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/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/AsyncCommandManager.cs
@@ -1,184 +1,184 @@
/*
* 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.Collections.Generic;
using System.Reflection;
using System.Threading;
using log4net;
using OpenMetaverse;
using OpenSim.Framework;
using OpenSim.Framework.Monitoring;
using OpenSim.Region.Framework.Interfaces;
using OpenSim.Region.ScriptEngine.Interfaces;
using OpenSim.Region.ScriptEngine.Shared;
using OpenSim.Region.ScriptEngine.Shared.Api.Plugins;
using Timer=OpenSim.Region.ScriptEngine.Shared.Api.Plugins.Timer;
 
namespace OpenSim.Region.ScriptEngine.Shared.Api
{
/// <summary>
/// Handles LSL commands that takes long time and returns an event, for example timers, HTTP requests, etc.
/// </summary>
public class AsyncCommandManager
{
private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
 
private static Thread cmdHandlerThread;
/*
* 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.Collections.Generic;
using System.Reflection;
using System.Threading;
using log4net;
using OpenMetaverse;
using OpenSim.Framework;
using OpenSim.Framework.Monitoring;
using OpenSim.Region.Framework.Interfaces;
using OpenSim.Region.ScriptEngine.Interfaces;
using OpenSim.Region.ScriptEngine.Shared;
using OpenSim.Region.ScriptEngine.Shared.Api.Plugins;
using Timer=OpenSim.Region.ScriptEngine.Shared.Api.Plugins.Timer;
 
namespace OpenSim.Region.ScriptEngine.Shared.Api
{
/// <summary>
/// Handles LSL commands that takes long time and returns an event, for example timers, HTTP requests, etc.
/// </summary>
public class AsyncCommandManager
{
private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
 
private static Thread cmdHandlerThread;
private static int cmdHandlerThreadCycleSleepms;
private static readonly System.Timers.Timer cmdEventTimer = new System.Timers.Timer();
 
/// <summary>
/// Lock for reading/writing static components of AsyncCommandManager.
/// </summary>
/// <remarks>
/// This lock exists so that multiple threads from different engines and/or different copies of the same engine
/// are prevented from running non-thread safe code (e.g. read/write of lists) concurrently.
/// </remarks>
private static object staticLock = new object();
 
private static List<IScriptEngine> m_ScriptEngines =
new List<IScriptEngine>();
 
public IScriptEngine m_ScriptEngine;
 
private static Dictionary<IScriptEngine, Dataserver> m_Dataserver =
new Dictionary<IScriptEngine, Dataserver>();
private static Dictionary<IScriptEngine, Timer> m_Timer =
new Dictionary<IScriptEngine, Timer>();
private static Dictionary<IScriptEngine, Listener> m_Listener =
new Dictionary<IScriptEngine, Listener>();
private static Dictionary<IScriptEngine, HttpRequest> m_HttpRequest =
new Dictionary<IScriptEngine, HttpRequest>();
private static Dictionary<IScriptEngine, SensorRepeat> m_SensorRepeat =
new Dictionary<IScriptEngine, SensorRepeat>();
private static Dictionary<IScriptEngine, XmlRequest> m_XmlRequest =
new Dictionary<IScriptEngine, XmlRequest>();
 
public Dataserver DataserverPlugin
{
get
{
lock (staticLock)
return m_Dataserver[m_ScriptEngine];
}
}
 
public Timer TimerPlugin
{
get
{
lock (staticLock)
return m_Timer[m_ScriptEngine];
}
}
 
public HttpRequest HttpRequestPlugin
{
get
{
lock (staticLock)
return m_HttpRequest[m_ScriptEngine];
}
}
 
public Listener ListenerPlugin
{
get
{
lock (staticLock)
return m_Listener[m_ScriptEngine];
}
}
 
public SensorRepeat SensorRepeatPlugin
{
get
{
lock (staticLock)
return m_SensorRepeat[m_ScriptEngine];
}
}
 
public XmlRequest XmlRequestPlugin
{
get
{
lock (staticLock)
return m_XmlRequest[m_ScriptEngine];
}
}
 
public IScriptEngine[] ScriptEngines
{
get
{
lock (staticLock)
return m_ScriptEngines.ToArray();
}
}
 
public AsyncCommandManager(IScriptEngine _ScriptEngine)
{
m_ScriptEngine = _ScriptEngine;
 
