From 3ce909528dd42cd2c92d8ac6590135bb1962aee4 Mon Sep 17 00:00:00 2001
From: UbitUmarov
Date: Sun, 25 Jun 2017 15:42:36 +0100
Subject: change Backup calls overlap control code

---
 OpenSim/Region/Framework/Scenes/Scene.cs | 73 ++++++++++++++++++++------------
 1 file changed, 46 insertions(+), 27 deletions(-)

(limited to 'OpenSim/Region/Framework')

diff --git a/OpenSim/Region/Framework/Scenes/Scene.cs b/OpenSim/Region/Framework/Scenes/Scene.cs
index ebef158..09b209e 100755
--- a/OpenSim/Region/Framework/Scenes/Scene.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.cs
@@ -1942,7 +1942,6 @@ namespace OpenSim.Region.Framework.Scenes
         {
             if (!m_backingup)
             {
-                m_backingup = true;
                 WorkManager.RunInThreadPool(o => Backup(false), null, string.Format("BackupWorker ({0})", Name));
             }
         }
@@ -1971,38 +1970,58 @@ namespace OpenSim.Region.Framework.Scenes
         {
             lock (m_returns)
             {
-                EventManager.TriggerOnBackup(SimulationDataService, forced);
+                if(m_backingup)
+                {
+                    m_log.WarnFormat("[Scene] Backup of {0} already running. New call skipped", RegionInfo.RegionName);
+                    return;
+                }
 
-                foreach (KeyValuePair<UUID, ReturnInfo> ret in m_returns)
+                m_backingup = true;
+                try
                 {
-                    UUID transaction = UUID.Random();
-
-                    GridInstantMessage msg = new GridInstantMessage();
-                    msg.fromAgentID = new Guid(UUID.Zero.ToString()); // From server
-                    msg.toAgentID = new Guid(ret.Key.ToString());
-                    msg.imSessionID = new Guid(transaction.ToString());
-                    msg.timestamp = (uint)Util.UnixTimeSinceEpoch();
-                    msg.fromAgentName = "Server";
-                    msg.dialog = (byte)19; // Object msg
-                    msg.fromGroup = false;
-                    msg.offline = (byte)1;
-                    msg.ParentEstateID = RegionInfo.EstateSettings.ParentEstateID;
-                    msg.Position = Vector3.Zero;
-                    msg.RegionID = RegionInfo.RegionID.Guid;
-
-                    // We must fill in a null-terminated 'empty' string here since bytes[0] will crash viewer 3.
-                    msg.binaryBucket = Util.StringToBytes256("\0");
-                    if (ret.Value.count > 1)
-                        msg.message = string.Format("Your {0} objects were returned from {1} in region {2} due to {3}", ret.Value.count, ret.Value.location.ToString(), RegionInfo.RegionName, ret.Value.reason);
-                    else
-                        msg.message = string.Format("Your object {0} was returned from {1} in region {2} due to {3}", ret.Value.objectName, ret.Value.location.ToString(), RegionInfo.RegionName, ret.Value.reason);
+                    EventManager.TriggerOnBackup(SimulationDataService, forced);
+
+                    if(m_returns.Count == 0)
+                        return;
 
                     IMessageTransferModule tr = RequestModuleInterface<IMessageTransferModule>();
-                    if (tr != null)
+                    if (tr == null)
+                        return;
+
+                    uint unixtime = (uint)Util.UnixTimeSinceEpoch();
+                    uint estateid =  RegionInfo.EstateSettings.ParentEstateID;
+                    Guid regionguid = RegionInfo.RegionID.Guid;
+ 
+                    foreach (KeyValuePair<UUID, ReturnInfo> ret in m_returns)
+                    {
+                        GridInstantMessage msg = new GridInstantMessage();
+                        msg.fromAgentID = Guid.Empty; // From server
+                        msg.toAgentID = ret.Key.Guid;
+                        msg.imSessionID = Guid.NewGuid();
+                        msg.timestamp = unixtime;
+                        msg.fromAgentName = "Server";
+                        msg.dialog = 19; // Object msg
+                        msg.fromGroup = false;
+                        msg.offline = 1;
+                        msg.ParentEstateID = estateid;
+                        msg.Position = Vector3.Zero;
+                        msg.RegionID = regionguid;
+
+                        // We must fill in a null-terminated 'empty' string here since bytes[0] will crash viewer 3.
+                        msg.binaryBucket = new Byte[1] {0};
+                        if (ret.Value.count > 1)
+                            msg.message = string.Format("Your {0} objects were returned from {1} in region {2} due to {3}", ret.Value.count, ret.Value.location.ToString(), RegionInfo.RegionName, ret.Value.reason);
+                        else
+                            msg.message = string.Format("Your object {0} was returned from {1} in region {2} due to {3}", ret.Value.objectName, ret.Value.location.ToString(), RegionInfo.RegionName, ret.Value.reason);
+
                         tr.SendInstantMessage(msg, delegate(bool success) { });
+                    }
+                    m_returns.Clear();
+                }
+                finally
+                {
+                    m_backingup = false;
                 }
-                m_returns.Clear();
-                m_backingup = false;
             }
         }
 
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