* refactor: move asynchronous scene object deletion to inventory queueing out to a separate class

1 files changed, 146 insertions, 0 deletions

diff --git a/OpenSim/Region/Environment/Scenes/AsyncSceneObjectGroupDeleter.cs b/OpenSim/Region/Environment/Scenes/AsyncSceneObjectGroupDeleter.cs
new file mode 100644
index 0000000..8c43bcb
--- /dev/null
+++ b/OpenSim/Region/Environment/Scenes/AsyncSceneObjectGroupDeleter.cs
@@ -0,0 +1,146 @@
+/*
+ * 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 OpenSim 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.Generic;
+using System.Reflection;
+using System.Timers;
+using log4net;
+using OpenMetaverse;
+using OpenMetaverse.Packets;
+using OpenSim.Framework;
+
+namespace OpenSim.Region.Environment.Scenes
+{        
+    class DeleteToInventoryHolder
+    {
+        public DeRezObjectPacket DeRezPacket;
+        public EntityBase selectedEnt;
+        public IClientAPI remoteClient;
+        public SceneObjectGroup objectGroup;
+        public UUID folderID;
+        public bool permissionToDelete;
+    }
+    
+    /// <summary>
+    /// Asynchronously derez objects.  This is used to derez large number of objects to inventory without holding 
+    /// up the main client thread.
+    /// </summary>
+    public class AsyncSceneObjectGroupDeleter
+    {   
+        private static readonly ILog m_log
+            = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+        
+        private Timer m_inventoryTicker;        
+        private readonly Queue<DeleteToInventoryHolder> m_inventoryDeletes = new Queue<DeleteToInventoryHolder>();        
+        private Scene m_scene;
+        
+        public AsyncSceneObjectGroupDeleter(Scene scene)
+        {
+            m_scene = scene;
+        }
+
+        /// <summary>
+        /// Delete the given object from the scene
+        /// </summary>
+        public void DeleteToInventory(
+            DeRezObjectPacket DeRezPacket, UUID folderID, SceneObjectGroup objectGroup, IClientAPI remoteClient, 
+            EntityBase selectedEnt, bool permissionToDelete)
+        {
+            if (m_inventoryTicker != null)
+            {
+                m_inventoryTicker.Stop();
+            }
+            else
+            {
+                m_inventoryTicker = new Timer(2000);
+                m_inventoryTicker.AutoReset = false;
+                m_inventoryTicker.Elapsed += InventoryRunDeleteTimer;
+            }
+
+            lock (m_inventoryDeletes)
+            {
+                DeleteToInventoryHolder dtis = new DeleteToInventoryHolder();
+                dtis.DeRezPacket = DeRezPacket;
+                dtis.folderID = folderID;
+                dtis.objectGroup = objectGroup;
+                dtis.remoteClient = remoteClient;
+                dtis.selectedEnt = selectedEnt;
+                dtis.permissionToDelete = permissionToDelete;
+
+                m_inventoryDeletes.Enqueue(dtis);
+            }
+
+            m_inventoryTicker.Start();
+        
+            // Visually remove it, even if it isnt really gone yet.
+            if (permissionToDelete)
+                objectGroup.FakeDeleteGroup();
+        }
+        
+        private void InventoryRunDeleteTimer(object sender, ElapsedEventArgs e)
+        {
+            m_log.Info("Starting inventory send loop");
+            while (InventoryDeQueueAndDelete() == true)
+            {
+                m_log.Info("Returned item successfully, continuing...");
+            }
+        }            
+
+        private bool InventoryDeQueueAndDelete()
+        {
+            DeleteToInventoryHolder x = null;
+
+            try
+            {
+                lock (m_inventoryDeletes)
+                {
+                    int left = m_inventoryDeletes.Count;
+                    if (left > 0)
+                    {
+                        m_log.InfoFormat("Sending deleted object to user's inventory, {0} item(s) remaining.", left);
+                        x = m_inventoryDeletes.Dequeue();
+                        m_scene.DeleteToInventory(
+                            x.DeRezPacket, x.selectedEnt, x.remoteClient, x.objectGroup, x.folderID, x.permissionToDelete);
+                        return true;
+                    }
+                }
+            }
+            catch(Exception e)
+            {
+                // We can't put the object group details in here since the root part may have disappeared (which is where these sit).
+                // FIXME: This needs to be fixed.
+                m_log.ErrorFormat(
+                    "[AGENT INVENTORY]: Queued deletion of scene object to agent {0} {1} failed: {2}",
+                    (x != null ? x.remoteClient.Name : "unavailable"), (x != null ? x.remoteClient.AgentId.ToString() : "unavailable"), e.ToString());
+            }
+
+            m_log.Info("No objects left in inventory delete queue.");
+            return false;
+        }        
+    }
+}