// If there is more than one scene in the simulator or multiple script engines are used on the same region
// then more than one thread could arrive at this block of code simultaneously. However, it cannot be
// executed concurrently both because concurrent list operations are not thread-safe and because of other
// race conditions such as the later check of cmdHandlerThread == null.
lock (staticLock)
{
if (m_ScriptEngines.Count == 0)
ReadConfig();
 
if (!m_ScriptEngines.Contains(m_ScriptEngine))
m_ScriptEngines.Add(m_ScriptEngine);
 
// Create instances of all plugins
if (!m_Dataserver.ContainsKey(m_ScriptEngine))
m_Dataserver[m_ScriptEngine] = new Dataserver(this);
if (!m_Timer.ContainsKey(m_ScriptEngine))
m_Timer[m_ScriptEngine] = new Timer(this);
if (!m_HttpRequest.ContainsKey(m_ScriptEngine))
m_HttpRequest[m_ScriptEngine] = new HttpRequest(this);
if (!m_Listener.ContainsKey(m_ScriptEngine))
m_Listener[m_ScriptEngine] = new Listener(this);
if (!m_SensorRepeat.ContainsKey(m_ScriptEngine))
m_SensorRepeat[m_ScriptEngine] = new SensorRepeat(this);
if (!m_XmlRequest.ContainsKey(m_ScriptEngine))
m_XmlRequest[m_ScriptEngine] = new XmlRequest(this);
 
StartThread();
}
}
 
private static void StartThread()
private static readonly System.Timers.Timer cmdEventTimer = new System.Timers.Timer();
 
/// <summary>
/// Lock for reading/writing static components of AsyncCommandManager.
/// </summary>
/// <remarks>
/// This lock exists so that multiple threads from different engines and/or different copies of the same engine
/// are prevented from running non-thread safe code (e.g. read/write of lists) concurrently.
/// </remarks>
private static object staticLock = new object();
 
private static List<IScriptEngine> m_ScriptEngines =
new List<IScriptEngine>();
 
public IScriptEngine m_ScriptEngine;
 
private static Dictionary<IScriptEngine, Dataserver> m_Dataserver =
new Dictionary<IScriptEngine, Dataserver>();
private static Dictionary<IScriptEngine, Timer> m_Timer =
new Dictionary<IScriptEngine, Timer>();
private static Dictionary<IScriptEngine, Listener> m_Listener =
new Dictionary<IScriptEngine, Listener>();
private static Dictionary<IScriptEngine, HttpRequest> m_HttpRequest =
new Dictionary<IScriptEngine, HttpRequest>();
private static Dictionary<IScriptEngine, SensorRepeat> m_SensorRepeat =
new Dictionary<IScriptEngine, SensorRepeat>();
private static Dictionary<IScriptEngine, XmlRequest> m_XmlRequest =
new Dictionary<IScriptEngine, XmlRequest>();
 
public Dataserver DataserverPlugin
{
get
{
lock (staticLock)
return m_Dataserver[m_ScriptEngine];
}
}
 
public Timer TimerPlugin
{
get
{
lock (staticLock)
return m_Timer[m_ScriptEngine];
}
}
 
public HttpRequest HttpRequestPlugin
{
get
{
lock (staticLock)
return m_HttpRequest[m_ScriptEngine];
}
}
 
public Listener ListenerPlugin
{
get
{
lock (staticLock)
return m_Listener[m_ScriptEngine];
}
}
 
public SensorRepeat SensorRepeatPlugin
{
get
{
lock (staticLock)
return m_SensorRepeat[m_ScriptEngine];
}
}
 
public XmlRequest XmlRequestPlugin
{
get
{
lock (staticLock)
return m_XmlRequest[m_ScriptEngine];
}
}
 
public IScriptEngine[] ScriptEngines
{
get
{
lock (staticLock)
return m_ScriptEngines.ToArray();
}
}
 
public AsyncCommandManager(IScriptEngine _ScriptEngine)
{
m_ScriptEngine = _ScriptEngine;
 
// If there is more than one scene in the simulator or multiple script engines are used on the same region
// then more than one thread could arrive at this block of code simultaneously. However, it cannot be
// executed concurrently both because concurrent list operations are not thread-safe and because of other
// race conditions such as the later check of cmdHandlerThread == null.
lock (staticLock)
{
if (m_ScriptEngines.Count == 0)
ReadConfig();
 
if (!m_ScriptEngines.Contains(m_ScriptEngine))
m_ScriptEngines.Add(m_ScriptEngine);
 
