Mercurial > jhg

annotate src/org/tmatesoft/hg/internal/FNCacheFile.java @ 631:8a5cdcb27b8f

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
AIOOBE in HgManifest.RevisionMapper. Provide more details about exception context. Create lock file atomically. Test concurrent pull-rebase and read
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 30 May 2013 15:24:17 +0200
parents 507602cb4fb3
children c75297c17867
rev   line source
539
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
1 /*
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
2 * Copyright (c) 2013 TMate Software Ltd
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
3 *
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
4 * This program is free software; you can redistribute it and/or modify
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
5 * it under the terms of the GNU General Public License as published by
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
6 * the Free Software Foundation; version 2 of the License.
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
7 *
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
8 * This program is distributed in the hope that it will be useful,
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
11 * GNU General Public License for more details.
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
12 *
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
13 * For information on how to redistribute this software under
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
14 * the terms of a license other than GNU General Public License
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
15 * contact TMate Software at support@hg4j.com
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
16 */
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
17 package org.tmatesoft.hg.internal;
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
18
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
19 import java.io.File;
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
20 import java.io.FileOutputStream;
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
21 import java.io.IOException;
616
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
22 import java.nio.ByteBuffer;
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
23 import java.nio.CharBuffer;
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
24 import java.nio.channels.FileChannel;
539
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
25 import java.nio.charset.Charset;
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
26 import java.util.ArrayList;
559
6ca3d0c5b4bc Commit: tests and fixes for defects discovered
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 539
diff changeset
27 import java.util.List;
539
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
28
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
29 import org.tmatesoft.hg.util.Path;
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
30
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
31 /**
559
6ca3d0c5b4bc Commit: tests and fixes for defects discovered
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 539
diff changeset
32 * Append-only fncache support
6ca3d0c5b4bc Commit: tests and fixes for defects discovered
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 539
diff changeset
33 *
539
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
34 * <blockquote>
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
35 * The fncache file contains the paths of all filelog files in the store as encoded by mercurial.filelog.encodedir. The paths are separated by '\n' (LF).
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
36 * </blockquote>
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
37 * @see http://mercurial.selenic.com/wiki/fncacheRepoFormat
559
6ca3d0c5b4bc Commit: tests and fixes for defects discovered
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 539
diff changeset
38 *
6ca3d0c5b4bc Commit: tests and fixes for defects discovered
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 539
diff changeset
39 *
539
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
40 * @author Artem Tikhomirov
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
41 * @author TMate Software Ltd.
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
42 */
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
43 public class FNCacheFile {
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
44
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
45 private final Internals repo;
559
6ca3d0c5b4bc Commit: tests and fixes for defects discovered
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 539
diff changeset
46 // private final List<Path> files;
616
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
47 private final List<Path> addedDotI;
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
48 private final List<Path> addedDotD;
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
49 private final FNCachePathHelper pathHelper;
539
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
50
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
51 public FNCacheFile(Internals internalRepo) {
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
52 repo = internalRepo;
559
6ca3d0c5b4bc Commit: tests and fixes for defects discovered
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 539
diff changeset
53 // files = new ArrayList<Path>();
616
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
54 pathHelper = new FNCachePathHelper();
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
55 addedDotI = new ArrayList<Path>(5);
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
56 addedDotD = new ArrayList<Path>(5);
539
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
57 }
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
58
559
6ca3d0c5b4bc Commit: tests and fixes for defects discovered
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 539
diff changeset
59 /*
6ca3d0c5b4bc Commit: tests and fixes for defects discovered
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 539
diff changeset
60 * For append-only option, we don't care reading the original content
539
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
61 public void read(Path.Source pathFactory) throws IOException {
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
62 File f = fncacheFile();
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
63 files.clear();
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
64 if (!f.exists()) {
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
65 return;
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
66 }
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
67 ArrayList<String> entries = new ArrayList<String>();
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
68 // names in fncache are in local encoding, shall translate to unicode
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
69 new LineReader(f, repo.getSessionContext().getLog(), repo.getFilenameEncoding()).read(new LineReader.SimpleLineCollector(), entries);
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
70 for (String e : entries) {
624
507602cb4fb3 FIXMEs and TODOs: pay some technical debt
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 616
diff changeset
71 // XXX plain wrong, need either to decode paths and strip off .i/.d or (if keep names as is) change write()
539
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
72 files.add(pathFactory.path(e));
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
73 }
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
74 }
559
6ca3d0c5b4bc Commit: tests and fixes for defects discovered
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 539
diff changeset
75 */
539
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
76
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
77 public void write() throws IOException {
616
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
78 if (addedDotI.isEmpty() && addedDotD.isEmpty()) {
539
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
79 return;
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
80 }
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
81 File f = fncacheFile();
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
82 f.getParentFile().mkdirs();
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
83 final Charset filenameEncoding = repo.getFilenameEncoding();
616
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
84 ArrayList<CharBuffer> added = new ArrayList<CharBuffer>();
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
85 for (Path p : addedDotI) {
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
86 added.add(CharBuffer.wrap(pathHelper.rewrite(p)));
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
87 }
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
88 for (Path p : addedDotD) {
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
89 // XXX FNCachePathHelper always return name of an index file, need to change it into a name of data file,
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
90 // although the approach (to replace last char) is depressingly awful
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
91 CharSequence cs = pathHelper.rewrite(p);
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
92 CharBuffer cb = CharBuffer.allocate(cs.length());
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
93 cb.append(cs);
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
94 cb.put(cs.length()-1, 'd');
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
95 cb.flip();
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
96 added.add(cb);
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
97 }
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
98 FileChannel fncacheFile = new FileOutputStream(f, true).getChannel();
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
99 ByteBuffer lf = ByteBuffer.wrap(new byte[] { 0x0A });
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
100 for (CharBuffer b : added) {
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
101 fncacheFile.write(filenameEncoding.encode(b));
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
102 fncacheFile.write(lf);
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
103 lf.rewind();
539
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
104 }
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
105 fncacheFile.close();
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
106 }
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
107
616
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
108 public void addIndex(Path p) {
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
109 addedDotI.add(p);
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
110 }
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
111
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
112 public void addData(Path p) {
5e0313485eef encode directories as demanded by fncache format
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 559
diff changeset
113 addedDotD.add(p);
539
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
114 }
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
115
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
116 private File fncacheFile() {
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
117 return repo.getFileFromStoreDir("fncache");
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
118 }
9edfd5a223b8 Commit: handle empty repository case
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
119 }