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annotate src/org/tmatesoft/hg/repo/HgRemoteRepository.java @ 177:e10225daface

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Use POST for long between queries. Batch between queries (pass multiple pairs to a server) to minimize number thereof
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Sat, 02 Apr 2011 23:05:28 +0200
parents a8df7162ec75
children 62665d8f0686
rev   line source
170
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1 /*
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2 * Copyright (c) 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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19 import java.io.File;
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20 import java.io.IOException;
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21 import java.io.InputStreamReader;
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22 import java.io.OutputStream;
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23 import java.io.StreamTokenizer;
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24 import java.net.HttpURLConnection;
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25 import java.net.MalformedURLException;
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26 import java.net.URL;
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27 import java.net.URLConnection;
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28 import java.security.cert.CertificateException;
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29 import java.security.cert.X509Certificate;
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30 import java.util.Collection;
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31 import java.util.Collections;
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32 import java.util.Iterator;
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33 import java.util.LinkedHashMap;
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34 import java.util.LinkedList;
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35 import java.util.List;
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36 import java.util.Map;
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37 import java.util.prefs.BackingStoreException;
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38 import java.util.prefs.Preferences;
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39
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40 import javax.net.ssl.HttpsURLConnection;
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41 import javax.net.ssl.SSLContext;
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42 import javax.net.ssl.TrustManager;
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43 import javax.net.ssl.X509TrustManager;
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44
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45 import org.tmatesoft.hg.core.HgBadStateException;
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46 import org.tmatesoft.hg.core.HgException;
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47 import org.tmatesoft.hg.core.Nodeid;
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49 /**
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50 * WORK IN PROGRESS, DO NOT USE
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51 *
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52 * @see http://mercurial.selenic.com/wiki/WireProtocol
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53 *
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54 * @author Artem Tikhomirov
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55 * @author TMate Software Ltd.
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56 */
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57 public class HgRemoteRepository {
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58
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59 private final URL url;
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60 private final SSLContext sslContext;
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61 private final String authInfo;
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62
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63 HgRemoteRepository(URL url) throws HgException {
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64 if (url == null) {
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65 throw new IllegalArgumentException();
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66 }
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67 this.url = url;
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68 if ("https".equals(url.getProtocol())) {
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69 try {
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70 sslContext = SSLContext.getInstance("SSL");
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71 class TrustEveryone implements X509TrustManager {
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72 public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
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73 System.out.println("checkClientTrusted " + authType);
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74 }
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75 public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
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76 System.out.println("checkServerTrusted" + authType);
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77 }
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78 public X509Certificate[] getAcceptedIssuers() {
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79 return new X509Certificate[0];
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80 }
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81 };
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82 sslContext.init(null, new TrustManager[] { new TrustEveryone() }, null);
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83 } catch (Exception ex) {
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84 throw new HgException(ex);
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85 }
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86 } else {
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87 sslContext = null;
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88 }
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89 if (url.getUserInfo() != null) {
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90 String ai = null;
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91 try {
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92 // Hack to get Base64-encoded credentials
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93 Preferences tempNode = Preferences.userRoot().node("xxx");
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94 tempNode.putByteArray("xxx", url.getUserInfo().getBytes());
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95 ai = tempNode.get("xxx", null);
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96 tempNode.removeNode();
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97 } catch (BackingStoreException ex) {
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98 ex.printStackTrace();
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99 // IGNORE
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100 }
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101 authInfo = ai;
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102 } else {
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103 authInfo = null;
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104 }
171
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105 }
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106
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107 public List<Nodeid> heads() {
172
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108 return Collections.singletonList(Nodeid.fromAscii("71ddbf8603e8e09d54ac9c5fe4bb5ae824589f1d"));
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109 // return Collections.emptyList();
171
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110 }
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111
176
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112 public List<Nodeid> between(Nodeid tip, Nodeid base) throws HgException {
177
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113 Range r = new Range(base, tip);
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114 // XXX shall handle errors like no range key in the returned map, not sure how.
