Make negative asset caching actually work

Also fixes some merge artefacts in HGAssetBroker where cached assets
were requested but not actually used and completely squelch a materials
debug message because there is nothing the user can do to fix it anyway.

8 files changed, 96 insertions, 31 deletions

diff --git a/OpenSim/Region/CoreModules/Agent/TextureSender/J2KDecoderModule.cs b/OpenSim/Region/CoreModules/Agent/TextureSender/J2KDecoderModule.cs
index 2242e42..594b6bb 100644
--- a/OpenSim/Region/CoreModules/Agent/TextureSender/J2KDecoderModule.cs
+++ b/OpenSim/Region/CoreModules/Agent/TextureSender/J2KDecoderModule.cs
@@ -369,7 +369,8 @@ namespace OpenSim.Region.CoreModules.Agent.TextureSender
             else if (Cache != null)
             {
                 string assetName = "j2kCache_" + AssetId.ToString();
-                AssetBase layerDecodeAsset = Cache.Get(assetName);
+                bool negative;
+                AssetBase layerDecodeAsset = Cache.Get(assetName, out negative);
 
                 if (layerDecodeAsset != null)
                 {
diff --git a/OpenSim/Region/CoreModules/Asset/CenomeAssetCache.cs b/OpenSim/Region/CoreModules/Asset/CenomeAssetCache.cs
index 23c1f03..136134f 100644
--- a/OpenSim/Region/CoreModules/Asset/CenomeAssetCache.cs
+++ b/OpenSim/Region/CoreModules/Asset/CenomeAssetCache.cs
@@ -260,8 +260,10 @@ namespace OpenSim.Region.CoreModules.Asset
         /// Cache doesn't guarantee in any situation that asset is stored to it.
         /// </para>
         /// </remarks>
-        public AssetBase Get(string id)
+        public AssetBase Get(string id, out bool negative)
         {
+            negative = false;
+
             m_getCount++;
             AssetBase assetBase;
             if (m_cache.TryGetValue(id, out assetBase))
diff --git a/OpenSim/Region/CoreModules/Asset/CoreAssetCache.cs b/OpenSim/Region/CoreModules/Asset/CoreAssetCache.cs
index 51fc3d1..d655509 100644
--- a/OpenSim/Region/CoreModules/Asset/CoreAssetCache.cs
+++ b/OpenSim/Region/CoreModules/Asset/CoreAssetCache.cs
@@ -115,7 +115,8 @@ namespace OpenSim.Region.CoreModules.Asset
         public bool Check(string id)
         {
             // XXX This is probably not an efficient implementation.
-            return Get(id) != null;
+            bool negative;
+            return Get(id, out negative) != null;
         }
 
         public void Cache(AssetBase asset)
@@ -129,8 +130,9 @@ namespace OpenSim.Region.CoreModules.Asset
             // We don't do negative caching
         }
 
-        public AssetBase Get(string id)
+        public AssetBase Get(string id, out bool negative)
         {
+            negative = false;
             return (AssetBase)m_Cache.Get(id);
         }
 
diff --git a/OpenSim/Region/CoreModules/Asset/FlotsamAssetCache.cs b/OpenSim/Region/CoreModules/Asset/FlotsamAssetCache.cs
index 187f090..b183a75 100644
--- a/OpenSim/Region/CoreModules/Asset/FlotsamAssetCache.cs
+++ b/OpenSim/Region/CoreModules/Asset/FlotsamAssetCache.cs
@@ -474,6 +474,8 @@ namespace OpenSim.Region.CoreModules.Asset
                 {
                     using (FileStream stream = File.Open(filename, FileMode.Open, FileAccess.Read, FileShare.Read))
                     {
+                        if (stream.Length == 0) // Empty file will trigger exception below
+                            return null;
                         BinaryFormatter bformatter = new BinaryFormatter();
 
                         asset = (AssetBase)bformatter.Deserialize(stream);
@@ -531,13 +533,25 @@ namespace OpenSim.Region.CoreModules.Asset
             return found;
         }
 
+        // For IAssetService
         public AssetBase Get(string id)
         {
+            bool negative;
+            return Get(id, out negative);
+        }
+
+        public AssetBase Get(string id, out bool negative)
+        {
+            negative = false;
+
             m_Requests++;
 
             object dummy;
             if (m_negativeCache.TryGetValue(id, out dummy))
+            {
+                negative = true;
                 return null;
+            }
 
             AssetBase asset = null;
             asset = GetFromWeakReference(id);
@@ -578,12 +592,6 @@ namespace OpenSim.Region.CoreModules.Asset
                 GenerateCacheHitReport().ForEach(l => m_log.InfoFormat("[FLOTSAM ASSET CACHE]: {0}", l));
             }
 
-            if(asset == null)
-            {
-
-
-            }
-
             return asset;
         }
 
@@ -599,7 +607,8 @@ namespace OpenSim.Region.CoreModules.Asset
 
         public AssetBase GetCached(string id)
         {
-            return Get(id);
+            bool negative;
+            return Get(id, out negative);
         }
 
         public void Expire(string id)
@@ -1227,19 +1236,24 @@ namespace OpenSim.Region.CoreModules.Asset
 
         public AssetMetadata GetMetadata(string id)
         {
-            AssetBase asset = Get(id);
+            bool negative;
+            AssetBase asset = Get(id, out negative);
             return asset.Metadata;
         }
 
         public byte[] GetData(string id)
         {
-            AssetBase asset = Get(id);
+            bool negative;
+            AssetBase asset = Get(id, out negative);
             return asset.Data;
         }
 
