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annotate src/org/tmatesoft/hg/internal/RevlogStream.java @ 617:65c01508f002

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Rollback support for commands that modify repository. Strategy to keep complete copy of a file being changed
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 15 May 2013 20:10:09 +0200
parents e1b29756f901
children 99ad1e3a4e4d
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1 /*
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2 * Copyright (c) 2010-2013 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.repo.HgRepository.BAD_REVISION;
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20 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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21 import static org.tmatesoft.hg.internal.Internals.REVLOGV1_RECORD_SIZE;
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23 import java.io.File;
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24 import java.io.IOException;
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25 import java.lang.ref.Reference;
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26 import java.lang.ref.ReferenceQueue;
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27 import java.lang.ref.SoftReference;
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28 import java.util.ArrayList;
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29 import java.util.List;
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30 import java.util.zip.Inflater;
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32 import org.tmatesoft.hg.core.HgIOException;
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33 import org.tmatesoft.hg.core.Nodeid;
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34 import org.tmatesoft.hg.repo.HgInternals;
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35 import org.tmatesoft.hg.repo.HgInvalidControlFileException;
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36 import org.tmatesoft.hg.repo.HgInvalidRevisionException;
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37 import org.tmatesoft.hg.repo.HgInvalidStateException;
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38 import org.tmatesoft.hg.repo.HgRepository;
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39 import org.tmatesoft.hg.util.Adaptable;
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42 /**
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43 * ? Single RevlogStream per file per repository with accessor to record access session (e.g. with back/forward operations),
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44 * or numerous RevlogStream with separate representation of the underlying data (cached, lazy ChunkStream)?
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45 *
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46 * @see http://mercurial.selenic.com/wiki/Revlog
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47 * @see http://mercurial.selenic.com/wiki/RevlogNG
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48 *
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49 * @author Artem Tikhomirov
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50 * @author TMate Software Ltd.
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51 */
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52 public class RevlogStream {
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54 static final int INLINEDATA = 1 << 16;
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56 /*
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57 * makes sense for index with inline data only - actual offset of the record in the .i file (record entry + revision * record size))
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58 *
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59 * long[] in fact (there are 8-bytes field in the revlog)
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60 * However, (a) DataAccess currently doesn't operate with long seek/length
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61 * and, of greater significance, (b) files with inlined data are designated for smaller files,
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62 * guess, about 130 Kb, and offset there won't ever break int capacity
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63 */
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64 private int[] indexRecordOffset;
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65 private int[] baseRevisions;
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66 private boolean inline = false;
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67 private final File indexFile;
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68 private File dataFile;
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69 private final Internals repo;
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70 // keeps last complete revision we've read. Note, this cached revision doesn't help
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71 // for subsequent #iterate() calls with the same revision (Inspector needs more data than
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72 // we currently cache here, perhaps, we shall cache everything it wants to cover same
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73 // revision case as well). Now this helps when second #iterate() call is for a revision greater
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74 // than one from the first call, and both revisions got same base rev. It's often the case when
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75 // parents/children are analyzed.
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76 private SoftReference<CachedRevision> lastRevisionRead;
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77 private final ReferenceQueue<CachedRevision> lastRevisionQueue = new ReferenceQueue<CachedRevision>();
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78 //
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79 private final RevlogChangeMonitor changeTracker;
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80 private List<Observer> observers;
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81 private boolean shallDropDerivedCaches = false;
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83 public RevlogStream(Internals hgRepo, File indexFile) {
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84 repo = hgRepo;
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85 this.indexFile = indexFile;
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86 changeTracker = repo.getRevlogTracker(indexFile);
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87 }
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89 /**
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90 * @param shortRead pass <code>true</code> to indicate intention to read few revisions only (as opposed to reading most of/complete revlog)
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91 * @return never <code>null</code>, empty {@link DataAccess} if no stream is available
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92 */
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93 /*package*/ DataAccess getIndexStream(boolean shortRead) {
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94 // shortRead hint helps to avoid mmap files when only
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95 // few bytes are to be read (i.e. #dataLength())
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96 DataAccessProvider dataAccess = repo.getDataAccess();
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97 return dataAccess.createReader(indexFile, shortRead);
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98 }
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99
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100 /*package*/ DataAccess getDataStream() {
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101 DataAccessProvider dataAccess = repo.getDataAccess();
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102 return dataAccess.createReader(getDataFile(), false);
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103 }
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105 /*package*/ DataSerializer getIndexStreamWriter(Transaction tr) throws HgIOException {
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106 DataAccessProvider dataAccess = repo.getDataAccess();
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107 return dataAccess.createWriter(tr, indexFile, true);
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108 }
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110 /*package*/ DataSerializer getDataStreamWriter(Transaction tr) throws HgIOException {
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111 DataAccessProvider dataAccess = repo.getDataAccess();
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112 return dataAccess.createWriter(tr, getDataFile(), true);
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113 }
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115 /**
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116 * Constructs file object that corresponds to .d revlog counterpart.
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117 * Note, it's caller responsibility to ensure this file makes any sense (i.e. check {@link #inline} attribute)
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118 */
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119 private File getDataFile() {
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120 if (dataFile == null) {
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121 final String indexName = indexFile.getName();
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122 dataFile = new File(indexFile.getParentFile(), indexName.substring(0, indexName.length() - 1) + "d");
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123 }
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124 return dataFile;
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125 }
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126
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127 // initialize exception with the file where revlog structure information comes from
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128 public HgInvalidControlFileException initWithIndexFile(HgInvalidControlFileException ex) {
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129 return ex.setFile(indexFile);
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130 }
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131
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132 // initialize exception with the file where revlog data comes from
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133 public HgInvalidControlFileException initWithDataFile(HgInvalidControlFileException ex) {
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134 // exceptions are usually raised after read attepmt, hence inline shall be initialized
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135 // although honest approach is to call #initOutline() first
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136 return ex.setFile(inline ? indexFile : getDataFile());
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137 }
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138
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139 /*package-private*/String getDataFileName() {
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140 // XXX a temporary solution to provide more info to fill in exceptions other than
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141 // HgInvalidControlFileException (those benefit from initWith* methods above)
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142 //
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143 // Besides, since RevlogStream represents both revlogs with user data (those with WC representative and
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144 // system data under store/data) and system-only revlogs (like changelog and manifest), there's no
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145 // easy way to supply human-friendly name of the active file (independent from whether it's index of data)
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146 return inline ? indexFile.getPath() : getDataFile().getPath();
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147 }
396
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148
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149 public boolean isInlineData() {
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150 initOutline();
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151 return inline;
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152 }
396
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153
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154 public int revisionCount() {
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155 initOutline();
198
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156 return baseRevisions.length;
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157 }
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158
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159 /**
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160 * @throws HgInvalidControlFileException if attempt to read index file failed
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161 * @throws HgInvalidRevisionException if revisionIndex argument doesn't represent a valid record in the revlog
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162 */
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163 public int dataLength(int revisionIndex) throws HgInvalidControlFileException, HgInvalidRevisionException {
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164 // XXX in fact, use of iterate() instead of this implementation may be quite reasonable.
