		}
		c <- conn
	}
}
Exemple #3
0
func handleClients(cxnChan chan net.Conn, emChan chan *email.SMTPEmail) {
	id, shutdownRequested := shutdown.AddShutdownListener("Client handler")
	defer shutdown.RoutineDone(id)

	for {
		select {
		case cxn := <-cxnChan:
			go handleClient(cxn, emChan)
		case <-shutdownRequested:
			log.Info("Shutting down client handler")
			return
		}
	}
}
Exemple #4
0
func (b *MemoryBackend) continuousCleanup() {
	id, shutdownRequested := shutdown.AddShutdownListener("MemoryBackend cleanup")
	defer shutdown.RoutineDone(id)

	for {
		select {
		case <-time.After(config.GetEmailTTL() / 4):
			b.doCleanup()
		case <-shutdownRequested:
			log.Info("Shutting down memory cleanup with system")
			return
		case <-b.quit:
			log.Info("Quitting memory cleanup")
			return
		}
	}
}