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; 018 019/** 020 * A simple callback object used by the 021 * {@link org.apache.activemq.util.TransactionTemplate} 022 * and {@link org.apache.activemq.util.ExceptionTemplate} 023 objects to provide automatic transactional or exception handling blocks. 024 * 025 * 026 */ 027public interface Callback { 028 029 /** 030 * Executes some piece of code within a transaction 031 * performing a commit if there is no exception thrown 032 * else a rollback is performed 033 * @throws Exception TODO 034 */ 035 void execute() throws Exception; 036}