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165 //
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166 revisionIndex = checkRevisionIndex(revisionIndex);
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167 DataAccess daIndex = getIndexStream(true);
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168 try {
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169 int recordOffset = getIndexOffsetInt(revisionIndex);
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170 daIndex.seek(recordOffset + 12); // 6+2+4
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171 int actualLen = daIndex.readInt();
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172 return actualLen;
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173 } catch (IOException ex) {
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174 throw new HgInvalidControlFileException(null, ex, indexFile).setRevisionIndex(revisionIndex);
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175 } finally {
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176 daIndex.done();
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177 }
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178 }
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179
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180 /**
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181 * Read nodeid at given index
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182 *
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183 * @throws HgInvalidControlFileException if attempt to read index file failed
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184 * @throws HgInvalidRevisionException if revisionIndex argument doesn't represent a valid record in the revlog
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185 */
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186 public byte[] nodeid(int revisionIndex) throws HgInvalidControlFileException, HgInvalidRevisionException {
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187 revisionIndex = checkRevisionIndex(revisionIndex);
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188 DataAccess daIndex = getIndexStream(true);
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189 try {
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190 int recordOffset = getIndexOffsetInt(revisionIndex);
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191 daIndex.seek(recordOffset + 32);
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192 byte[] rv = new byte[20];
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193 daIndex.readBytes(rv, 0, 20);
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194 return rv;
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195 } catch (IOException ex) {
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196 throw new HgInvalidControlFileException("Revision lookup failed", ex, indexFile).setRevisionIndex(revisionIndex);
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197 } finally {
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198 daIndex.done();
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199 }
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200 }
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201
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202 /**
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203 * Get link field from the index record.
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204 *
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205 * @throws HgInvalidControlFileException if attempt to read index file failed
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206 * @throws HgInvalidRevisionException if revisionIndex argument doesn't represent a valid record in the revlog
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207 */
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208 public int linkRevision(int revisionIndex) throws HgInvalidControlFileException, HgInvalidRevisionException {
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209 revisionIndex = checkRevisionIndex(revisionIndex);
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210 DataAccess daIndex = getIndexStream(true);
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211 try {
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212 int recordOffset = getIndexOffsetInt(revisionIndex);
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213 daIndex.seek(recordOffset + 20);
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214 int linkRev = daIndex.readInt();
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215 return linkRev;
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216 } catch (IOException ex) {
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217 throw new HgInvalidControlFileException("Linked revision lookup failed", ex, indexFile).setRevisionIndex(revisionIndex);
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218 } finally {
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219 daIndex.done();
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220 }
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221 }
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222
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223 /**
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224 * Extract base revision field from the revlog
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225 *
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226 * @throws HgInvalidControlFileException if attempt to read index file failed
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227 * @throws HgInvalidRevisionException if revisionIndex argument doesn't represent a valid record in the revlog
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228 */
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229 public int baseRevision(int revisionIndex) throws HgInvalidControlFileException, HgInvalidRevisionException {
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230 revisionIndex = checkRevisionIndex(revisionIndex);
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231 return getBaseRevision(revisionIndex);
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232 }
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233
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234 // Perhaps, RevlogStream should be limited to use of plain int revisions for access,
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235 // while Nodeids should be kept on the level up, in Revlog. Guess, Revlog better keep
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236 // map of nodeids, and once this comes true, we may get rid of this method.
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237 // Unlike its counterpart, {@link Revlog#getLocalRevisionNumber()}, doesn't fail with exception if node not found,
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238 /**
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239 * @return integer in [0..revisionCount()) or {@link HgRepository#BAD_REVISION} if not found
354
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240 * @throws HgInvalidControlFileException if attempt to read index file failed
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241 */
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242 public int findRevisionIndex(Nodeid nodeid) throws HgInvalidControlFileException {
22
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243 // XXX this one may be implemented with iterate() once there's mechanism to stop iterations
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244 final int indexSize = revisionCount();
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245 DataAccess daIndex = getIndexStream(false);
22
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246 try {
24
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247 byte[] nodeidBuf = new byte[20];
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248 for (int i = 0; i < indexSize; i++) {
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249 daIndex.skip(8);
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250 int compressedLen = daIndex.readInt();
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251 daIndex.skip(20);
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252 daIndex.readBytes(nodeidBuf, 0, 20);
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253 if (nodeid.equalsTo(nodeidBuf)) {
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254 return i;
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255 }
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256 daIndex.skip(inline ? 12 + compressedLen : 12);
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257 }
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258 } catch (IOException ex) {
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259 throw new HgInvalidControlFileException("Revision lookup failed", ex, indexFile).setRevision(nodeid);
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260 } finally {
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261 daIndex.done();
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262 }
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263 return BAD_REVISION;
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264 }
538
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265
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266 /**
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267 * @return value suitable for the corresponding field in the new revision's header, not physical offset in the file
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268 * (which is different in case of inline revlogs)
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269 */
538
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270 public long newEntryOffset() {
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271 if (revisionCount() == 0) {
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272 return 0;
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273 }
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274 DataAccess daIndex = getIndexStream(true);
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275 int lastRev = revisionCount() - 1;
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276 try {
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277 int recordOffset = getIndexOffsetInt(lastRev);
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278 daIndex.seek(recordOffset);
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279 long value = daIndex.readLong();
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280 value = value >>> 16;
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281 int compressedLen = daIndex.readInt();
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282 return lastRev == 0 ? compressedLen : value + compressedLen;
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283 } catch (IOException ex) {
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284 throw new HgInvalidControlFileException("Linked revision lookup failed", ex, indexFile).setRevisionIndex(lastRev);
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285 } finally {
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286 daIndex.done();
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287 }
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288 }
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289
3
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290 // should be possible to use TIP, ALL, or -1, -2, -n notation of Hg
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291 // ? boolean needsNodeid
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292 public void iterate(int start, int end, boolean needData, Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException {
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293 initOutline();
198
33a7d76f067b Performance optimization: reduce memory to keep revlog cached info
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294 final int indexSize = revisionCount();
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295 if (indexSize == 0) {
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296 return;
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297 }
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298 if (end == TIP) {
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299 end = indexSize - 1;
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300 }
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301 if (start == TIP) {
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302 start = indexSize - 1;
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303 }
300
650b45d290b1 Share range check code
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304 HgInternals.checkRevlogRange(start, end, indexSize-1);
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305 // XXX may cache [start .. end] from index with a single read (pre-read)
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306
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diff changeset
307 ReaderN1 r = new ReaderN1(needData, inspector, repo.shallMergePatches());
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308 try {
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309 r.start(end - start + 1, getLastRevisionRead());
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310 r.range(start, end);
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diff changeset
311 } catch (IOException ex) {
366
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312 throw new HgInvalidControlFileException(String.format("Failed reading [%d..%d]", start, end), ex, indexFile);
242
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313 } finally {
593
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314 CachedRevision cr = r.finish();
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diff changeset
315 setLastRevisionRead(cr);
242
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316 }
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diff changeset
317 }
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318
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319 /**
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320 * Effective alternative to {@link #iterate(int, int, boolean, Inspector) batch read}, when only few selected
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321 * revisions are of interest.