         public bool Get(string id, object sender, AssetRetrieved handler)
         {
-            AssetBase asset = Get(id);
+            bool negative;
+            AssetBase asset = Get(id, out negative);
+            if (negative)
+                return false;
             handler(id, sender, asset);
             return true;
         }
@@ -1270,7 +1284,8 @@ namespace OpenSim.Region.CoreModules.Asset
 
         public bool UpdateContent(string id, byte[] data)
         {
-            AssetBase asset = Get(id);
+            bool negative;
+            AssetBase asset = Get(id, out negative);
             asset.Data = data;
             Cache(asset);
             return true;
diff --git a/OpenSim/Region/CoreModules/Asset/GlynnTuckerAssetCache.cs b/OpenSim/Region/CoreModules/Asset/GlynnTuckerAssetCache.cs
index 208963d..342d4d9 100644
--- a/OpenSim/Region/CoreModules/Asset/GlynnTuckerAssetCache.cs
+++ b/OpenSim/Region/CoreModules/Asset/GlynnTuckerAssetCache.cs
@@ -131,8 +131,10 @@ namespace OpenSim.Region.CoreModules.Asset
             // We don't do negative caching
         }
 
-        public AssetBase Get(string id)
+        public AssetBase Get(string id, out bool negative)
         {
+            negative = false;
+
             Object asset = null;
             m_Cache.TryGet(id, out asset);
 
diff --git a/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs b/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs
index fb408a4..3e47782 100644
--- a/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs
+++ b/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs
@@ -299,7 +299,8 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
                 if (bakedTextureFace == null)
                     continue;
 
-                AssetBase asset = cache.Get(bakedTextureFace.TextureID.ToString());
+                bool negative;
+                AssetBase asset = cache.Get(bakedTextureFace.TextureID.ToString(), out negative);
 
                 if (asset != null && asset.Local)
                 {
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/HGAssetBroker.cs b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/HGAssetBroker.cs
index f5aa971..ce61ff0 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/HGAssetBroker.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/HGAssetBroker.cs
@@ -209,7 +209,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
 
             if (m_Cache != null)
             {
-                asset = m_Cache.Get(id);
+                bool negative;
+                asset = m_Cache.Get(id, out negative);
+
+                if (negative)
+                    return null;
 
                 if (asset != null)
                     return asset;
@@ -238,8 +242,9 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
 
         public AssetBase GetCached(string id)
         {
+            bool negative;
             if (m_Cache != null)
-                return m_Cache.Get(id);
+                return m_Cache.Get(id, out negative);
 
             return null;
         }
@@ -250,8 +255,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
 
             if (m_Cache != null)
             {
-                if (m_Cache != null)
-                    m_Cache.Get(id);
+                bool negative;
+                asset = m_Cache.Get(id, out negative);
+
+                if (negative)
+                    return null;
 
                 if (asset != null)
                     return asset.Metadata;
@@ -273,8 +281,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
 
             if (m_Cache != null)
             {
-                if (m_Cache != null)
-                    m_Cache.Get(id);
+                bool negative;
+                asset = m_Cache.Get(id, out negative);
+
+                if (negative)
+                    return null;
 
                 if (asset != null)
                     return asset.Data;
@@ -292,7 +303,13 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
             AssetBase asset = null;
 
             if (m_Cache != null)
-                asset = m_Cache.Get(id);
+            {
+                bool negative;
+                asset = m_Cache.Get(id, out negative);
+
+                if (negative)
+                    return false;
+            }
 
             if (asset != null)
             {
@@ -381,8 +398,9 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
         {
             AssetBase asset = null;
 
+            bool negative;
             if (m_Cache != null)
-                asset = m_Cache.Get(id);
+                asset = m_Cache.Get(id, out negative);
 
             if (asset != null)
             {
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/LocalAssetServiceConnector.cs b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/LocalAssetServiceConnector.cs
index 7190aa0..bbaed21 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/LocalAssetServiceConnector.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/LocalAssetServiceConnector.cs
@@ -158,7 +158,13 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
 
             AssetBase asset = null;
             if (m_Cache != null)
-                asset = m_Cache.Get(id);
+            {
+                bool negative;
+                asset = m_Cache.Get(id, out negative);
+
+                if (negative)
+                    return null;
+            }
 
             if (asset == null)
             {
@@ -178,7 +184,10 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
 //            m_log.DebugFormat("[LOCAL ASSET SERVICES CONNECTOR]: Cache request for {0}", id);
 
             if (m_Cache != null)
-                return m_Cache.Get(id);
+            {
+                bool negative;
+                return m_Cache.Get(id, out negative);
+            }
 
             return null;
         }
@@ -187,7 +196,12 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
         {
             AssetBase asset = null;
             if (m_Cache != null)
-                asset = m_Cache.Get(id);
+            {
+                bool negative;
+                asset = m_Cache.Get(id, out negative);
+                if (negative)
+                    return null;
+            }
 
             if (asset != null)
                 return asset.Metadata;
@@ -210,7 +224,12 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
             AssetBase asset = null;
 
             if (m_Cache != null)
-                asset = m_Cache.Get(id);
+            {
+                bool negative;
+                asset = m_Cache.Get(id, out negative);
+                if (negative)
+                    return null;
+            }
 
             if (asset != null)
                 return asset.Data;
@@ -232,7 +251,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
 
             if (m_Cache != null)
             {
-                AssetBase asset = m_Cache.Get(id);
+                bool negative;
+                AssetBase asset = m_Cache.Get(id, out negative);
+
+                if (negative)
+                    return false;
 
                 if (asset != null)
                 {
@@ -286,8 +309,9 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
         public bool UpdateContent(string id, byte[] data)
         {
             AssetBase asset = null;
+            bool negative;
             if (m_Cache != null)
-                m_Cache.Get(id);
+                m_Cache.Get(id, out negative);
             if (asset != null)
             {
                 asset.Data = data;