1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
/*
* Copyright (c) Contributors, http://opensimulator.org/
* See CONTRIBUTORS.TXT for a full list of copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the OpenSimulator Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
using System;
using System.Reflection;
using System.Threading;
using log4net;
using OpenMetaverse;
using OpenSim.Data;
using OpenSim.Framework.AssetLoader.Filesystem;
using OpenSim.Framework.Statistics;
namespace OpenSim.Framework.Communications.Cache
{
public abstract class AssetServerBase : IAssetServer
{
private static readonly ILog m_log
= LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
protected IAssetReceiver m_receiver;
protected BlockingQueue<AssetRequest> m_assetRequests = new BlockingQueue<AssetRequest>();
protected Thread m_localAssetServerThread;
protected IAssetDataPlugin m_assetProvider;
#region IPlugin
/// <summary>
/// The methods and properties in this region are needed to implement
/// the IPlugin interface and its local extensions.
/// These can all be overridden as appropriate by a derived class.
/// These methods are only applicable when a class is loaded by the
/// IPlugin mechanism.
///
/// Note that in the case of AssetServerBase, all initialization is
/// performed by the default constructor, so nothing additional is
/// required here. A derived class may wish to do more.
/// </summary>
public virtual string Name
{
// get { return "OpenSim.Framework.Communications.Cache.AssetServerBase"; }
get { return "AssetServerBase"; }
}
public virtual string Version
{
get { return "1.0"; }
}
public virtual void Initialise()
{
m_log.Debug("[ASSET SERVER]: IPlugin null initialization");
}
public virtual void Initialise(ConfigSettings settings)
{
m_log.Debug("[ASSET SERVER]: IPlugin null configured initialization(1)");
m_log.InfoFormat("[ASSET SERVER]: Initializing client [{0}/{1}", Name, Version);
}
public virtual void Initialise(ConfigSettings settings, string p_url)
{
m_log.Debug("[ASSET SERVER]: IPlugin null configured initialization(2)");
m_log.InfoFormat("[ASSET SERVER]: Initializing client [{0}/{1}", Name, Version);
}
public virtual void Initialise(ConfigSettings settings, string p_url, string p_dir, bool p_t)
{
m_log.Debug("[ASSET SERVER]: IPlugin null configured initialization(3)");
m_log.InfoFormat("[ASSET SERVER]: Initializing client [{0}/{1}", Name, Version);
}
public virtual void Dispose()
{
m_log.Debug("[ASSET SERVER]: dispose");
}
#endregion
public IAssetDataPlugin AssetProviderPlugin
{
get { return m_assetProvider; }
}
// Temporarily hardcoded - should be a plugin
protected IAssetLoader assetLoader = new AssetLoaderFileSystem();
public virtual void Start()
{
m_log.Debug("[ASSET SERVER]: Starting asset server");
m_localAssetServerThread = new Thread(RunRequests);
m_localAssetServerThread.Name = "LocalAssetServerThread";
m_localAssetServerThread.IsBackground = true;
m_localAssetServerThread.Start();
ThreadTracker.Add(m_localAssetServerThread);
}
public virtual void Stop()
{
m_localAssetServerThread.Abort();
}
public abstract void StoreAsset(AssetBase asset);
/// <summary>
/// This method must be implemented by a subclass to retrieve the asset named in the
/// AssetRequest. If the asset is not found, null should be returned.
/// </summary>
/// <param name="req"></param>
/// <returns></returns>
/// <exception cref="System.Exception">
/// Thrown if the request failed for some other reason than that the
/// asset cannot be found.
/// </exception>
protected abstract AssetBase GetAsset(AssetRequest req);
/// <summary>
/// Does the asset server have any waiting requests?
/// </summary>
///
/// This does include any request that is currently being handled. This information is not reliable where
/// another thread may be processing requests.
///
/// <returns>
/// True if there are waiting requests. False if there are no waiting requests.
/// </returns>
public virtual bool HasWaitingRequests()
{
return m_assetRequests.Count() != 0;
}
/// <summary>
/// Process an asset request. This method will call GetAsset(AssetRequest req)
/// on the subclass.
/// </summary>
public virtual void ProcessNextRequest()
{
AssetRequest req = m_assetRequests.Dequeue();
AssetBase asset;
try
{
asset = GetAsset(req);
}
catch (Exception e)
{
m_log.ErrorFormat("[ASSET]: Asset request for {0} threw exception {1} - Stack Trace: {2}", req.AssetID, e, e.StackTrace);
if (StatsManager.SimExtraStats != null)
StatsManager.SimExtraStats.AddAssetServiceRequestFailure();
m_receiver.AssetNotFound(req.AssetID, req.IsTexture);
return;
}
if (asset != null)
{
//m_log.DebugFormat("[ASSET]: Asset {0} received from asset server", req.AssetID);
m_receiver.AssetReceived(asset, req.IsTexture);
}
else
{
//m_log.WarnFormat("[ASSET]: Asset {0} not found by asset server", req.AssetID);
m_receiver.AssetNotFound(req.AssetID, req.IsTexture);
}
}
public virtual void LoadDefaultAssets(string pAssetSetsXml)
{
m_log.Info("[ASSET SERVER]: Setting up asset database");
assetLoader.ForEachDefaultXmlAsset(pAssetSetsXml, StoreAsset);
}
private void RunRequests()
{
while (true) // Since it's a 'blocking queue'
{
try
{
ProcessNextRequest();
}
catch (Exception e)
{
m_log.Error("[ASSET SERVER]: " + e.ToString());
}
}
}
/// <summary>
/// The receiver will be called back with asset data once it comes in.
/// </summary>
/// <param name="receiver"></param>
public void SetReceiver(IAssetReceiver receiver)
{
m_receiver = receiver;
}
public void RequestAsset(UUID assetID, bool isTexture)
{
AssetRequest req = new AssetRequest();
req.AssetID = assetID;
req.IsTexture = isTexture;
m_assetRequests.Enqueue(req);
//m_log.DebugFormat("[ASSET SERVER]: Added {0} to request queue", assetID);
}
public virtual void UpdateAsset(AssetBase asset)
{
m_assetProvider.UpdateAsset(asset);
}
public void SetServerInfo(string ServerUrl, string ServerKey)
{
}
}
}
|
