Mercurial > hg4j

annotate src/org/tmatesoft/hg/core/HgOutgoingCommand.java @ 606:5daa42067e7c

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Avoid mmap files when only few bytes are to be read
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 07 May 2013 14:16:35 +0200
parents 2f9ed6bcefa2
children 6526d8adbc0f
rev   line source
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1 /*
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2 * Copyright (c) 2011-2012 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.core;
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19 import java.util.List;
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20 import java.util.Set;
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21 import java.util.TreeSet;
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22
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23 import org.tmatesoft.hg.internal.Internals;
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24 import org.tmatesoft.hg.internal.RepositoryComparator;
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25 import org.tmatesoft.hg.repo.HgChangelog;
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26 import org.tmatesoft.hg.repo.HgInvalidControlFileException;
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27 import org.tmatesoft.hg.repo.HgRemoteRepository;
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28 import org.tmatesoft.hg.repo.HgRepository;
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29 import org.tmatesoft.hg.repo.HgRuntimeException;
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30 import org.tmatesoft.hg.repo.HgParentChildMap;
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31 import org.tmatesoft.hg.util.CancelSupport;
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32 import org.tmatesoft.hg.util.CancelledException;
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33 import org.tmatesoft.hg.util.ProgressSupport;
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35 /**
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36 * Command to find out changes made in a local repository and missing at remote repository.
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37 *
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38 * @author Artem Tikhomirov
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39 * @author TMate Software Ltd.
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40 */
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41 public class HgOutgoingCommand extends HgAbstractCommand<HgOutgoingCommand> {
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42
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43 private final HgRepository localRepo;
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44 private HgRemoteRepository remoteRepo;
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45 @SuppressWarnings("unused")
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46 private boolean includeSubrepo;
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47 private RepositoryComparator comparator;
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48 private HgParentChildMap<HgChangelog> parentHelper;
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49 private Set<String> branches;
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51 public HgOutgoingCommand(HgRepository hgRepo) {
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52 localRepo = hgRepo;
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53 }
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55 /**
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56 * @param hgRemote remoteRepository to compare against
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57 * @return <code>this</code> for convenience
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58 */
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59 public HgOutgoingCommand against(HgRemoteRepository hgRemote) {
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60 remoteRepo = hgRemote;
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61 comparator = null;
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62 return this;
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63 }
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64
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65 /**
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66 * Select specific branch to pull.
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67 * Multiple branch specification possible (changeset from any of these would be included in result).
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68 * Note, {@link #executeLite()} does not respect this setting.
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69 *
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70 * @param branch - branch name, case-sensitive, non-null.
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71 * @return <code>this</code> for convenience
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72 * @throws IllegalArgumentException when branch argument is null
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73 */
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74 public HgOutgoingCommand branch(String branch) {
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75 if (branch == null) {
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76 throw new IllegalArgumentException();
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77 }
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78 if (branches == null) {
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79 branches = new TreeSet<String>();
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80 }
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81 branches.add(branch);
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82 return this;
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83 }
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85 /**
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86 * PLACEHOLDER, NOT IMPLEMENTED YET.
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87 *
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88 * @return <code>this</code> for convenience
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89 */
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90 public HgOutgoingCommand subrepo(boolean include) {
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91 includeSubrepo = include;
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92 throw Internals.notImplemented();
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93 }
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94
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95 /**
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96 * Lightweight check for outgoing changes.
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97 * Reported changes are from any branch (limits set by {@link #branch(String)} are not taken into account.
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98 *
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99 * @return list on local nodes known to be missing at remote server
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100 * @throws HgRemoteConnectionException when failed to communicate with remote repository
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101 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
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102 * @throws CancelledException if execution of the command was cancelled
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103 */
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104 public List<Nodeid> executeLite() throws HgRemoteConnectionException, HgException, CancelledException {
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105 final ProgressSupport ps = getProgressSupport(null);
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106 try {
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107 ps.start(10);
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108 return getComparator(new ProgressSupport.Sub(ps, 5), getCancelSupport(null, true)).getLocalOnlyRevisions();
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109 } catch (HgRuntimeException ex) {
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110 throw new HgLibraryFailureException(ex);
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111 } finally {
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112 ps.done();
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113 }
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114 }
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115
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116 /**
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117 * Complete information about outgoing changes
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118 *
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119 * @param handler delegate to process changes
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120 * @throws HgCallbackTargetException propagated exception from the handler
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121 * @throws HgRemoteConnectionException when failed to communicate with remote repository
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122 * @throws HgException subclass thereof to indicate specific issue with the command arguments or repository state
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123 * @throws CancelledException if execution of the command was cancelled
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124 */
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125 public void executeFull(final HgChangesetHandler handler) throws HgCallbackTargetException, HgException, CancelledException {
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126 if (handler == null) {
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127 throw new IllegalArgumentException("Delegate can't be null");
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128 }
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129 final ProgressSupport ps = getProgressSupport(handler);
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130 final CancelSupport cs = getCancelSupport(handler, true);
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131 try {
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132 ps.start(-1);
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133 ChangesetTransformer inspector = new ChangesetTransformer(localRepo, handler, getParentHelper(), ps, cs);
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134 inspector.limitBranches(branches);
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135 getComparator(new ProgressSupport.Sub(ps, 1), cs).visitLocalOnlyRevisions(inspector);
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136 inspector.checkFailure();
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137 } catch (HgRuntimeException ex) {
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138 throw new HgLibraryFailureException(ex);
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139 } finally {
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140 ps.done();
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141 }
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142 }
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143
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144 private RepositoryComparator getComparator(ProgressSupport ps, CancelSupport cs) throws HgRemoteConnectionException, HgInvalidControlFileException, CancelledException {
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145 if (remoteRepo == null) {
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146 throw new IllegalArgumentException("Shall specify remote repository to compare against");
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147 }
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148 if (comparator == null) {
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149 comparator = new RepositoryComparator(getParentHelper(), remoteRepo);
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150 comparator.compare(ps, cs);
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151 }
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152 return comparator;
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153 }
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154
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155 private HgParentChildMap<HgChangelog> getParentHelper() throws HgInvalidControlFileException {
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156 if (parentHelper == null) {
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157 parentHelper = new HgParentChildMap<HgChangelog>(localRepo.getChangelog());
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158 parentHelper.init();
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159 }
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160 return parentHelper;
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161 }
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162
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163 }