1 /***
2 *
3 * Copyright 2004 Protique Ltd
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 **/
18 package org.codehaus.activemq.util;
19
20 import org.codehaus.activemq.store.PersistenceAdapter;
21
22 import javax.jms.JMSException;
23
24 /***
25 * A helper class for running code with a PersistenceAdapter
26 * in a transaction.
27 *
28 * @version $Revision: 1.2 $
29 */
30 public class TransactionTemplate {
31 private PersistenceAdapter persistenceAdapter;
32
33 public TransactionTemplate(PersistenceAdapter persistenceAdapter) {
34 this.persistenceAdapter = persistenceAdapter;
35 }
36
37 public void run(Callback task) throws JMSException {
38 persistenceAdapter.beginTransaction();
39 Throwable throwable = null;
40 try {
41 task.execute();
42 }
43 catch (Throwable t) {
44 throwable = t;
45 }
46 if (throwable == null) {
47 persistenceAdapter.commitTransaction();
48 }
49 else {
50 persistenceAdapter.rollbackTransaction();
51 }
52 }
53 }