Mercurial > jhg

annotate src/org/tmatesoft/hg/repo/HgRepositoryLock.java @ 497:02140be396d5

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Issue 38. Towards gentle handling of config files - parse them and keep every possible user change
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 25 Oct 2012 19:59:08 +0200
parents 9c0138cda59a
children 3cd3c3d37432
rev   line source
486
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
1 /*
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
2 * Copyright (c) 2012 TMate Software Ltd
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
3 *
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
4 * This program is free software; you can redistribute it and/or modify
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
5 * it under the terms of the GNU General Public License as published by
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
6 * the Free Software Foundation; version 2 of the License.
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
7 *
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
8 * This program is distributed in the hope that it will be useful,
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
11 * GNU General Public License for more details.
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
12 *
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
13 * For information on how to redistribute this software under
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
14 * the terms of a license other than GNU General Public License
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
15 * contact TMate Software at support@hg4j.com
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
16 */
487
db48a77ec8ff Access to reposiotry lock mechanism via HgRepositoryLock
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 486
diff changeset
17 package org.tmatesoft.hg.repo;
486
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
18
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
19 import java.io.File;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
20 import java.io.FileInputStream;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
21 import java.io.FileOutputStream;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
22 import java.io.IOException;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
23 import java.lang.management.ManagementFactory;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
24 import java.net.InetAddress;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
25 import java.nio.ByteBuffer;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
26 import java.nio.channels.FileChannel;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
27
489
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
28 import org.tmatesoft.hg.internal.Experimental;
487
db48a77ec8ff Access to reposiotry lock mechanism via HgRepositoryLock
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 486
diff changeset
29 import org.tmatesoft.hg.internal.Internals;
486
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
30
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
31 /**
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
32 * NOT SAFE FOR MULTITHREAD USE!
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
33 *
489
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
34 * <p>Usage:
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
35 * <pre>
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
36 * HgRepositoryLock lock = hgRepo.getWorkingDirLock();
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
37 * try {
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
38 * // Actually lock the repo
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
39 * lock.acquire();
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
40 * ///
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
41 * // do whatever modifies working directory
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
42 * ...
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
43 * } finally {
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
44 * if (lock.isLocked()) {
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
45 * // this check is needed not to release()
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
46 * // erroneously in case acquire() failed (e.g. due to timeout)
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
47 * lock.release();
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
48 * }
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
49 *
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
50 * </pre>
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
51 *
486
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
52 * Unlike original mechanism, we don't use symlinks, rather files, as it's easier to implement
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
53 *
489
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
54 * @see http://code.google.com/p/hg4j/issues/detail?id=35
486
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
55 * @author Artem Tikhomirov
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
56 * @author TMate Software Ltd.
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
57 */
489
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
58 @Experimental(reason="Work in progress")
487
db48a77ec8ff Access to reposiotry lock mechanism via HgRepositoryLock
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 486
diff changeset
59 public class HgRepositoryLock {
486
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
60 /*
488
45b3b6ca046f Repository locking mechanism is alive
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 487
diff changeset
61 * Lock .hg/ except .hg/store/ .hg/wlock (new File(hgRepo.getRepoRoot(),"wlock"))
45b3b6ca046f Repository locking mechanism is alive
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 487
diff changeset
62 * Lock .hg/store/ .hg/store/lock (HgRepository.repoPathHelper("lock"))
486
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
63 */
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
64
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
65 private final File lockFile;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
66 private int use = 0;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
67 private final int timeoutSeconds;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
68
487
db48a77ec8ff Access to reposiotry lock mechanism via HgRepositoryLock
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 486
diff changeset
69 HgRepositoryLock(File lock, int timeoutInSeconds) {
486
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
70 lockFile = lock;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
71 timeoutSeconds = timeoutInSeconds;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
72 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
73
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
74 /**
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
75 * Tries to read lock file and supplies hostname:pid (or just pid) information from there
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
76 * @return <code>null</code> if no lock file available at the moment
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
77 */
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
78 public String readLockInfo() {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
79 if (lockFile.exists()) {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
80 try {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
81 byte[] bytes = read(lockFile);
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
82 if (bytes != null && bytes.length > 0) {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
83 return new String(bytes);
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
84 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
85 } catch (Exception ex) {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
86 // deliberately ignored
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
87 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
88 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
89 return null;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
90 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
91
489
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
92 /**
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
93 * @return <code>true</code> if we hold the lock
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
94 */
486
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
95 public boolean isLocked() {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
96 return use > 0;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
97 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
98
489
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
99 /**
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
100 * Perform actual locking. Waits for timeout (if specified at construction time)
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
101 * before throwing {@link HgInvalidStateException} in case lock is not available
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
102 * immediately.
