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annotate src/org/tmatesoft/hg/internal/RepoInitializer.java @ 576:3c4db86e8c1f

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Issue 43: poor performance with InflaterDataAccess. Phase 2: inflate into buffer, effective skip and readByte/readBytes()
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 16 Apr 2013 19:31:57 +0200
parents ba36f66c32b4
children 4e6179bde4fc
rev   line source
490
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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.internal.RequiresFile.*;
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20
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21 import java.io.File;
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22 import java.io.FileOutputStream;
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23 import java.io.IOException;
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24 import java.nio.charset.Charset;
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25
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26 import org.tmatesoft.hg.core.SessionContext;
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27 import org.tmatesoft.hg.repo.HgInvalidControlFileException;
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28 import org.tmatesoft.hg.util.PathRewrite;
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29
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30 /**
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31 * Responsible of `requires` processing both on repo read and repo write
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32 * XXX needs better name, perhaps
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33 *
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34 * @author Artem Tikhomirov
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35 * @author TMate Software Ltd.
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36 */
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37 public class RepoInitializer {
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38 private int requiresFlags;
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39
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40 public RepoInitializer() {
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41 }
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42
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43 public RepoInitializer initRequiresFromFile(File repoDir) throws HgInvalidControlFileException {
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44 File requiresFile = new File(repoDir, "requires"); // not #getFileFromRepoDir() just in case it gets modified later
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45 try {
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46 int flags = new RequiresFile().parse(requiresFile);
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47 return setRequires(flags);
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48 } catch (IOException ex) {
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49 throw new HgInvalidControlFileException("Parse failed", ex, requiresFile);
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50 }
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51 }
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52
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53 public RepoInitializer setRequires(int flags) {
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54 requiresFlags = flags;
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55 return this;
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56 }
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57
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58 public int getRequires() {
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59 return requiresFlags;
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60 }
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61
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62 public void initEmptyRepository(File repoDir) throws IOException {
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63 repoDir.mkdirs();
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64 FileOutputStream requiresFile = new FileOutputStream(new File(repoDir, "requires"));
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65 StringBuilder sb = new StringBuilder(40);
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66 sb.append("revlogv1\n");
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67 if ((requiresFlags & STORE) != 0) {
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68 sb.append("store\n");
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69 }
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70 if ((requiresFlags & FNCACHE) != 0) {
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71 sb.append("fncache\n");
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72 }
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73 if ((requiresFlags & DOTENCODE) != 0) {
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74 sb.append("dotencode\n");
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75 }
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76 requiresFile.write(sb.toString().getBytes());
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77 requiresFile.close();
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78 new File(repoDir, "store").mkdir(); // with that, hg verify says ok.
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79 }
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80
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81 public PathRewrite buildDataFilesHelper(SessionContext ctx) {
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82 Charset cs = Internals.getFileEncoding(ctx);
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83 // StoragePathHelper needs fine-grained control over char encoding, hence doesn't use EncodingHelper
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84 return new StoragePathHelper((requiresFlags & STORE) != 0, (requiresFlags & FNCACHE) != 0, (requiresFlags & DOTENCODE) != 0, cs);
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85 }
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86
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87 public PathRewrite buildStoreFilesHelper() {
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88 if ((requiresFlags & STORE) != 0) {
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89 return new PathRewrite() {
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90 public CharSequence rewrite(CharSequence path) {
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 490
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91 return "store/" + path;
ba36f66c32b4 Refactor to keep knowledge about repository control files and their location in respect to .hg/ in a single place (facilitate future adoption of shared repositories)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 490
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92 }
ba36f66c32b4 Refactor to keep knowledge about repository control files and their location in respect to .hg/ in a single place (facilitate future adoption of shared repositories)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 490
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93 };
ba36f66c32b4 Refactor to keep knowledge about repository control files and their location in respect to .hg/ in a single place (facilitate future adoption of shared repositories)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 490
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94 } else {
ba36f66c32b4 Refactor to keep knowledge about repository control files and their location in respect to .hg/ in a single place (facilitate future adoption of shared repositories)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 490
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95 return new PathRewrite.Empty();
ba36f66c32b4 Refactor to keep knowledge about repository control files and their location in respect to .hg/ in a single place (facilitate future adoption of shared repositories)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 490
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96 }
ba36f66c32b4 Refactor to keep knowledge about repository control files and their location in respect to .hg/ in a single place (facilitate future adoption of shared repositories)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 490
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97 }
490
b3c16d1aede0 Refactoring: move HgRepository's implementation aspects to Internals (which is now its imlementation counterpart and primary repository class to be used by other parts of the library)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
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98 }