Skip to main content
aboutsummaryrefslogtreecommitdiffstats
blob: a3a4574e32bd925f48e30da6273ff3fd9b4eb679 (plain) (blame)
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
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
/***************************************************************************
 * Copyright (c) 2004 - 2008 Eike Stepper, Germany.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *    Eike Stepper - initial API and implementation
 *    Simon McDuff - https://bugs.eclipse.org/bugs/show_bug.cgi?id=201266
 *    Simon McDuff - https://bugs.eclipse.org/bugs/show_bug.cgi?id=210868
 **************************************************************************/
package org.eclipse.emf.cdo.internal.server;

import org.eclipse.emf.cdo.internal.protocol.model.CDOClassImpl;
import org.eclipse.emf.cdo.internal.protocol.revision.CDORevisionResolverImpl;
import org.eclipse.emf.cdo.internal.protocol.revision.InternalCDORevision;
import org.eclipse.emf.cdo.internal.protocol.revision.delta.CDORevisionDeltaImpl;
import org.eclipse.emf.cdo.protocol.id.CDOID;
import org.eclipse.emf.cdo.protocol.id.CDOIDObjectFactory;
import org.eclipse.emf.cdo.protocol.model.CDOFeature;
import org.eclipse.emf.cdo.protocol.model.resource.CDOPathFeature;
import org.eclipse.emf.cdo.protocol.revision.CDOReferenceProxy;
import org.eclipse.emf.cdo.protocol.revision.CDORevision;
import org.eclipse.emf.cdo.protocol.revision.CDORevisionUtil;
import org.eclipse.emf.cdo.server.IRevisionManager;
import org.eclipse.emf.cdo.server.IStoreChunkReader;
import org.eclipse.emf.cdo.server.IStoreReader;
import org.eclipse.emf.cdo.server.IStoreWriter;
import org.eclipse.emf.cdo.server.StoreUtil;
import org.eclipse.emf.cdo.server.IRepository.Props;
import org.eclipse.emf.cdo.server.IStoreChunkReader.Chunk;

import org.eclipse.net4j.util.collection.MoveableList;
import org.eclipse.net4j.util.transaction.ITransaction;
import org.eclipse.net4j.util.transaction.ITransactionalOperation;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

/**
 * @author Eike Stepper
 */
public class RevisionManager extends CDORevisionResolverImpl implements IRevisionManager
{
  private Repository repository;

  private CDOPathFeature cdoPathFeature;

  public RevisionManager(Repository repository)
  {
    this.repository = repository;
    cdoPathFeature = repository.getPackageManager().getCDOResourcePackage().getCDOResourceClass().getCDOPathFeature();
  }

  public Repository getRepository()
  {
    return repository;
  }

  public CDOIDObjectFactory getCDOIDObjectFactory()
  {
    return repository.getStore().getCDOIDObjectFactory();
  }

  public void addRevision(ITransaction<IStoreWriter> storeTransaction, InternalCDORevision revision)
  {
    storeTransaction.execute(new AddRevisionOperation(revision));
  }

  public void addRevisionDelta(ITransaction<IStoreWriter> storeTransaction, CDORevisionDeltaImpl delta)
  {
    storeTransaction.execute(new AddRevisionDeltaOperation(delta));
  }

  public CDOID resolveReferenceProxy(CDOReferenceProxy referenceProxy)
  {
    throw new UnsupportedOperationException("Reference proxies not supported on server side");
  }

  public List<Integer> analyzeReferenceRanges(List<Object> list)
  {
    // There are currently no reference proxies on server side
    return null;
  }

