Skip to main content
aboutsummaryrefslogtreecommitdiffstats
blob: 5c8bb5475dbf3c417be1f12a297cf90ebfa5f5fe (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
/*
 * Copyright (c) 2010-2013, 2015 Eike Stepper (Berlin, Germany) and others.
 * 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
 */
package org.eclipse.emf.cdo.internal.common.branch;

import org.eclipse.emf.cdo.common.CDOCommonRepository;
import org.eclipse.emf.cdo.common.branch.CDOBranch;
import org.eclipse.emf.cdo.common.branch.CDOBranchChangedEvent;
import org.eclipse.emf.cdo.common.branch.CDOBranchChangedEvent.ChangeKind;
import org.eclipse.emf.cdo.common.branch.CDOBranchHandler;
import org.eclipse.emf.cdo.common.branch.CDOBranchManager;
import org.eclipse.emf.cdo.common.branch.CDOBranchPoint;
import org.eclipse.emf.cdo.common.util.CDOTimeProvider;
import org.eclipse.emf.cdo.spi.common.branch.InternalCDOBranch;
import org.eclipse.emf.cdo.spi.common.branch.InternalCDOBranchManager;
import org.eclipse.emf.cdo.spi.common.branch.InternalCDOBranchManager.BranchLoader.BranchInfo;

import org.eclipse.net4j.util.collection.Pair;
import org.eclipse.net4j.util.container.Container;
import org.eclipse.net4j.util.event.Event;
import org.eclipse.net4j.util.ref.ReferenceValueMap;
import org.eclipse.net4j.util.ref.ReferenceValueMap.Soft;

import java.text.MessageFormat;
import java.util.Map;

/**
 * @author Eike Stepper
 */
public class CDOBranchManagerImpl extends Container<CDOBranch>implements InternalCDOBranchManager
{
  private CDOCommonRepository repository;

  private BranchLoader branchLoader;

  private InternalCDOBranch mainBranch;

  private Map<Integer, InternalCDOBranch> branches = createMap();

  public CDOBranchManagerImpl()
  {
  }

  public CDOCommonRepository getRepository()
  {
    return repository;
  }

  public void setRepository(CDOCommonRepository repository)
  {
    this.repository = repository;
  }

  public BranchLoader getBranchLoader()
  {
    return branchLoader;
  }

  public void setBranchLoader(BranchLoader branchLoader)
  {
    checkInactive();
    this.branchLoader = branchLoader;
  }

  public CDOTimeProvider getTimeProvider()
  {
    return repository;
  }

  @Deprecated
  public void setTimeProvider(CDOTimeProvider timeProvider)
  {
    throw new UnsupportedOperationException();
  }

  public void initMainBranch(boolean local, long timeStamp)
  {
    mainBranch = new CDOBranchImpl.Main(this, local, timeStamp);
  }

  @Deprecated
  public void handleBranchCreated(InternalCDOBranch branch)
  {
    handleBranchChanged(branch, ChangeKind.CREATED);
  }

  public void handleBranchChanged(InternalCDOBranch branch, ChangeKind changeKind)
  {
    if (changeKind == ChangeKind.CREATED)
    {
      CDOBranchPoint base = branch.getBase();
      InternalCDOBranch baseBranch = (InternalCDOBranch)base.getBranch();
      baseBranch.addChild(branch);

      fireEvent(new BranchCreatedEvent(branch));
    }
    else
    {
      fireEvent(new BranchChangedEvent(branch, changeKind));
    }
  }

  public CDOBranch[] getElements()
  {
    return new CDOBranch[] { getMainBranch() };
  }

  public InternalCDOBranch getMainBranch()
  {
    checkActive();
    return mainBranch;
  }

  public InternalCDOBranch getBranch(int branchID)
  {
    checkActive();
    if (branchID == CDOBranch.MAIN_BRANCH_ID)
    {
      return mainBranch;
    }

    if (!repository.isSupportingBranches())
    {
      return null;
    }

    InternalCDOBranch branch;
    synchronized (branches)
    {
      branch = branches.get(branchID);
      if (branch == null)
      {
        branch = new CDOBranchImpl(this, branchID, null, null);
        putBranch(branch);
      }
    }

    return branch;
  }

  public InternalCDOBranch getBranch(int id, String name, InternalCDOBranch baseBranch, long baseTimeStamp)
  {
    synchronized (branches)
    {
      InternalCDOBranch branch = branches.get(id);
      if (branch == null)
      {
        branch = new CDOBranchImpl(this, id, name, baseBranch.getPoint(baseTimeStamp));
        putBranch(branch);
      }
      else if (branch.isProxy())
      {
        branch.setBranchInfo(name, baseBranch, baseTimeStamp);
      }

