/// <summary>
/// Process messages received and takes proper action, all messages are json objects as string
/// </summary>
protected override void OnMessage(DiPSWebSockets.MessageEventArgs e)
{
try
{
base.OnMessage(e);
//The clientId must be sent by the client
var dEvent = JsonConvert.DeserializeObject<DiPSEvent>(e.Data);
var clientId = Context.QueryString["clientid"];
switch (dEvent.MessageType)
{
case MessageType.Subscribe:
if (!_EventsAndSubscribers.ContainsKey(dEvent.EventName))
_EventsAndSubscribers.Add(dEvent.EventName, new List<string>());
if (!_EventsAndSubscribers[dEvent.EventName].Contains(dEvent.ClientId))
_EventsAndSubscribers[dEvent.EventName].Add(dEvent.ClientId);
break;
case MessageType.Unsubscribe:
if (_EventsAndSubscribers.ContainsKey(dEvent.EventName) && _EventsAndSubscribers[dEvent.EventName].Contains(dEvent.ClientId))
_EventsAndSubscribers[dEvent.EventName].Remove(dEvent.ClientId);
break;
case MessageType.Publish:
if (!_EventsAndSubscribers.ContainsKey(dEvent.EventName))
return;
var clients = _EventsAndSubscribers[dEvent.EventName];
clients.ForEach((c) =>
{
//match the session id with the clientid
var session = Sessions.Sessions.FirstOrDefault(s => s.Context.QueryString["clientid"] == c);
//if the session was found, send the message
dEvent.MessageType = MessageType.EventFired;
if (session != null) //send it in another thread, this is helpful when we have many subscribers
ThreadPool.QueueUserWorkItem(new WaitCallback(SendInThreadAsync), new AsyncMessage { Event = dEvent, SessionId = session.ID });
});
break;
}
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
}
/// <summary>
/// Do nothing for now, TODO: log the errors
/// </summary>
protected override void OnError(DiPSWebSockets.ErrorEventArgs e)
{
base.OnError(e);
}
/// <summary>
/// We dont want to remove the subscriptions on close, because the client may reconnect, and when it does, it uses the same clientid
/// </summary>
/// <param name="e"></param>
protected override void OnClose(DiPSWebSockets.CloseEventArgs e)
{
base.OnClose(e);
}
