CoreAssetCache.cs 4.8 KB

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  1. /*
  2. * Copyright (c) Contributors, http://opensimulator.org/
  3. * See CONTRIBUTORS.TXT for a full list of copyright holders.
  4. *
  5. * Redistribution and use in source and binary forms, with or without
  6. * modification, are permitted provided that the following conditions are met:
  7. * * Redistributions of source code must retain the above copyright
  8. * notice, this list of conditions and the following disclaimer.
  9. * * Redistributions in binary form must reproduce the above copyright
  10. * notice, this list of conditions and the following disclaimer in the
  11. * documentation and/or other materials provided with the distribution.
  12. * * Neither the name of the OpenSimulator Project nor the
  13. * names of its contributors may be used to endorse or promote products
  14. * derived from this software without specific prior written permission.
  15. *
  16. * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
  17. * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  18. * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  19. * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
  20. * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  21. * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  22. * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  23. * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24. * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  25. * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26. */
  27. using log4net;
  28. using System;
  29. using System.IO;
  30. using System.Collections.Generic;
  31. using System.Reflection;
  32. using Mono.Addins;
  33. using Nini.Config;
  34. using OpenSim.Framework;
  35. using OpenSim.Region.Framework.Interfaces;
  36. using OpenSim.Region.Framework.Scenes;
  37. using OpenSim.Services.Interfaces;
  38. namespace OpenSim.Region.CoreModules.Asset
  39. {
  40. [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule", Id = "CoreAssetCache")]
  41. public class CoreAssetCache : ISharedRegionModule, IAssetCache
  42. {
  43. private static readonly ILog m_log =
  44. LogManager.GetLogger(
  45. MethodBase.GetCurrentMethod().DeclaringType);
  46. private bool m_Enabled;
  47. private Cache m_Cache;
  48. public string Name
  49. {
  50. get { return "CoreAssetCache"; }
  51. }
  52. public Type ReplaceableInterface
  53. {
  54. get { return null; }
  55. }
  56. public void Initialise(IConfigSource source)
  57. {
  58. IConfig moduleConfig = source.Configs["Modules"];
  59. if (moduleConfig != null)
  60. {
  61. string name = moduleConfig.GetString("AssetCaching");
  62. //m_log.DebugFormat("[XXX] name = {0} (this module's name: {1}", name, Name);
  63. if (name == Name)
  64. {
  65. IConfig assetConfig = source.Configs["AssetCache"];
  66. if (assetConfig == null)
  67. {
  68. m_log.Error("[ASSET CACHE]: AssetCache missing from OpenSim.ini");
  69. return;
  70. }
  71. m_Cache = new Cache(CacheMedium.Memory, CacheStrategy.Aggressive, CacheFlags.AllowUpdate);
  72. m_Enabled = true;
  73. m_log.Info("[ASSET CACHE]: Core asset cache enabled");
  74. m_Cache.Size = assetConfig.GetInt("CacheBuckets", 32768);
  75. }
  76. }
  77. }
  78. public void PostInitialise()
  79. {
  80. }
  81. public void Close()
  82. {
  83. }
  84. public void AddRegion(Scene scene)
  85. {
  86. if (m_Enabled)
  87. scene.RegisterModuleInterface<IAssetCache>(this);
  88. }
  89. public void RemoveRegion(Scene scene)
  90. {
  91. }
  92. public void RegionLoaded(Scene scene)
  93. {
  94. }
  95. ////////////////////////////////////////////////////////////
  96. // IAssetCache
  97. //
  98. public bool Check(string id)
  99. {
  100. // XXX This is probably not an efficient implementation.
  101. AssetBase asset;
  102. if (!Get(id, out asset))
  103. return false;
  104. return asset != null;
  105. }
  106. public void Cache(AssetBase asset)
  107. {
  108. if (asset != null)
  109. m_Cache.Store(asset.ID, asset);
  110. }
  111. public void CacheNegative(string id)
  112. {
  113. // We don't do negative caching
  114. }
  115. public bool Get(string id, out AssetBase asset)
  116. {
  117. asset = (AssetBase)m_Cache.Get(id);
  118. return true;
  119. }
  120. public void Expire(string id)
  121. {
  122. m_Cache.Invalidate(id);
  123. }
  124. public void Clear()
  125. {
  126. m_Cache.Clear();
  127. }
  128. }
  129. }