/// <summary>
/// notify a server that a client just connected
/// </summary>
/// <param name="client"></param>
public void SendClientConnect(UserContext client)
{
ServerContext server = PickServer();
Message resp = new Message();
resp.Type = ResponseType.Connection;
resp.Data = client.ClientAddress.ToString();
server.Send(Newtonsoft.Json.JsonConvert.SerializeObject(resp));
}
/// <summary>
/// Sends an error message to the client who caused the error
/// </summary>
/// <param name="ErrorMessage">Details of the error</param>
/// <param name="AContext">The user's connection context</param>
private static void SendError(string ErrorMessage, UserContext AContext, ServerMessage message)
{
Log.Warn("Error Message: " + ErrorMessage);
Message r = new Message();
r = new Message();
r.Type = ResponseType.Error;
r.Data = new { Message = ErrorMessage };
//AContext.Send(JsonConvert.SerializeObject(r));
}
// NOTE: This is not safe code. You may end up broadcasting to people who
// disconnected. Luckily for us, Alchemy handles exceptions in its event methods, so we don't
// have random, catastrophic changes.
/// <summary>
/// Event triggered when a user disconnected from a proxy
/// Remove a user from the online users list
/// and broadcast the disconnection message to all connected users.
/// </summary>
/// <param name="AContext">The user's connection context</param>
public static void OnDisconnect(RCATContext RContext, ServerMessage message)
{
try
{
Log.Info("[PROXY->SERVANT]: User disconnected: " + message.Data);
User user = dataConnector.GetUser(message.Data);
Message r = new Message();
if (!String.IsNullOrEmpty(user.n))
{
dataConnector.RemoveUser(user.n);
string[] clients = dataConnector.GetAllUsersNames();
RContext.Broadcast(new { n = user.n }, clients, ResponseType.Disconnect, message.TimeStamp);
}
else
Log.Warn("[PROXY->SERVANT]: User " + user.n + " not found OnDisconnect.");
}
catch (Exception e)
{
Log.Error("[PROXY->SERVANT]: Error in OnDisconnect.",e);
}
}
public void SendToClient(ClientMessage message)
{
string name = message.clients[0];
UserContext user = Proxy.onlineUsers[name];
try
{
Message m = new Message();
m.Type = message.Type;
m.Data = message.Data;
string json = JsonConvert.SerializeObject(m);
user.Send(json);
}
catch
{
Log.Debug("[PROXY->CLIENT]: User " + user + " not found.");
}
}
/// <summary>
///send the same data to multiple clients (broadcast contains the data to send and the array of clients to send to)
/// </summary>
/// <param name="broadcast"></param>
public void BroadcastToClients(ClientMessage broadcast)
{
try
{
string name = (string)broadcast.Data.SelectToken("n");
UserContext user = null;
if (Proxy.onlineUsers.ContainsKey(name))
user = Proxy.onlineUsers[name];
else
{
Log.Debug("User " + name + " not present in this Proxy");
return;
}
long lastupdate = user.LastUpdate;
if (broadcast.Type == ResponseType.Disconnect)
lastupdate = 0; // Just to be sure it will enter next if
user.SendingSemaphore.Wait();
if (broadcast.TimeStamp >= lastupdate)
{
user.LastUpdate = broadcast.TimeStamp;
Message m = new Message();
m.Type = broadcast.Type;
m.Data = broadcast.Data;
string json = JsonConvert.SerializeObject(m);
foreach (string client in broadcast.clients)
{
try
{
UserContext cl = Proxy.onlineUsers[client];
cl.Send(json);
}
catch
{
Log.Debug("[PROXY->CLIENT]: User " + client + " not found.");
}
}
}
else
{
user.LatePackets++;
user.SendingSemaphore.Release();
return;
}
if (broadcast.Type == ResponseType.Disconnect)
{
if (Proxy.onlineUsers.ContainsKey(name))
Proxy.onlineUsers.Remove(name);
}
else
{
user.SentCounter--;
if (user.SentCounter <= 0 && lastupdate > 0)
{
user.SentCounter = UserContext.DefaultSentCounter;
long timetoprocess = user.TimeToProcess;
LoggingObject logobj = new LoggingObject(broadcast.TimeStamp, user, timetoprocess);
ThreadPool.QueueUserWorkItem(new WaitCallback(LogRoundTrip), logobj);
user.TimeToProcess = DateTime.Now.Ticks;
}
}
user.SendingSemaphore.Release();
}
catch (Exception e)
{
Log.Error(e);
}
}