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- /*
- * 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 Nini.Config;
- using OpenSim.Framework;
- using OpenSim.Region.Framework.Interfaces;
- using OpenSim.Region.Framework.Scenes;
- using OpenSim.Services.Interfaces;
- namespace OpenSim.Region.CoreModules.Asset
- {
- public class GlynnTuckerAssetCache : ISharedRegionModule, IImprovedAssetCache
- {
- private static readonly ILog m_log =
- LogManager.GetLogger(
- MethodBase.GetCurrentMethod().DeclaringType);
- private bool m_Enabled = false;
- private ICache m_Cache = new GlynnTucker.Cache.SimpleMemoryCache();
- // Instrumentation
- private uint m_DebugRate = 0;
- 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_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 void Cache(AssetBase asset)
- {
- if (asset != null)
- m_Cache.AddOrUpdate(asset.ID, asset);
- }
- private ulong m_Hits = 0;
- private ulong m_Requests = 0;
- 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 / m_Requests) * 100);
- }
- // End instrumentation
- }
- 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();
- }
- }
- }
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