Mercurial > jhg

annotate src/org/tmatesoft/hg/internal/PhasesHelper.java @ 449:5787e912f60e smartgit3

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Speed up changeset phase detection when no parent cache is avalable
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 07 Jun 2012 16:01:09 +0200
parents 2e402c12ebc6
children 39fe00407937
rev   line source
445
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1 /*
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2 * Copyright (c) 2012 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.internal;
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18
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19 import static org.tmatesoft.hg.repo.HgPhase.Draft;
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20 import static org.tmatesoft.hg.repo.HgPhase.Secret;
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21
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22 import java.io.BufferedReader;
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23 import java.io.File;
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24 import java.io.FileReader;
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25 import java.io.IOException;
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26 import java.util.Collections;
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27 import java.util.HashMap;
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28 import java.util.LinkedList;
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29 import java.util.List;
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30
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31 import org.tmatesoft.hg.core.HgChangeset;
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32 import org.tmatesoft.hg.core.HgInvalidControlFileException;
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33 import org.tmatesoft.hg.core.Nodeid;
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34 import org.tmatesoft.hg.repo.HgChangelog;
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35 import org.tmatesoft.hg.repo.HgInternals;
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36 import org.tmatesoft.hg.repo.HgPhase;
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37 import org.tmatesoft.hg.repo.HgRepository;
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38
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39 /**
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40 * Support to deal with phases feature fo Mercurial (as of Mercutial version 2.1)
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41 *
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42 * @author Artem Tikhomirov
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43 * @author TMate Software Ltd.
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44 */
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45 public final class PhasesHelper {
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46
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47 private final HgRepository repo;
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48 private final HgChangelog.ParentWalker parentHelper;
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49 private Boolean repoSupporsPhases;
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50 private List<Nodeid> draftPhaseRoots;
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51 private List<Nodeid> secretPhaseRoots;
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52 private RevisionDescendants[][] phaseDescendants = new RevisionDescendants[HgPhase.values().length][];
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53
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54 public PhasesHelper(HgRepository hgRepo) {
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55 this(hgRepo, null);
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56 }
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57
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58 public PhasesHelper(HgRepository hgRepo, HgChangelog.ParentWalker pw) {
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59 repo = hgRepo;
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60 parentHelper = pw;
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61 }
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62
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63 public boolean isCapableOfPhases() throws HgInvalidControlFileException {
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64 if (null == repoSupporsPhases) {
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65 repoSupporsPhases = readRoots();
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66 }
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67 return repoSupporsPhases.booleanValue();
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68 }
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69
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70
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71 public HgPhase getPhase(HgChangeset cset) throws HgInvalidControlFileException {
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72 final Nodeid csetRev = cset.getNodeid();
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73 final int csetRevIndex = cset.getRevision();
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74 return getPhase(csetRevIndex, csetRev);
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75 }
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76
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77 public HgPhase getPhase(final int csetRevIndex, Nodeid csetRev) throws HgInvalidControlFileException {
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78 if (!isCapableOfPhases()) {
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79 return HgPhase.Undefined;
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80 }
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81 // csetRev is only used when parentHelper is available
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82 if (parentHelper != null && (csetRev == null || csetRev.isNull())) {
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83 csetRev = repo.getChangelog().getRevision(csetRevIndex);
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84 }
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85
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86 for (HgPhase phase : new HgPhase[] {HgPhase.Secret, HgPhase.Draft }) {
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87 List<Nodeid> roots = getPhaseRoots(phase);
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88 if (roots.isEmpty()) {
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89 continue;
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90 }
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91 if (parentHelper != null) {
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92 if (roots.contains(csetRev)) {
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93 return phase;
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94 }
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95 if (parentHelper.childrenOf(roots).contains(csetRev)) {
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96 return phase;
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97 }
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98 } else {
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99 // no parent helper
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100 // search all descendants.RevisuionDescendats includes root as well.
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101 for (RevisionDescendants rd : getPhaseDescendants(phase)) {
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102 // isCandidate is to go straight to another root if changeset was added later that the current root
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103 if (rd.isCandidate(csetRevIndex) && rd.isDescendant(csetRevIndex)) {
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104 return phase;
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105 }
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106 }
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107 }
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108 }
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109 return HgPhase.Public;
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110
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111 }
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112
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113 private Boolean readRoots() throws HgInvalidControlFileException {
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114 // FIXME shall access phaseroots through HgRepository#repoPathHelper
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115 File phaseroots = new File(HgInternals.getRepositoryDir(repo), "store/phaseroots");
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116 try {
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117 if (!phaseroots.exists()) {
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118 return Boolean.FALSE;
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119 }
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120 HashMap<HgPhase, List<Nodeid>> phase2roots = new HashMap<HgPhase, List<Nodeid>>();
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121 BufferedReader br = new BufferedReader(new FileReader(phaseroots));
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122 String line;
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123 while ((line = br.readLine()) != null) {
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124 String[] lc = line.trim().split("\\s+");
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125 if (lc.length == 0) {
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126 continue;
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127 }
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128 if (lc.length != 2) {
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129 HgInternals.getContext(repo).getLog().warn(getClass(), "Bad line in phaseroots:%s", line);
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130 continue;
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131 }
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132 int phaseIndex = Integer.parseInt(lc[0]);
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133 Nodeid rootRev = Nodeid.fromAscii(lc[1]);
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134 HgPhase phase = HgPhase.parse(phaseIndex);
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135 List<Nodeid> roots = phase2roots.get(phase);
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136 if (roots == null) {
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137 phase2roots.put(phase, roots = new LinkedList<Nodeid>());
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138 }
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139 roots.add(rootRev);
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140 }
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141 draftPhaseRoots = phase2roots.containsKey(Draft) ? phase2roots.get(Draft) : Collections.<Nodeid>emptyList();
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142 secretPhaseRoots = phase2roots.containsKey(Secret) ? phase2roots.get(Secret) : Collections.<Nodeid>emptyList();
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143 } catch (IOException ex) {
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144 throw new HgInvalidControlFileException(ex.toString(), ex, phaseroots);
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145 }
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146 return Boolean.TRUE;
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147 }
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148
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149 private List<Nodeid> getPhaseRoots(HgPhase phase) {
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150 switch (phase) {
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151 case Draft : return draftPhaseRoots;
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152 case Secret : return secretPhaseRoots;
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153 }
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154 return Collections.emptyList();
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155 }
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156
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157
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158 private RevisionDescendants[] getPhaseDescendants(HgPhase phase) throws HgInvalidControlFileException {
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159 int ordinal = phase.ordinal();
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160 if (phaseDescendants[ordinal] == null) {
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161 phaseDescendants[ordinal] = buildPhaseDescendants(phase);
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162 }
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163 return phaseDescendants[ordinal];
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164 }
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165
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166 private RevisionDescendants[] buildPhaseDescendants(HgPhase phase) throws HgInvalidControlFileException {
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167 int[] roots = toIndexes(getPhaseRoots(phase));
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168 RevisionDescendants[] rv = new RevisionDescendants[roots.length];
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169 for (int i = 0; i < roots.length; i++) {
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170 rv[i] = new RevisionDescendants(repo, roots[i]);
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171 rv[i].build();
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172 }
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173 return rv;
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174 }
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175
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176 private int[] toIndexes(List<Nodeid> roots) throws HgInvalidControlFileException {
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177 int[] rv = new int[roots.size()];
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178 for (int i = 0; i < rv.length; i++) {
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179 rv[i] = repo.getChangelog().getRevisionIndex(roots.get(i));
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180 }
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181 return rv;
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182 }
445
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183 }