opensim-development – Blame information for rev 1
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1 | eva | 1 | /* |
2 | * Copyright (c) Contributors, http://opensimulator.org/ |
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3 | * See CONTRIBUTORS.TXT for a full list of copyright holders. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions are met: |
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7 | * * Redistributions of source code must retain the above copyright |
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8 | * notice, this list of conditions and the following disclaimer. |
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9 | * * Redistributions in binary form must reproduce the above copyright |
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10 | * notice, this list of conditions and the following disclaimer in the |
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11 | * documentation and/or other materials provided with the distribution. |
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12 | * * Neither the name of the OpenSimulator Project nor the |
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13 | * names of its contributors may be used to endorse or promote products |
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14 | * derived from this software without specific prior written permission. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY |
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17 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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18 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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19 | * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY |
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20 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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21 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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22 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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23 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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25 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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26 | */ |
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27 | |||
28 | using System; |
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29 | using System.Collections; |
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30 | using System.Threading; |
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31 | using System.Reflection; |
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32 | using log4net; |
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33 | using HttpServer; |
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34 | using OpenSim.Framework; |
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35 | using OpenSim.Framework.Monitoring; |
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36 | using Amib.Threading; |
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37 | using System.IO; |
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38 | using System.Text; |
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39 | using System.Collections.Generic; |
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40 | |||
41 | namespace OpenSim.Framework.Servers.HttpServer |
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42 | { |
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43 | public class PollServiceRequestManager |
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44 | { |
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45 | private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); |
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46 | |||
47 | private readonly BaseHttpServer m_server; |
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48 | |||
49 | private BlockingQueue<PollServiceHttpRequest> m_requests = new BlockingQueue<PollServiceHttpRequest>(); |
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50 | private static List<PollServiceHttpRequest> m_longPollRequests = new List<PollServiceHttpRequest>(); |
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51 | |||
52 | private uint m_WorkerThreadCount = 0; |
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53 | private Thread[] m_workerThreads; |
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54 | |||
55 | private bool m_running = true; |
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56 | |||
57 | private SmartThreadPool m_threadPool = new SmartThreadPool(20000, 12, 2); |
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58 | |||
59 | // private int m_timeout = 1000; // increase timeout 250; now use the event one |
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60 | |||
61 | public PollServiceRequestManager(BaseHttpServer pSrv, uint pWorkerThreadCount, int pTimeout) |
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62 | { |
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63 | m_server = pSrv; |
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64 | m_WorkerThreadCount = pWorkerThreadCount; |
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65 | m_workerThreads = new Thread[m_WorkerThreadCount]; |
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66 | } |
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67 | |||
68 | public void Start() |
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69 | { |
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70 | //startup worker threads |
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71 | for (uint i = 0; i < m_WorkerThreadCount; i++) |
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72 | { |
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73 | m_workerThreads[i] |
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74 | = Watchdog.StartThread( |
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75 | PoolWorkerJob, |
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76 | string.Format("PollServiceWorkerThread{0}:{1}", i, m_server.Port), |
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77 | ThreadPriority.Normal, |
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78 | false, |
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79 | false, |
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80 | null, |
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81 | int.MaxValue); |
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82 | } |
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83 | |||
84 | Watchdog.StartThread( |
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85 | this.CheckLongPollThreads, |
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86 | string.Format("LongPollServiceWatcherThread:{0}", m_server.Port), |
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87 | ThreadPriority.Normal, |
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88 | false, |
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89 | true, |
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90 | null, |
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91 | 1000 * 60 * 10); |
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92 | } |
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93 | |||
94 | private void ReQueueEvent(PollServiceHttpRequest req) |
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95 | { |
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96 | if (m_running) |
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97 | { |
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98 | // delay the enqueueing for 100ms. There's no need to have the event |
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99 | // actively on the queue |
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100 | Timer t = new Timer(self => { |
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101 | ((Timer)self).Dispose(); |
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102 | m_requests.Enqueue(req); |
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103 | }); |
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104 | |||
105 | t.Change(100, Timeout.Infinite); |
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106 | |||
107 | } |
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108 | } |
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109 | |||
110 | public void Enqueue(PollServiceHttpRequest req) |
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111 | { |
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112 | if (m_running) |
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113 | { |
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114 | if (req.PollServiceArgs.Type == PollServiceEventArgs.EventType.LongPoll) |
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115 | { |
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116 | lock (m_longPollRequests) |
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117 | m_longPollRequests.Add(req); |
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118 | } |
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119 | else |
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120 | m_requests.Enqueue(req); |
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121 | } |
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122 | } |
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123 | |||
124 | private void CheckLongPollThreads() |
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125 | { |
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126 | // The only purpose of this thread is to check the EQs for events. |
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127 | // If there are events, that thread will be placed in the "ready-to-serve" queue, m_requests. |
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128 | // If there are no events, that thread will be back to its "waiting" queue, m_longPollRequests. |
