annotate src/org/tmatesoft/hg/repo/HgManifest.java @ 583:47dfa0ec7e35

Effective revlog patching
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 24 Apr 2013 15:39:53 +0200
parents 88afffd39899
children c895b5556937 2f1cd1c26de5
rev   line source
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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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a3a2e5deb320 Updated contact address to support@hg4j.com
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.repo;
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18
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6952d9ce97f1 Handle missing manifest revision case (brought up with Issue 23), do my best to report missing manifests when walking few manifest revisions
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19 import static org.tmatesoft.hg.core.Nodeid.NULL;
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20 import static org.tmatesoft.hg.repo.HgRepository.*;
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21 import static org.tmatesoft.hg.util.LogFacility.Severity.Info;
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22
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23 import java.io.IOException;
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24 import java.util.ArrayList;
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25 import java.util.Arrays;
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26
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ccd7d25e5aea New and better name for HgFileInformer - HgChangesetFileSneaker. Explain (comments) ties between HgManifest, HgDataFile, HgChangesetFileSneaker and reasons for method placement
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27 import org.tmatesoft.hg.core.HgChangesetFileSneaker;
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28 import org.tmatesoft.hg.core.Nodeid;
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29 import org.tmatesoft.hg.internal.ByteVector;
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30 import org.tmatesoft.hg.internal.Callback;
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31 import org.tmatesoft.hg.internal.DataAccess;
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32 import org.tmatesoft.hg.internal.DigestHelper;
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33 import org.tmatesoft.hg.internal.EncodingHelper;
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34 import org.tmatesoft.hg.internal.IdentityPool;
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35 import org.tmatesoft.hg.internal.IntMap;
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36 import org.tmatesoft.hg.internal.IterateControlMediator;
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37 import org.tmatesoft.hg.internal.Lifecycle;
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38 import org.tmatesoft.hg.internal.RevlogStream;
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39 import org.tmatesoft.hg.util.CancelSupport;
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40 import org.tmatesoft.hg.util.LogFacility.Severity;
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41 import org.tmatesoft.hg.util.Path;
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42 import org.tmatesoft.hg.util.ProgressSupport;
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43
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44
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45 /**
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46 * Representation of Mercurial manifest file (list of file names and their revisions in a particular changeset)
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47 *
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48 * @see http://mercurial.selenic.com/wiki/Manifest
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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 final class HgManifest extends Revlog {
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53 private RevisionMapper revisionMap;
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54 private final EncodingHelper encodingHelper;
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55 private final Path.Source pathFactory;
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56
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57 /**
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58 * File flags recorded in manifest
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59 */
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60 public enum Flags {
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61 /**
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62 * Executable bit set
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63 */
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64 Exec,
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65 /**
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66 * Symbolic link
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67 */
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68 Link,
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69 /**
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70 * Regular file
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71 */
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72 RegularFile;
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73
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74 static Flags parse(String flags) {
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75 if ("x".equalsIgnoreCase(flags)) {
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76 return Exec;
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77 }
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78 if ("l".equalsIgnoreCase(flags)) {
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79 return Link;
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80 }
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81 if (flags == null) {
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82 return RegularFile;
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83 }
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84 throw new IllegalStateException(flags);
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85 }
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86
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87 static Flags parse(byte[] data, int start, int length) {
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88 if (length == 0) {
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89 return RegularFile;
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90 }
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91 if (length == 1) {
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92 if (data[start] == 'x') {
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93 return Exec;
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94 }
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95 if (data[start] == 'l') {
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96 return Link;
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97 }
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98 // FALL THROUGH
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99 }
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100 throw new IllegalStateException(new String(data, start, length));
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101 }
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102
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103 String nativeString() {
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104 if (this == Exec) {
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105 return "x";
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106 }
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107 if (this == Link) {
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108 return "l";
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109 }
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110 if (this == RegularFile) {
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111 return "";
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112 }
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113 throw new IllegalStateException(toString());
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114 }
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115
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116 public int fsMode() {
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117 if (this == Exec) {
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118 return 0755;
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119 }
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120 return 0644;
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121 }
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122 }
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123
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124 /*package-local*/ HgManifest(HgRepository hgRepo, RevlogStream content, EncodingHelper eh) {
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125 super(hgRepo, content);
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126 encodingHelper = eh;
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127 pathFactory = hgRepo.getSessionContext().getPathFactory();
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128 }
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129
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130 /**
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131 * Walks manifest revisions that correspond to specified range of changesets. The order in which manifest versions get reported
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132 * to the inspector corresponds to physical order of manifest revisions, not that of changesets (with few exceptions as noted below).
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133 * That is, for cset-manifest revision pairs:
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134 * <pre>
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135 * 3 8
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136 * 4 7
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137 * 5 9
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138 * </pre>
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139 * call <code>walk(3,5, insp)</code> would yield (4,7), (3,8) and (5,9) to the inspector;
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140 * different order of arguments, <code>walk(5, 3, insp)</code>, makes no difference.
