Make the j2kDecodeCache expire after 50 minutes (configurable). Alse allows

setting the path for it. This commit introduces NEW DEFAULT BEHAVIOR. To
retain the old behavior (eternal cache) you will need to change your OpenSim.ini
and set the timeout to 0.

2 files changed, 31 insertions, 4 deletions

diff --git a/OpenSim/Region/CoreModules/Agent/TextureSender/J2KDecoderModule.cs b/OpenSim/Region/CoreModules/Agent/TextureSender/J2KDecoderModule.cs
index 0d3cc23..00a247c 100644
--- a/OpenSim/Region/CoreModules/Agent/TextureSender/J2KDecoderModule.cs
+++ b/OpenSim/Region/CoreModules/Agent/TextureSender/J2KDecoderModule.cs
@@ -53,8 +53,9 @@ namespace OpenSim.Region.CoreModules.Agent.TextureSender
         /// </summary>
         private readonly Dictionary<UUID, OpenJPEG.J2KLayerInfo[]> m_cacheddecode = new Dictionary<UUID, OpenJPEG.J2KLayerInfo[]>();
         private bool OpenJpegFail = false;
-        private readonly string CacheFolder = Util.dataDir() + "/j2kDecodeCache";
-        private readonly J2KDecodeFileCache fCache;
+        private string CacheFolder = Util.dataDir() + "/j2kDecodeCache";
+        private int CacheTimeout = 60;
+        private J2KDecodeFileCache fCache;
 
         /// <summary>
         /// List of client methods to notify of results of decode
@@ -63,11 +64,19 @@ namespace OpenSim.Region.CoreModules.Agent.TextureSender
 
         public J2KDecoderModule()
         {
-            fCache = new J2KDecodeFileCache(CacheFolder);
         }
 
         public void Initialise(Scene scene, IConfigSource source)
         {
+            IConfig j2kConfig = source.Configs["J2KDecoder"];
+            if (j2kConfig != null)
+            {
+                CacheFolder = j2kConfig.GetString("CacheDir", CacheFolder);
+                CacheTimeout = j2kConfig.GetInt("CacheTimeout", CacheTimeout);
+            }
+
+            fCache = new J2KDecodeFileCache(CacheFolder, CacheTimeout);
+
             scene.RegisterModuleInterface<IJ2KDecoder>(this);
         }
 
@@ -353,6 +362,7 @@ namespace OpenSim.Region.CoreModules.Agent.TextureSender
     public class J2KDecodeFileCache
     {
         private readonly string m_cacheDecodeFolder;
+        private readonly int m_cacheTimeout;
         private bool enabled = true;
         
         private static readonly ILog m_log
@@ -362,9 +372,10 @@ namespace OpenSim.Region.CoreModules.Agent.TextureSender
         /// Creates a new instance of a file cache
         /// </summary>
         /// <param name="pFolder">base folder for the cache.  Will be created if it doesn't exist</param>
-        public J2KDecodeFileCache(string pFolder)
+        public J2KDecodeFileCache(string pFolder, int timeout)
         {
             m_cacheDecodeFolder = pFolder;
+            m_cacheTimeout = timeout;
             if (!Directory.Exists(pFolder))
             {
                 Createj2KCacheFolder(pFolder);
@@ -426,6 +437,15 @@ namespace OpenSim.Region.CoreModules.Agent.TextureSender
                 return false;
             }
 
+            DateTime creationTime = File.GetCreationTime(filename);
+            TimeSpan fileAge = DateTime.Now - creationTime;
+
+            if (m_cacheTimeout != 0 && fileAge >= TimeSpan.FromMinutes(m_cacheTimeout))
+            {
+                File.Delete(filename);
+                return false;
+            }
+
             string readResult = string.Empty;
 
             try
diff --git a/bin/OpenSim.ini.example b/bin/OpenSim.ini.example
index cff5d19..3529599 100644
--- a/bin/OpenSim.ini.example
+++ b/bin/OpenSim.ini.example
@@ -1366,6 +1366,13 @@
     ;
     ;TextureDataLimit = 5
 
+;; The JPEG2000 decode cache
+;; Timeout is in minutes
+
+[J2KDecoder]
+;CacheDir = "./j2kDecodeCache"
+;CacheTimeout = 60
+
 ;;
 ;; These are defaults that are overwritten below in [Architecture].
 ;; These defaults allow OpenSim to work out of the box with