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322 * @param sortedRevisions revisions to walk, in ascending order.
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323 * @param needData whether inspector needs access to header only
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324 * @param inspector callback to process entries
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325 */
366
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326 public void iterate(int[] sortedRevisions, boolean needData, Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException /*REVISIT - too general exception*/ {
242
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327 final int indexSize = revisionCount();
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328 if (indexSize == 0 || sortedRevisions.length == 0) {
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diff changeset
329 return;
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diff changeset
330 }
347
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diff changeset
331 if (sortedRevisions[0] > indexSize) {
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332 throw new HgInvalidRevisionException(String.format("Can't iterate [%d, %d] in range [0..%d]", sortedRevisions[0], sortedRevisions[sortedRevisions.length - 1], indexSize), null, sortedRevisions[0]);
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diff changeset
333 }
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diff changeset
334 if (sortedRevisions[sortedRevisions.length - 1] > indexSize) {
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335 throw new HgInvalidRevisionException(String.format("Can't iterate [%d, %d] in range [0..%d]", sortedRevisions[0], sortedRevisions[sortedRevisions.length - 1], indexSize), null, sortedRevisions[sortedRevisions.length - 1]);
242
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diff changeset
336 }
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diff changeset
337
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diff changeset
338 ReaderN1 r = new ReaderN1(needData, inspector, repo.shallMergePatches());
242
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diff changeset
339 try {
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cc7b0c4dc993 Cache only in-memory revision representations
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340 r.start(sortedRevisions.length, getLastRevisionRead());
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341 for (int i = 0; i < sortedRevisions.length; ) {
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342 int x = i;
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343 i++;
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344 while (i < sortedRevisions.length) {
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345 if (sortedRevisions[i] == sortedRevisions[i-1] + 1) {
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346 i++;
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diff changeset
347 } else {
217
e39cf474ef94 Experimental support to mix-in start and end events for inspectors. Additionally, Lifecycle may serve as iteration control
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348 break;
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349 }
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diff changeset
350 }
242
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351 // commitRevisions[x..i-1] are sequential
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352 if (!r.range(sortedRevisions[x], sortedRevisions[i-1])) {
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diff changeset
353 return;
51
9429c7bd1920 Try DataAccess to reach revision data instead of plain byte arrays
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parents: 49
diff changeset
354 }
2
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diff changeset
355 }
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diff changeset
356 } catch (IOException ex) {
366
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357 final int c = sortedRevisions.length;
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358 throw new HgInvalidControlFileException(String.format("Failed reading %d revisions in [%d; %d]", c, sortedRevisions[0], sortedRevisions[c-1]), ex, indexFile);
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359 } finally {
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360 CachedRevision cr = r.finish();
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361 setLastRevisionRead(cr);
2
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362 }
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363 }
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364
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365 public void attach(Observer listener) {
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366 assert listener != null;
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367 if (observers == null) {
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368 observers = new ArrayList<Observer>(3);
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369 }
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370 observers.add(listener);
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371 }
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372
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373 public void detach(Observer listener) {
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374 assert listener != null;
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375 if (observers != null) {
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376 observers.remove(listener);
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377 }
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378 }
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379
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380 /*
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381 * Note, this method IS NOT a replacement for Observer. It has to be invoked when the validity of any
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382 * cache built using revision information is in doubt, but it provides reasonable value only till the
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383 * first initOutline() to be invoked, i.e. in [change..revlog read operation] time frame. If your code
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384 * accesses cached information without any prior explicit read operation, you shall consult this method
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385 * if next read operation would in fact bring changed content.
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386 * Observer is needed in addition to this method because any revlog read operation (e.g. Revlog#getLastRevision)
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387 * would clear shallDropDerivedCaches(), and if code relies only on this method to clear its derived caches,
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388 * it would miss the update.