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141 *
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142 * <p>Physical layout of mercurial files (revlog) doesn't impose any restriction on whether manifest and changeset revisions shall go
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143 * incrementally, nor it mandates presence of manifest version for a changeset. Thus, there might be changesets that record {@link Nodeid#NULL}
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144 * as corresponding manifest revision. This situation is deemed exceptional now and what would <code>inspector</code> get depends on whether
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145 * <code>start</code> or <code>end</code> arguments point to such changeset, or such changeset happen to be somewhere inside the range
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146 * <code>[start..end]</code>. Implementation does it best to report empty manifests
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147 * (<code>Inspector.begin(HgRepository.NO_REVISION, NULL, csetRevIndex);</code>
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148 * followed immediately by <code>Inspector.end(HgRepository.NO_REVISION)</code>
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149 * when <code>start</code> and/or <code>end</code> point to changeset with no associated
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150 * manifest revision. However, if changeset-manifest revision pairs look like:
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151 * <pre>
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152 * 3 8
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153 * 4 -1 (cset records null revision for manifest)
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154 * 5 9
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155 * </pre>
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156 * call <code>walk(3,5, insp)</code> would yield only (3,8) and (5,9) to the inspector, without additional empty
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157 * <code>Inspector.begin(); Inspector.end()</code> call pair.
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158 *
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159 * @see HgRepository#NO_REVISION
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160 * @param start changelog (not manifest!) revision to begin with
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161 * @param end changelog (not manifest!) revision to stop, inclusive.
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162 * @param inspector manifest revision visitor, can't be <code>null</code>
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163 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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164 * @throws IllegalArgumentException if inspector callback is <code>null</code>
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165 */
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166 public void walk(int start, int end, final Inspector inspector) throws HgRuntimeException, IllegalArgumentException {
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167 if (inspector == null) {
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168 throw new IllegalArgumentException();
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169 }
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170 final int csetFirst = start <= end ? start : end, csetLast = start > end ? start : end;
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171 int manifestFirst, manifestLast, i = 0;
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172 do {
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173 manifestFirst = fromChangelog(csetFirst+i);
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174 if (manifestFirst == BAD_REVISION) {
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175 inspector.begin(NO_REVISION, NULL, csetFirst+i);
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176 inspector.end(NO_REVISION);
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177 }
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178 i++;
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179 } while (manifestFirst == BAD_REVISION && csetFirst+i <= csetLast);
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180 if (manifestFirst == BAD_REVISION) {
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181 getRepo().getSessionContext().getLog().dump(getClass(), Info, "None of changesets [%d..%d] have associated manifest revision", csetFirst, csetLast);
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182 // we ran through all revisions in [start..end] and none of them had manifest.
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183 // we reported that to inspector and proceeding is done now.
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184 return;
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185 }
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186 i = 0;
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187 do {
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188 manifestLast = fromChangelog(csetLast-i);
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189 if (manifestLast == BAD_REVISION) {
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190 inspector.begin(NO_REVISION, NULL, csetLast-i);
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191 inspector.end(NO_REVISION);
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192 }
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193 i++;
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194 } while (manifestLast == BAD_REVISION && csetLast-i >= csetFirst);
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195 if (manifestLast == BAD_REVISION) {
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196 // hmm, manifestFirst != BAD_REVISION here, hence there's i from [csetFirst..csetLast] for which manifest entry exists,
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197 // and thus it's impossible to run into manifestLast == BAD_REVISION. Nevertheless, never hurts to check.
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198 throw new HgInvalidStateException(String.format("Manifest %d-%d(!) for cset range [%d..%d] ", manifestFirst, manifestLast, csetFirst, csetLast));
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199 }
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200 if (manifestLast < manifestFirst) {
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201 // there are tool-constructed repositories that got order of changeset revisions completely different from that of manifest
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202 int x = manifestLast;
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203 manifestLast = manifestFirst;
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204 manifestFirst = x;
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205 }
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206 content.iterate(manifestFirst, manifestLast, true, new ManifestParser(inspector));
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207 }
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208
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209 /**
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210 * "Sparse" iteration of the manifest, more effective than accessing revisions one by one.
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211 * <p> Inspector is invoked for each changeset revision supplied, even when there's no manifest
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212 * revision associated with a changeset (@see {@link #walk(int, int, Inspector)} for more details when it happens). Order inspector
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213 * gets invoked doesn't resemble order of changeset revisions supplied, manifest revisions are reported in the order they appear
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214 * in manifest revlog (with exception of changesets with missing manifest that may be reported in any order).
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215 *
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216 * @param inspector manifest revision visitor, can't be <code>null</code>
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217 * @param revisionIndexes local indexes of changesets to visit, non-<code>null</code>
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218 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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219 * @throws InvalidArgumentException if supplied arguments are <code>null</code>s
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220 */
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221 public void walk(final Inspector inspector, int... revisionIndexes) throws HgRuntimeException, IllegalArgumentException {
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222 if (inspector == null || revisionIndexes == null) {
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223 throw new IllegalArgumentException();
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224 }
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225 int[] manifestRevs = toManifestRevisionIndexes(revisionIndexes, inspector);
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226 content.iterate(manifestRevs, true, new ManifestParser(inspector));
254
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227 }
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228
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229 //
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230 /**
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231 * Tells manifest revision number that corresponds to the given changeset. May return {@link HgRepository#BAD_REVISION}
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232 * if changeset has no associated manifest (cset records NULL nodeid for manifest).