// Create instances of all plugins
if (!m_Dataserver.ContainsKey(m_ScriptEngine))
m_Dataserver[m_ScriptEngine] = new Dataserver(this);
if (!m_Timer.ContainsKey(m_ScriptEngine))
m_Timer[m_ScriptEngine] = new Timer(this);
if (!m_HttpRequest.ContainsKey(m_ScriptEngine))
m_HttpRequest[m_ScriptEngine] = new HttpRequest(this);
if (!m_Listener.ContainsKey(m_ScriptEngine))
m_Listener[m_ScriptEngine] = new Listener(this);
if (!m_SensorRepeat.ContainsKey(m_ScriptEngine))
m_SensorRepeat[m_ScriptEngine] = new SensorRepeat(this);
if (!m_XmlRequest.ContainsKey(m_ScriptEngine))
m_XmlRequest[m_ScriptEngine] = new XmlRequest(this);
 
StartThread();
}
}
 
private static void StartThread()
{
if (!cmdEventTimer.Enabled.Equals(false)) return;
// Start the timer event
cmdEventTimer.Elapsed += (sender, args) =>
@@ -194,236 +194,236 @@
};
cmdEventTimer.Interval = cmdHandlerThreadCycleSleepms;
cmdEventTimer.Enabled = true;
}
 
private void ReadConfig()
{
// cmdHandlerThreadCycleSleepms = m_ScriptEngine.Config.GetInt("AsyncLLCommandLoopms", 100);
// TODO: Make this sane again
cmdHandlerThreadCycleSleepms = 100;
}
 
~AsyncCommandManager()
{
// Shut down thread
// try
// {
// if (cmdHandlerThread != null)
// {
// if (cmdHandlerThread.IsAlive == true)
// {
// cmdHandlerThread.Abort();
// //cmdHandlerThread.Join();
// }
// }
// }
// catch
// {
// }
}
 
private static void DoOneCmdHandlerPass()
{
lock (staticLock)
{
// Check HttpRequests
m_HttpRequest[m_ScriptEngines[0]].CheckHttpRequests();
 
// Check XMLRPCRequests
m_XmlRequest[m_ScriptEngines[0]].CheckXMLRPCRequests();
 
foreach (IScriptEngine s in m_ScriptEngines)
{
// Check Listeners
m_Listener[s].CheckListeners();
 
// Check timers
m_Timer[s].CheckTimerEvents();
 
// Check Sensors
m_SensorRepeat[s].CheckSenseRepeaterEvents();
 
// Check dataserver
m_Dataserver[s].ExpireRequests();
}
}
}
 
/// <summary>
/// Remove a specific script (and all its pending commands)
/// </summary>
/// <param name="localID"></param>
/// <param name="itemID"></param>
public static void RemoveScript(IScriptEngine engine, uint localID, UUID itemID)
{
// m_log.DebugFormat("[ASYNC COMMAND MANAGER]: Removing facilities for script {0}", itemID);
 
lock (staticLock)
{
// Remove dataserver events
m_Dataserver[engine].RemoveEvents(localID, itemID);
 
// Remove from: Timers
m_Timer[engine].UnSetTimerEvents(localID, itemID);
 
// Remove from: HttpRequest
IHttpRequestModule iHttpReq = engine.World.RequestModuleInterface<IHttpRequestModule>();
if (iHttpReq != null)
iHttpReq.StopHttpRequestsForScript(itemID);
 
IWorldComm comms = engine.World.RequestModuleInterface<IWorldComm>();
if (comms != null)
comms.DeleteListener(itemID);
 
IXMLRPC xmlrpc = engine.World.RequestModuleInterface<IXMLRPC>();
if (xmlrpc != null)
{
xmlrpc.DeleteChannels(itemID);
xmlrpc.CancelSRDRequests(itemID);
}
 
// Remove Sensors
m_SensorRepeat[engine].UnSetSenseRepeaterEvents(localID, itemID);
}
}
 