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389 */
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390 public boolean shallDropDerivedCaches() {
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391 if (shallDropDerivedCaches) {
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392 return shallDropDerivedCaches;
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393 }
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394 return shallDropDerivedCaches = changeTracker.hasChanged(indexFile);
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395 }
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396
539
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397 void revisionAdded(int revisionIndex, Nodeid revision, int baseRevisionIndex, long revisionOffset) throws HgInvalidControlFileException {
607
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398 shallDropDerivedCaches = true;
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399 if (!outlineCached()) {
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400 return;
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401 }
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402 if (baseRevisions.length != revisionIndex) {
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403 throw new HgInvalidControlFileException(String.format("New entry's index shall be %d, not %d", baseRevisions.length, revisionIndex), null, indexFile);
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404 }
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405 if (baseRevisionIndex < 0 || baseRevisionIndex > baseRevisions.length) {
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406 // baseRevisionIndex MAY be == to baseRevisions.length, it's when new revision is based on itself
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407 throw new HgInvalidControlFileException(String.format("Base revision index %d doesn't fit [0..%d] range", baseRevisionIndex, baseRevisions.length), null, indexFile);
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408 }
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409 assert revision != null;
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410 assert !revision.isNull();
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411 int[] baseRevisionsCopy = new int[baseRevisions.length + 1];
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412 System.arraycopy(baseRevisions, 0, baseRevisionsCopy, 0, baseRevisions.length);
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413 baseRevisionsCopy[baseRevisions.length] = baseRevisionIndex;
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414 baseRevisions = baseRevisionsCopy;
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415 if (inline && indexRecordOffset != null) {
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416 assert indexRecordOffset.length == revisionIndex;
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417 int[] indexRecordOffsetCopy = new int[indexRecordOffset.length + 1];
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6ca3d0c5b4bc Commit: tests and fixes for defects discovered
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418 System.arraycopy(indexRecordOffset, 0, indexRecordOffsetCopy, 0, indexRecordOffset.length);
539
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419 indexRecordOffsetCopy[indexRecordOffset.length] = offsetFieldToInlineFileOffset(revisionOffset, revisionIndex);
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420 indexRecordOffset = indexRecordOffsetCopy;
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421 }
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422 }
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423
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424 private int getBaseRevision(int revision) {
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425 return baseRevisions[revision];
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426 }
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427
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428 /**
354
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429 * @param revisionIndex shall be valid index, [0..baseRevisions.length-1].
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430 * It's advised to use {@link #checkRevisionIndex(int)} to ensure argument is correct.
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431 * @return offset of the revision's record in the index (.i) stream
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432 */
354
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433 private int getIndexOffsetInt(int revisionIndex) {
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434 return inline ? indexRecordOffset[revisionIndex] : revisionIndex * REVLOGV1_RECORD_SIZE;
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435 }
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436
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437 private int checkRevisionIndex(int revisionIndex) throws HgInvalidRevisionException {
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438 final int last = revisionCount() - 1;
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439 if (revisionIndex == TIP) {
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440 revisionIndex = last;
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441 }
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442 if (revisionIndex < 0 || revisionIndex > last) {
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443 throw new HgInvalidRevisionException(revisionIndex).setRevisionIndex(revisionIndex, 0, last);
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444 }
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445 return revisionIndex;
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446 }
539
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447
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448 private boolean outlineCached() {
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449 return baseRevisions != null && baseRevisions.length > 0;
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450 }
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451
584
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
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452 // translate 6-byte offset field value to physical file offset for inline revlogs
539
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453 // DOESN'T MAKE SENSE if revlog with data is separate
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454 private static int offsetFieldToInlineFileOffset(long offset, int recordIndex) throws HgInvalidStateException {
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455 int o = Internals.ltoi(offset);
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456 if (o != offset) {
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457 // just in case, can't happen, ever, unless HG (or some other bad tool) produces index file
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458 // with inlined data of size greater than 2 Gb.
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459 throw new HgInvalidStateException("Data too big, offset didn't fit to sizeof(int)");
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460 }
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diff changeset
461 return o + REVLOGV1_RECORD_SIZE * recordIndex;
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462 }
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463
607
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diff changeset
464 // every access to index revlog goes after this method only.
425
48f993aa2f41 FIXMEs: exceptions, javadoc
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diff changeset
465 private void initOutline() throws HgInvalidControlFileException {
607
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diff changeset
466 // true to send out 'drop-your-caches' event after outline has been built
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diff changeset
467 final boolean notifyReload;
539
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468 if (outlineCached()) {
607
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diff changeset
469 if (!changeTracker.hasChanged(indexFile)) {
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diff changeset
470 return;
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diff changeset
471 }
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diff changeset
472 notifyReload = true;
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473 } else {
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diff changeset
474 // no cached outline - inital read, do not send any reload/invalidate notifications
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diff changeset
475 notifyReload = false;
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diff changeset
476 }
607
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diff changeset
477 changeTracker.touch(indexFile);
606
5daa42067e7c Avoid mmap files when only few bytes are to be read
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diff changeset
478 DataAccess da = getIndexStream(false);
2
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diff changeset
479 try {
202
706bcc7cfee4 Basic test for HgIncomingCommand. Fix RepositoryComparator for cases when whole repository is unknown. Respect freshly initialized (empty) repositories in general.
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diff changeset
480 if (da.isEmpty()) {
706bcc7cfee4 Basic test for HgIncomingCommand. Fix RepositoryComparator for cases when whole repository is unknown. Respect freshly initialized (empty) repositories in general.
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parents: 198
diff changeset
481 // do not fail with exception if stream is empty, it's likely intentional
706bcc7cfee4 Basic test for HgIncomingCommand. Fix RepositoryComparator for cases when whole repository is unknown. Respect freshly initialized (empty) repositories in general.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 198
diff changeset
482 baseRevisions = new int[0];
539
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
483 // empty revlog, likely to be populated, indicate we start with a single file
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
484 inline = true;
202
706bcc7cfee4 Basic test for HgIncomingCommand. Fix RepositoryComparator for cases when whole repository is unknown. Respect freshly initialized (empty) repositories in general.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 198
diff changeset
485 return;
706bcc7cfee4 Basic test for HgIncomingCommand. Fix RepositoryComparator for cases when whole repository is unknown. Respect freshly initialized (empty) repositories in general.
