Merge pull request #400 from micro/interval

Move RegisterInterval into the server

server/options.go

@@ -27,6 +27,8 @@ type Options struct {
 
 	// The register expiry time
 	RegisterTTL time.Duration
+	// The interval on which to register
+	RegisterInterval time.Duration
 
 	// The router for requests
 	Router Router
@@ -168,6 +170,13 @@ func RegisterTTL(t time.Duration) Option {
 	}
 }
 
+// Register the service with at interval
+func RegisterInterval(t time.Duration) Option {
+	return func(o *Options) {
+		o.RegisterInterval = t
+	}
+}
+
 // WithRouter sets the request router
 func WithRouter(r Router) Option {
 	return func(o *Options) {

server/rpc_server.go

@@ -439,6 +439,7 @@ func (s *rpcServer) Start() error {
 	registerDebugHandler(s)
 	config := s.Options()
 
+	// start listening on the transport
 	ts, err := config.Transport.Listen(config.Address)
 	if err != nil {
 		return err
@@ -446,30 +447,45 @@ func (s *rpcServer) Start() error {
 
 	log.Logf("Transport [%s] Listening on %s", config.Transport.String(), ts.Addr())
 
-	s.Lock()
 	// swap address
+	s.Lock()
 	addr := s.opts.Address
 	s.opts.Address = ts.Addr()
 	s.Unlock()
 
-	exit := make(chan bool, 1)
+	// connect to the broker
+	if err := config.Broker.Connect(); err != nil {
+		return err
+	}
+
+	log.Logf("Broker [%s] Listening on %s", config.Broker.String(), config.Broker.Address())
+
+	// announce self to the world
+	if err := s.Register(); err != nil {
+		log.Log("Server register error: ", err)
+	}
+
+	exit := make(chan bool)
 
 	go func() {
 		for {
+			// listen for connections
 			err := ts.Accept(s.ServeConn)
 
-			// check if we're supposed to exit
+			// TODO: listen for messages
+			// msg := broker.Exchange(service).Consume()
+
 			select {
+			// check if we're supposed to exit
 			case <-exit:
 				return
-			default:
-			}
-
 			// check the error and backoff
-			if err != nil {
-				log.Logf("Accept error: %v", err)
-				time.Sleep(time.Second)
-				continue
+			default:
+				if err != nil {
+					log.Logf("Accept error: %v", err)
+					time.Sleep(time.Second)
+					continue
+				}
 			}
 
 			// no error just exit
@@ -478,9 +494,38 @@ func (s *rpcServer) Start() error {
 	}()
 
 	go func() {
-		// wait for exit
-		ch := <-s.exit
-		exit <- true
+
+		// new ticker
+		t := time.NewTicker(s.opts.RegisterInterval)
+
+		// only process if it exists
+		if s.opts.RegisterInterval <= time.Duration(0) {
+			t.C = nil
+		}
+
+		// return error chan
+		var ch chan error
+
+	Loop:
+		for {
+			select {
+			// register self on interval
+			case <-t.C:
+				if err := s.Register(); err != nil {
+					log.Log("Server register error: ", err)
+				}
+			// wait for exit
+			case ch = <-s.exit:
+				t.Stop()
+				close(exit)
+				break Loop
+			}
+		}
+
+		// deregister self
+		if err := s.Deregister(); err != nil {
+			log.Log("Server deregister error: ", err)
+		}
 
 		// wait for requests to finish
 		if wait(s.opts.Context) {
@@ -493,18 +538,12 @@ func (s *rpcServer) Start() error {
 		// disconnect the broker
 		config.Broker.Disconnect()
 
-		s.Lock()
 		// swap back address
+		s.Lock()
 		s.opts.Address = addr
 		s.Unlock()
 	}()
 
-	// TODO: subscribe to cruft
-	if err := config.Broker.Connect(); err != nil {
-		return err
-	}
-
-	log.Logf("Broker [%s] Listening on %s", config.Broker.String(), config.Broker.Address())
 	return nil
 }
 

server/server.go

@@ -21,8 +21,6 @@ type Server interface {
 	NewHandler(interface{}, ...HandlerOption) Handler
 	NewSubscriber(string, interface{}, ...SubscriberOption) Subscriber
 	Subscribe(Subscriber) error
-	Register() error
-	Deregister() error
 	Start() error
 	Stop() error
 	String() string
@@ -173,16 +171,6 @@ func Subscribe(s Subscriber) error {
 	return DefaultServer.Subscribe(s)
 }
 
-// Register registers the default server with the discovery system
-func Register() error {
-	return DefaultServer.Register()
-}
-
-// Deregister deregisters the default server from the discovery system
-func Deregister() error {
-	return DefaultServer.Deregister()
-}
-
 // Run starts the default server and waits for a kill
 // signal before exiting. Also registers/deregisters the server
 func Run() error {
@@ -190,18 +178,10 @@ func Run() error {
 		return err
 	}
 
-	if err := DefaultServer.Register(); err != nil {
-		return err
-	}
-
 	ch := make(chan os.Signal, 1)
 	signal.Notify(ch, syscall.SIGTERM, syscall.SIGINT, syscall.SIGKILL)
 	log.Logf("Received signal %s", <-ch)
 
-	if err := DefaultServer.Deregister(); err != nil {
-		return err
-	}
-
 	return Stop()
 }