internal void DeactivateCometWaitRequest(CometWaitRequest request)
{
lock (state)
{
request.DateDeactivated = DateTime.Now;
}
}
internal void QueueCometWaitRequest(CometWaitRequest request)
{
lock (state)
{
WaitRequests.Add(request);
}
}
private CometMessage[] CheckForServerPushMessages(CometWaitRequest request)
{
//
// ok, we we need to do is get the messages
// that are stored in the state provider
return(StateManager.StateProvider.GetMessages(request.ClientPrivateToken, request.LastMessageId));
}
/// <summary>
///
/// </summary>
/// <param name="context"></param>
/// <param name="callback"></param>
/// <param name="extraData"></param>
/// <returns></returns>
public IAsyncResult BeginSubscribe(HttpContext context, AsyncCallback callback, object extraData)
{
try
{
long lastMessageId;
string privateToken = string.Empty;
if (!long.TryParse(context.Request["lastMessageId"] ?? "-1", out lastMessageId))
{
throw CometException.CometHandlerParametersAreInvalidException();
}
privateToken = context.Request["privateToken"];
if (string.IsNullOrEmpty(privateToken))
{
throw CometException.CometHandlerParametersAreInvalidException();
}
this.DebugWriteThreadInfo("BeginSubscribe");
lock (state)
{
Debug.WriteLine("目前有几个客户端连接" + this.GetCometClients());
CometClient cometClient = this.GetCometClient(privateToken);
this.FireClientSubscribed(cometClient);
// 从所有线程的请求队列中找到该CometClient，将其排除
for (int i = 0; i < this.workerThreadCount; i++)
{
this.workerThreads[i].DequeueCometWaitRequest(privateToken);
}
CometWaitRequest request = new CometWaitRequest(privateToken, lastMessageId, context, callback, extraData);
this.workerThreads[this.currentThread].QueueCometWaitRequest(request);
this.currentThread++;
if (this.currentThread >= this.workerThreadCount)
{
this.currentThread = 0;
}
return(request.Result);
}
}
catch (Exception ex)
{
this.WriteErrorToResponse(context, ex.Message);
return(null);
}
}
private void CheckForIdleCometWaitRequest(CometWaitRequest request, CometClient cometClient)
{
lock (state)
{
if (DateTime.Now.Subtract(request.DateDeactivated.Value).TotalSeconds >= cometClient.ConnectionIdleSeconds)
{
// ok, this dude has timed out, so we remove it
StateManager.KillIdleCometClient(cometClient.PrivateToken);
// and deque the request
WaitRequests.Remove(request);
}
}
}
internal void DequeueCometWaitRequest(string privateToken)
{
lock (state)
{
for (int i = 0; i < WaitRequests.Count; i++)
{
CometWaitRequest request = WaitRequests[i];
if (request.ClientPrivateToken == privateToken)
{
WaitRequests.Remove(request);
break;
}
}
}
}
private void QueueCometWaitRequest_Finished(object target)
{
CometWaitRequest request = target as CometWaitRequest;
request.Result.SetCompleted();
}
