1 /*
2 * ModeShape (http://www.modeshape.org)
3 * See the COPYRIGHT.txt file distributed with this work for information
4 * regarding copyright ownership. Some portions may be licensed
5 * to Red Hat, Inc. under one or more contributor license agreements.
6 * See the AUTHORS.txt file in the distribution for a full listing of
7 * individual contributors.
8 *
9 * ModeShape is free software. Unless otherwise indicated, all code in ModeShape
10 * is licensed to you under the terms of the GNU Lesser General Public License as
11 * published by the Free Software Foundation; either version 2.1 of
12 * the License, or (at your option) any later version.
13 *
14 * ModeShape is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this software; if not, write to the Free
21 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
22 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
23 */
24 package org.modeshape.graph.connector.map;
25
26 import java.util.concurrent.locks.Lock;
27 import net.jcip.annotations.Immutable;
28
29 /**
30 * A {@link MapRepositoryTransaction} based upon a {@link Lock}.
31 */
32 @Immutable
33 public class LockBasedTransaction implements MapRepositoryTransaction {
34 private final Lock lock;
35
36 /**
37 * Create a transaction given the lock. This construtor attempts to {@link Lock#lock() acquire the lock}.
38 *
39 * @param lock the lock; may not be null
40 */
41 public LockBasedTransaction( Lock lock ) {
42 assert lock != null;
43 this.lock = lock;
44 // Make sure we acquire the lock...
45 this.lock.lock();
46 }
47
48 /**
49 * {@inheritDoc}
50 *
51 * @see org.modeshape.graph.connector.map.MapRepositoryTransaction#commit()
52 */
53 public void commit() {
54 this.lock.unlock();
55 }
56
57 /**
58 * {@inheritDoc}
59 *
60 * @see org.modeshape.graph.connector.map.MapRepositoryTransaction#rollback()
61 */
62 public void rollback() {
63 this.lock.unlock();
64 }
65 }