diff --git a/OpenSim/Region/CoreModules/Framework/EntityTransfer/HGIncomingSceneObjectEngine.cs b/OpenSim/Region/CoreModules/Framework/EntityTransfer/HGIncomingSceneObjectEngine.cs
new file mode 100644
index 0000000000..5cf2e1f37b
--- /dev/null
+++ b/OpenSim/Region/CoreModules/Framework/EntityTransfer/HGIncomingSceneObjectEngine.cs
@@ -0,0 +1,327 @@
+/*
+ * 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.Concurrent;
+using System.Reflection;
+using System.Threading;
+using log4net;
+using OpenSim.Framework;
+using OpenSim.Framework.Monitoring;
+using OpenSim.Region.Framework.Scenes;
+
+namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
+{
+ public class Job
+ {
+ public string Name;
+ public WaitCallback Callback;
+ public object O;
+
+ public Job(string name, WaitCallback callback, object o)
+ {
+ Name = name;
+ Callback = callback;
+ O = o;
+ }
+ }
+
+ // TODO: These kinds of classes MUST be generalized with JobEngine, etc.
+ public class HGIncomingSceneObjectEngine
+ {
+ private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+ public int LogLevel { get; set; }
+
+ public bool IsRunning { get; private set; }
+
+ public string Name { get; set; }
+
+ ///
+ /// The timeout in milliseconds to wait for at least one event to be written when the recorder is stopping.
+ ///
+ public int RequestProcessTimeoutOnStop { get; set; }
+
+ ///
+ /// Controls whether we need to warn in the log about exceeding the max queue size.
+ ///
+ ///
+ /// This is flipped to false once queue max has been exceeded and back to true when it falls below max, in
+ /// order to avoid spamming the log with lots of warnings.
+ ///
+ private bool m_warnOverMaxQueue = true;
+
+ private BlockingCollection m_requestQueue;
+
+ private CancellationTokenSource m_cancelSource = new CancellationTokenSource();
+
+ private Stat m_requestsWaitingStat;
+
+ private Job m_currentJob;
+
+ ///
+ /// Used to signal that we are ready to complete stop.
+ ///
+ private ManualResetEvent m_finishedProcessingAfterStop = new ManualResetEvent(false);
+
+ public HGIncomingSceneObjectEngine(string name)
+ {
+ Name = name;
+ RequestProcessTimeoutOnStop = 5000;
+
+// MainConsole.Instance.Commands.AddCommand(
+// "Debug",
+// false,
+// "debug jobengine",
+// "debug jobengine ",
+// "Start, stop or get status of the job engine.",
+// "If stopped then all jobs are processed immediately.",
+// HandleControlCommand);
+ }
+
+ public void Start()
+ {
+ lock (this)
+ {
+ if (IsRunning)
+ return;
+
+ IsRunning = true;
+
+ m_finishedProcessingAfterStop.Reset();
+
+ m_requestQueue = new BlockingCollection(new ConcurrentQueue(), 5000);
+
+ m_requestsWaitingStat =
+ new Stat(
+ "HGIncomingAttachmentsWaiting",
+ "Number of incoming attachments waiting for processing.",
+ "",
+ "",
+ "entitytransfer",
+ Name,
+ StatType.Pull,
+ MeasuresOfInterest.None,
+ stat => stat.Value = m_requestQueue.Count,
+ StatVerbosity.Debug);
+
+ StatsManager.RegisterStat(m_requestsWaitingStat);
+
+ Watchdog.StartThread(
+ ProcessRequests,
+ "HG Incoming Scene Object Engine Thread",
+ ThreadPriority.Normal,
+ false,
+ true,
+ null,
+ int.MaxValue);
+ }
+ }
+
+ public void Stop()
+ {
+ lock (this)
+ {
+ try
+ {
+ if (!IsRunning)
+ return;
+
+ IsRunning = false;
+
+ int requestsLeft = m_requestQueue.Count;
+
+ if (requestsLeft <= 0)
+ {
+ m_cancelSource.Cancel();
+ }
+ else
+ {
+ m_log.InfoFormat("[HG INCOMING SCENE OBJECT ENGINE]: Waiting to write {0} events after stop.", requestsLeft);
+
+ while (requestsLeft > 0)
+ {
+ if (!m_finishedProcessingAfterStop.WaitOne(RequestProcessTimeoutOnStop))
+ {
+ // After timeout no events have been written
+ if (requestsLeft == m_requestQueue.Count)
+ {
+ m_log.WarnFormat(
+ "[HG INCOMING SCENE OBJECT ENGINE]: No requests processed after {0} ms wait. Discarding remaining {1} requests",
