aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/OpenSim/Data/SQLite/SQLiteAssetData.cs
blob: 11be28e2bf3d1a23de5c77aaebebe6c3d038bae5 (plain)
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
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
/*
 * 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.Data;
using System.Reflection;
using System.Collections.Generic;
using log4net;
using Mono.Data.SqliteClient;
using OpenMetaverse;
using OpenSim.Framework;

namespace OpenSim.Data.SQLite
{
    /// <summary>
    /// An asset storage interface for the SQLite database system
    /// </summary>
    public class SQLiteAssetData : AssetDataBase
    {
        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        private const string SelectAssetSQL = "select * from assets where UUID=:UUID";
        private const string SelectAssetMetadataSQL = "select Name, Description, Type, Temporary, UUID from assets limit :start, :count";
        private const string DeleteAssetSQL = "delete from assets where UUID=:UUID";
        private const string InsertAssetSQL = "insert into assets(UUID, Name, Description, Type, Local, Temporary, Data) values(:UUID, :Name, :Description, :Type, :Local, :Temporary, :Data)";
        private const string UpdateAssetSQL = "update assets set Name=:Name, Description=:Description, Type=:Type, Local=:Local, Temporary=:Temporary, Data=:Data where UUID=:UUID";
        private const string assetSelect = "select * from assets";

        private SqliteConnection m_conn;

        override public void Dispose()
        {
            if (m_conn != null)
            {
                m_conn.Close();
                m_conn = null;
            }
        }

        /// <summary>
        /// <list type="bullet">
        /// <item>Initialises AssetData interface</item>
        /// <item>Loads and initialises a new SQLite connection and maintains it.</item>
        /// <item>use default URI if connect string is empty.</item>
        /// </list>
        /// </summary>
        /// <param name="dbconnect">connect string</param>
        override public void Initialise(string dbconnect)
        {
            if (dbconnect == string.Empty)
            {
                dbconnect = "URI=file:Asset.db,version=3";
            }
            m_conn = new SqliteConnection(dbconnect);
            m_conn.Open();

            Assembly assem = GetType().Assembly;
            Migration m = new Migration(m_conn, assem, "AssetStore");
            m.Update();

            return;
        }

        /// <summary>
        /// Fetch Asset
        /// </summary>
        /// <param name="uuid">UUID of ... ?</param>
        /// <returns>Asset base</returns>
        override public AssetBase GetAsset(UUID uuid)
        {
            lock (this)
            {
                using (SqliteCommand cmd = new SqliteCommand(SelectAssetSQL, m_conn))
                {
                    cmd.Parameters.Add(new SqliteParameter(":UUID", uuid.ToString()));
                    using (IDataReader reader = cmd.ExecuteReader())
                    {
                        if (reader.Read())
                        {
                            AssetBase asset = buildAsset(reader);
                            reader.Close();
                            return asset;
                        }
                        else
                        {
                            reader.Close();
                            return null;
                        }
                    }
                }
            }
        }

        /// <summary>
        /// Create an asset
        /// </summary>
        /// <param name="asset">Asset Base</param>
        override public void StoreAsset(AssetBase asset)
        {
            //m_log.Info("[ASSET DB]: Creating Asset " + asset.FullID.ToString());
            if (ExistsAsset(asset.FullID))
            {
                //LogAssetLoad(asset);

                lock (this)
                {
                    using (SqliteCommand cmd = new SqliteCommand(UpdateAssetSQL, m_conn))
                    {
                        cmd.Parameters.Add(new SqliteParameter(":UUID", asset.FullID.ToString()));
                        cmd.Parameters.Add(new SqliteParameter(":Name", asset.Name));
                        cmd.Parameters.Add(new SqliteParameter(":Description", asset.Description));
                        cmd.Parameters.Add(new SqliteParameter(":Type", asset.Type));
                        cmd.Parameters.Add(new SqliteParameter(":Local", asset.Local));
                        cmd.Parameters.Add(new SqliteParameter(":Temporary", asset.Temporary));
                        cmd.Parameters.Add(new SqliteParameter(":Data", asset.Data));

                        cmd.ExecuteNonQuery();
                    }
                }
            }
            else
            {
                lock (this)
                {
                    using (SqliteCommand cmd = new SqliteCommand(InsertAssetSQL, m_conn))
                    {
                        cmd.Parameters.Add(new SqliteParameter(":UUID", asset.FullID.ToString()));
                        cmd.Parameters.Add(new SqliteParameter(":Name", asset.Name));
                        cmd.Parameters.Add(new SqliteParameter(":Description", asset.Description));
                        cmd.Parameters.Add(new SqliteParameter(":Type", asset.Type));
                        cmd.Parameters.Add(new SqliteParameter(":Local", asset.Local));
                        cmd.Parameters.Add(new SqliteParameter(":Temporary", asset.Temporary));
                        cmd.Parameters.Add(new SqliteParameter(":Data", asset.Data));

                        cmd.ExecuteNonQuery();
                    }
                }
            }
        }

