Add funtions in RegionSyncModule and (Actor)SyncModules to correctly process SyncStop.

E.g. script engine will save script states and delete objects in local scene copy;
ScenePersistence still maintains object copies, though.

OpenSim/Region/CoreModules/RegionSync/RegionSyncModule/SymmetricSync/RegionSyncModule.cs

@@ -556,6 +556,12 @@ namespace OpenSim.Region.CoreModules.RegionSync.RegionSyncModule
                 //Shutdown all sync connectors
                 StopAllSyncConnectors();
             }
+
+            //Trigger SyncStop event, ActorSyncModules can then take actor specific action if needed.
+            //For instance, script engine will save script states
+            //save script state and stop script instances
+            m_scene.EventManager.TriggerOnSymmetricSyncStop();
+            
         }
 
         private void SyncStatus(Object[] args)
@@ -854,6 +860,8 @@ namespace OpenSim.Region.CoreModules.RegionSync.RegionSyncModule
         /// <param name="sog"></param>
         private void RegionSyncModule_OnObjectBeingRemovedFromScene(SceneObjectGroup sog)
         {
+            //m_log.DebugFormat("RegionSyncModule_OnObjectBeingRemovedFromScene called at time {0}:{1}:{2}", DateTime.Now.Minute, DateTime.Now.Second, DateTime.Now.Millisecond);
+
             //Only send the message out if this is a relay node for sync messages, or this actor caused deleting the object
             if (m_isSyncRelay || CheckObjectForSendingUpdate(sog))
             {

OpenSim/Region/CoreModules/RegionSync/RegionSyncModule/SymmetricSync/ScriptEngineSyncModule.cs

@@ -84,6 +84,7 @@ namespace OpenSim.Region.CoreModules.RegionSync.RegionSyncModule
 
             //Register for Scene/SceneGraph events
             m_scene.SceneGraph.OnObjectCreate += new ObjectCreateDelegate(ScriptEngine_OnObjectCreate);
+            m_scene.EventManager.OnSymmetricSyncStop += ScriptEngine_OnSymmetricSyncStop;
         }
 
         //Called after AddRegion() has been called for all region modules of the scene.
@@ -167,6 +168,14 @@ namespace OpenSim.Region.CoreModules.RegionSync.RegionSyncModule
             }
         }
 
+        public void ScriptEngine_OnSymmetricSyncStop()
+        {
+            //Inform script engine to save script states and stop scripts
+            m_scene.EventManager.TriggerScriptEngineSyncStop();
+            //remove all objects
+            m_scene.DeleteAllSceneObjects();
+        }
+
         #endregion //ScriptEngineSyncModule
 
     }

OpenSim/Region/Framework/Scenes/EventManager.cs

@@ -2183,7 +2183,7 @@ namespace OpenSim.Region.Framework.Scenes
                     catch (Exception e)
                     {
                         m_log.ErrorFormat(
-                            "[EVENT MANAGER]: Delegate for TriggerOnSceneObjectLoaded failed - continuing.  {0} {1}", 
+                            "[EVENT MANAGER]: Delegate for TriggerScriptEngineSyncStop failed - continuing.  {0} {1}", 
                             e.Message, e.StackTrace);
                     }
                 }
@@ -2267,6 +2267,30 @@ namespace OpenSim.Region.Framework.Scenes
                 }
             }
         }
+
+        public delegate void SymmetricSyncStop();
+        public event SymmetricSyncStop OnSymmetricSyncStop;
+        public void TriggerOnSymmetricSyncStop()
+        {
+            SymmetricSyncStop handlerSymmetricSyncStop = OnSymmetricSyncStop;
+            if (handlerSymmetricSyncStop != null)
+            {
+                foreach (SymmetricSyncStop d in handlerSymmetricSyncStop.GetInvocationList())
+                {
+                    try
+                    {
+                        d();
+                    }
+                    catch (Exception e)
+                    {
+                        m_log.ErrorFormat(
+                            "[EVENT MANAGER]: Delegate for TriggerOnSymmetricSyncStop failed - continuing.  {0} {1}",
+                            e.Message, e.StackTrace);
+                    }
+                }
+            }
+        }
+
         //end of SYMMETRIC SYNC
     }
 }