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115 return between(Collections.singletonList(r)).get(r);
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116 }
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117
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118 /**
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119 * @param ranges
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120 * @return map, where keys are input instances, values are corresponding server reply
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121 * @throws HgException
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122 */
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123 public Map<Range, List<Nodeid>> between(Collection<Range> ranges) throws HgException {
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124 if (ranges.isEmpty()) {
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125 return Collections.emptyMap();
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126 }
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127 // if fact, shall do other way round, this method shall send
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128 LinkedHashMap<Range, List<Nodeid>> rv = new LinkedHashMap<HgRemoteRepository.Range, List<Nodeid>>(ranges.size() * 4 / 3);
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129 StringBuilder sb = new StringBuilder(20 + ranges.size() * 82);
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130 sb.append("pairs=");
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131 for (Range r : ranges) {
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132 sb.append(r.end.toString());
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133 sb.append('-');
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134 sb.append(r.start.toString());
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135 sb.append('+');
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136 }
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137 if (sb.charAt(sb.length() - 1) == '+') {
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138 // strip last space
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139 sb.setLength(sb.length() - 1);
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140 }
176
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141 try {
177
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142 boolean usePOST = ranges.size() > 3;
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143 URL u = new URL(url, url.getPath() + "?cmd=between" + (usePOST ? "" : '&' + sb.toString()));
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144 HttpURLConnection c = setupConnection(u.openConnection());
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145 if (usePOST) {
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146 c.setRequestMethod("POST");
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147 c.setRequestProperty("Content-Length", String.valueOf(sb.length()/*nodeids are ASCII, bytes == characters */));
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148 c.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
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149 c.setDoOutput(true);
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150 c.connect();
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151 OutputStream os = c.getOutputStream();
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152 os.write(sb.toString().getBytes());
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153 os.flush();
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154 os.close();
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155 } else {
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156 c.connect();
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157 }
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158 System.out.printf("%d ranges, method:%s \n", ranges.size(), c.getRequestMethod());
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159 System.out.printf("Query (%d bytes):%s\n", u.getQuery().length(), u.getQuery());
176
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160 System.out.println("Response headers:");
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161 final Map<String, List<String>> headerFields = c.getHeaderFields();
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162 for (String s : headerFields.keySet()) {
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163 System.out.printf("%s: %s\n", s, c.getHeaderField(s));
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164 }
177
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165 InputStreamReader is = new InputStreamReader(c.getInputStream(), "US-ASCII");
176
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166 StreamTokenizer st = new StreamTokenizer(is);
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167 st.ordinaryChars('0', '9');
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168 st.wordChars('0', '9');
177
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169 st.eolIsSignificant(true);
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170 Iterator<Range> rangeItr = ranges.iterator();
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171 LinkedList<Nodeid> currRangeList = null;
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172 Range currRange = null;
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173 boolean possiblyEmptyNextLine = true;
176
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diff changeset
174 while (st.nextToken() != StreamTokenizer.TT_EOF) {
177
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175 if (st.ttype == StreamTokenizer.TT_EOL) {
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176 if (possiblyEmptyNextLine) {
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177 // newline follows newline;
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178 assert currRange == null;
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179 assert currRangeList == null;
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180 if (!rangeItr.hasNext()) {
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181 throw new HgBadStateException();
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182 }
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183 rv.put(rangeItr.next(), Collections.<Nodeid>emptyList());
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184 } else {
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185 if (currRange == null || currRangeList == null) {
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186 throw new HgBadStateException();
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187 }
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188 // indicate next range value is needed
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189 currRange = null;
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190 currRangeList = null;
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191 possiblyEmptyNextLine = true;
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192 }
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193 } else {
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diff changeset
194 possiblyEmptyNextLine = false;
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diff changeset
195 if (currRange == null) {
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diff changeset
196 if (!rangeItr.hasNext()) {
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197 throw new HgBadStateException();
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198 }
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199 currRange = rangeItr.next();
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200 currRangeList = new LinkedList<Nodeid>();
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201 rv.put(currRange, currRangeList);
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202 }
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203 Nodeid nid = Nodeid.fromAscii(st.sval);
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diff changeset
204 currRangeList.addLast(nid);
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diff changeset
205 }
176
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206 }
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207 is.close();
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208 return rv;
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209 } catch (MalformedURLException ex) {
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210 throw new HgException(ex);
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211 } catch (IOException ex) {
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212 throw new HgException(ex);
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213 }
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214 }
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215
171
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216 public List<RemoteBranch> branches(List<Nodeid> nodes) {
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217 return Collections.emptyList();
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218 }
170
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219
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220 // WireProtocol wiki: roots = a list of the latest nodes on every service side changeset branch that both the client and server know about.
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221 public HgBundle getChanges(List<Nodeid> roots) throws HgException {
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222 return new HgLookup().loadBundle(new File("/temp/hg/hg-bundle-000000000000-gz.tmp"));
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223 }
176
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224
177
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225 private HttpURLConnection setupConnection(URLConnection urlConnection) {
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226 urlConnection.setRequestProperty("User-Agent", "hg4j/0.5.0");
176
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227 urlConnection.addRequestProperty("Accept", "application/mercurial-0.1");
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228 if (authInfo != null) {
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229 urlConnection.addRequestProperty("Authorization", "Basic " + authInfo);
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230 }
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231 if (sslContext != null) {
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232 ((HttpsURLConnection) urlConnection).setSSLSocketFactory(sslContext.getSocketFactory());
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233 }
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234 return (HttpURLConnection) urlConnection;
176
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235 }
171
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236
176
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237 public static final class Range {
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238 /**
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239 * Root of the range, earlier revision
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240 */
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241 public final Nodeid start;
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242 /**
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243 * Head of the range, later revision.
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244 */
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245 public final Nodeid end;
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246
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247 /**
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248 * @param from - root/base revision
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249 * @param to - head/tip revision
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250 */
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251 public Range(Nodeid from, Nodeid to) {
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252 start = from;
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253 end = to;
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254 }
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255 }
171
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256 public static final class RemoteBranch {
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257 public final Nodeid head, root, p1, p2;
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258
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259 public RemoteBranch(Nodeid h, Nodeid r, Nodeid parent1, Nodeid parent2) {
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260 head = h;
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261 root = r;
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262 p1 = parent1;
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263 p2 = parent2;
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264 }
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265
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266 @Override
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267 public boolean equals(Object obj) {
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268 if (this == obj) {
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269 return true;
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270 }
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271 if (false == obj instanceof RemoteBranch) {
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272 return false;
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273 }
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274 RemoteBranch o = (RemoteBranch) obj;
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275 return head.equals(o.head) && root.equals(o.root) && (p1 == null && o.p1 == null || p1.equals(o.p1)) && (p2 == null && o.p2 == null || p2.equals(o.p2));
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276 }
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277 }
170
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278 }