        /// <summary>
        /// Some... logging functionnality
        /// </summary>
        /// <param name="asset"></param>
        private static void LogAssetLoad(AssetBase asset)
        {
            string temporary = asset.Temporary ? "Temporary" : "Stored";
            string local = asset.Local ? "Local" : "Remote";

            int assetLength = (asset.Data != null) ? asset.Data.Length : 0;

            m_log.Debug("[ASSET DB]: " +
                                     string.Format("Loaded {5} {4} Asset: [{0}][{3}] \"{1}\":{2} ({6} bytes)",
                                                   asset.FullID, asset.Name, asset.Description, asset.Type,
                                                   temporary, local, assetLength));
        }

        /// <summary>
        /// Check if an asset exist in database
        /// </summary>
        /// <param name="uuid">The asset UUID</param>
        /// <returns>True if exist, or false.</returns>
        override public bool ExistsAsset(UUID uuid)
        {
            lock (this) {
                using (SqliteCommand cmd = new SqliteCommand(SelectAssetSQL, m_conn))
                {
                    cmd.Parameters.Add(new SqliteParameter(":UUID", uuid.ToString()));
                    using (IDataReader reader = cmd.ExecuteReader())
                    {
                        if (reader.Read())
                        {
                            reader.Close();
                            return true;
                        }
                        else
                        {
                            reader.Close();
                            return false;
                        }
                    }
                }
            }
        }

        /// <summary>
        /// Delete an asset from database
        /// </summary>
        /// <param name="uuid"></param>
        public void DeleteAsset(UUID uuid)
        {
            using (SqliteCommand cmd = new SqliteCommand(DeleteAssetSQL, m_conn))
            {
                cmd.Parameters.Add(new SqliteParameter(":UUID", uuid.ToString()));

                cmd.ExecuteNonQuery();
            }
        }

        /// <summary>
        ///
        /// </summary>
        /// <param name="row"></param>
        /// <returns></returns>
        private static AssetBase buildAsset(IDataReader row)
        {
            // TODO: this doesn't work yet because something more
            // interesting has to be done to actually get these values
            // back out.  Not enough time to figure it out yet.
            AssetBase asset = new AssetBase(
                new UUID((String)row["UUID"]),
                (String)row["Name"],
                Convert.ToSByte(row["Type"])
            );

            asset.Description = (String) row["Description"];
            asset.Local = Convert.ToBoolean(row["Local"]);
            asset.Temporary = Convert.ToBoolean(row["Temporary"]);
            asset.Data = (byte[]) row["Data"];
            return asset;
        }

        private static AssetMetadata buildAssetMetadata(IDataReader row)
        {
            AssetMetadata metadata = new AssetMetadata();

            metadata.FullID = new UUID((string) row["UUID"]);
            metadata.Name = (string) row["Name"];
            metadata.Description = (string) row["Description"];
            metadata.Type = Convert.ToSByte(row["Type"]);
            metadata.Temporary = Convert.ToBoolean(row["Temporary"]); // Not sure if this is correct.

            // Current SHA1s are not stored/computed.
            metadata.SHA1 = new byte[] {};

            return metadata;
        }

        /// <summary>
        /// Returns a list of AssetMetadata objects. The list is a subset of
        /// the entire data set offset by <paramref name="start" /> containing
        /// <paramref name="count" /> elements.
        /// </summary>
        /// <param name="start">The number of results to discard from the total data set.</param>
        /// <param name="count">The number of rows the returned list should contain.</param>
        /// <returns>A list of AssetMetadata objects.</returns>
        public override List<AssetMetadata> FetchAssetMetadataSet(int start, int count)
        {
            List<AssetMetadata> retList = new List<AssetMetadata>(count);

            lock (this)
            {
                using (SqliteCommand cmd = new SqliteCommand(SelectAssetMetadataSQL, m_conn))
                {
                    cmd.Parameters.Add(new SqliteParameter(":start", start));
                    cmd.Parameters.Add(new SqliteParameter(":count", count));

                    using (IDataReader reader = cmd.ExecuteReader())
                    {
                        while (reader.Read())
                        {
                            AssetMetadata metadata = buildAssetMetadata(reader);
                            retList.Add(metadata);
                        }
                    }
                }
            }

            return retList;
        }

        /***********************************************************************
         *
         *  Database Binding functions
         *
         *  These will be db specific due to typing, and minor differences
         *  in databases.
         *
         **********************************************************************/

        #region IPlugin interface

        /// <summary>
        ///
        /// </summary>
        override public string Version
        {
            get
            {
                Module module = GetType().Module;
                // string dllName = module.Assembly.ManifestModule.Name;
                Version dllVersion = module.Assembly.GetName().Version;

                return
                    string.Format("{0}.{1}.{2}.{3}", dllVersion.Major, dllVersion.Minor, dllVersion.Build,
                                  dllVersion.Revision);
            }
        }

        /// <summary>
        /// Initialise the AssetData interface using default URI
        /// </summary>
        override public void Initialise()
        {
            Initialise("URI=file:Asset.db,version=3");
        }

        /// <summary>
        /// Name of this DB provider
        /// </summary>
        override public string Name
        {
            get { return "SQLite Asset storage engine"; }
        }

        #endregion
    }
}