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233 * @return manifest revision index, non-negative, or {@link HgRepository#BAD_REVISION}.
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234 * @throws HgInvalidRevisionException if method argument specifies non-existent revision index
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235 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
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236 */
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237 /*package-local*/ int fromChangelog(int changesetRevisionIndex) throws HgInvalidRevisionException, HgInvalidControlFileException {
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238 if (HgInternals.wrongRevisionIndex(changesetRevisionIndex)) {
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239 throw new HgInvalidRevisionException(changesetRevisionIndex);
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240 }
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241 if (changesetRevisionIndex == HgRepository.WORKING_COPY || changesetRevisionIndex == HgRepository.BAD_REVISION) {
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242 throw new HgInvalidRevisionException("Can't use constants like WORKING_COPY or BAD_REVISION", null, changesetRevisionIndex);
257
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243 }
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244 // revisionNumber == TIP is processed by RevisionMapper
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245 if (revisionMap == null) {
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246 revisionMap = new RevisionMapper(getRepo());
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247 content.iterate(0, TIP, false, revisionMap);
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248 }
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249 return revisionMap.at(changesetRevisionIndex);
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250 }
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251
232
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252 /**
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253 * Extracts file revision as it was known at the time of given changeset.
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254 * <p>For more thorough details about file at specific changeset, use {@link HgChangesetFileSneaker}.
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255 * <p>To visit few changesets for the same file, use {@link #walkFileRevisions(Path, Inspector, int...)}
232
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256 *
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257 * @see #walkFileRevisions(Path, Inspector, int...)
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258 * @see HgChangesetFileSneaker
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259 * @param changelogRevisionIndex local changeset index
232
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260 * @param file path to file in question
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261 * @return file revision or <code>null</code> if manifest at specified revision doesn't list such file
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262 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
232
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263 */
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264 public Nodeid getFileRevision(int changelogRevisionIndex, final Path file) throws HgInvalidRevisionException, HgInvalidControlFileException {
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265 // there's no need for HgDataFile to own this method, or get a delegate
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266 // as most of HgDataFile API is using file revision indexes, and there's easy step from file revision index to
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267 // both file revision and changeset revision index. But there's no easy way to go from changesetRevisionIndex to
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268 // file revision (the task this method solves), except for HgFileInformer
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269 // I feel methods dealing with changeset indexes shall be more exposed in HgChangelog and HgManifest API.
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270 // TODO need tests (e.g. pass TIP here to see resMap.get(-1) doesn't fail)
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271 int manifestRevIndex = fromChangelog(changelogRevisionIndex);
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272 if (manifestRevIndex == BAD_REVISION) {
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273 return null;
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274 }
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275 IntMap<Nodeid> resMap = new IntMap<Nodeid>(3);
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276 FileLookupInspector parser = new FileLookupInspector(encodingHelper, file, resMap, null);
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277 parser.walk(manifestRevIndex, content);
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278 assert resMap.size() <= 1; // size() == 0 if file wasn't found
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279 // can't use changelogRevisionIndex as key - it might have been TIP
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280 return resMap.size() == 0 ? null : resMap.get(resMap.firstKey());
326
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281 }
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282
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283 /**
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284 * Visit file revisions as they were recorded at the time of given changesets. Same file revision may be reported as many times as
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285 * there are changesets that refer to that revision. Both {@link Inspector#begin(int, Nodeid, int)} and {@link Inspector#end(int)}
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286 * with appropriate values are invoked around {@link Inspector#next(Nodeid, Path, Flags)} call for the supplied file
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287 *
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288 * <p>NOTE, this method doesn't respect return values from callback (i.e. to stop iteration), as it's lookup of a single file
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289 * and canceling it seems superfluous. However, this may change in future and it's recommended to return <code>true</code> from
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290 * all {@link Inspector} methods.
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291 *
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292 * @see #getFileRevision(int, Path)
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293 * @param file path of interest
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294 * @param inspector callback to receive details about selected file
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295 * @param changelogRevisionIndexes changeset indexes to visit
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296 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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297 */
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298 public void walkFileRevisions(Path file, Inspector inspector, int... changelogRevisionIndexes) throws HgRuntimeException {
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299 if (file == null || inspector == null || changelogRevisionIndexes == null) {
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300 throw new IllegalArgumentException();
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301 }
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302 // TODO [post-1.0] need tests. There's Main#checkWalkFileRevisions that may be a starting point
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303 int[] manifestRevIndexes = toManifestRevisionIndexes(changelogRevisionIndexes, null);
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304 FileLookupInspector parser = new FileLookupInspector(encodingHelper, file, inspector);
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305 parser.walk(manifestRevIndexes, content);
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306 }
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307
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308 /**
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309 * Extract file {@link Flags flags} as they were recorded in appropriate manifest version.
