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Spring Framework example source code file (JmsMessageEndpointFactory.java)

This example Spring Framework source code file (JmsMessageEndpointFactory.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Spring Framework tags/keywords

abstractmessageendpoint, abstractmessageendpoint, abstractmessageendpointfactory, classloader, error, jmsmessageendpoint, jmsmessageendpointfactory, jmsresourceexception, jmsresourceexception, messagelistener, messagelistener, resourceexception, resourceexception, runtimeexception

The Spring Framework JmsMessageEndpointFactory.java source code

/*
 * Copyright 2002-2007 the original author or authors.
 *
 * 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.springframework.jms.listener.endpoint;

import javax.jms.Message;
import javax.jms.MessageListener;
import javax.resource.ResourceException;
import javax.resource.spi.UnavailableException;

import org.springframework.jca.endpoint.AbstractMessageEndpointFactory;

/**
 * JMS-specific implementation of the JCA 1.5
 * {@link javax.resource.spi.endpoint.MessageEndpointFactory} interface,
 * providing transaction management capabilities for a JMS listener object
 * (e.g. a {@link javax.jms.MessageListener} object).
 *
 * <p>Uses a static endpoint implementation, simply wrapping the
 * specified message listener object and exposing all of its implemented
 * interfaces on the endpoint instance.
 *
 * <p>Typically used with Spring's {@link JmsMessageEndpointManager},
 * but not tied to it. As a consequence, this endpoint factory could
 * also be used with programmatic endpoint management on a native
 * {@link javax.resource.spi.ResourceAdapter} instance.
 *
 * @author Juergen Hoeller
 * @since 2.5
 * @see #setMessageListener
 * @see #setTransactionManager
 * @see JmsMessageEndpointManager
 */
public class JmsMessageEndpointFactory extends AbstractMessageEndpointFactory  {

	private MessageListener messageListener;


	/**
	 * Set the JMS MessageListener for this endpoint.
	 */
	public void setMessageListener(MessageListener messageListener) {
		this.messageListener = messageListener;
	}

	/**
	 * Creates a concrete JMS message endpoint, internal to this factory.
	 */
	protected AbstractMessageEndpoint createEndpointInternal() throws UnavailableException {
		return new JmsMessageEndpoint();
	}


	/**
	 * Private inner class that implements the concrete JMS message endpoint.
	 */
	private class JmsMessageEndpoint extends AbstractMessageEndpoint implements MessageListener {

		public void onMessage(Message message) {
			boolean applyDeliveryCalls = !hasBeforeDeliveryBeenCalled();
			if (applyDeliveryCalls) {
				try {
					beforeDelivery(null);
				}
				catch (ResourceException ex) {
					throw new JmsResourceException(ex);
				}
			}
			try {
				messageListener.onMessage(message);
			}
			catch (RuntimeException ex) {
				onEndpointException(ex);
				throw ex;
			}
			catch (Error err) {
				onEndpointException(err);
				throw err;
			}
			finally {
				if (applyDeliveryCalls) {
					try {
						afterDelivery();
					}
					catch (ResourceException ex) {
						throw new JmsResourceException(ex);
					}
				}
			}
		}

		protected ClassLoader getEndpointClassLoader() {
			return messageListener.getClass().getClassLoader();
		}
	}


	/**
	 * Internal exception thrown when a ResourceExeption has been encountered
	 * during the endpoint invocation.
	 * <p>Will only be used if the ResourceAdapter does not invoke the
	 * endpoint's <code>beforeDelivery and afterDelivery
	 * directly, leavng it up to the concrete endpoint to apply those -
	 * and to handle any ResourceExceptions thrown from them.
	 */
	public static class JmsResourceException extends RuntimeException {

		public JmsResourceException(ResourceException cause) {
			super(cause);
		}
	}

}

Other Spring Framework examples (source code examples)

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