Mercurial > jhg
annotate src/org/tmatesoft/hg/internal/ChangelogMonitor.java @ 700:6e7786086f77 v1.2m2
Update gradle build to respect new dependency from trilead
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Thu, 08 Aug 2013 21:04:52 +0200 (2013-08-08) |
parents | 6526d8adbc0f |
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rev | line source |
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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 org.tmatesoft.hg.core.Nodeid; |
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20 import org.tmatesoft.hg.core.SessionContext; |
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21 import org.tmatesoft.hg.repo.HgRepository; |
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22 import org.tmatesoft.hg.repo.HgRuntimeException; |
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23 |
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24 /** |
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25 * Track changes to a repository based on recent changelog revision. |
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26 * TODO shall be merged with {@link RevlogChangeMonitor} and {@link FileChangeMonitor} into |
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27 * a single facility available from {@link SessionContext} |
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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 class ChangelogMonitor { |
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33 private final HgRepository repo; |
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34 private int changelogRevCount = -1; |
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35 private Nodeid changelogLastRev = null; |
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36 |
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37 public ChangelogMonitor(HgRepository hgRepo) { |
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38 repo = hgRepo; |
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39 } |
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40 |
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41 // memorize the state of the repository's changelog |
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42 public void touch() throws HgRuntimeException { |
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43 changelogRevCount = repo.getChangelog().getRevisionCount(); |
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44 changelogLastRev = safeGetRevision(changelogRevCount-1); |
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45 } |
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46 |
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47 // if present state doesn't match the one we remember |
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48 public boolean isChanged() throws HgRuntimeException { |
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49 int rc = repo.getChangelog().getRevisionCount(); |
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50 if (rc != changelogRevCount) { |
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51 return true; |
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52 } |
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53 Nodeid r = safeGetRevision(rc-1); |
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54 return !r.equals(changelogLastRev); |
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55 } |
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56 |
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57 // handles empty repository case |
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58 private Nodeid safeGetRevision(int revIndex) throws HgRuntimeException { |
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59 if (revIndex >= 0) { |
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60 return repo.getChangelog().getRevision(revIndex); |
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61 } |
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62 return Nodeid.NULL; |
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63 } |
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64 } |