Correct handling of state and console events

server/environment_docker.go

@@ -120,7 +120,7 @@ func (d *DockerEnvironment) Start() error {
 
 	// No reason to try starting a container that is already running.
 	if c.State.Running {
-		d.Server.Emit(StatusEvent, ProcessRunningState)
+		d.Server.SetState(ProcessRunningState)
 		if !d.attached {
 			return d.Attach()
 		}
@@ -134,18 +134,18 @@ func (d *DockerEnvironment) Start() error {
 		return err
 	}
 
-	d.Server.Emit(StatusEvent, ProcessStartingState)
+	d.Server.SetState(ProcessStartingState)
 
 	// Reset the permissions on files for the server before actually trying
 	// to start it.
 	if err := d.Server.Filesystem.Chown("/"); err != nil {
-		d.Server.Emit(StatusEvent, ProcessOfflineState)
+		d.Server.SetState(ProcessOfflineState)
 		return err
 	}
 
 	opts := types.ContainerStartOptions{}
 	if err := d.Client.ContainerStart(context.Background(), d.Server.Uuid, opts); err != nil {
-		d.Server.Emit(StatusEvent, ProcessOfflineState)
+		d.Server.SetState(ProcessOfflineState)
 		return err
 	}
 
@@ -158,7 +158,7 @@ func (d *DockerEnvironment) Start() error {
 func (d *DockerEnvironment) Stop() error {
 	t := time.Second * 10
 
-	d.Server.Emit(StatusEvent, ProcessStoppingState)
+	d.Server.SetState(ProcessStoppingState)
 	return d.Client.ContainerStop(context.Background(), d.Server.Uuid, &t)
 }
 
@@ -175,7 +175,7 @@ func (d *DockerEnvironment) Terminate(signal os.Signal) error {
 		return nil
 	}
 
-	d.Server.Emit(StatusEvent, ProcessStoppingState)
+	d.Server.SetState(ProcessStoppingState)
 	return d.Client.ContainerKill(ctx, d.Server.Uuid, "SIGKILL")
 }
 
@@ -211,7 +211,7 @@ func (d *DockerEnvironment) Attach() error {
 	go func() {
 		defer d.stream.Close()
 		defer func() {
-			d.Server.Emit(StatusEvent, ProcessOfflineState)
+			d.Server.SetState(ProcessOfflineState)
 			d.attached = false
 		}()
 

server/events.go

@@ -6,7 +6,7 @@ type EventListenerFunction *func(string)
 
 // Defines all of the possible output events for a server.
 const (
-	ConsoleOutputEvent = "console"
+	ConsoleOutputEvent = "console output"
 	StatusEvent = "status"
 )
 

server/server.go

@@ -201,7 +201,7 @@ func FromConfiguration(data []byte, cfg *config.SystemConfiguration) (*Server, e
 	s.Cache = cache.New(time.Minute*10, time.Minute*15)
 	s.Filesystem = &Filesystem{
 		Configuration: cfg,
-		Server: s,
+		Server:        s,
 	}
 
 	return s, nil
@@ -236,23 +236,18 @@ const (
 // Sets the state of the server internally. This function handles crash detection as
 // well as reporting to event listeners for the server.
 func (s *Server) SetState(state string) error {
-	switch state {
-	case ProcessOfflineState:
-	case ProcessStartingState:
-	case ProcessRunningState:
-	case ProcessStoppingState:
-		s.State = state
-		break
-	default:
+	if state != ProcessOfflineState && state != ProcessStartingState && state != ProcessRunningState && state != ProcessStoppingState {
 		return errors.New(fmt.Sprintf("invalid server state received: %s", state))
 	}
 
+	s.State = state
+
 	// Emit the event to any listeners that are currently registered.
-	s.Emit(StatusEvent, state)
+	s.Emit(StatusEvent, s.State)
 
 	// @todo handle a crash event here. Need to port the logic from the Nodejs daemon
 	// into this daemon. I believe its basically just if state != stopping && newState = stopped
 	// then crashed.
 
 	return nil
-}
+}