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310 *
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311 * @see HgDataFile#getFlags(int)
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312 * @param changesetRevIndex changeset revision index
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313 * @param file path to look up
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314 * @return one of predefined enum values, or <code>null</code> if file was not known in the specified revision
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315 * @throws HgRuntimeException subclass thereof to indicate issues with the library. <em>Runtime exception</em>
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316 */
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317 public Flags getFileFlags(int changesetRevIndex, Path file) throws HgInvalidRevisionException, HgInvalidControlFileException {
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318 int manifestRevIdx = fromChangelog(changesetRevIndex);
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319 IntMap<Flags> resMap = new IntMap<Flags>(2);
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320 FileLookupInspector parser = new FileLookupInspector(encodingHelper, file, null, resMap);
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321 parser.walk(manifestRevIdx, content);
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322 assert resMap.size() <= 1; // size() == 0 if not found
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323 // can't use changesetRevIndex as key - it might have been TIP
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324 return resMap.size() == 0 ? null : resMap.get(resMap.firstKey());
415
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325 }
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326
326
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327
390
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328 /**
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329 * @param changelogRevisionIndexes non-null
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330 * @param inspector may be null if reporting of missing manifests is not needed
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331 * @throws HgInvalidRevisionException if arguments specify non-existent revision index
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332 * @throws IllegalArgumentException if any index argument is not a revision index
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333 * @throws HgInvalidControlFileException if access to revlog index/data entry failed
390
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334 */
403
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335 private int[] toManifestRevisionIndexes(int[] changelogRevisionIndexes, Inspector inspector) throws HgInvalidRevisionException, HgInvalidControlFileException {
368
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336 int[] manifestRevs = new int[changelogRevisionIndexes.length];
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337 boolean needsSort = false;
390
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338 int j = 0;
367
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339 for (int i = 0; i < changelogRevisionIndexes.length; i++) {
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340 final int manifestRevisionIndex = fromChangelog(changelogRevisionIndexes[i]);
403
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341 if (manifestRevisionIndex == BAD_REVISION) {
390
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342 if (inspector != null) {
423
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343 inspector.begin(NO_REVISION, NULL, changelogRevisionIndexes[i]);
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344 inspector.end(NO_REVISION);
390
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345 }
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346 // othrwise, ignore changeset without manifest
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347 } else {
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348 manifestRevs[j] = manifestRevisionIndex;
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349 if (j > 0 && manifestRevs[j-1] > manifestRevisionIndex) {
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350 needsSort = true;
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351 }
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352 j++;
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353 }
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354 }
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355 if (needsSort) {
390
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356 Arrays.sort(manifestRevs, 0, j);
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357 }
390
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358 if (j == manifestRevs.length) {
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359 return manifestRevs;
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360 } else {
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361 int[] rv = new int[j];
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362 //Arrays.copyOfRange
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363 System.arraycopy(manifestRevs, 0, rv, 0, j);
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364 return rv;
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365 }
326
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366 }
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367
423
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368 @Callback
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369 public interface Inspector {
285
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370 /**
537
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371 * Denotes entering specific manifest revision, separate entries are
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372 * reported with subsequence {@link #next(Nodeid, Path, Flags)} calls.
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373 *
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374 * @param manifestRevisionIndex local revision index of the inspected revision
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375 * @param manifestRevision revision of the manifest we're about to iterate through
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376 * @param changelogRevisionIndex local revision index of changelog this manifest points to
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377 * @return <code>true</code> to continue iteration, <code>false</code> to stop
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378 */
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379 boolean begin(int manifestRevisionIndex, Nodeid manifestRevision, int changelogRevisionIndex);
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380
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381
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382 /**
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383 * Reports each manifest entry
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384 *
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385 * @param nid file revision
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386 * @param fname file name
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387 * @param flags one of {@link HgManifest.Flags} constants, not <code>null</code>
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388 * @return <code>true</code> to continue iteration, <code>false</code> to stop
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389 */
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390 boolean next(Nodeid nid, Path fname, Flags flags);
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391
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392 /**
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393 * Denotes leaving specific manifest revision, after all entries were reported using {@link #next(Nodeid, Path, Flags)}
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394 *
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395 * @param manifestRevisionIndex indicates manifest revision, corresponds to opening {@link #begin(int, Nodeid, int)}
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396 * @return <code>true</code> to continue iteration, <code>false</code> to stop
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397 */
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398 boolean end(int manifestRevisionIndex);
267
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399 }
424
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400
268
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401 /**
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402 * When Pool uses Strings directly,
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403 * ManifestParser creates new String instance with new char[] value, and does byte->char conversion.
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404 * For cpython repo, walk(0..10k), there are over 16 million filenames, of them only 3020 unique.
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405 * This means there are 15.9 million useless char[] instances and byte->char conversions
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406 *
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407 * When String (Path) is wrapped into {@link PathProxy}, there's extra overhead of byte[] representation
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408 * of the String, but these are only for unique Strings (Paths) (3020 in the example above). Besides, I save
268
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409 * useless char[] and byte->char conversions.
