/* * 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 log4net; using System; using System.IO; using System.Collections.Generic; using System.Reflection; using GlynnTucker.Cache; using Mono.Addins; using Nini.Config; using OpenSim.Framework; using OpenSim.Region.Framework.Interfaces; using OpenSim.Region.Framework.Scenes; using OpenSim.Services.Interfaces; namespace OpenSim.Region.CoreModules.Asset { [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule", Id = "GlynnTuckerAssetCache")] public class GlynnTuckerAssetCache : ISharedRegionModule, IImprovedAssetCache { private static readonly ILog m_log = LogManager.GetLogger( MethodBase.GetCurrentMethod().DeclaringType); private bool m_Enabled; private ICache m_Cache; private ulong m_Hits; private ulong m_Requests; // Instrumentation private uint m_DebugRate; public Type ReplaceableInterface { get { return null; } } public string Name { get { return "GlynnTuckerAssetCache"; } } public void Initialise(IConfigSource source) { IConfig moduleConfig = source.Configs["Modules"]; if (moduleConfig != null) { string name = moduleConfig.GetString("AssetCaching"); //m_log.DebugFormat("[ASSET CACHE] name = {0} (this module's name: {1}). Sync? ", name, Name, m_Cache.IsSynchronized); if (name == Name) { m_Cache = new GlynnTucker.Cache.SimpleMemoryCache(); m_Enabled = true; m_log.Info("[ASSET CACHE]: GlynnTucker asset cache enabled"); // Instrumentation IConfig cacheConfig = source.Configs["AssetCache"]; if (cacheConfig != null) m_DebugRate = (uint)cacheConfig.GetInt("DebugRate", 0); } } } public void PostInitialise() { } public void Close() { } public void AddRegion(Scene scene) { if (m_Enabled) scene.RegisterModuleInterface<IImprovedAssetCache>(this); } public void RemoveRegion(Scene scene) { } public void RegionLoaded(Scene scene) { } //////////////////////////////////////////////////////////// // IImprovedAssetCache // public bool Check(string id) { return false; } public void Cache(AssetBase asset) { if (asset != null) m_Cache.AddOrUpdate(asset.ID, asset); } public AssetBase Get(string id) { Object asset = null; m_Cache.TryGet(id, out asset); Debug(asset); return (AssetBase)asset; } public void Expire(string id) { Object asset = null; if (m_Cache.TryGet(id, out asset)) m_Cache.Remove(id); } public void Clear() { m_Cache.Clear(); } private void Debug(Object asset) { // Temporary instrumentation to measure the hit/miss rate if (m_DebugRate > 0) { ++m_Requests; if (asset != null) ++m_Hits; if ((m_Requests % m_DebugRate) == 0) m_log.DebugFormat("[ASSET CACHE]: Hit Rate {0} / {1} == {2}%", m_Hits, m_Requests, ((float)m_Hits / (float)m_Requests) * 100.0f); } // End instrumentation } } }