      return branch;
    }
  }

  public InternalCDOBranch getBranch(int id, BranchInfo branchInfo)
  {
    String name = branchInfo.getName();
    InternalCDOBranch baseBranch = getBranch(branchInfo.getBaseBranchID());
    long baseTimeStamp = branchInfo.getBaseTimeStamp();
    return getBranch(id, name, baseBranch, baseTimeStamp);
  }

  public InternalCDOBranch getBranch(String path)
  {
    if (path.startsWith(CDOBranch.PATH_SEPARATOR))
    {
      path = path.substring(1);
    }

    int sep = path.indexOf(CDOBranch.PATH_SEPARATOR);
    if (sep == -1)
    {
      if (CDOBranch.MAIN_BRANCH_NAME.equals(path))
      {
        return mainBranch;
      }

      return null;
    }

    if (!repository.isSupportingBranches())
    {
      return null;
    }

    String name = path.substring(0, sep);
    if (CDOBranch.MAIN_BRANCH_NAME.equals(name))
    {
      String rest = path.substring(sep + 1);
      return mainBranch.getBranch(rest);
    }

    return null;
  }

  public int getBranches(int startID, int endID, CDOBranchHandler handler)
  {
    checkActive();
    if (!repository.isSupportingBranches())
    {
      if (startID <= CDOBranch.MAIN_BRANCH_ID && CDOBranch.MAIN_BRANCH_ID <= endID)
      {
        handler.handleBranch(mainBranch);
        return 1;
      }

      return 0;
    }

    return branchLoader.loadBranches(startID, endID, handler);
  }

  public InternalCDOBranch createBranch(int branchID, String name, InternalCDOBranch baseBranch, long baseTimeStamp)
  {
    checkActive();

    Pair<Integer, Long> result = branchLoader.createBranch(branchID,
        new BranchInfo(name, baseBranch.getID(), baseTimeStamp));
    branchID = result.getElement1();
    baseTimeStamp = result.getElement2();

    CDOBranchPoint base = baseBranch.getPoint(baseTimeStamp);
    InternalCDOBranch branch = new CDOBranchImpl(this, branchID, name, base);

    synchronized (branches)
    {
      putBranch(branch);
    }

    handleBranchCreated(branch);
    return branch;
  }

  @Deprecated
  public void renameBranch(CDOBranch branch, String newName)
  {
    branch.setName(newName);
  }

  @Override
  public String toString()
  {
    return MessageFormat.format("BranchManager[loader={0}]", branchLoader);
  }

  /**
   * {@link #branches} must be synchronized by caller!
   */
  private boolean putBranch(InternalCDOBranch branch)
  {
    int id = branch.getID();
    if (branches.containsKey(id))
    {
      return false;
    }

    branches.put(id, branch);
    return true;
  }

  protected Soft<Integer, InternalCDOBranch> createMap()
  {
    return new ReferenceValueMap.Soft<Integer, InternalCDOBranch>();
  }

  @Override
  protected void doBeforeActivate() throws Exception
  {
    super.doBeforeActivate();
    checkState(repository, "repository"); //$NON-NLS-1$
    checkState(branchLoader, "branchLoader"); //$NON-NLS-1$
  }

  /**
   * @author Eike Stepper
   */
  private static class BranchChangedEvent extends Event implements CDOBranchChangedEvent
  {
    private static final long serialVersionUID = 1L;

    private CDOBranch branch;

    private ChangeKind changeKind;

    public BranchChangedEvent(CDOBranch branch, ChangeKind changeKind)
    {
      super(branch.getBranchManager());
      this.branch = branch;
      this.changeKind = changeKind;
    }

    @Override
    public CDOBranchManager getSource()
    {
      return (CDOBranchManager)super.getSource();
    }

    public CDOBranch getBranch()
    {
      return branch;
    }

    public ChangeKind getChangeKind()
    {
      return changeKind;
    }
  }

  /**
   * @author Eike Stepper
   */
  @Deprecated
  private static final class BranchCreatedEvent extends BranchChangedEvent
      implements org.eclipse.emf.cdo.common.branch.CDOBranchCreatedEvent
  {
    private static final long serialVersionUID = 1L;

    public BranchCreatedEvent(CDOBranch branch)
    {
      super(branch, ChangeKind.CREATED);
    }
  }
}

Back to the top