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diff --git a/OpenSim/Region/ScriptEngine/DotNetEngine/MaintenanceThread.cs b/OpenSim/Region/ScriptEngine/DotNetEngine/MaintenanceThread.cs
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1/*
2 * Copyright (c) Contributors, http://opensimulator.org/
3 * See CONTRIBUTORS.TXT for a full list of copyright holders.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of the OpenSimulator Project nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28using System;
29using System.Collections;
30using System.Reflection;
31using System.Threading;
32using log4net;
33using OpenSim.Framework;
34
35namespace OpenSim.Region.ScriptEngine.DotNetEngine
36{
37 /// <summary>
38 /// This class does maintenance on script engine.
39 /// </summary>
40 public class MaintenanceThread
41 {
42 private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
43
44 //public ScriptEngine m_ScriptEngine;
45 private int MaintenanceLoopms;
46 private int MaintenanceLoopTicks_ScriptLoadUnload;
47 private int MaintenanceLoopTicks_Other;
48
49
50 public MaintenanceThread()
51 {
52 //m_ScriptEngine = _ScriptEngine;
53
54 ReadConfig();
55
56 // Start maintenance thread
57 StartMaintenanceThread();
58 }
59
60 ~MaintenanceThread()
61 {
62 StopMaintenanceThread();
63 }
64
65 public void ReadConfig()
66 {
67 // Bad hack, but we need a m_ScriptEngine :)
68 lock (ScriptEngine.ScriptEngines)
69 {
70 foreach (ScriptEngine m_ScriptEngine in ScriptEngine.ScriptEngines)
71 {
72 MaintenanceLoopms = m_ScriptEngine.ScriptConfigSource.GetInt("MaintenanceLoopms", 50);
73 MaintenanceLoopTicks_ScriptLoadUnload =
74 m_ScriptEngine.ScriptConfigSource.GetInt("MaintenanceLoopTicks_ScriptLoadUnload", 1);
75 MaintenanceLoopTicks_Other =
76 m_ScriptEngine.ScriptConfigSource.GetInt("MaintenanceLoopTicks_Other", 10);
77
78 return;
79 }
80 }
81 }
82
83 #region " Maintenance thread "
84 /// <summary>
85 /// Maintenance thread. Enforcing max execution time for example.
86 /// </summary>
87 public Thread MaintenanceThreadThread;
88
89 /// <summary>
90 /// Starts maintenance thread
91 /// </summary>
92 private void StartMaintenanceThread()
93 {
94 if (MaintenanceThreadThread == null)
95 {
96 MaintenanceThreadThread = Watchdog.StartThread(MaintenanceLoop, "ScriptMaintenanceThread", ThreadPriority.Normal, true);
97 }
98 }
99
100 /// <summary>
101 /// Stops maintenance thread
102 /// </summary>
103 private void StopMaintenanceThread()
104 {
105#if DEBUG
106 //m_log.Debug("[" + m_ScriptEngine.ScriptEngineName + "]: StopMaintenanceThread() called");
107#endif
108 //PleaseShutdown = true;
109 Thread.Sleep(100);
110 try
111 {
112 if (MaintenanceThreadThread != null && MaintenanceThreadThread.IsAlive)
113 {
114 MaintenanceThreadThread.Abort();
115 }
116 }
117 catch (Exception)
118 {
119 //m_log.Error("[" + m_ScriptEngine.ScriptEngineName + "]: Exception stopping maintenence thread: " + ex.ToString());
120 }
121 }
122
123 // private ScriptEngine lastScriptEngine; // Keep track of what ScriptEngine instance we are at so we can give exception
124 /// <summary>
125 /// A thread should run in this loop and check all running scripts
126 /// </summary>
127 public void MaintenanceLoop()
128 {
129 //if (m_ScriptEngine.m_EventQueueManager.maxFunctionExecutionTimens < MaintenanceLoopms)
130 // m_log.Warn("[" + m_ScriptEngine.ScriptEngineName + "]: " +
131 // "Configuration error: MaxEventExecutionTimeMs is less than MaintenanceLoopms. The Maintenance Loop will only check scripts once per run.");
132
133 long Last_maxFunctionExecutionTimens = 0; // DateTime.Now.Ticks;
134 long Last_ReReadConfigFilens = DateTime.Now.Ticks;
135 int MaintenanceLoopTicks_ScriptLoadUnload_Count = 0;
136 int MaintenanceLoopTicks_Other_Count = 0;
137 bool MaintenanceLoopTicks_ScriptLoadUnload_ResetCount = false;
138 bool MaintenanceLoopTicks_Other_ResetCount = false;
139
140 while (true)
141 {
142 try
143 {
144 while (true)
145 {
146 Thread.Sleep(MaintenanceLoopms); // Sleep before next pass
147
148 // Reset counters?
