opensim – Blame information for rev 1

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1 eva 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  
28 using System;
29 using System.Collections.Generic;
30 using System.IO;
31 using System.Reflection;
32 using Nini.Config;
33 using log4net;
34 using OpenSim.Framework;
35 using OpenSim.Data;
36 using OpenSim.Services.Interfaces;
37 using OpenMetaverse;
38  
39 namespace OpenSim.Services.AssetService
40 {
41 /// <summary>
42 /// A de-duplicating asset service.
43 /// </summary>
44 public class XAssetService : XAssetServiceBase, IAssetService
45 {
46 private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
47  
48 protected static XAssetService m_RootInstance;
49  
50 public XAssetService(IConfigSource config) : this(config, "AssetService") {}
51  
52 public XAssetService(IConfigSource config, string configName) : base(config, configName)
53 {
54 if (m_RootInstance == null)
55 {
56 m_RootInstance = this;
57  
58 if (m_AssetLoader != null)
59 {
60 IConfig assetConfig = config.Configs[configName];
61 if (assetConfig == null)
62 throw new Exception("No AssetService configuration");
63  
64 string loaderArgs = assetConfig.GetString("AssetLoaderArgs", String.Empty);
65  
66 bool assetLoaderEnabled = assetConfig.GetBoolean("AssetLoaderEnabled", true);
67  
68 if (assetLoaderEnabled && !HasChainedAssetService)
69 {
70 m_log.DebugFormat("[XASSET SERVICE]: Loading default asset set from {0}", loaderArgs);
71  
72 m_AssetLoader.ForEachDefaultXmlAsset(
73 loaderArgs,
74 a =>
75 {
76 AssetBase existingAsset = Get(a.ID);
77 // AssetMetadata existingMetadata = GetMetadata(a.ID);
78  
79 if (existingAsset == null || Util.SHA1Hash(existingAsset.Data) != Util.SHA1Hash(a.Data))
80 {
81 // m_log.DebugFormat("[ASSET]: Storing {0} {1}", a.Name, a.ID);
82 Store(a);
83 }
84 });
85 }
86  
87 m_log.Debug("[XASSET SERVICE]: Local asset service enabled");
88 }
89 }
90 }
91  
92 public virtual AssetBase Get(string id)
93 {
94 // m_log.DebugFormat("[ASSET SERVICE]: Get asset for {0}", id);
95  
96 UUID assetID;
97  
98 if (!UUID.TryParse(id, out assetID))
99 {
100 m_log.WarnFormat("[XASSET SERVICE]: Could not parse requested asset id {0}", id);
101 return null;
102 }
103  
104 try
105 {
106 AssetBase asset = m_Database.GetAsset(assetID);
107  
108 if (asset != null)
109 {
110 return asset;
111 }
112 else if (HasChainedAssetService)
113 {
114 asset = m_ChainedAssetService.Get(id);
115  
116 if (asset != null)
117 MigrateFromChainedService(asset);
118  
119 return asset;
120 }
121  
122 return null;
123 }
124 catch (Exception e)
125 {
126 m_log.ErrorFormat("[XASSET SERVICE]: Exception getting asset {0} {1}", assetID, e);
127 return null;
128 }
129 }
130  
131 public virtual AssetBase GetCached(string id)
132 {
133 return Get(id);
134 }
135  
136 public virtual AssetMetadata GetMetadata(string id)
137 {
138 // m_log.DebugFormat("[XASSET SERVICE]: Get asset metadata for {0}", id);
139  
140 AssetBase asset = Get(id);
141  
142 if (asset != null)
143 return asset.Metadata;
144 else
145 return null;
146 }
147  
148 public virtual byte[] GetData(string id)
149 {
150 // m_log.DebugFormat("[XASSET SERVICE]: Get asset data for {0}", id);
151  
152 AssetBase asset = Get(id);
153  
154 if (asset != null)
155 return asset.Data;
156 else
157 return null;
158 }
159  
160 public virtual bool Get(string id, Object sender, AssetRetrieved handler)
161 {
162 //m_log.DebugFormat("[XASSET SERVICE]: Get asset async {0}", id);
163  
164 UUID assetID;
165  
166 if (!UUID.TryParse(id, out assetID))
167 return false;
168  
169 AssetBase asset = Get(id);
170  
171 //m_log.DebugFormat("[XASSET SERVICE]: Got asset {0}", asset);
172  
173 handler(id, sender, asset);
174  
175 return true;
176 }
177  
178 public virtual string Store(AssetBase asset)
179 {
180 if (!m_Database.ExistsAsset(asset.FullID))
181 {
182 // m_log.DebugFormat(
183 // "[XASSET SERVICE]: Storing asset {0} {1}, bytes {2}", asset.Name, asset.FullID, asset.Data.Length);
184 m_Database.StoreAsset(asset);
185 }
186 // else
187 // {
188 // m_log.DebugFormat(
189 // "[XASSET SERVICE]: Not storing asset {0} {1}, bytes {2} as it already exists", asset.Name, asset.FullID, asset.Data.Length);
190 // }
191  
192 return asset.ID;
193 }
194  
195 public bool UpdateContent(string id, byte[] data)
196 {
197 return false;
198 }
199  
200 public virtual bool Delete(string id)
201 {
202 // m_log.DebugFormat("[XASSET SERVICE]: Deleting asset {0}", id);
203  
204 UUID assetID;
205 if (!UUID.TryParse(id, out assetID))
206 return false;
207  
208 if (HasChainedAssetService)
209 m_ChainedAssetService.Delete(id);
210  
211 return m_Database.Delete(id);
212 }
213  
214 private void MigrateFromChainedService(AssetBase asset)
215 {
216 Store(asset);
217 m_ChainedAssetService.Delete(asset.ID);
218 }
219 }
220 }