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
103 *
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
104 * <p>Multiple calls are possible, but corresponding number of {@link #release()}
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
105 * calls shall be made.
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
106 */
486
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
107 public void acquire() {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
108 if (use > 0) {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
109 use++;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
110 return;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
111 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
112 StringBuilder lockDescription = new StringBuilder();
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
113 lockDescription.append(getHostname());
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
114 lockDescription.append(':');
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
115 lockDescription.append(getPid());
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
116 byte[] bytes = lockDescription.toString().getBytes();
487
db48a77ec8ff Access to reposiotry lock mechanism via HgRepositoryLock
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 486
diff changeset
117 long stopTime = timeoutSeconds < 0 ? -1 : (System.currentTimeMillis() + timeoutSeconds*1000);
486
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
118 do {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
119 synchronized(this) {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
120 try {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
121 if (!lockFile.exists()) {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
122 write(lockFile, bytes);
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
123 use++;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
124 return;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
125 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
126 } catch (IOException ex) {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
127 // deliberately ignored
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
128 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
129 try {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
130 wait(1000);
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
131 } catch (InterruptedException ex) {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
132 // deliberately ignored
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
133 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
134 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
135
487
db48a77ec8ff Access to reposiotry lock mechanism via HgRepositoryLock
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 486
diff changeset
136 } while (stopTime == -1/*no timeout*/ || System.currentTimeMillis() <= stopTime);
486
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
137 String msg = String.format("Failed to aquire lock, waited for %d seconds, present owner: '%s'", timeoutSeconds, readLockInfo());
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
138 throw new HgInvalidStateException(msg);
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
139 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
140
489
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
141 /**
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
142 * Release lock we own
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
143 */
486
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
144 public void release() {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
145 if (use == 0) {
489
9c0138cda59a HgRepositoryLock: some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 488
diff changeset
146 throw new HgInvalidStateException("Lock is not held!");
486
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
147 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
148 use--;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
149 if (use > 0) {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
150 return;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
151 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
152 // do release
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
153 lockFile.delete();
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
154 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
155
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
156 protected String getHostname() {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
157 try {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
158 return InetAddress.getLocalHost().getHostName();
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
159 } catch (Exception ex) {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
160 return "localhost";
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
161 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
162 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
163
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
164 protected int getPid() {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
165 try {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
166 // @see http://blog.igorminar.com/2007/03/how-java-application-can-discover-its.html
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
167 if (!Internals.runningOnWindows()) {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
168 File f = new File("/proc/self");
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
169 if (f.exists()) {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
170 // /proc/self is a symlink to /proc/pid/ directory
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
171 return Integer.parseInt(f.getCanonicalFile().getName());
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
172 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
173 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
174 String rtBean = ManagementFactory.getRuntimeMXBean().getName();
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
175 int x;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
176 if ((x = rtBean.indexOf('@')) != -1) {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
177 return Integer.parseInt(rtBean.substring(0, x));
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
178 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
179 return -1;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
180 } catch (Exception ex) {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
181 return -1;
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
182 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
183 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
184
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
185 private static void write(File f, byte[] content) throws IOException {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
186 FileOutputStream fos = new FileOutputStream(f);
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
187 fos.write(content);
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
188 fos.close();
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
189 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
190
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
191 private static byte[] read(File f) throws IOException {
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
192 FileChannel fc = new FileInputStream(f).getChannel();
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
193 ByteBuffer bb = ByteBuffer.allocate(Internals.ltoi(fc.size()));
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
194 fc.read(bb);
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
195 fc.close();
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
196 return bb.array();
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
197 }
d740edfff563 Provisional support for Mercurial lock mechanism
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
198 }