149 if (MaintenanceLoopTicks_ScriptLoadUnload_ResetCount)
150 {
151 MaintenanceLoopTicks_ScriptLoadUnload_ResetCount = false;
152 MaintenanceLoopTicks_ScriptLoadUnload_Count = 0;
153 }
154 if (MaintenanceLoopTicks_Other_ResetCount)
155 {
156 MaintenanceLoopTicks_Other_ResetCount = false;
157 MaintenanceLoopTicks_Other_Count = 0;
158 }
159
160 // Increase our counters
161 MaintenanceLoopTicks_ScriptLoadUnload_Count++;
162 MaintenanceLoopTicks_Other_Count++;
163
164 foreach (ScriptEngine m_ScriptEngine in new ArrayList(ScriptEngine.ScriptEngines))
165 {
166 // lastScriptEngine = m_ScriptEngine;
167 // Re-reading config every x seconds
168 if (MaintenanceLoopTicks_Other_Count >= MaintenanceLoopTicks_Other)
169 {
170 MaintenanceLoopTicks_Other_ResetCount = true;
171 if (m_ScriptEngine.RefreshConfigFilens > 0)
172 {
173 // Check if its time to re-read config
174 if (DateTime.Now.Ticks - Last_ReReadConfigFilens >
175 m_ScriptEngine.RefreshConfigFilens)
176 {
177 //m_log.Debug("Time passed: " + (DateTime.Now.Ticks - Last_ReReadConfigFilens) + ">" + m_ScriptEngine.RefreshConfigFilens);
178 // Its time to re-read config file
179 m_ScriptEngine.ReadConfig();
180 Last_ReReadConfigFilens = DateTime.Now.Ticks; // Reset time
181 }
182
183
184 // Adjust number of running script threads if not correct
185 if (m_ScriptEngine.m_EventQueueManager != null)
186 m_ScriptEngine.m_EventQueueManager.AdjustNumberOfScriptThreads();
187
188 // Check if any script has exceeded its max execution time
189 if (EventQueueManager.EnforceMaxExecutionTime)
190 {
191 // We are enforcing execution time
192 if (DateTime.Now.Ticks - Last_maxFunctionExecutionTimens >
193 EventQueueManager.maxFunctionExecutionTimens)
194 {
195 // Its time to check again
196 m_ScriptEngine.m_EventQueueManager.CheckScriptMaxExecTime(); // Do check
197 Last_maxFunctionExecutionTimens = DateTime.Now.Ticks; // Reset time
198 }
199 }
200 }
201 }
202 if (MaintenanceLoopTicks_ScriptLoadUnload_Count >= MaintenanceLoopTicks_ScriptLoadUnload)
203 {
204 MaintenanceLoopTicks_ScriptLoadUnload_ResetCount = true;
205 // LOAD / UNLOAD SCRIPTS
206 if (m_ScriptEngine.m_ScriptManager != null)
207 m_ScriptEngine.m_ScriptManager.DoScriptLoadUnload();
208 }
209 }
210
211 Watchdog.UpdateThread();
212 }
213 }
214 catch(ThreadAbortException)
215 {
216 m_log.Error("Thread aborted in MaintenanceLoopThread. If this is during shutdown, please ignore");
217 }
218 catch (Exception ex)
219 {
220 m_log.ErrorFormat("Exception in MaintenanceLoopThread. Thread will recover after 5 sec throttle. Exception: {0}", ex.ToString());
221 }
222 }
223
224 Watchdog.RemoveThread();
225 }
226 #endregion
227
228 ///// <summary>
229 ///// If set to true then threads and stuff should try to make a graceful exit
230 ///// </summary>
231 //public bool PleaseShutdown
232 //{
233 // get { return _PleaseShutdown; }
234 // set { _PleaseShutdown = value; }
235 //}
236 //private bool _PleaseShutdown = false;
237 }
238}
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