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 198
diff changeset
486 }
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
487 int versionField = da.readInt();
170
71ddbf8603e8 Initial clone: populate given directory from a bundle. Everything but remote server access is there, albeit prototype code style
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 158
diff changeset
488 da.readInt(); // just to skip next 4 bytes of offset + flags
2
08db726a0fb7 Shaping out low-level Hg structures
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parents: 0
diff changeset
489 inline = (versionField & INLINEDATA) != 0;
288
b11f6a08f748 Avoid boxing int values and list resizes on revlog read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 280
diff changeset
490 IntVector resBases, resOffsets = null;
420
6c22bdc0bdfd Respect long offsets in revlogs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 398
diff changeset
491 int entryCountGuess = Internals.ltoi(da.longLength() / REVLOGV1_RECORD_SIZE);
288
b11f6a08f748 Avoid boxing int values and list resizes on revlog read
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parents: 280
diff changeset
492 if (inline) {
b11f6a08f748 Avoid boxing int values and list resizes on revlog read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 280
diff changeset
493 entryCountGuess >>>= 2; // pure guess, assume useful data takes 3/4 of total space
b11f6a08f748 Avoid boxing int values and list resizes on revlog read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 280
diff changeset
494 resOffsets = new IntVector(entryCountGuess, 5000);
b11f6a08f748 Avoid boxing int values and list resizes on revlog read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 280
diff changeset
495 }
b11f6a08f748 Avoid boxing int values and list resizes on revlog read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 280
diff changeset
496 resBases = new IntVector(entryCountGuess, 5000);
b11f6a08f748 Avoid boxing int values and list resizes on revlog read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 280
diff changeset
497
2
08db726a0fb7 Shaping out low-level Hg structures
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parents: 0
diff changeset
498 long offset = 0; // first offset is always 0, thus Hg uses it for other purposes
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
499 while(true) {
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
500 int compressedLen = da.readInt();
5
fc265ddeab26 File content and non-effective, although working, patch application
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 4
diff changeset
501 // 8+4 = 12 bytes total read here
49
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 44
diff changeset
502 @SuppressWarnings("unused")
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
503 int actualLen = da.readInt();
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
504 int baseRevision = da.readInt();
5
fc265ddeab26 File content and non-effective, although working, patch application
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 4
diff changeset
505 // 12 + 8 = 20 bytes read here
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
506 // int linkRevision = di.readInt();
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
507 // int parent1Revision = di.readInt();
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
508 // int parent2Revision = di.readInt();
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
509 // byte[] nodeid = new byte[32];
198
33a7d76f067b Performance optimization: reduce memory to keep revlog cached info
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 170
diff changeset
510 resBases.add(baseRevision);
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
511 if (inline) {
539
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
512 int o = offsetFieldToInlineFileOffset(offset, resOffsets.size());
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
513 resOffsets.add(o);
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
514 da.skip(3*4 + 32 + compressedLen); // Check: 44 (skip) + 20 (read) = 64 (total RevlogNG record size)
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
515 } else {
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
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parents: 6
diff changeset
516 da.skip(3*4 + 32);
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
517 }
10
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 9
diff changeset
518 if (da.isEmpty()) {
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
519 // fine, done then
288
b11f6a08f748 Avoid boxing int values and list resizes on revlog read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 280
diff changeset
520 baseRevisions = resBases.toArray(true);
198
33a7d76f067b Performance optimization: reduce memory to keep revlog cached info
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 170
diff changeset
521 if (inline) {
288
b11f6a08f748 Avoid boxing int values and list resizes on revlog read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 280
diff changeset
522 indexRecordOffset = resOffsets.toArray(true);
198
33a7d76f067b Performance optimization: reduce memory to keep revlog cached info
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 170
diff changeset
523 }
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
524 break;
10
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 9
diff changeset
525 } else {
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 9
diff changeset
526 // start reading next record
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 9
diff changeset
527 long l = da.readLong();
382cfe9463db Dirstate parsing. DataAccess refactored to allow reuse and control over constants
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 9
diff changeset
528 offset = l >>> 16;
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
529 }
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
530 }
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
531 } catch (IOException ex) {
423
9c9c442b5f2e Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 420
diff changeset
532 throw new HgInvalidControlFileException("Failed to analyze revlog index", ex, indexFile);
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
533 } finally {
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
534 da.done();
607
66f1cc23b906 Refresh revlogs if a change to a file has been detected; do not force reload of the whole repository
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 606
diff changeset
535 if (notifyReload && observers != null) {
66f1cc23b906 Refresh revlogs if a change to a file has been detected; do not force reload of the whole repository
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 606
diff changeset
536 for (Observer l : observers) {
66f1cc23b906 Refresh revlogs if a change to a file has been detected; do not force reload of the whole repository
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 606
diff changeset
537 l.reloaded(this);
66f1cc23b906 Refresh revlogs if a change to a file has been detected; do not force reload of the whole repository
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 606
diff changeset
538 }
66f1cc23b906 Refresh revlogs if a change to a file has been detected; do not force reload of the whole repository
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 606
diff changeset
539 shallDropDerivedCaches = false;
66f1cc23b906 Refresh revlogs if a change to a file has been detected; do not force reload of the whole repository
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 606
diff changeset
540 }
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
541 }
3
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
542 }
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
543
593
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
544 private CachedRevision getLastRevisionRead() {
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
545 return lastRevisionRead == null ? null : lastRevisionRead.get();
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
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parents: 585
diff changeset
546 }
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
547
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
548 private void setLastRevisionRead(CachedRevision cr) {
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
549 // done() for lastRevisionRead.userData has been called by ReaderN1 once
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
550 // it noticed unsuitable DataAccess.
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
551 // Now, done() for any CachedRevision cleared by GC:
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
552 for (Reference<? extends CachedRevision> r; (r = lastRevisionQueue.poll()) != null;) {
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
553 CachedRevision toClean = r.get();
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
554 if (toClean != null && toClean.userData != null) {
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
555 toClean.userData.done();
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
556 }
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
557 }
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
558 if (cr != null) {
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
559 lastRevisionRead = new SoftReference<CachedRevision>(cr, lastRevisionQueue);
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
560 } else {
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
561 lastRevisionRead = null;
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
562 }
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
563 }
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
564
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
565 final static class CachedRevision {
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
566 final int revision;
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
567 final DataAccess userData;
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
568
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
569 public CachedRevision(int lastRevisionRead, DataAccess lastUserData) {
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
570 revision = lastRevisionRead;
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
571 userData = lastUserData;
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
572 }
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
573 }
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 585
diff changeset
574
242
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
575 /**
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
576 * operation with single file open/close and multiple diverse reads.
