?? localtransactionendpoint.java
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/** * * Copyright 2005 LogicBlaze, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * **/package org.jencks;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import javax.jms.Message;import javax.jms.MessageListener;import javax.resource.ResourceException;import javax.resource.spi.LocalTransaction;import javax.resource.spi.endpoint.MessageEndpoint;import java.lang.reflect.Method;/** * Performs a local transaction while processing the message * * @version $Revision: 1.1.1.1 $ */public class LocalTransactionEndpoint implements MessageEndpoint, MessageListener { private static final Log log = LogFactory.getLog(LocalTransactionEndpoint.class); private MessageListener messageListener; private LocalTransaction localTransaction; public LocalTransactionEndpoint(MessageListener messageListener, LocalTransaction localTransaction) { this.messageListener = messageListener; this.localTransaction = localTransaction; } public void beforeDelivery(Method method) throws NoSuchMethodException, ResourceException { getLocalTransaction().begin(); } public void afterDelivery() throws ResourceException { getLocalTransaction().commit(); } public void release() { if (localTransaction != null) { try { localTransaction.rollback(); } catch (ResourceException e) { log.warn("Failed to rollback local transaction: " + e, e); } localTransaction = null; } } public void onMessage(Message message) { messageListener.onMessage(message); } /** * A getter which will return the current local transaction or throw a new exception * if this endpoint has already been released. */ protected LocalTransaction getLocalTransaction() throws ResourceException { if (localTransaction == null) { throw new ResourceException("This endpoint has already been released via a call to release() you cannot deliver messages to me"); } return localTransaction; }}
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