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410 */
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411 private final class PathProxy {
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412 private byte[] data;
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413 private int start;
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414 private final int hash, length;
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415 private Path result;
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416
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417 public PathProxy(byte[] data, int start, int length) {
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418 this.data = data;
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419 this.start = start;
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420 this.length = length;
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421
268
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422 // copy from String.hashCode(). In fact, not necessarily match result of String(data).hashCode
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423 // just need some nice algorithm here
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424 int h = 0;
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425 byte[] d = data;
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426 for (int i = 0, off = start, len = length; i < len; i++) {
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427 h = 31 * h + d[off++];
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428 }
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429 hash = h;
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430 }
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431
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432 @Override
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433 public boolean equals(Object obj) {
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434 if (false == obj instanceof PathProxy) {
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435 return false;
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436 }
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437 PathProxy o = (PathProxy) obj;
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438 if (o.result != null && result != null) {
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439 return result.equals(o.result);
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diff changeset
440 }
268
c5980f287cc4 Use StringProxy when parsing manifest to minimize number of useless conversions and array instances
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parents: 267
diff changeset
441 if (o.length != length || o.hash != hash) {
267
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
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parents: 266
diff changeset
442 return false;
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 266
diff changeset
443 }
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 266
diff changeset
444 for (int i = 0, x = o.start, y = start; i < length; i++) {
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
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parents: 266
diff changeset
445 if (o.data[x++] != data[y++]) {
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 266
diff changeset
446 return false;
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
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parents: 266
diff changeset
447 }
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 266
diff changeset
448 }
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
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parents: 266
diff changeset
449 return true;
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 266
diff changeset
450 }
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 266
diff changeset
451 @Override
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
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parents: 266
diff changeset
452 public int hashCode() {
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
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parents: 266
diff changeset
453 return hash;
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 266
diff changeset
454 }
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 266
diff changeset
455
285
6dbbc53fc46d Use Path instead of plain String for manifest file names
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 268
diff changeset
456 public Path freeze() {
267
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
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parents: 266
diff changeset
457 if (result == null) {
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
458 Path.Source pf = HgManifest.this.pathFactory;
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
459 result = pf.path(HgManifest.this.encodingHelper.fromManifest(data, start, length));
268
c5980f287cc4 Use StringProxy when parsing manifest to minimize number of useless conversions and array instances
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parents: 267
diff changeset
460 // release reference to bigger data array, make a copy of relevant part only
285
6dbbc53fc46d Use Path instead of plain String for manifest file names
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parents: 268
diff changeset
461 // use original bytes, not those from String above to avoid cache misses due to different encodings
268
c5980f287cc4 Use StringProxy when parsing manifest to minimize number of useless conversions and array instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 267
diff changeset
462 byte[] d = new byte[length];
c5980f287cc4 Use StringProxy when parsing manifest to minimize number of useless conversions and array instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 267
diff changeset
463 System.arraycopy(data, start, d, 0, length);
c5980f287cc4 Use StringProxy when parsing manifest to minimize number of useless conversions and array instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 267
diff changeset
464 data = d;
c5980f287cc4 Use StringProxy when parsing manifest to minimize number of useless conversions and array instances
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parents: 267
diff changeset
465 start = 0;
267
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diff changeset
466 }
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parents: 266
diff changeset
467 return result;
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
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parents: 266
diff changeset
468 }
ec921ef0628e Revert manifest parser changes - no single string and back to HashMap Pool
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 266
diff changeset
469 }
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 157
diff changeset
470
571
e4ee4bf4c7d0 Let session context control creation of Path instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 550
diff changeset
471 private class ManifestParser implements RevlogStream.Inspector, Lifecycle {
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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parents: 157
diff changeset
472 private final Inspector inspector;
431
12f668401613 FIXMEs: awkward API refactored, what need to be internal got hidden; public aspects got captured in slim interfaces
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 426
diff changeset
473 private IdentityPool<Nodeid> nodeidPool, thisRevPool;
12f668401613 FIXMEs: awkward API refactored, what need to be internal got hidden; public aspects got captured in slim interfaces
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 426
diff changeset
474 private final IdentityPool<PathProxy> fnamePool;
266
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 264
diff changeset
475 private byte[] nodeidLookupBuffer = new byte[20]; // get reassigned each time new Nodeid is added to pool
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
476 private final ProgressSupport progressHelper;
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
477 private IterateControlMediator iterateControl;
262
3dcd3dd90c77 Improve manifest parsing: decode bytes to chars once, minimize arraycopy on String instantiation, keep set of file revisions from previous manifest only
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 257
diff changeset
478
571
e4ee4bf4c7d0 Let session context control creation of Path instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 550
diff changeset
479 public ManifestParser(Inspector delegate) {
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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parents: 157
diff changeset
480 assert delegate != null;
e2115da4cf6a Pool objects to avoid memory polution with duplicates
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 157
diff changeset
481 inspector = delegate;
431
12f668401613 FIXMEs: awkward API refactored, what need to be internal got hidden; public aspects got captured in slim interfaces
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 426
diff changeset
482 nodeidPool = new IdentityPool<Nodeid>();
12f668401613 FIXMEs: awkward API refactored, what need to be internal got hidden; public aspects got captured in slim interfaces
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 426
diff changeset
483 fnamePool = new IdentityPool<PathProxy>();
