001 /**
002 *
003 * Copyright 2004 Protique Ltd
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 *
017 **/
018 package org.activemq.util;
019
020 import org.activemq.store.PersistenceAdapter;
021
022 import javax.jms.JMSException;
023
024 /**
025 * A helper class for running code with a PersistenceAdapter
026 * in a transaction.
027 *
028 * @version $Revision: 1.1.1.1 $
029 */
030 public class TransactionTemplate {
031 private PersistenceAdapter persistenceAdapter;
032
033 public TransactionTemplate(PersistenceAdapter persistenceAdapter) {
034 this.persistenceAdapter = persistenceAdapter;
035 }
036
037 public void run(Callback task) throws JMSException {
038 persistenceAdapter.beginTransaction();
039 Throwable throwable = null;
040 try {
041 task.execute();
042 }
043 catch (JMSException t) {
044 throwable = t;
045 throw t;
046 }
047 catch (RuntimeException t) {
048 throwable = t;
049 throw t;
050 }
051 catch (Throwable t) {
052 throwable = t;
053 throw JMSExceptionHelper.newJMSException("Persistence task failed: "+t, t);
054 } finally {
055 if (throwable == null) {
056 persistenceAdapter.commitTransaction();
057 }
058 else {
059 persistenceAdapter.rollbackTransaction();
060 }
061 }
062 }
063 }