/** *  * 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;    }}