12f668401613 FIXMEs: awkward API refactored, what need to be internal got hidden; public aspects got captured in slim interfaces
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 426
diff changeset
484 thisRevPool = new IdentityPool<Nodeid>();
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
485 progressHelper = ProgressSupport.Factory.get(delegate);
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
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parents: 157
diff changeset
486 }
268
c5980f287cc4 Use StringProxy when parsing manifest to minimize number of useless conversions and array instances
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parents: 267
diff changeset
487
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: 421
diff changeset
488 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) {
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 157
diff changeset
489 try {
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
490 if (!inspector.begin(revisionNumber, new Nodeid(nodeid, true), linkRevision)) {
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
491 iterateControl.stop();
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
492 return;
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
493 }
372
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
494 if (!da.isEmpty()) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
495 // although unlikely, manifest entry may be empty, when all files have been deleted from the repository
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
496 Path fname = null;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
497 Flags flags = null;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
498 Nodeid nid = null;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
499 int i;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
500 byte[] data = da.byteArray();
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
501 for (i = 0; i < actualLen; i++) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
502 int x = i;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
503 for( ; data[i] != '\n' && i < actualLen; i++) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
504 if (fname == null && data[i] == 0) {
571
e4ee4bf4c7d0 Let session context control creation of Path instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 550
diff changeset
505 PathProxy px = fnamePool.unify(new PathProxy(data, x, i - x));
372
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
506 // if (cached = fnamePool.unify(px))== px then cacheMiss, else cacheHit
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
507 // cpython 0..10k: hits: 15 989 152, misses: 3020
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
508 fname = px.freeze();
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
509 x = i+1;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
510 }
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 157
diff changeset
511 }
372
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
512 if (i < actualLen) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
513 assert data[i] == '\n';
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
514 int nodeidLen = i - x < 40 ? i-x : 40; // if > 40, there are flags
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
515 DigestHelper.ascii2bin(data, x, nodeidLen, nodeidLookupBuffer); // ignore return value as it's unlikely to have NULL in manifest
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
516 nid = new Nodeid(nodeidLookupBuffer, false); // this Nodeid is for pool lookup only, mock object
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
517 Nodeid cached = nodeidPool.unify(nid);
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
518 if (cached == nid) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
519 // buffer now belongs to the cached nodeid
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
520 nodeidLookupBuffer = new byte[20];
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
521 } else {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
522 nid = cached; // use existing version, discard the lookup object
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
523 } // for cpython 0..10k, cache hits are 15 973 301, vs 18871 misses.
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
524 thisRevPool.record(nid); // memorize revision for the next iteration.
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
525 if (nodeidLen + x < i) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
526 // 'x' and 'l' for executable bits and symlinks?
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
527 // hg --debug manifest shows 644 for each regular file in my repo
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
528 // for cpython 0..10k, there are 4361062 flag checks, and there's only 1 unique flag
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
529 flags = Flags.parse(data, x + nodeidLen, i-x-nodeidLen);
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
530 } else {
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
531 flags = Flags.RegularFile;
372
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
532 }
424
6437d261048a Deprecated code removed
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 423
diff changeset
533 boolean good2go = inspector.next(nid, fname, flags);
372
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
534 if (!good2go) {
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
535 iterateControl.stop();
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
536 return;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
537 }
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
538 }
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
539 nid = null;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
540 fname = null;
155c1893bda4 Issue 22: UnsupportedOperationException on empty manifest entry
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 368
diff changeset
541 flags = null;
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 157
diff changeset
542 }
e2115da4cf6a Pool objects to avoid memory polution with duplicates
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 157
diff changeset
543 }
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
544 if (!inspector.end(revisionNumber)) {
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
545 iterateControl.stop();
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
546 return;
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
547 }
262
3dcd3dd90c77 Improve manifest parsing: decode bytes to chars once, minimize arraycopy on String instantiation, keep set of file revisions from previous manifest only
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 257
diff changeset
548 //
3dcd3dd90c77 Improve manifest parsing: decode bytes to chars once, minimize arraycopy on String instantiation, keep set of file revisions from previous manifest only
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 257
diff changeset
549 // keep only actual file revisions, found at this version
3dcd3dd90c77 Improve manifest parsing: decode bytes to chars once, minimize arraycopy on String instantiation, keep set of file revisions from previous manifest only
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 257
diff changeset
550 // (next manifest is likely to refer to most of them, although in specific cases
3dcd3dd90c77 Improve manifest parsing: decode bytes to chars once, minimize arraycopy on String instantiation, keep set of file revisions from previous manifest only
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 257
diff changeset
551 // like commit in another branch a lot may be useless)
3dcd3dd90c77 Improve manifest parsing: decode bytes to chars once, minimize arraycopy on String instantiation, keep set of file revisions from previous manifest only
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 257
diff changeset
552 nodeidPool.clear();
431
12f668401613 FIXMEs: awkward API refactored, what need to be internal got hidden; public aspects got captured in slim interfaces
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 426
diff changeset
553 IdentityPool<Nodeid> t = nodeidPool;
262
3dcd3dd90c77 Improve manifest parsing: decode bytes to chars once, minimize arraycopy on String instantiation, keep set of file revisions from previous manifest only
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 257
diff changeset
554 nodeidPool = thisRevPool;
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: 262
diff changeset
555 thisRevPool = t;
313
c1e3c18fd2f2 Test manifest cancellation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 312
diff changeset
556 iterateControl.checkCancelled();
312
f9f3e9b67ccc Facilitate cancellation and progress reporting in changelog and manifest iterations
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 304
diff changeset
557 progressHelper.worked(1);
196
e2115da4cf6a Pool objects to avoid memory polution with duplicates
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 157
diff changeset
558 } catch (IOException ex) {
423
9c9c442b5f2e Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
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559 throw new HgInvalidControlFileException("Failed reading manifest", ex, null).setRevisionIndex(revisionNumber);
196
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560 }
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561 }
312
