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annotate src/org/tmatesoft/hg/internal/CompleteRepoLock.java @ 709:497e697636fc

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Report merged lines as changed block if possible, not as a sequence of added/deleted blocks. To facilitate access to merge parent lines AddBlock got mergeLineAt() method that reports index of the line in the second parent (if any), while insertedAt() has been changed to report index in the first parent always
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 21 Aug 2013 16:23:27 +0200
parents 65c01508f002
children
rev   line source
617
65c01508f002 Rollback support for commands that modify repository. Strategy to keep complete copy of a file being changed
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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1 /*
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2 * Copyright (c) 2013 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.internal;
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18
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19 import static org.tmatesoft.hg.util.LogFacility.Severity.Error;
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20
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21 import org.tmatesoft.hg.core.HgRepositoryLockException;
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22 import org.tmatesoft.hg.repo.HgRepository;
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23 import org.tmatesoft.hg.repo.HgRepositoryLock;
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24 import org.tmatesoft.hg.util.LogFacility;
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25
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26 /**
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27 * Helper to lock both storage and working directory
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28 *
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29 * @author Artem Tikhomirov
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30 * @author TMate Software Ltd.
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31 */
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32 public final class CompleteRepoLock {
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33
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34 private final HgRepository repo;
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35 private HgRepositoryLock wdLock, storeLock;
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36
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37 public CompleteRepoLock(HgRepository hgRepo) {
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38 repo = hgRepo;
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39 }
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40
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41 public void acquire() throws HgRepositoryLockException {
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42 wdLock = repo.getWorkingDirLock();
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43 storeLock = repo.getStoreLock();
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44 wdLock.acquire();
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45 try {
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46 storeLock.acquire();
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47 } catch (HgRepositoryLockException ex) {
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48 try {
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49 wdLock.release();
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50 } catch (HgRepositoryLockException e2) {
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51 final LogFacility log = repo.getSessionContext().getLog();
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52 log.dump(getClass(), Error, e2, "Nested exception ignored once failed to acquire store lock");
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53 }
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54 throw ex;
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55 }
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56
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57 }
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58
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59 public void release() throws HgRepositoryLockException {
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60 try {
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61 storeLock.release();
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62 } catch (HgRepositoryLockException ex) {
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63 try {
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64 wdLock.release();
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65 } catch (HgRepositoryLockException e2) {
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66 final LogFacility log = repo.getSessionContext().getLog();
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67 log.dump(getClass(), Error, e2, "Nested exception ignored when releasing working directory lock");
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68 }
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69 throw ex;
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70 }
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71 wdLock.release();
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72 }
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73 }