/// <summary>
/// Get the sensor repeat plugin for this script engine.
/// </summary>
/// <param name="engine"></param>
/// <returns></returns>
public static SensorRepeat GetSensorRepeatPlugin(IScriptEngine engine)
{
lock (staticLock)
{
if (m_SensorRepeat.ContainsKey(engine))
return m_SensorRepeat[engine];
else
return null;
}
}
 
/// <summary>
/// Get the dataserver plugin for this script engine.
/// </summary>
/// <param name="engine"></param>
/// <returns></returns>
public static Dataserver GetDataserverPlugin(IScriptEngine engine)
{
lock (staticLock)
{
if (m_Dataserver.ContainsKey(engine))
return m_Dataserver[engine];
else
return null;
}
}
 
/// <summary>
/// Get the timer plugin for this script engine.
/// </summary>
/// <param name="engine"></param>
/// <returns></returns>
public static Timer GetTimerPlugin(IScriptEngine engine)
{
lock (staticLock)
{
if (m_Timer.ContainsKey(engine))
return m_Timer[engine];
else
return null;
}
}
 
/// <summary>
/// Get the listener plugin for this script engine.
/// </summary>
/// <param name="engine"></param>
/// <returns></returns>
public static Listener GetListenerPlugin(IScriptEngine engine)
{
lock (staticLock)
{
if (m_Listener.ContainsKey(engine))
return m_Listener[engine];
else
return null;
}
}
 
public static Object[] GetSerializationData(IScriptEngine engine, UUID itemID)
{
List<Object> data = new List<Object>();
 
lock (staticLock)
{
Object[] listeners = m_Listener[engine].GetSerializationData(itemID);
if (listeners.Length > 0)
{
data.Add("listener");
data.Add(listeners.Length);
data.AddRange(listeners);
}
 
Object[] timers=m_Timer[engine].GetSerializationData(itemID);
if (timers.Length > 0)
{
data.Add("timer");
data.Add(timers.Length);
data.AddRange(timers);
}
 
Object[] sensors = m_SensorRepeat[engine].GetSerializationData(itemID);
if (sensors.Length > 0)
{
data.Add("sensor");
data.Add(sensors.Length);
data.AddRange(sensors);
}
}
 
return data.ToArray();
}
 
public static void CreateFromData(IScriptEngine engine, uint localID,
UUID itemID, UUID hostID, Object[] data)
{
int idx = 0;
int len;
 
while (idx < data.Length)
{
string type = data[idx].ToString();
len = (int)data[idx+1];
idx+=2;
 
if (len > 0)
{
Object[] item = new Object[len];
Array.Copy(data, idx, item, 0, len);
 
idx+=len;
 
lock (staticLock)
{
switch (type)
{
case "listener":
m_Listener[engine].CreateFromData(localID, itemID,
hostID, item);
break;
case "timer":
m_Timer[engine].CreateFromData(localID, itemID,
hostID, item);
break;
case "sensor":
m_SensorRepeat[engine].CreateFromData(localID,
itemID, hostID, item);
break;
}
}
}
}
}
}
}
}
 
private void ReadConfig()
{
// cmdHandlerThreadCycleSleepms = m_ScriptEngine.Config.GetInt("AsyncLLCommandLoopms", 100);
// TODO: Make this sane again
cmdHandlerThreadCycleSleepms = 10;
}
 
~AsyncCommandManager()
{
// Shut down thread
// try
// {
// if (cmdHandlerThread != null)
// {
// if (cmdHandlerThread.IsAlive == true)
// {
// cmdHandlerThread.Abort();
// //cmdHandlerThread.Join();
// }
// }
// }
// catch
// {
// }
}
 
private static void DoOneCmdHandlerPass()
{
lock (staticLock)
{
// Check HttpRequests
m_HttpRequest[m_ScriptEngines[0]].CheckHttpRequests();
 
// Check XMLRPCRequests
m_XmlRequest[m_ScriptEngines[0]].CheckXMLRPCRequests();
 
foreach (IScriptEngine s in m_ScriptEngines)
{
// Check Listeners
m_Listener[s].CheckListeners();
 
// Check timers
m_Timer[s].CheckTimerEvents();
 
// Check Sensors
m_SensorRepeat[s].CheckSenseRepeaterEvents();
 