366
189dc6dc1c3e Use exceptions to expose errors reading mercurial data
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 354
diff changeset
577 * XXX initOutline might need similar extraction to keep N1 format knowledge
242
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
578 */
584
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
579 final class ReaderN1 {
242
ad6a046943be Improved reading of sparse revisions from a revlog
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parents: 223
diff changeset
580 private final Inspector inspector;
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
581 private final boolean needData;
584
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
582 private final boolean mergePatches;
242
ad6a046943be Improved reading of sparse revisions from a revlog
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parents: 223
diff changeset
583 private DataAccess daIndex = null, daData = null;
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
584 private Lifecycle.BasicCallback cb = null;
520
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 440
diff changeset
585 private Lifecycle lifecycleListener = null;
242
ad6a046943be Improved reading of sparse revisions from a revlog
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parents: 223
diff changeset
586 private int lastRevisionRead = BAD_REVISION;
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
587 private DataAccess lastUserData;
584
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
588 //
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
589 // next are transient values, for range() use only
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
590 private final Inflater inflater = new Inflater();
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
591 // can share buffer between instances of InflaterDataAccess as I never read any two of them in parallel
608
e1b29756f901 Clean, organize and resolve some TODOs and FIXMEs: minor refactorings and comments
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 607
diff changeset
592 private final byte[] inflaterBuffer = new byte[10 * 1024]; // TODO [post-1.1] consider using DAP.DEFAULT_FILE_BUFFER
584
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
593 private final byte[] nodeidBuf = new byte[20];
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
594 // revlog record fields
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
595 private long offset;
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
596 @SuppressWarnings("unused")
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diff changeset
597 private int flags;
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diff changeset
598 private int compressedLen;
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diff changeset
599 private int actualLen;
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diff changeset
600 private int baseRevision;
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diff changeset
601 private int linkRevision;
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diff changeset
602 private int parent1Revision;
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diff changeset
603 private int parent2Revision;
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diff changeset
604
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diff changeset
605 public ReaderN1(boolean dataRequested, Inspector insp, boolean usePatchMerge) {
242
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diff changeset
606 assert insp != null;
584
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diff changeset
607 needData = dataRequested;
242
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diff changeset
608 inspector = insp;
584
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diff changeset
609 mergePatches = usePatchMerge;
242
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diff changeset
610 }
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diff changeset
611
593
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
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diff changeset
612 public void start(int totalWork, CachedRevision cachedRevision) {
606
5daa42067e7c Avoid mmap files when only few bytes are to be read
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parents: 594
diff changeset
613 daIndex = getIndexStream(totalWork <= 10);
242
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diff changeset
614 if (needData && !inline) {
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diff changeset
615 daData = getDataStream();
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diff changeset
616 }
520
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
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diff changeset
617 lifecycleListener = Adaptable.Factory.getAdapter(inspector, Lifecycle.class, null);
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
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diff changeset
618 if (lifecycleListener != null) {
242
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diff changeset
619 cb = new Lifecycle.BasicCallback();
520
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diff changeset
620 lifecycleListener.start(totalWork, cb, cb);
242
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621 }
593
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
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parents: 585
diff changeset
622 if (needData && cachedRevision != null) {
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
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parents: 585
diff changeset
623 lastUserData = cachedRevision.userData;
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
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parents: 585
diff changeset
624 lastRevisionRead = cachedRevision.revision;
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
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parents: 585
diff changeset
625 assert lastUserData != null;
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
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diff changeset
626 }
242
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diff changeset
627 }
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diff changeset
628
520
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
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parents: 440
diff changeset
629 // invoked only once per instance
593
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diff changeset
630 public CachedRevision finish() {
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
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diff changeset
631 CachedRevision rv = null;
242
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diff changeset
632 if (lastUserData != null) {
594
cc7b0c4dc993 Cache only in-memory revision representations
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parents: 593
diff changeset
633 if (lastUserData instanceof ByteArrayDataAccess) {
cc7b0c4dc993 Cache only in-memory revision representations
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parents: 593
diff changeset
634 // it's safe to cache only in-memory revision texts,
cc7b0c4dc993 Cache only in-memory revision representations
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parents: 593
diff changeset
635 // if lastUserData is merely a filter over file stream,
cc7b0c4dc993 Cache only in-memory revision representations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 593
diff changeset
636 // we'd need to keep file open, and this is bad.
cc7b0c4dc993 Cache only in-memory revision representations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 593
diff changeset
637 // XXX perhaps, wrap any DataAccess.byteArray into
cc7b0c4dc993 Cache only in-memory revision representations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 593
diff changeset
638 // ByteArrayDataAccess?
cc7b0c4dc993 Cache only in-memory revision representations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 593
diff changeset
639 rv = new CachedRevision(lastRevisionRead, lastUserData);
cc7b0c4dc993 Cache only in-memory revision representations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 593
diff changeset
640 } else {
cc7b0c4dc993 Cache only in-memory revision representations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 593
diff changeset
641 lastUserData.done();
cc7b0c4dc993 Cache only in-memory revision representations
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parents: 593
diff changeset
642 }
242
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diff changeset
643 lastUserData = null;
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diff changeset
644 }
520
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 440
diff changeset
645 if (lifecycleListener != null) {
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 440
diff changeset
646 lifecycleListener.finish(cb);
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
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parents: 440
diff changeset
647 lifecycleListener = null;
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 440
diff changeset
648 cb = null;
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
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diff changeset
649
242
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diff changeset
650 }
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diff changeset
651 daIndex.done();
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diff changeset
652 if (daData != null) {
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diff changeset
653 daData.done();
520
1ee452f31187 Experimental support for inverse direction history walking. Refactored/streamlined cancellation in HgLogCommand and down the stack
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diff changeset
654 daData = null;
242
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diff changeset
655 }
593
9619301a7bb9 Share last revision read between #iterate() invocations, to save revision rebuild efforts when few subsequent revisions are read
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diff changeset
656 return rv;
242
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diff changeset
657 }
584
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parents: 580
diff changeset
658
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diff changeset
659 private void readHeaderRecord(int i) throws IOException {
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parents: 580
diff changeset
660 if (inline && needData) {
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
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parents: 580
diff changeset
661 // inspector reading data (though FilterDataAccess) may have affected index position
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parents: 580
diff changeset
662 daIndex.seek(getIndexOffsetInt(i));
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parents: 580
diff changeset
663 }
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parents: 580
