001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. 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 */ 017package org.apache.activemq.util; 018 019import java.io.IOException; 020import org.apache.activemq.broker.ConnectionContext; 021import org.apache.activemq.store.PersistenceAdapter; 022import org.slf4j.Logger; 023import org.slf4j.LoggerFactory; 024 025/** 026 * A helper class for running code with a PersistenceAdapter in a transaction. 027 * 028 * 029 */ 030public class TransactionTemplate { 031 private static final Logger LOG = LoggerFactory.getLogger(TransactionTemplate.class); 032 private PersistenceAdapter persistenceAdapter; 033 private ConnectionContext context; 034 035 public TransactionTemplate(PersistenceAdapter persistenceAdapter, ConnectionContext context) { 036 this.persistenceAdapter = persistenceAdapter; 037 this.context = context; 038 } 039 040 public void run(Callback task) throws IOException { 041 persistenceAdapter.beginTransaction(context); 042 Throwable throwable = null; 043 try { 044 task.execute(); 045 } catch (IOException t) { 046 throwable = t; 047 throw t; 048 } catch (RuntimeException t) { 049 throwable = t; 050 throw t; 051 } catch (Throwable t) { 052 throwable = t; 053 throw IOExceptionSupport.create("Persistence task failed: " + t, t); 054 } finally { 055 if (throwable == null) { 056 persistenceAdapter.commitTransaction(context); 057 } else { 058 LOG.error("Having to Rollback - caught an exception: " + throwable); 059 persistenceAdapter.rollbackTransaction(context); 060 } 061 } 062 } 063 064 public ConnectionContext getContext() { 065 return context; 066 } 067 068 public PersistenceAdapter getPersistenceAdapter() { 069 return persistenceAdapter; 070 } 071}