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562
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563 public void start(int count, Callback callback, Object token) {
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564 CancelSupport cs = CancelSupport.Factory.get(inspector, null);
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565 iterateControl = new IterateControlMediator(cs, callback);
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diff changeset
566 progressHelper.start(count);
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567 }
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568
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diff changeset
569 public void finish(Object token) {
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diff changeset
570 progressHelper.done();
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571 }
196
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572 }
218
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573
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574 private static class RevisionMapper implements RevlogStream.Inspector, Lifecycle {
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575
403
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576 private final int changelogRevisionCount;
218
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577 private int[] changelog2manifest;
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578 private final HgRepository repo;
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579
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580 public RevisionMapper(HgRepository hgRepo) {
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581 repo = hgRepo;
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582 changelogRevisionCount = repo.getChangelog().getRevisionCount();
218
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583 }
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584
403
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585 /**
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586 * Get index of manifest revision that corresponds to specified changeset
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587 * @param changesetRevisionIndex non-negative index of changelog revision, or {@link HgRepository#TIP}
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588 * @return index of manifest revision, or {@link HgRepository#BAD_REVISION} if changeset doesn't reference a valid manifest
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589 * @throws HgInvalidRevisionException if method argument specifies non-existent revision index
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590 */
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591 public int at(int changesetRevisionIndex) throws HgInvalidRevisionException {
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592 if (changesetRevisionIndex == TIP) {
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593 changesetRevisionIndex = changelogRevisionCount - 1;
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594 }
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595 if (changesetRevisionIndex >= changelogRevisionCount) {
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596 throw new HgInvalidRevisionException(changesetRevisionIndex);
257
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597 }
218
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598 if (changelog2manifest != null) {
403
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599 return changelog2manifest[changesetRevisionIndex];
218
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600 }
403
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601 return changesetRevisionIndex;
218
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602 }
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diff changeset
603
324
283b294d1079 Explore alternatives to access file-changelog combined history
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604 // XXX likely can be replaced with Revlog.RevisionInspector
218
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605 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess data) {
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606 if (changelog2manifest != null) {
220
8de327242aa0 Basic information about branches
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607 // next assertion is not an error, rather assumption check, which is too development-related to be explicit exception -
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608 // I just wonder if there are manifests that have two entries pointing to single changeset. It seems unrealistic, though -
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609 // changeset records one and only one manifest nodeid
403
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610 assert changelog2manifest[linkRevision] == BAD_REVISION : String.format("revision:%d, link:%d, already linked to revision:%d", revisionNumber, linkRevision, changelog2manifest[linkRevision]);
218
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611 changelog2manifest[linkRevision] = revisionNumber;
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612 } else {
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613 if (revisionNumber != linkRevision) {
403
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614 changelog2manifest = new int[changelogRevisionCount];
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615 Arrays.fill(changelog2manifest, BAD_REVISION);
218
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616 for (int i = 0; i < revisionNumber; changelog2manifest[i] = i, i++)
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617 ;
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618 changelog2manifest[linkRevision] = revisionNumber;
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619 }
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620 }
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621 }
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622
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623 public void start(int count, Callback callback, Object token) {
403
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624 if (count != changelogRevisionCount) {
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625 assert count < changelogRevisionCount; // no idea what to do if manifest has more revisions than changelog
218
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626 // the way how manifest may contain more revisions than changelog, as I can imagine, is a result of
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627 // some kind of an import tool (e.g. from SVN or CVS), that creates manifest and changelog independently.
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628 // Note, it's pure guess, I didn't see such repository yet (although the way manifest revisions
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629 // in cpython repo are numbered makes me think aforementioned way)
403
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630 changelog2manifest = new int[changelogRevisionCount];
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631 Arrays.fill(changelog2manifest, BAD_REVISION);
218
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632 }
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633 }
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diff changeset
634
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635 public void finish(Object token) {
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636 if (changelog2manifest == null) {
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637 return;
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638 }
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diff changeset
639 // I assume there'd be not too many revisions we don't know manifest of
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diff changeset
640 ArrayList<Integer> undefinedChangelogRevision = new ArrayList<Integer>();
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641 for (int i = 0; i < changelog2manifest.length; i++) {
403
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642 if (changelog2manifest[i] == BAD_REVISION) {
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643 undefinedChangelogRevision.add(i);
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644 }
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645 }
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646 for (int u : undefinedChangelogRevision) {
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diff changeset
647 Nodeid manifest = repo.getChangelog().range(u, u).get(0).manifest();
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648 // TODO calculate those missing effectively (e.g. cache and sort nodeids to speed lookup
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diff changeset
649 // right away in the #next (may refactor ParentWalker's sequential and sorted into dedicated helper and reuse here)
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650 if (manifest.isNull()) {
490
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diff changeset
651 repo.getSessionContext().getLog().dump(getClass(), Severity.Warn, "Changeset %d has no associated manifest entry", u);
423
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diff changeset
652 // keep -1 in the changelog2manifest map.
