From 1bf05a543c1328c31b7b107a3335f34e8d174ed8 Mon Sep 17 00:00:00 2001
From: Justin Clarke Casey
Date: Mon, 9 Mar 2009 18:35:26 +0000
Subject: * Move method documentation from AssetCache up to IAssetCache * No
 functional changes

---
 OpenSim/Framework/IAssetCache.cs | 71 +++++++++++++++++++++++++++++++++++++---
 1 file changed, 66 insertions(+), 5 deletions(-)

(limited to 'OpenSim/Framework/IAssetCache.cs')

diff --git a/OpenSim/Framework/IAssetCache.cs b/OpenSim/Framework/IAssetCache.cs
index 22f5755..8a184bb 100644
--- a/OpenSim/Framework/IAssetCache.cs
+++ b/OpenSim/Framework/IAssetCache.cs
@@ -30,25 +30,86 @@ using OpenMetaverse.Packets;
 
 namespace OpenSim.Framework
 {
-
     public delegate void AssetRequestCallback(UUID assetId, AssetBase asset);
 
+    /// <summary>
+    /// Interface to the local asset cache.  This is the mechanism through which assets can be added and requested.
+    /// </summary>    
     public interface IAssetCache : IAssetReceiver, IPlugin
     {
-
+        /// <value>
+        /// The 'server' from which assets can be requested and to which assets are persisted.
+        /// </value>        
         IAssetServer AssetServer { get; }
+        
+        void Initialise(ConfigSettings cs, IAssetServer server);        
 
+        /// <summary>
+        /// Report statistical data to the log.
+        /// </summary>        
         void ShowState();
+        
+        /// <summary>
+        /// Clear the asset cache.
+        /// </summary>        
         void Clear();
+        
+        /// <summary>
+        /// Get an asset only if it's already in the cache.
+        /// </summary>
+        /// <param name="assetId"></param>
+        /// <param name="asset"></param>
+        /// <returns>true if the asset was in the cache, false if it was not</returns>        
         bool TryGetCachedAsset(UUID assetID, out AssetBase asset);
+        
+        /// <summary>
+        /// Asynchronously retrieve an asset.
+        /// </summary>
+        /// <param name="assetId"></param>
+        /// <param name="callback">
+        /// <param name="isTexture"></param>
+        /// A callback invoked when the asset has either been found or not found.
+        /// If the asset was found this is called with the asset UUID and the asset data
+        /// If the asset was not found this is still called with the asset UUID but with a null asset data reference</param>        
         void GetAsset(UUID assetID, AssetRequestCallback callback, bool isTexture);
+        
+        /// <summary>
+        /// Synchronously retreive an asset.  If the asset isn't in the cache, a request will be made to the persistent store to
+        /// load it into the cache.
+        /// </summary>
+        ///
+        /// XXX We'll keep polling the cache until we get the asset or we exceed
+        /// the allowed number of polls.  This isn't a very good way of doing things since a single thread
+        /// is processing inbound packets, so if the asset server is slow, we could block this for up to
+        /// the timeout period.  Whereever possible we want to use the asynchronous callback GetAsset()
+        ///
+        /// <param name="assetID"></param>
+        /// <param name="isTexture"></param>
+        /// <returns>null if the asset could not be retrieved</returns>        
         AssetBase GetAsset(UUID assetID, bool isTexture);
+        
+        /// <summary>
+        /// Add an asset to both the persistent store and the cache.
+        /// </summary>
+        /// <param name="asset"></param>        
         void AddAsset(AssetBase asset);
+        
+        /// <summary>
+        /// Expire an asset from the cache
+        /// </summary>
+        /// Allows you to clear a specific asset by uuid out
+        /// of the asset cache.  This is needed because the osdynamic
+        /// texture code grows the asset cache without bounds.  The
+        /// real solution here is a much better cache archicture, but
+        /// this is a stop gap measure until we have such a thing.        
         void ExpireAsset(UUID assetID);
+        
+        /// <summary>
+        /// Handle an asset request from the client.  The result will be sent back asynchronously.
+        /// </summary>
+        /// <param name="userInfo"></param>
+        /// <param name="transferRequest"></param>        
         void AddAssetRequest(IClientAPI userInfo, TransferRequestPacket transferRequest);
-
-        void Initialise(ConfigSettings cs, IAssetServer server);
-
     }
 
     public class AssetCachePluginInitialiser : PluginInitialiserBase
-- 
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