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 }