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annotate src/org/tmatesoft/hg/internal/RevlogDump.java @ 338:3cfa4d908fc9

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Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close())
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 15 Nov 2011 04:47:03 +0100
parents e9d275fb0bc0
children d45ad07dc94c
rev   line source
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1 /*
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2 * Copyright (c) 2010-2011 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.internal;
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18
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19 import java.io.BufferedInputStream;
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20 import java.io.DataInput;
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21 import java.io.DataInputStream;
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22 import java.io.File;
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23 import java.io.FileInputStream;
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24 import java.math.BigInteger;
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25 import java.util.zip.Inflater;
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26
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27 /**
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28 * Utility to test/debug/troubleshoot
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29 *
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30 * @author Artem Tikhomirov
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31 * @author TMate Software Ltd.
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32 */
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33 public class RevlogDump {
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34
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35 /**
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36 * Takes 3 command line arguments -
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37 * repository path,
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38 * path to index file (i.e. store/data/hello.c.i) in the repository (relative)
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39 * and "dumpData" whether to print actual content or just revlog headers
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40 */
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41 public static void main(String[] args) throws Exception {
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42 String repo = "/temp/hg/hello/.hg/";
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43 String filename = "store/00changelog.i";
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44 // String filename = "store/data/hello.c.i";
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45 // String filename = "store/data/docs/readme.i";
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46 boolean dumpData = true;
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47 if (args.length > 1) {
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48 repo = args[0];
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49 filename = args[1];
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50 dumpData = args.length > 2 ? "dumpData".equals(args[2]) : false;
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51 }
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52 //
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53 DataInputStream dis = new DataInputStream(new BufferedInputStream(new FileInputStream(new File(repo + filename))));
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54 DataInput di = dis;
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55 dis.mark(10);
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56 int versionField = di.readInt();
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57 dis.reset();
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58 final int INLINEDATA = 1 << 16;
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59
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60 boolean inlineData = (versionField & INLINEDATA) != 0;
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61 System.out.printf("%#8x, inline: %b\n", versionField, inlineData);
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62 System.out.println("Index Offset Flags Packed Actual Base Rev Link Rev Parent1 Parent2 nodeid");
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63 int entryCount = 0;
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64 while (dis.available() > 0) {
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65 long l = di.readLong();
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66 long offset = l >>> 16;
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67 int flags = (int) (l & 0X0FFFF);
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68 int compressedLen = di.readInt();
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69 int actualLen = di.readInt();
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70 int baseRevision = di.readInt();
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71 int linkRevision = di.readInt();
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72 int parent1Revision = di.readInt();
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73 int parent2Revision = di.readInt();
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74 byte[] buf = new byte[32];
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75 di.readFully(buf, 12, 20);
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76 dis.skipBytes(12);
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77 // CAN'T USE skip() here without extra precautions. E.g. I ran into situation when
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78 // buffer was 8192 and BufferedInputStream was at position 8182 before attempt to skip(12).
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79 // BIS silently skips available bytes and leaves me two extra bytes that ruin the rest of the code.
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80 System.out.printf("%4d:%14d %6X %10d %10d %10d %10d %8d %8d %040x\n", entryCount, offset, flags, compressedLen, actualLen, baseRevision, linkRevision, parent1Revision, parent2Revision, new BigInteger(buf));
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81 if (inlineData) {
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82 String resultString;
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83 byte[] data = new byte[compressedLen];
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84 di.readFully(data);
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85 if (data[0] == 0x78 /* 'x' */) {
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86 Inflater zlib = new Inflater();
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87 zlib.setInput(data, 0, compressedLen);
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88 byte[] result = new byte[actualLen*2];
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89 int resultLen = zlib.inflate(result);
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90 zlib.end();
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91 resultString = new String(result, 0, resultLen, "UTF-8");
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92 } else if (data[0] == 0x75 /* 'u' */) {
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93 resultString = new String(data, 1, data.length - 1, "UTF-8");
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94 } else {
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95 resultString = new String(data);
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96 }
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97 if (dumpData) {
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98 System.out.println(resultString);
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99 }
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100 }
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101 entryCount++;
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102 }
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103 dis.close();
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104 //
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105 }
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106 }