Mercurial > jhg

annotate src/org/tmatesoft/hg/repo/HgLookup.java @ 338:3cfa4d908fc9

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Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close())
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 15 Nov 2011 04:47:03 +0100
parents 981f9f50bb6c
children dfb8405d996f
rev   line source
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1 /*
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2 * Copyright (c) 2010-2011 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.repo;
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18
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19 import java.io.File;
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20 import java.io.IOException;
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21 import java.net.MalformedURLException;
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22 import java.net.URL;
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23
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24 import org.tmatesoft.hg.core.HgBadArgumentException;
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25 import org.tmatesoft.hg.core.HgInvalidFileException;
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26 import org.tmatesoft.hg.core.SessionContext;
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27 import org.tmatesoft.hg.internal.BasicSessionContext;
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28 import org.tmatesoft.hg.internal.ConfigFile;
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29 import org.tmatesoft.hg.internal.DataAccessProvider;
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30
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31 /**
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32 * Utility methods to find Mercurial repository at a given location
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33 *
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34 * @author Artem Tikhomirov
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35 * @author TMate Software Ltd.
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36 */
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37 public class HgLookup {
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39 private ConfigFile globalCfg;
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40 private SessionContext sessionContext;
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41
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42 public HgLookup() {
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43 }
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44
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45 public HgLookup(SessionContext ctx) {
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46 sessionContext = ctx;
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47 }
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48
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49 public HgRepository detectFromWorkingDir() throws HgInvalidFileException {
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50 return detect(System.getProperty("user.dir"));
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51 }
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52
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53 public HgRepository detect(String location) throws HgInvalidFileException {
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54 return detect(new File(location));
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55 }
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56
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57 // look up in specified location and above
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58 public HgRepository detect(File location) throws HgInvalidFileException {
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59 File dir = location.getAbsoluteFile();
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60 File repository;
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61 do {
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62 repository = new File(dir, ".hg");
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63 if (repository.exists() && repository.isDirectory()) {
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64 break;
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65 }
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66 repository = null;
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67 dir = dir.getParentFile();
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68
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69 } while(dir != null);
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70 if (repository == null) {
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71 // return invalid repository
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72 return new HgRepository(location.getPath());
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73 }
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74 try {
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75 String repoPath = repository.getParentFile().getCanonicalPath();
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76 return new HgRepository(getContext(), repoPath, repository);
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77 } catch (IOException ex) {
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78 throw new HgInvalidFileException(location.toString(), ex, location);
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79 }
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80 }
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81
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82 public HgBundle loadBundle(File location) throws HgInvalidFileException {
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83 if (location == null || !location.canRead()) {
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84 throw new HgInvalidFileException(String.format("Can't read file %s", location == null ? null : location.getPath()), null, location);
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85 }
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86 return new HgBundle(new DataAccessProvider(getContext()), location).link();
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87 }
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89 /**
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90 * Try to instantiate remote server.
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91 * @param key either URL or a key from configuration file that points to remote server
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92 * @param hgRepo <em>NOT USED YET<em> local repository that may have extra config, or default remote location
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93 * @return an instance featuring access to remote repository, check {@link HgRemoteRepository#isInvalid()} before actually using it
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94 * @throws HgBadArgumentException if anything is wrong with the remote server's URL
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95 */
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96 public HgRemoteRepository detectRemote(String key, HgRepository hgRepo) throws HgBadArgumentException {
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97 URL url;
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98 Exception toReport;
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99 try {
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100 url = new URL(key);
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101 toReport = null;
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102 } catch (MalformedURLException ex) {
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103 url = null;
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104 toReport = ex;
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105 }
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106 if (url == null) {
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107 String server = getGlobalConfig().getSection("paths").get(key);
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108 if (server == null) {
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109 throw new HgBadArgumentException(String.format("Can't find server %s specification in the config", key), toReport);
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110 }
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111 try {
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112 url = new URL(server);
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113 } catch (MalformedURLException ex) {
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114 throw new HgBadArgumentException(String.format("Found %s server spec in the config, but failed to initialize with it", key), ex);
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115 }
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116 }
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117 return new HgRemoteRepository(getContext(), url);
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118 }
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119
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120 public HgRemoteRepository detect(URL url) throws HgBadArgumentException {
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121 if (url == null) {
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122 throw new IllegalArgumentException();
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123 }
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124 if (Boolean.FALSE.booleanValue()) {
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125 throw HgRepository.notImplemented();
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126 }
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127 return new HgRemoteRepository(getContext(), url);
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128 }
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129
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130 private ConfigFile getGlobalConfig() {
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131 if (globalCfg == null) {
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132 globalCfg = new ConfigFile();
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133 try {
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134 globalCfg.addLocation(new File(System.getProperty("user.home"), ".hgrc"));
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135 } catch (IOException ex) {
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136 // XXX perhaps, makes sense to let caller/client know that we've failed to read global config?
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137 getContext().getLog().warn(getClass(), ex, null);
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138 }
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139 }
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140 return globalCfg;
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141 }
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142
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143 private SessionContext getContext() {
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144 if (sessionContext == null) {
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145 sessionContext = new BasicSessionContext(null, null);
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146 }
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147 return sessionContext;
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148 }
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149 }