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653 } else {
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654 changelog2manifest[u] = repo.getManifest().getRevisionIndex(manifest);
354
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diff changeset
655 }
218
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diff changeset
656 }
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657 }
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658 }
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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659
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diff changeset
660 /**
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661 * Look up specified file in possibly multiple manifest revisions, collect file revision and flags.
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662 */
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diff changeset
663 private static class FileLookupInspector implements RevlogStream.Inspector {
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664
426
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665 private final Path filename;
415
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diff changeset
666 private final byte[] filenameAsBytes;
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667 private final IntMap<Nodeid> csetIndex2FileRev;
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668 private final IntMap<Flags> csetIndex2Flags;
426
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diff changeset
669 private final Inspector delegate;
415
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diff changeset
670
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diff changeset
671 public FileLookupInspector(EncodingHelper eh, Path fileToLookUp, IntMap<Nodeid> csetIndex2FileRevMap, IntMap<Flags> csetIndex2FlagsMap) {
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
672 assert fileToLookUp != null;
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
673 // need at least one map for the inspector to make any sense
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
674 assert csetIndex2FileRevMap != null || csetIndex2FlagsMap != null;
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
675 filename = fileToLookUp;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
676 filenameAsBytes = eh.toManifest(fileToLookUp.toString());
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
677 delegate = null;
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
678 csetIndex2FileRev = csetIndex2FileRevMap;
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
679 csetIndex2Flags = csetIndex2FlagsMap;
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
680 }
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
681
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
682 public FileLookupInspector(EncodingHelper eh, Path fileToLookUp, Inspector delegateInspector) {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
683 assert fileToLookUp != null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
684 assert delegateInspector != null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
685 filename = fileToLookUp;
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
686 filenameAsBytes = eh.toManifest(fileToLookUp.toString());
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
687 delegate = delegateInspector;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
688 csetIndex2FileRev = null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
689 csetIndex2Flags = null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
690 }
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
691
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
692 void walk(int manifestRevIndex, RevlogStream content) {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
693 content.iterate(manifestRevIndex, manifestRevIndex, true, this);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
694 }
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
695
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
696 void walk(int[] manifestRevIndexes, RevlogStream content) {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
697 content.iterate(manifestRevIndexes, true, this);
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
698 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
699
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: 421
diff changeset
700 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess data) {
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
701 ByteVector byteVector = new ByteVector(256, 128); // allocate for long paths right away
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
702 try {
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
703 byte b;
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
704 while (!data.isEmpty() && (b = data.readByte()) != '\n') {
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
705 if (b != 0) {
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
706 byteVector.add(b);
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
707 } else {
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
708 if (byteVector.equalsTo(filenameAsBytes)) {
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
709 Nodeid fileRev = null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
710 Flags flags = null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
711 if (csetIndex2FileRev != null || delegate != null) {
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
712 byte[] nid = new byte[40];
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
713 data.readBytes(nid, 0, 40);
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
714 fileRev = Nodeid.fromAscii(nid, 0, 40);
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
715 } else {
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
716 data.skip(40);
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
717 }
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
718 if (csetIndex2Flags != null || delegate != null) {
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
719 byteVector.clear();
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
720 while (!data.isEmpty() && (b = data.readByte()) != '\n') {
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
721 byteVector.add(b);
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
722 }
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
723 if (byteVector.size() == 0) {
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
724 flags = Flags.RegularFile;
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
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parents: 414
diff changeset
725 } else {
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
726 flags = Flags.parse(byteVector.toByteArray(), 0, byteVector.size());
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
727 }
426
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
728 }
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
729 if (delegate != null) {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
730 assert flags != null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
731 assert fileRev != null;
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
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parents: 425
diff changeset
732 delegate.begin(revisionNumber, Nodeid.fromBinary(nodeid, 0), linkRevision);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
733 delegate.next(fileRev, filename, flags);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
734 delegate.end(revisionNumber);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
735
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
736 } else {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
737 if (csetIndex2FileRev != null) {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
738 csetIndex2FileRev.put(linkRevision, fileRev);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
739 }
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
740 if (csetIndex2Flags != null) {
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
741 csetIndex2Flags.put(linkRevision, flags);
063b0663495a HgManifest#getFileRevisions refactored into #walkFileRevisions to match pattern throught rest of the library
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 425
diff changeset
742 }
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
743 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
744 break;
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
745 } else {
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
746 data.skip(40);
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
747 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
748 // else skip to the end of line
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
749 while (!data.isEmpty() && (b = data.readByte()) != '\n')
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
750 ;
574
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
751
88afffd39899 Improve memory consumption of HgManifest#getFileRevision(): avoid extra byte[] instances
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 571
diff changeset
752 byteVector.clear();
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
753 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
754 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
755 } 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: 421
diff changeset
756 throw new HgInvalidControlFileException("Failed reading manifest", ex, null);
415
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
757 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
758 }
ee8264d80747 Explicit constant for regular file flags, access to flags for a given file revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 414
diff changeset
759 }
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
760 }