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129 | // All other types of tasks (Inventory handlers, http-in, etc) don't have the long-poll nature, |
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130 | // so if they aren't ready to be served by a worker thread (no events), they are placed |
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131 | // directly back in the "ready-to-serve" queue by the worker thread. |
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132 | while (m_running) |
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133 | { |
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134 | Thread.Sleep(500); |
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135 | Watchdog.UpdateThread(); |
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136 | |||
137 | // List<PollServiceHttpRequest> not_ready = new List<PollServiceHttpRequest>(); |
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138 | lock (m_longPollRequests) |
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139 | { |
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140 | if (m_longPollRequests.Count > 0 && m_running) |
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141 | { |
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142 | List<PollServiceHttpRequest> ready = m_longPollRequests.FindAll(req => |
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143 | (req.PollServiceArgs.HasEvents(req.RequestID, req.PollServiceArgs.Id) || // there are events in this EQ |
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144 | (Environment.TickCount - req.RequestTime) > req.PollServiceArgs.TimeOutms) // no events, but timeout |
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145 | ); |
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146 | |||
147 | ready.ForEach(req => |
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148 | { |
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149 | m_requests.Enqueue(req); |
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150 | m_longPollRequests.Remove(req); |
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151 | }); |
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152 | |||
153 | } |
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154 | |||
155 | } |
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156 | } |
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157 | } |
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158 | |||
159 | public void Stop() |
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160 | { |
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161 | m_running = false; |
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162 | // m_timeout = -10000; // cause all to expire |
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163 | Thread.Sleep(1000); // let the world move |
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164 | |||
165 | foreach (Thread t in m_workerThreads) |
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166 | Watchdog.AbortThread(t.ManagedThreadId); |
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167 | |||
168 | PollServiceHttpRequest wreq; |
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169 | |||
170 | lock (m_longPollRequests) |
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171 | { |
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172 | if (m_longPollRequests.Count > 0 && m_running) |
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173 | m_longPollRequests.ForEach(req => m_requests.Enqueue(req)); |
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174 | } |
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175 | |||
176 | while (m_requests.Count() > 0) |
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177 | { |
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178 | try |
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179 | { |
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180 | wreq = m_requests.Dequeue(0); |
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181 | wreq.DoHTTPGruntWork( |
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182 | m_server, wreq.PollServiceArgs.NoEvents(wreq.RequestID, wreq.PollServiceArgs.Id)); |
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183 | } |
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184 | catch |
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185 | { |
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186 | } |
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187 | } |
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188 | |||
189 | m_longPollRequests.Clear(); |
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190 | m_requests.Clear(); |
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191 | } |
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192 | |||
193 | // work threads |
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194 | |||
195 | private void PoolWorkerJob() |
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196 | { |
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197 | while (m_running) |
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198 | { |
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199 | PollServiceHttpRequest req = m_requests.Dequeue(5000); |
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200 | //m_log.WarnFormat("[YYY]: Dequeued {0}", (req == null ? "null" : req.PollServiceArgs.Type.ToString())); |
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201 | |||
202 | Watchdog.UpdateThread(); |
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203 | if (req != null) |
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204 | { |
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205 | try |
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206 | { |
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207 | if (req.PollServiceArgs.HasEvents(req.RequestID, req.PollServiceArgs.Id)) |
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208 | { |
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209 | Hashtable responsedata = req.PollServiceArgs.GetEvents(req.RequestID, req.PollServiceArgs.Id); |
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210 | |||
211 | if (responsedata == null) |
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212 | continue; |
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213 | |||
214 | if (req.PollServiceArgs.Type == PollServiceEventArgs.EventType.LongPoll) // This is the event queue |
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215 | { |
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216 | try |
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217 | { |
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218 | req.DoHTTPGruntWork(m_server, responsedata); |
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219 | } |
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220 | catch (ObjectDisposedException) // Browser aborted before we could read body, server closed the stream |
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221 | { |
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222 | // Ignore it, no need to reply |
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223 | } |
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224 | } |
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225 | else |
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226 | { |
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227 | m_threadPool.QueueWorkItem(x => |
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228 | { |
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229 | try |
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230 | { |
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231 | req.DoHTTPGruntWork(m_server, responsedata); |
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232 | } |
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233 | catch (ObjectDisposedException) // Browser aborted before we could read body, server closed the stream |
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234 | { |
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235 | // Ignore it, no need to reply |
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236 | } |
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237 | |||
238 | return null; |
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239 | }, null); |
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240 | } |
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241 | } |
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242 | else |
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243 | { |
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244 | if ((Environment.TickCount - req.RequestTime) > req.PollServiceArgs.TimeOutms) |
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245 | { |
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246 | req.DoHTTPGruntWork( |
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247 | m_server, req.PollServiceArgs.NoEvents(req.RequestID, req.PollServiceArgs.Id)); |
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248 | } |
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249 | else |
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250 | { |
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251 | ReQueueEvent(req); |
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252 | } |
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253 | } |
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254 | } |
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255 | catch (Exception e) |
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256 | { |
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257 | m_log.ErrorFormat("Exception in poll service thread: " + e.ToString()); |
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258 | } |
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259 | } |
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260 | } |
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261 | } |
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262 | } |
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263 | } |