+ RequestProcessTimeoutOnStop, requestsLeft);
+
+ break;
+ }
+ }
+
+ requestsLeft = m_requestQueue.Count;
+ }
+ }
+ }
+ finally
+ {
+ m_cancelSource.Dispose();
+ StatsManager.DeregisterStat(m_requestsWaitingStat);
+ m_requestsWaitingStat = null;
+ m_requestQueue = null;
+ }
+ }
+ }
+
+ public bool QueueRequest(string name, WaitCallback req, object o)
+ {
+ if (LogLevel >= 1)
+ m_log.DebugFormat("[HG INCOMING SCENE OBJECT ENGINE]: Queued job {0}", name);
+
+ if (m_requestQueue.Count < m_requestQueue.BoundedCapacity)
+ {
+ // m_log.DebugFormat(
+ // "[OUTGOING QUEUE REFILL ENGINE]: Adding request for categories {0} for {1} in {2}",
+ // categories, client.AgentID, m_udpServer.Scene.Name);
+
+ m_requestQueue.Add(new Job(name, req, o));
+
+ if (!m_warnOverMaxQueue)
+ m_warnOverMaxQueue = true;
+
+ return true;
+ }
+ else
+ {
+ if (m_warnOverMaxQueue)
+ {
+ // m_log.WarnFormat(
+ // "[JOB ENGINE]: Request queue at maximum capacity, not recording request from {0} in {1}",
+ // client.AgentID, m_udpServer.Scene.Name);
+
+ m_log.WarnFormat("[HG INCOMING SCENE OBJECT ENGINE]: Request queue at maximum capacity, not recording job");
+
+ m_warnOverMaxQueue = false;
+ }
+
+ return false;
+ }
+ }
+
+ private void ProcessRequests()
+ {
+ try
+ {
+ while (IsRunning || m_requestQueue.Count > 0)
+ {
+ m_currentJob = m_requestQueue.Take(m_cancelSource.Token);
+
+ // QueueEmpty callback = req.Client.OnQueueEmpty;
+ //
+ // if (callback != null)
+ // {
+ // try
+ // {
+ // callback(req.Categories);
+ // }
+ // catch (Exception e)
+ // {
+ // m_log.Error("[OUTGOING QUEUE REFILL ENGINE]: ProcessRequests(" + req.Categories + ") threw an exception: " + e.Message, e);
+ // }
+ // }
+
+ if (LogLevel >= 1)
+ m_log.DebugFormat("[HG INCOMING SCENE OBJECT ENGINE]: Processing job {0}", m_currentJob.Name);
+
+ try
+ {
+ m_currentJob.Callback.Invoke(m_currentJob.O);
+ }
+ catch (Exception e)
+ {
+ m_log.Error(
+ string.Format(
+ "[HG INCOMING SCENE OBJECT ENGINE]: Job {0} failed, continuing. Exception ", m_currentJob.Name), e);
+ }
+
+ if (LogLevel >= 1)
+ m_log.DebugFormat("[HG INCOMING SCENE OBJECT ENGINE]: Processed job {0}", m_currentJob.Name);
+
+ m_currentJob = null;
+ }
+ }
+ catch (OperationCanceledException)
+ {
+ }
+
+ m_finishedProcessingAfterStop.Set();
+ }
+
+// private void HandleControlCommand(string module, string[] args)
+// {
+// // if (SceneManager.Instance.CurrentScene != null && SceneManager.Instance.CurrentScene != m_udpServer.Scene)
+// // return;
+//
+// if (args.Length < 3)
+// {
+// MainConsole.Instance.Output("Usage: debug jobengine ");
+// return;
+// }
+//
+// string subCommand = args[2];
+//
+// if (subCommand == "stop")
+// {
+// Stop();
+// MainConsole.Instance.OutputFormat("Stopped job engine.");
+// }
+// else if (subCommand == "start")
+// {
+// Start();
+// MainConsole.Instance.OutputFormat("Started job engine.");
+// }
+// else if (subCommand == "status")
+// {
+// MainConsole.Instance.OutputFormat("Job engine running: {0}", IsRunning);
+// MainConsole.Instance.OutputFormat("Current job {0}", m_currentJob != null ? m_currentJob.Name : "none");
+// MainConsole.Instance.OutputFormat(
+// "Jobs waiting: {0}", IsRunning ? m_requestQueue.Count.ToString() : "n/a");
+// MainConsole.Instance.OutputFormat("Log Level: {0}", LogLevel);
+// }
+//
+// else if (subCommand == "loglevel")
+// {
+// // int logLevel;
+// int logLevel = int.Parse(args[3]);
+// // if (ConsoleUtil.TryParseConsoleInt(MainConsole.Instance, args[4], out logLevel))
+// // {
+// LogLevel = logLevel;
+// MainConsole.Instance.OutputFormat("Set log level to {0}", LogLevel);
+// // }
+// }
+// else
+// {
+// MainConsole.Instance.OutputFormat("Unrecognized job engine subcommand {0}", subCommand);
+// }
+// }
+ }
+}