1 /***
2 * Copyright 2003-2010 Terracotta, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package net.sf.ehcache.transaction;
17
18 import java.util.concurrent.atomic.AtomicInteger;
19
20 /***
21 * A transaction ID implementation with uniqueness across a single JVM
22 *
23 * @author Ludovic Orban
24 */
25 public final class TransactionIDImpl implements TransactionID {
26
27 private static final AtomicInteger ID_GENERATOR = new AtomicInteger();
28
29 private final int id;
30 private volatile boolean commit;
31
32 /***
33 * Create a new TransactionIDImpl instance
34 */
35 TransactionIDImpl() {
36 this.id = ID_GENERATOR.getAndIncrement();
37 }
38
39 /***
40 * {@inheritDoc}
41 */
42 public boolean isDecisionCommit() {
43 return commit;
44 }
45
46 /***
47 * {@inheritDoc}
48 */
49 public void markForCommit() {
50 this.commit = true;
51 }
52
53
54 /***
55 * {@inheritDoc}
56 */
57 @Override
58 public final boolean equals(Object obj) {
59 if (obj instanceof TransactionIDImpl) {
60 TransactionIDImpl otherId = (TransactionIDImpl) obj;
61 return id == otherId.id;
62 }
63 return false;
64 }
65
66 /***
67 * {@inheritDoc}
68 */
69 @Override
70 public final int hashCode() {
71 return id;
72 }
73
74 /***
75 * {@inheritDoc}
76 */
77 @Override
78 public String toString() {
79 return "" + id + (commit ? " (marked for commit)" : "");
80 }
81 }