  @Override
  protected InternalCDORevision verifyRevision(InternalCDORevision revision, int referenceChunk)
  {
    IStoreReader storeReader = null;
    revision = super.verifyRevision(revision, referenceChunk);
    if (repository.isVerifyingRevisions())
    {
      storeReader = StoreUtil.getReader();
      revision = (InternalCDORevision)storeReader.verifyRevision(revision);
    }

    ensureChunks(revision, referenceChunk, storeReader);
    return revision;
  }

  protected void ensureChunks(InternalCDORevision revision, int referenceChunk, IStoreReader storeReader)
  {
    CDOClassImpl cdoClass = (CDOClassImpl)revision.getCDOClass();
    CDOFeature[] features = cdoClass.getAllFeatures();
    for (int i = 0; i < features.length; i++)
    {
      CDOFeature feature = features[i];
      if (feature.isReference() && feature.isMany())
      {
        MoveableList<Object> list = revision.getList(feature);
        int chunkEnd = Math.min(referenceChunk, list.size());
        storeReader = ensureChunk(revision, feature, storeReader, list, 0, chunkEnd);
      }
    }
  }

  public IStoreReader ensureChunk(InternalCDORevision revision, CDOFeature feature, int chunkStart, int chunkEnd)
  {
    MoveableList<Object> list = revision.getList(feature);
    chunkEnd = Math.min(chunkEnd, list.size());
    return ensureChunk(revision, feature, StoreUtil.getReader(), list, chunkStart, chunkEnd);
  }

  protected IStoreReader ensureChunk(InternalCDORevision revision, CDOFeature feature, IStoreReader storeReader,
      MoveableList<Object> list, int chunkStart, int chunkEnd)
  {
    IStoreChunkReader chunkReader = null;
    int fromIndex = -1;
    for (int j = chunkStart; j < chunkEnd; j++)
    {
      if (list.get(j) == InternalCDORevision.UNINITIALIZED)
      {
        if (fromIndex == -1)
        {
          fromIndex = j;
        }
      }
      else
      {
        if (fromIndex != -1)
        {
          if (chunkReader == null)
          {
            if (storeReader == null)
            {
              storeReader = StoreUtil.getReader();
            }

            chunkReader = storeReader.createChunkReader(revision, feature);
          }

          int toIndex = j;
          if (fromIndex == toIndex - 1)
          {
            chunkReader.addSimpleChunk(fromIndex);
          }
          else
          {
            chunkReader.addRangedChunk(fromIndex, toIndex);
          }

          fromIndex = -1;
        }
      }
    }

    // Add last chunk
    if (fromIndex != -1)
    {
      if (chunkReader == null)
      {
        if (storeReader == null)
        {
          storeReader = StoreUtil.getReader();
        }

        chunkReader = storeReader.createChunkReader(revision, feature);
      }

      int toIndex = chunkEnd;
      if (fromIndex == toIndex - 1)
      {
        chunkReader.addSimpleChunk(fromIndex);
      }
      else
      {
        chunkReader.addRangedChunk(fromIndex, toIndex);
      }
    }

    if (chunkReader != null)
    {
      List<Chunk> chunks = chunkReader.executeRead();
      for (Chunk chunk : chunks)
      {
        int startIndex = chunk.getStartIndex();
        for (int indexInChunk = 0; indexInChunk < chunk.size(); indexInChunk++)
        {
          CDOID id = chunk.getID(indexInChunk);
          list.set(startIndex + indexInChunk, id);
        }
      }
    }

    return storeReader;
  }

  @Override
  protected InternalCDORevision loadRevision(CDOID id, int referenceChunk)
  {
    IStoreReader storeReader = StoreUtil.getReader();
    return (InternalCDORevision)storeReader.readRevision(id, referenceChunk);
  }

  @Override
  protected InternalCDORevision loadRevisionByTime(CDOID id, int referenceChunk, long timeStamp)
  {
    IStoreReader storeReader = StoreUtil.getReader();
    return (InternalCDORevision)storeReader.readRevisionByTime(id, referenceChunk, timeStamp);
  }

  @Override
  protected InternalCDORevision loadRevisionByVersion(CDOID id, int referenceChunk, int version)
  {
    IStoreReader storeReader = StoreUtil.getReader();
    return (InternalCDORevision)storeReader.readRevisionByVersion(id, referenceChunk, version);
  }