// Check dataserver
m_Dataserver[s].ExpireRequests();
}
}
}
 
/// <summary>
/// Remove a specific script (and all its pending commands)
/// </summary>
/// <param name="localID"></param>
/// <param name="itemID"></param>
public static void RemoveScript(IScriptEngine engine, uint localID, UUID itemID)
{
// m_log.DebugFormat("[ASYNC COMMAND MANAGER]: Removing facilities for script {0}", itemID);
 
lock (staticLock)
{
// Remove dataserver events
m_Dataserver[engine].RemoveEvents(localID, itemID);
 
// Remove from: Timers
m_Timer[engine].UnSetTimerEvents(localID, itemID);
 
// Remove from: HttpRequest
IHttpRequestModule iHttpReq = engine.World.RequestModuleInterface<IHttpRequestModule>();
if (iHttpReq != null)
iHttpReq.StopHttpRequestsForScript(itemID);
 
IWorldComm comms = engine.World.RequestModuleInterface<IWorldComm>();
if (comms != null)
comms.DeleteListener(itemID);
 
IXMLRPC xmlrpc = engine.World.RequestModuleInterface<IXMLRPC>();
if (xmlrpc != null)
{
xmlrpc.DeleteChannels(itemID);
xmlrpc.CancelSRDRequests(itemID);
}
 
// Remove Sensors
m_SensorRepeat[engine].UnSetSenseRepeaterEvents(localID, itemID);
}
}
 
/// <summary>
/// Get the sensor repeat plugin for this script engine.
/// </summary>
/// <param name="engine"></param>
/// <returns></returns>
public static SensorRepeat GetSensorRepeatPlugin(IScriptEngine engine)
{
lock (staticLock)
{
if (m_SensorRepeat.ContainsKey(engine))
return m_SensorRepeat[engine];
else
return null;
}
}
 
/// <summary>
/// Get the dataserver plugin for this script engine.
/// </summary>
/// <param name="engine"></param>
/// <returns></returns>
public static Dataserver GetDataserverPlugin(IScriptEngine engine)
{
lock (staticLock)
{
if (m_Dataserver.ContainsKey(engine))
return m_Dataserver[engine];
else
return null;
}
}
 
/// <summary>
/// Get the timer plugin for this script engine.
/// </summary>
/// <param name="engine"></param>
/// <returns></returns>
public static Timer GetTimerPlugin(IScriptEngine engine)
{
lock (staticLock)
{
if (m_Timer.ContainsKey(engine))
return m_Timer[engine];
else
return null;
}
}
 
/// <summary>
/// Get the listener plugin for this script engine.
/// </summary>
/// <param name="engine"></param>
/// <returns></returns>
public static Listener GetListenerPlugin(IScriptEngine engine)
{
lock (staticLock)
{
if (m_Listener.ContainsKey(engine))
return m_Listener[engine];
else
return null;
}
}
 
public static Object[] GetSerializationData(IScriptEngine engine, UUID itemID)
{
List<Object> data = new List<Object>();
 
lock (staticLock)
{
Object[] listeners = m_Listener[engine].GetSerializationData(itemID);
if (listeners.Length > 0)
{
data.Add("listener");
data.Add(listeners.Length);
data.AddRange(listeners);
}
 
Object[] timers=m_Timer[engine].GetSerializationData(itemID);
if (timers.Length > 0)
{
data.Add("timer");
data.Add(timers.Length);
data.AddRange(timers);
}
 
Object[] sensors = m_SensorRepeat[engine].GetSerializationData(itemID);
if (sensors.Length > 0)
{
data.Add("sensor");
data.Add(sensors.Length);
data.AddRange(sensors);
}
}
 
return data.ToArray();
}
 
public static void CreateFromData(IScriptEngine engine, uint localID,
UUID itemID, UUID hostID, Object[] data)
{
int idx = 0;
int len;
 
while (idx < data.Length)
{
string type = data[idx].ToString();
len = (int)data[idx+1];
idx+=2;
 
if (len > 0)
{
Object[] item = new Object[len];
Array.Copy(data, idx, item, 0, len);
 
idx+=len;
 
lock (staticLock)
{
switch (type)
{
case "listener":
m_Listener[engine].CreateFromData(localID, itemID,
hostID, item);
break;
case "timer":
m_Timer[engine].CreateFromData(localID, itemID,
hostID, item);
break;
case "sensor":
m_SensorRepeat[engine].CreateFromData(localID,
itemID, hostID, item);
break;
}
}
}
}
}
}
}