/* * Copyright (c) Contributors, http://opensimulator.org/ * See CONTRIBUTORS.TXT for a full list of copyright holders. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of the OpenSimulator Project nor the * names of its contributors may be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ using System; using System.Collections; using System.Threading; using System.Reflection; using log4net; using HttpServer; using OpenSim.Framework; using OpenSim.Framework.Monitoring; using Amib.Threading; using System.IO; using System.Text; using System.Collections.Generic; namespace OpenSim.Framework.Servers.HttpServer { public class PollServiceRequestManager { private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); private readonly BaseHttpServer m_server; private BlockingQueue m_requests = new BlockingQueue(); private static List m_longPollRequests = new List(); private uint m_WorkerThreadCount = 0; private Thread[] m_workerThreads; private bool m_running = true; private SmartThreadPool m_threadPool = new SmartThreadPool(20000, 12, 2); // private int m_timeout = 1000; // increase timeout 250; now use the event one public PollServiceRequestManager(BaseHttpServer pSrv, uint pWorkerThreadCount, int pTimeout) { m_server = pSrv; m_WorkerThreadCount = pWorkerThreadCount; m_workerThreads = new Thread[m_WorkerThreadCount]; } public void Start() { //startup worker threads for (uint i = 0; i < m_WorkerThreadCount; i++) { m_workerThreads[i] = Watchdog.StartThread( PoolWorkerJob, string.Format("PollServiceWorkerThread{0}:{1}", i, m_server.Port), ThreadPriority.Normal, false, false, null, int.MaxValue); } Watchdog.StartThread( this.CheckLongPollThreads, string.Format("LongPollServiceWatcherThread:{0}", m_server.Port), ThreadPriority.Normal, false, true, null, 1000 * 60 * 10); } private void ReQueueEvent(PollServiceHttpRequest req) { if (m_running) { // delay the enqueueing for 100ms. There's no need to have the event // actively on the queue Timer t = new Timer(self => { ((Timer)self).Dispose(); m_requests.Enqueue(req); }); t.Change(100, Timeout.Infinite); } } public void Enqueue(PollServiceHttpRequest req) { if (m_running) { if (req.PollServiceArgs.Type == PollServiceEventArgs.EventType.LongPoll) { lock (m_longPollRequests) m_longPollRequests.Add(req); } else m_requests.Enqueue(req); } } private void CheckLongPollThreads() { // The only purpose of this thread is to check the EQs for events. // If there are events, that thread will be placed in the "ready-to-serve" queue, m_requests. // If there are no events, that thread will be back to its "waiting" queue, m_longPollRequests. // All other types of tasks (Inventory handlers, http-in, etc) don't have the long-poll nature, // so if they aren't ready to be served by a worker thread (no events), they are placed // directly back in the "ready-to-serve" queue by the worker thread. while (m_running) { Thread.Sleep(500); Watchdog.UpdateThread(); // List not_ready = new List(); lock (m_longPollRequests) { if (m_longPollRequests.Count > 0 && m_running) { List ready = m_longPollRequests.FindAll(req => (req.PollServiceArgs.HasEvents(req.RequestID, req.PollServiceArgs.Id) || // there are events in this EQ (Environment.TickCount - req.RequestTime) > req.PollServiceArgs.TimeOutms) // no events, but timeout ); ready.ForEach(req => { m_requests.Enqueue(req); m_longPollRequests.Remove(req); }); } } } } public void Stop() { m_running = false; // m_timeout = -10000; // cause all to expire Thread.Sleep(1000); // let the world move foreach (Thread t in m_workerThreads) Watchdog.AbortThread(t.ManagedThreadId); PollServiceHttpRequest wreq; lock (m_longPollRequests) { if (m_longPollRequests.Count > 0 && m_running) m_longPollRequests.ForEach(req => m_requests.Enqueue(req)); } while (m_requests.Count() > 0) { try { wreq = m_requests.Dequeue(0); wreq.DoHTTPGruntWork( m_server, wreq.PollServiceArgs.NoEvents(wreq.RequestID, wreq.PollServiceArgs.Id)); } catch { } } m_longPollRequests.Clear(); m_requests.Clear(); } // work threads private void PoolWorkerJob() { while (m_running) { PollServiceHttpRequest req = m_requests.Dequeue(5000); //m_log.WarnFormat("[YYY]: Dequeued {0}", (req == null ? "null" : req.PollServiceArgs.Type.ToString())); Watchdog.UpdateThread(); if (req != null) { try { if (req.PollServiceArgs.HasEvents(req.RequestID, req.PollServiceArgs.Id)) { Hashtable responsedata = req.PollServiceArgs.GetEvents(req.RequestID, req.PollServiceArgs.Id); if (responsedata == null) continue; if (req.PollServiceArgs.Type == PollServiceEventArgs.EventType.LongPoll) // This is the event queue { try { req.DoHTTPGruntWork(m_server, responsedata); } catch (ObjectDisposedException) // Browser aborted before we could read body, server closed the stream { // Ignore it, no need to reply } } else { m_threadPool.QueueWorkItem(x => { try { req.DoHTTPGruntWork(m_server, responsedata); } catch (ObjectDisposedException) // Browser aborted before we could read body, server closed the stream { // Ignore it, no need to reply } return null; }, null); } } else { if ((Environment.TickCount - req.RequestTime) > req.PollServiceArgs.TimeOutms) { req.DoHTTPGruntWork( m_server, req.PollServiceArgs.NoEvents(req.RequestID, req.PollServiceArgs.Id)); } else { ReQueueEvent(req); } } } catch (Exception e) { m_log.ErrorFormat("Exception in poll service thread: " + e.ToString()); } } } } } }