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 /** 021 * A simple callback object used by the 022 * {@link org.activemq.util.TransactionTemplate} 023 * and {@link org.activemq.util.ExceptionTemplate} 024 objects to provide automatic transactional or exception handling blocks. 025 * 026 * @version $Revision: 1.1.1.1 $ 027 */ 028 public interface Callback { 029 030 /** 031 * Executes some piece of code within a transaction 032 * performing a commit if there is no exception thrown 033 * else a rollback is performed 034 * 035 * @throws Throwable 036 */ 037 public void execute() throws Throwable; 038 }