public CommandDispatcher(UserContext context)
{
context.SetOnDisconnect(OnDisconnect);
context.SetOnReceive(OnReceive);
context.SetOnConnected(OnConnected);
this.Context = context;
}
private void OnReceiveCore(UserContext context, DataFrame frame)
{
var memoryStream = new MemoryStream();
memoryStream.Write(frame.Payload, 0, frame.Payload.Length);
memoryStream.Position = 0;
var obj = JsonSerializer.Parse<JukeboxMessage>(memoryStream);
JukeboxMessage dispatcherObject = (JukeboxMessage)obj;
if (dispatcherObject.Type == "response")
HandleResponse(dispatcherObject);
else if (dispatcherObject.Type == "request")
HandleRequest(dispatcherObject);
else if (dispatcherObject.Type == "error")
HandleError(dispatcherObject);
}
private void SendKeepAlive(UserContext context)
{
ts.TraceEvent(TraceEventType.Verbose, 0, "Sending keep alive");
try
{
Invoke("keep-alive", null);
ts.TraceEvent(TraceEventType.Information, 0, "Ok");
}
catch (Exception e)
{
ts.TraceEvent(TraceEventType.Error, 0, e.Message);
}
}
private void OnReceive(UserContext context, DataFrame frame)
{
try
{
OnReceiveCore(context, frame);
}
catch (Exception e)
{
ts.TraceEvent(TraceEventType.Error, 0, e.Message);
}
}
private void OnDisconnect(UserContext c)
{
this.Context = null;
this.keepAliveTimer.Dispose();
this.keepAliveTimer = null;
}
private void OnConnected(UserContext context)
{
this.keepAliveTimer = new Timer(PollServer, null, new TimeSpan(0, 0, 5), new TimeSpan(0, 0, 30));
}
private void OnConnect(UserContext context)
{
var dispatcher = new CommandDispatcher(context);
var id = context.RequestPath;
Debug.Assert(id.Length > 0);
id = id.Substring(1); // Strip first slash
var jukebox = EnsureJukebox(id);
if (jukebox.IsAttached)
{
dispatcher.Context.SetOnConnected((o) =>
{
dispatcher.Close(Constants.AlreadyConnectedError);
});
return;
}
ts.TraceEvent(TraceEventType.Information, 0, "Jukebox connected [id = '{0}']", id);
context.Data = jukebox;
jukebox.Start(dispatcher);
}
private void OnDisconnect(UserContext context)
{
var jukebox = context.Data as Jukebox;
if (jukebox != null)
ts.TraceEvent(TraceEventType.Information, 0, "Jukebox disconnected [id = '{0}']", jukebox.Identifier);
}