1. Project Clover database Sat Feb 2 2019 06:45:20 CET
  2. Package org.xwiki.job.internal

File JobGroupPathLockTree.java

 

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Code metrics

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Classes

Class Line # Actions
JobGroupPathLockTree 35 11 0% 6 0
1.0100%
 

Contributing tests

This file is covered by 114 tests. .

Source view

1    /*
2    * See the NOTICE file distributed with this work for additional
3    * information regarding copyright ownership.
4    *
5    * This is free software; you can redistribute it and/or modify it
6    * under the terms of the GNU Lesser General Public License as
7    * published by the Free Software Foundation; either version 2.1 of
8    * the License, or (at your option) any later version.
9    *
10    * This software is distributed in the hope that it will be useful,
11    * but WITHOUT ANY WARRANTY; without even the implied warranty of
12    * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13    * Lesser General Public License for more details.
14    *
15    * You should have received a copy of the GNU Lesser General Public
16    * License along with this software; if not, write to the Free
17    * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
18    * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
19    */
20    package org.xwiki.job.internal;
21   
22    import java.util.Map;
23    import java.util.concurrent.ConcurrentHashMap;
24    import java.util.concurrent.locks.ReadWriteLock;
25    import java.util.concurrent.locks.ReentrantReadWriteLock;
26   
27    import org.xwiki.job.JobGroupPath;
28   
29    /**
30    * Helper for hierarchical locking.
31    *
32    * @version $Id: 2b2fd70cb774cda7431ba2781882d0a22e304eb0 $
33    * @since 6.1M2
34    */
 
35    public class JobGroupPathLockTree
36    {
37    private final Map<JobGroupPath, ReadWriteLock> tree = new ConcurrentHashMap<JobGroupPath, ReadWriteLock>();
38   
 
39  1920 toggle private synchronized ReadWriteLock getLock(JobGroupPath key)
40    {
41  1920 ReadWriteLock lock = this.tree.get(key);
42   
43  1920 if (lock == null) {
44  389 lock = new ReentrantReadWriteLock(true);
45  389 this.tree.put(key, lock);
46    }
47   
48  1920 return lock;
49    }
50   
51    /**
52    * @param key lock provided job group and all its parents
53    */
 
54  426 toggle public void lock(JobGroupPath key)
55    {
56  426 getLock(key).writeLock().lock();
57   
58  960 for (JobGroupPath path = key.getParent(); path != null; path = path.getParent()) {
59  534 getLock(path).readLock().lock();
60    }
61    }
62   
63    /**
64    * @param key unlock provided job group and all its parents
65    */
 
66  426 toggle public void unlock(JobGroupPath key)
67    {
68  426 getLock(key).writeLock().unlock();
69   
70  960 for (JobGroupPath path = key.getParent(); path != null; path = path.getParent()) {
71  534 getLock(path).readLock().unlock();
72    }
73    }
74    }