diff changeset
664 long l = daIndex.readLong(); // 0
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parents: 580
diff changeset
665 offset = i == 0 ? 0 : (l >>> 16);
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diff changeset
666 flags = (int) (l & 0x0FFFF);
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diff changeset
667 compressedLen = daIndex.readInt(); // +8
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diff changeset
668 actualLen = daIndex.readInt(); // +12
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diff changeset
669 baseRevision = daIndex.readInt(); // +16
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diff changeset
670 linkRevision = daIndex.readInt(); // +20
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parents: 580
diff changeset
671 parent1Revision = daIndex.readInt();
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parents: 580
diff changeset
672 parent2Revision = daIndex.readInt();
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parents: 580
diff changeset
673 // Hg has 32 bytes here, uses 20 for nodeid, and keeps 12 last bytes empty
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parents: 580
diff changeset
674 daIndex.readBytes(nodeidBuf, 0, 20); // +32
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diff changeset
675 daIndex.skip(12);
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diff changeset
676 }
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diff changeset
677
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parents: 580
diff changeset
678 private boolean isPatch(int i) {
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parents: 580
diff changeset
679 return baseRevision != i; // the only way I found to tell if it's a patch
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parents: 580
diff changeset
680 }
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diff changeset
681
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diff changeset
682 private DataAccess getStoredData(int i) throws IOException {
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diff changeset
683 DataAccess userDataAccess = null;
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diff changeset
684 DataAccess streamDataAccess;
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diff changeset
685 long streamOffset;
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parents: 580
diff changeset
686 if (inline) {
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diff changeset
687 streamOffset = getIndexOffsetInt(i) + REVLOGV1_RECORD_SIZE;
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diff changeset
688 streamDataAccess = daIndex;
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diff changeset
689 // don't need to do seek as it's actual position in the index stream, but it's safe to seek, just in case
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parents: 580
diff changeset
690 daIndex.longSeek(streamOffset);
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parents: 580
diff changeset
691 } else {
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diff changeset
692 streamOffset = offset;
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diff changeset
693 streamDataAccess = daData;
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diff changeset
694 daData.longSeek(streamOffset);
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parents: 580
diff changeset
695 }
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parents: 580
diff changeset
696 if (streamDataAccess.isEmpty() || compressedLen == 0) {
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diff changeset
697 userDataAccess = new DataAccess(); // empty
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parents: 580
diff changeset
698 } else {
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diff changeset
699 final byte firstByte = streamDataAccess.readByte();
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parents: 580
diff changeset
700 if (firstByte == 0x78 /* 'x' */) {
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diff changeset
701 inflater.reset();
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diff changeset
702 userDataAccess = new InflaterDataAccess(streamDataAccess, streamOffset, compressedLen, isPatch(i) ? -1 : actualLen, inflater, inflaterBuffer);
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diff changeset
703 } else if (firstByte == 0x75 /* 'u' */) {
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parents: 580
diff changeset
704 userDataAccess = new FilterDataAccess(streamDataAccess, streamOffset+1, compressedLen-1);
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parents: 580
diff changeset
705 } else {
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
706 // XXX Python impl in fact throws exception when there's not 'x', 'u' or '0' but I don't see reason not to return data as is
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parents: 580
diff changeset
707 //
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diff changeset
708 // although firstByte is already read from the streamDataAccess, FilterDataAccess#readByte would seek to
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
709 // initial offset before first attempt to read a byte
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diff changeset
710 userDataAccess = new FilterDataAccess(streamDataAccess, streamOffset, compressedLen);
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parents: 580
diff changeset
711 }
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parents: 580
diff changeset
712 }
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parents: 580
diff changeset
713 return userDataAccess;
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diff changeset
714 }
263
31f67be94e71 RevlogStream - reduce number of object instances, reuse when possible
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 258
diff changeset
715
520
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diff changeset
716 // may be invoked few times per instance life
423
9c9c442b5f2e Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
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parents: 420
diff changeset
717 public boolean range(int start, int end) throws IOException {
242
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diff changeset
718 int i;
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diff changeset
719 // it (i.e. replace with i >= start)
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diff changeset
720 if (needData && (i = getBaseRevision(start)) < start) {
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diff changeset
721 // if lastRevisionRead in [baseRevision(start), start) can reuse lastUserData
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parents: 223
diff changeset
722 // doesn't make sense to reuse if lastRevisionRead == start (too much to change in the cycle below).
ad6a046943be Improved reading of sparse revisions from a revlog
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parents: 223
diff changeset
723 if (lastRevisionRead != BAD_REVISION && i <= lastRevisionRead && lastRevisionRead < start) {
ad6a046943be Improved reading of sparse revisions from a revlog
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parents: 223
diff changeset
724 i = lastRevisionRead + 1; // start with first not-yet-read revision
ad6a046943be Improved reading of sparse revisions from a revlog
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parents: 223
diff changeset
725 } else {
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
726 if (lastUserData != null) {
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
727 lastUserData.done();
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
728 lastUserData = null;
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
729 }
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
730 }
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
731 } else {
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
732 // don't need to clean lastUserData as it's always null when !needData
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
733 i = start;
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
734 }
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
735
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
736 daIndex.seek(getIndexOffsetInt(i));
258
e5776067b3b8 Reduce number of objects instantiated on revlog read
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 243
diff changeset
737 //
584
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
738 // reuse instance, do not normalize it as patches from the stream are unlikely to need it
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
739 final Patch patch = new Patch(false);
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
740 //
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
741 if (needData && mergePatches && start-i > 2) {
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
742 // i+1 == start just reads lastUserData, i+2 == start applies one patch - not worth dedicated effort
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
743 Patch ultimatePatch = new Patch(true);
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
744 for ( ; i < start; i++) {
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
745 readHeaderRecord(i);
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
746 DataAccess userDataAccess = getStoredData(i);
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
747 if (lastUserData == null) {
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
748 assert !isPatch(i);
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
749 lastUserData = userDataAccess;
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
750 } else {
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
751 assert isPatch(i); // i < start and i == getBaseRevision()
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
752 patch.read(userDataAccess);
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
753 userDataAccess.done();
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
754 // I assume empty patches are applied ok
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
755 ultimatePatch = ultimatePatch.apply(patch);
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
756 patch.clear();
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
757 }
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
758 }
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
759 lastUserData.reset();
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
760 byte[] userData = ultimatePatch.apply(lastUserData, actualLen);
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
761 ultimatePatch.clear();
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
762 lastUserData.done();
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
763 lastUserData = new ByteArrayDataAccess(userData);
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
764 }
263
31f67be94e71 RevlogStream - reduce number of object instances, reuse when possible
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 258
diff changeset
765 //