  @Override
  protected List<InternalCDORevision> loadRevisions(Collection<CDOID> ids, int referenceChunk)
  {
    IStoreReader storeReader = StoreUtil.getReader();
    List<InternalCDORevision> revisions = new ArrayList<InternalCDORevision>();
    for (CDOID id : ids)
    {
      InternalCDORevision revision = (InternalCDORevision)storeReader.readRevision(id, referenceChunk);
      revisions.add(revision);
    }

    return revisions;
  }

  @Override
  protected List<InternalCDORevision> loadRevisionsByTime(Collection<CDOID> ids, int referenceChunk, long timeStamp)
  {
    IStoreReader storeReader = StoreUtil.getReader();
    List<InternalCDORevision> revisions = new ArrayList<InternalCDORevision>();
    for (CDOID id : ids)
    {
      InternalCDORevision revision = (InternalCDORevision)storeReader.readRevisionByTime(id, referenceChunk, timeStamp);
      revisions.add(revision);
    }

    return revisions;
  }

  @Override
  protected void doBeforeActivate() throws Exception
  {
    super.doBeforeActivate();
    setCurrentLRUCapacity(getLRUCapacity(Props.PROP_CURRENT_LRU_CAPACITY));
    setRevisedLRUCapacity(getLRUCapacity(Props.PROP_REVISED_LRU_CAPACITY));
  }

  protected int getLRUCapacity(String prop)
  {
    String capacity = repository.getProperties().get(prop);
    return capacity == null ? 0 : Integer.valueOf(capacity);
  }

  /**
   * @author Eike Stepper
   */
  private final class AddRevisionOperation implements ITransactionalOperation<IStoreWriter>
  {
    private InternalCDORevision revision;

    private AddRevisionOperation(InternalCDORevision revision)
    {
      this.revision = revision;
    }

    public void phase1(IStoreWriter storeWriter) throws Exception
    {
      // Can throw an exception if duplicate
      storeWriter.writeRevision(revision);
    }

    public void phase2(IStoreWriter storeWriter)
    {
      addRevision(revision);
      if (revision.isResource())
      {
        String path = (String)revision.getData().get(cdoPathFeature, -1);
        repository.getResourceManager().registerResource(revision.getID(), path);
      }
    }

    public void undoPhase1(IStoreWriter storeWriter)
    {
    }
  }

  /**
   * @author Simon McDuff
   */
  private final class AddRevisionDeltaOperation implements ITransactionalOperation<IStoreWriter>
  {
    private CDORevisionDeltaImpl revisionDelta;

    private InternalCDORevision dirtyRevision;

    private AddRevisionDeltaOperation(CDORevisionDeltaImpl revisionDelta)
    {
      this.revisionDelta = revisionDelta;
    }

    public void phase1(IStoreWriter storeWriter) throws Exception
    {
      boolean supportDelta = getRepository().isSupportingRevisionDeltas();
      InternalCDORevision originRevision = getRevisionByVersion(revisionDelta.getID(), CDORevision.UNCHUNKED,
          revisionDelta.getOriginVersion(), !supportDelta);

      if (originRevision != null)
      {
        dirtyRevision = (InternalCDORevision)CDORevisionUtil.copy(originRevision);
        revisionDelta.apply(dirtyRevision);
      }
      else if (!supportDelta)
      {
        // Origin revision need to be accessible for stores that do not support deltas
        throw new IllegalStateException("Can not retrieve origin revision");
      }

      if (supportDelta)
      {
        // Can throw an exception if duplicate
        storeWriter.writeRevisionDelta(revisionDelta);
      }
      else
      {
        // Can throw an exception if duplicate
        storeWriter.writeRevision(dirtyRevision);
      }
    }

    public void phase2(IStoreWriter storeWriter)
    {
      if (dirtyRevision != null)
      {
        addRevision(dirtyRevision);
      }
    }

    public void undoPhase1(IStoreWriter storeWriter)
    {
    }
  }
}

Back to the top