Clean up orphaned json stores. This can happen when an object is

removed, when a script is removed, or when a script is reset. Also
added a stats command to track the number of json stores used by
a region. Will probably add some more commands later.

OpenSim/Region/Framework/Interfaces/IJsonStoreModule.cs

@@ -51,10 +51,17 @@ namespace OpenSim.Region.Framework.Interfaces
         UUID = 5
     }
     
+    public struct JsonStoreStats
+    {
+        public int StoreCount;
+    }
+
     public delegate void TakeValueCallback(string s);
 
     public interface IJsonStoreModule
     {
+        JsonStoreStats GetStoreStats();
+
         bool AttachObjectStore(UUID objectID);
         bool CreateStore(string value, ref UUID result);
         bool DestroyStore(UUID storeID);

OpenSim/Region/OptionalModules/Scripting/JsonStore/JsonStoreCommands.cs

@@ -0,0 +1,195 @@
+/*
+ * Copyright (c) Contributors 
+ * 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 Mono.Addins;
+
+using System;
+using System.Reflection;
+using System.Threading;
+using System.Text;
+using System.Net;
+using System.Net.Sockets;
+using log4net;
+using Nini.Config;
+using OpenMetaverse;
+using OpenMetaverse.StructuredData;
+using OpenSim.Framework;
+using OpenSim.Region.Framework.Interfaces;
+using OpenSim.Region.Framework.Scenes;
+using System.Collections.Generic;
+using System.Text.RegularExpressions;
+
+namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
+{
+    [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule", Id = "JsonStoreCommandsModule")]
+
+    public class JsonStoreCommandsModule  : INonSharedRegionModule
+    {
+        private static readonly ILog m_log =
+            LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+        private IConfig m_config = null;
+        private bool m_enabled = false;
+
+        private Scene m_scene = null;
+        //private IJsonStoreModule m_store;
+        private JsonStoreModule m_store;
+
+#region Region Module interface
+
+        // -----------------------------------------------------------------
+        /// <summary>
+        /// Name of this shared module is it's class name
+        /// </summary>
+        // -----------------------------------------------------------------
+        public string Name
+        {
+            get { return this.GetType().Name; }
+        }
+
+        // -----------------------------------------------------------------
+        /// <summary>
+        /// Initialise this shared module
+        /// </summary>
+        /// <param name="scene">this region is getting initialised</param>
+        /// <param name="source">nini config, we are not using this</param>
+        // -----------------------------------------------------------------
+        public void Initialise(IConfigSource config)
+        {
+            try 
+            {
+                if ((m_config = config.Configs["JsonStore"]) == null)
+                {
+                    // There is no configuration, the module is disabled
+                    // m_log.InfoFormat("[JsonStore] no configuration info");
+                    return;
+                }
+
+                m_enabled = m_config.GetBoolean("Enabled", m_enabled);
+            }
+            catch (Exception e)
+            {
+                m_log.Error("[JsonStore]: initialization error: {0}", e);
+                return;
+            }
+
+            if (m_enabled)
+                m_log.DebugFormat("[JsonStore]: module is enabled");
+        }
+
+        // -----------------------------------------------------------------
+        /// <summary>
+        /// everything is loaded, perform post load configuration
+        /// </summary>
+        // -----------------------------------------------------------------
+        public void PostInitialise()
+        {
+        }
+
+        // -----------------------------------------------------------------
+        /// <summary>
+        /// Nothing to do on close
+        /// </summary>
+        // -----------------------------------------------------------------
+        public void Close()
+        {
+        }
+
+        // -----------------------------------------------------------------
+        /// <summary>
+        /// </summary>
+        // -----------------------------------------------------------------
+        public void AddRegion(Scene scene)
+        {
+            if (m_enabled)
+            {
+                m_scene = scene;
+                
+            }
+        }
+
+        // -----------------------------------------------------------------
+        /// <summary>
+        /// </summary>
+        // -----------------------------------------------------------------
+        public void RemoveRegion(Scene scene)
+        {
+            // need to remove all references to the scene in the subscription
+            // list to enable full garbage collection of the scene object
+        }
+
+        // -----------------------------------------------------------------
+        /// <summary>
+        /// Called when all modules have been added for a region. This is 
+        /// where we hook up events
+        /// </summary>
+        // -----------------------------------------------------------------
+        public void RegionLoaded(Scene scene)
+        {
+            if (m_enabled)
+            {
+                m_scene = scene;
+
+                m_store = (JsonStoreModule) m_scene.RequestModuleInterface<IJsonStoreModule>();
+                if (m_store == null)
+                {
+                    m_log.ErrorFormat("[JsonStoreCommands]: JsonModule interface not defined");
+                    m_enabled = false;
+                    return;
+                }
+
+                scene.AddCommand("JsonStore", this, "jsonstore stats", "jsonstore stats",
+                                 "Display statistics about the state of the JsonStore module", "",
+                                 CmdStats);
+            }
+        }
+
+        /// -----------------------------------------------------------------
+        /// <summary>
+        /// </summary>
+        // -----------------------------------------------------------------
+        public Type ReplaceableInterface
+        {
+            get { return null; }
+        }
+
+#endregion
+
+#region Commands
+
+        private void CmdStats(string module, string[] cmd)
+        {
+            if (MainConsole.Instance.ConsoleScene != m_scene && MainConsole.Instance.ConsoleScene != null)
+                return;
+
+            JsonStoreStats stats = m_store.GetStoreStats();
+            MainConsole.Instance.OutputFormat("{0}\t{1}",m_scene.RegionInfo.RegionName,stats.StoreCount);
+        }
+
+#endregion
+
+    }
+}