242
ad6a046943be Improved reading of sparse revisions from a revlog
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parents: 223
diff changeset
766
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
767 for (; i <= end; i++ ) {
584
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
768 readHeaderRecord(i);
242
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
769 DataAccess userDataAccess = null;
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
770 if (needData) {
584
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
771 userDataAccess = getStoredData(i);
397
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
772 // userDataAccess is revision content, either complete revision, patch of a previous content, or an empty patch
584
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 580
diff changeset
773 if (isPatch(i)) {
242
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
774 // this is a patch
397
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
775 if (userDataAccess.isEmpty()) {
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
776 // Issue 22, empty patch to an empty base revision
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
777 // Issue 24, empty patch to non-empty base revision
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
778 // empty patch modifies nothing, use content of a previous revision (shall present - it's a patch here)
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
779 //
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
780 assert lastUserData.length() == actualLen; // with no patch, data size shall be the same
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
781 userDataAccess = lastUserData;
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
782 } else {
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
783 patch.read(userDataAccess);
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
784 userDataAccess.done();
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
785 //
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
786 // it shall be reset at the end of prev iteration, when it got assigned from userDataAccess
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
787 // however, actual userDataAccess and lastUserData may share Inflater object, which needs to be reset
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
788 // Alternatively, userDataAccess.done() above may be responsible to reset Inflater (if it's InflaterDataAccess)
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
789 lastUserData.reset();
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
790 // final long startMeasuring = System.currentTimeMillis(); // TIMING
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
791 byte[] userData = patch.apply(lastUserData, actualLen);
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
792 // applyTime += (System.currentTimeMillis() - startMeasuring); // TIMING
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
793 patch.clear(); // do not keep any reference, allow byte[] data to be gc'd
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
794 userDataAccess = new ByteArrayDataAccess(userData);
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
795 }
242
ad6a046943be Improved reading of sparse revisions from a revlog
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parents: 223
diff changeset
796 }
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
797 } else {
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
798 if (inline) {
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
799 daIndex.skip(compressedLen);
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
800 }
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
801 }
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 300
diff changeset
802 if (i >= start) {
264
6bb5e7ed051a Optimize memory usage (reduce number of objects instantiated) when pooling file names and nodeids during manifest parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 263
diff changeset
803 // final long startMeasuring = System.currentTimeMillis(); // TIMING
242
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
804 inspector.next(i, actualLen, baseRevision, linkRevision, parent1Revision, parent2Revision, nodeidBuf, userDataAccess);
264
6bb5e7ed051a Optimize memory usage (reduce number of objects instantiated) when pooling file names and nodeids during manifest parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 263
diff changeset
805 // inspectorTime += (System.currentTimeMillis() - startMeasuring); // TIMING
242
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
806 }
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
807 if (cb != null) {
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
808 if (cb.isStopped()) {
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
809 return false;
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
810 }
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
811 }
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
812 if (userDataAccess != null) {
263
31f67be94e71 RevlogStream - reduce number of object instances, reuse when possible
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 258
diff changeset
813 userDataAccess.reset(); // not sure this is necessary here, as lastUserData would get reset anyway before next use.
242
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
814 }
397
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
815 if (lastUserData != null && lastUserData != userDataAccess /* empty patch case, reuse of recent data in actual revision */) {
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
816 // release lastUserData only if we didn't reuse it in actual revision due to empty patch:
5e95b0da26f2 Issue 24: IAE, Underflow in FilterDataAccess. Issue 26:UnsupportedOperationException when patching empty base revision. Tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 377
diff changeset
817 // empty patch means we have previous revision and didn't alter it with a patch, hence use lastUserData for userDataAccess above
263
31f67be94e71 RevlogStream - reduce number of object instances, reuse when possible
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 258
diff changeset
818 lastUserData.done();
31f67be94e71 RevlogStream - reduce number of object instances, reuse when possible
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 258
diff changeset
819 }
31f67be94e71 RevlogStream - reduce number of object instances, reuse when possible
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 258
diff changeset
820 lastUserData = userDataAccess;
242
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
821 }
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
822 lastRevisionRead = end;
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
823 return true;
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
824 }
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
825 }
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
826
ad6a046943be Improved reading of sparse revisions from a revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 223
diff changeset
827
77
c677e1593919 Moved RevlogStream implementation into .internal
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
828 public interface Inspector {
608
e1b29756f901 Clean, organize and resolve some TODOs and FIXMEs: minor refactorings and comments
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 607
diff changeset
829 /**
e1b29756f901 Clean, organize and resolve some TODOs and FIXMEs: minor refactorings and comments
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 607
diff changeset
830 * XXX boolean retVal to indicate whether to continue?
e1b29756f901 Clean, organize and resolve some TODOs and FIXMEs: minor refactorings and comments
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 607
diff changeset
831 *
e1b29756f901 Clean, organize and resolve some TODOs and FIXMEs: minor refactorings and comments
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 607
diff changeset
832 * Implementers shall not invoke DataAccess.done(), it's accomplished by #iterate at appropriate moment
e1b29756f901 Clean, organize and resolve some TODOs and FIXMEs: minor refactorings and comments
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 607
diff changeset
833 *
e1b29756f901 Clean, organize and resolve some TODOs and FIXMEs: minor refactorings and comments
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 607
diff changeset
834 * @param revisionIndex absolute index of revision in revlog being iterated
e1b29756f901 Clean, organize and resolve some TODOs and FIXMEs: minor refactorings and comments
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 607
diff changeset
835 * @param actualLen length of the user data at this revision
e1b29756f901 Clean, organize and resolve some TODOs and FIXMEs: minor refactorings and comments
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 607
diff changeset
836 * @param baseRevision last revision known to hold complete revision (other hold patches).
e1b29756f901 Clean, organize and resolve some TODOs and FIXMEs: minor refactorings and comments
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 607
diff changeset
837 * if baseRevision != revisionIndex, data for this revision is a result of a sequence of patches
e1b29756f901 Clean, organize and resolve some TODOs and FIXMEs: minor refactorings and comments
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 607
diff changeset
838 * @param linkRevision index of corresponding changeset revision
e1b29756f901 Clean, organize and resolve some TODOs and FIXMEs: minor refactorings and comments
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
839 * @param parent1Revision index of first parent revision in this revlog, or {@link HgRepository#NO_REVISION}
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840 * @param parent2Revision index of second parent revision in this revlog, or {@link HgRepository#NO_REVISION}
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841 * @param nodeid 20-byte buffer, shared between invocations
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842 * @param data access to revision content of actualLen size, or <code>null</code> if no data has been requested with
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843 * {@link RevlogStream#iterate(int[], boolean, Inspector)}
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844 */
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845 void next(int revisionIndex, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[/*20*/] nodeid, DataAccess data);
3
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846 }
539
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847
607
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848 public interface Observer {
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849 // notify observer of invalidate/reload event in the stream
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850 public void reloaded(RevlogStream src);
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851 }
0
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852 }