OpenSim/Region/OptionalModules/Scripting/JsonStore/JsonStoreModule.cs

@@ -42,7 +42,6 @@ using OpenSim.Region.Framework.Scenes;
 using System.Collections.Generic;
 using System.Text.RegularExpressions;
 
-            
 namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
 {
     [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule", Id = "JsonStoreModule")]
@@ -60,6 +59,7 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
         private Scene m_scene = null;
 
         private Dictionary<UUID,JsonStore> m_JsonValueStore;
+
         private UUID m_sharedStore;
 
 #region Region Module interface
@@ -140,6 +140,8 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
                 m_sharedStore = UUID.Zero;
                 m_JsonValueStore = new Dictionary<UUID,JsonStore>();
                 m_JsonValueStore.Add(m_sharedStore,new JsonStore(""));
+
+                scene.EventManager.OnObjectBeingRemovedFromScene += EventManagerOnObjectBeingRemovedFromScene;
             }
         }
 
@@ -149,6 +151,8 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
         // -----------------------------------------------------------------
         public void RemoveRegion(Scene scene)
         {
+            scene.EventManager.OnObjectBeingRemovedFromScene -= EventManagerOnObjectBeingRemovedFromScene;
+
             // need to remove all references to the scene in the subscription
             // list to enable full garbage collection of the scene object
         }
@@ -161,7 +165,9 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
         // -----------------------------------------------------------------
         public void RegionLoaded(Scene scene)
         {
-            if (m_enabled) {}
+            if (m_enabled)
+            {
+            }
         }
 
         /// -----------------------------------------------------------------
@@ -175,8 +181,39 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
 
 #endregion
 
+#region SceneEvents
+        // -----------------------------------------------------------------
+        /// <summary>
+        /// 
+        /// </summary>
+        // -----------------------------------------------------------------
+        public void EventManagerOnObjectBeingRemovedFromScene(SceneObjectGroup obj)
+        {
+            obj.ForEachPart(delegate(SceneObjectPart sop) { DestroyStore(sop.UUID); } );
+        }
+
+#endregion
+
 #region ScriptInvocationInteface
 
+        
+        // -----------------------------------------------------------------
+        /// <summary>
+        /// 
+        /// </summary>
+        // -----------------------------------------------------------------
+        public JsonStoreStats GetStoreStats()
+        {
+            JsonStoreStats stats;
+
+            lock (m_JsonValueStore)
+            {
+                stats.StoreCount = m_JsonValueStore.Count;
+            }
+            
+            return stats;
+        }
+        
         // -----------------------------------------------------------------
         /// <summary>
         /// 

OpenSim/Region/OptionalModules/Scripting/JsonStore/JsonStoreScriptModule.cs

@@ -59,7 +59,9 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
 
         private IScriptModuleComms m_comms;
         private IJsonStoreModule m_store;
-        
+
+        private Dictionary<UUID,HashSet<UUID>> m_scriptStores = new Dictionary<UUID,HashSet<UUID>>();
+
 #region Region Module interface
 
         // -----------------------------------------------------------------
@@ -126,6 +128,8 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
         // -----------------------------------------------------------------
         public void AddRegion(Scene scene)
         {
+            scene.EventManager.OnScriptReset += HandleScriptReset;
+            scene.EventManager.OnRemoveScript += HandleScriptReset;
         }
 
         // -----------------------------------------------------------------
@@ -134,10 +138,32 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
         // -----------------------------------------------------------------
         public void RemoveRegion(Scene scene)
         {
+            scene.EventManager.OnScriptReset -= HandleScriptReset;
+            scene.EventManager.OnRemoveScript -= HandleScriptReset;
+
             // need to remove all references to the scene in the subscription
             // list to enable full garbage collection of the scene object
         }
 
+        // -----------------------------------------------------------------
+        /// <summary>
+        /// </summary>
+        // -----------------------------------------------------------------
+        private void HandleScriptReset(uint localID, UUID itemID)
+        {
+            HashSet<UUID> stores;
+
+            lock (m_scriptStores)
+            {
+                if (! m_scriptStores.TryGetValue(itemID, out stores))
+                    return;
+                m_scriptStores.Remove(itemID);
+            }
+
+            foreach (UUID id in stores)
+                m_store.DestroyStore(id);
+        }
+
         // -----------------------------------------------------------------
         /// <summary>
         /// Called when all modules have been added for a region. This is 
@@ -250,6 +276,13 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
             if (! m_store.CreateStore(value, ref uuid))
                 GenerateRuntimeError("Failed to create Json store");
             
+            lock (m_scriptStores)
+            {
+                if (! m_scriptStores.ContainsKey(scriptID))
+                    m_scriptStores[scriptID] = new HashSet<UUID>();
+                
+                m_scriptStores[scriptID].Add(uuid);
+            }
             return uuid;
         }
 
@@ -261,6 +294,12 @@ namespace OpenSim.Region.OptionalModules.Scripting.JsonStore
         [ScriptInvocation]
         public int JsonDestroyStore(UUID hostID, UUID scriptID, UUID storeID)
         {
+            lock(m_scriptStores)
+            {
+                if (m_scriptStores.ContainsKey(scriptID))
+                    m_scriptStores[scriptID].Remove(storeID);
+            }
+
             return m_store.DestroyStore(storeID) ? 1 : 0;
         }