Spring Framework example source code file (StandardJmsActivationSpecFactory.java)

This example Spring Framework source code file (StandardJmsActivationSpecFactory.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

activationspec, activationspec, auto-acknowledge, auto-acknowledge, class, dups-ok-acknowledge, dups-ok-acknowledge, durable, illegalargumentexception, illegalargumentexception, jca, jmsactivationspecconfig, no, only, util

The Spring Framework StandardJmsActivationSpecFactory.java source code

/*
 * Copyright 2002-2008 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 java.util.Properties;

import javax.jms.JMSException;
import javax.jms.Queue;
import javax.jms.Session;
import javax.jms.Topic;
import javax.resource.spi.ActivationSpec;
import javax.resource.spi.ResourceAdapter;

import org.springframework.beans.BeanUtils;
import org.springframework.beans.BeanWrapper;
import org.springframework.beans.PropertyAccessorFactory;
import org.springframework.jms.support.destination.DestinationResolutionException;
import org.springframework.jms.support.destination.DestinationResolver;

/**
 * Standard implementation of the {@link JmsActivationSpecFactory} interface.
 * Supports the standard JMS properties as defined by the JMS 1.5 specification
 * (Appendix B); ignores Spring's "maxConcurrency" and "prefetchSize" settings.
 *
 * <p>The 'activationSpecClass' property is required, explicitly defining
 * the fully-qualified class name of the provider's ActivationSpec class
 * (e.g. "org.apache.activemq.ra.ActiveMQActivationSpec").
 *
 * <p>Check out {@link DefaultJmsActivationSpecFactory} for an extended variant
 * of this class, supporting some further default conventions beyond the plain
 * JMS 1.5 specification.
 *
 * @author Juergen Hoeller
 * @since 2.5
 * @see #setActivationSpecClass
 * @see DefaultJmsActivationSpecFactory
 */
public class StandardJmsActivationSpecFactory implements JmsActivationSpecFactory {

	private Class activationSpecClass;

	private Properties defaultProperties;

	private DestinationResolver destinationResolver;


	/**
	 * Specify the fully-qualified ActivationSpec class name for the target
	 * provider (e.g. "org.apache.activemq.ra.ActiveMQActivationSpec").
	 */
	public void setActivationSpecClass(Class activationSpecClass) {
		this.activationSpecClass = activationSpecClass;
	}

	/**
	 * Specify custom default properties, with String keys and String values.
	 * <p>Applied to each ActivationSpec object before it gets populated with
	 * listener-specific settings. Allows for configuring vendor-specific properties
	 * beyond the Spring-defined settings in {@link JmsActivationSpecConfig}.
	 */
	public void setDefaultProperties(Properties defaultProperties) {
		this.defaultProperties = defaultProperties;
	}

	/**
	 * Set the DestinationResolver to use for resolving destination names
	 * into the JCA 1.5 ActivationSpec "destination" property.
	 * <p>If not specified, destination names will simply be passed in as Strings.
	 * If specified, destination names will be resolved into Destination objects first.
	 * <p>Note that a DestinationResolver for use with this factory must be
	 * able to work <i>without an active JMS Session: e.g.
	 * {@link org.springframework.jms.support.destination.JndiDestinationResolver}
	 * or {@link org.springframework.jms.support.destination.BeanFactoryDestinationResolver}
	 * but not {@link org.springframework.jms.support.destination.DynamicDestinationResolver}.
	 */
	public void setDestinationResolver(DestinationResolver destinationResolver) {
		this.destinationResolver = destinationResolver;
	}


	public ActivationSpec createActivationSpec(ResourceAdapter adapter, JmsActivationSpecConfig config) {
		Class activationSpecClassToUse = this.activationSpecClass;
		if (activationSpecClassToUse == null) {
			activationSpecClassToUse = determineActivationSpecClass(adapter);
			if (activationSpecClassToUse == null) {
				throw new IllegalStateException("Property 'activationSpecClass' is required");
			}
		}

		ActivationSpec spec = (ActivationSpec) BeanUtils.instantiateClass(activationSpecClassToUse);
		BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(spec);
		if (this.defaultProperties != null) {
			bw.setPropertyValues(this.defaultProperties);
		}
		populateActivationSpecProperties(bw, config);
		return spec;
	}

	/**
	 * Determine the ActivationSpec class for the given ResourceAdapter,
	 * if possible. Called if no 'activationSpecClass' has been set explicitly
	 * @param adapter the ResourceAdapter to check
	 * @return the corresponding ActivationSpec class, or <code>null
	 * if not determinable
	 * @see #setActivationSpecClass
	 */
	protected Class determineActivationSpecClass(ResourceAdapter adapter) {
		return null;
	}

	/**
	 * Populate the given ApplicationSpec object with the settings
	 * defined in the given configuration object.
	 * <p>This implementation applies all standard JMS settings, but ignores
	 * "maxConcurrency" and "prefetchSize" - not supported in standard JCA 1.5.
	 * @param bw the BeanWrapper wrapping the ActivationSpec object
	 * @param config the configured object holding common JMS settings
	 */
	protected void populateActivationSpecProperties(BeanWrapper bw, JmsActivationSpecConfig config) {
		String destinationName = config.getDestinationName();
		boolean pubSubDomain = config.isPubSubDomain();
		Object destination = destinationName;
		if (this.destinationResolver != null) {
			try {
				destination = this.destinationResolver.resolveDestinationName(null, destinationName, pubSubDomain);
			}
			catch (JMSException ex) {
				throw new DestinationResolutionException("Cannot resolve destination name [" + destinationName + "]", ex);
			}
		}
		bw.setPropertyValue("destination", destination);
		bw.setPropertyValue("destinationType", pubSubDomain ? Topic.class.getName() : Queue.class.getName());

		if (bw.isWritableProperty("subscriptionDurability")) {
			bw.setPropertyValue("subscriptionDurability", config.isSubscriptionDurable() ? "Durable" : "NonDurable");
		}
		else if (config.isSubscriptionDurable()) {
			// Standard JCA 1.5 "subscriptionDurability" apparently not supported...
			throw new IllegalArgumentException(
					"Durable subscriptions not supported by underlying provider: " + this.activationSpecClass.getName());
		}
		if (config.getDurableSubscriptionName() != null) {
			bw.setPropertyValue("subscriptionName", config.getDurableSubscriptionName());
		}
		if (config.getClientId() != null) {
			bw.setPropertyValue("clientId", config.getClientId());
		}

		if (config.getMessageSelector() != null) {
			bw.setPropertyValue("messageSelector", config.getMessageSelector());
		}

		applyAcknowledgeMode(bw, config.getAcknowledgeMode());
	}

	/**
	 * Apply the specified acknowledge mode to the ActivationSpec object.
	 * <p>This implementation applies the standard JCA 1.5 acknowledge modes
	 * "Auto-acknowledge" and "Dups-ok-acknowledge". It throws an exception in
	 * case of <code>CLIENT_ACKNOWLEDGE or SESSION_TRANSACTED
	 * having been requested.
	 * @param bw the BeanWrapper wrapping the ActivationSpec object
	 * @param ackMode the configured acknowledge mode
	 * (according to the constants in {@link javax.jms.Session}
	 * @see javax.jms.Session#AUTO_ACKNOWLEDGE
	 * @see javax.jms.Session#DUPS_OK_ACKNOWLEDGE
	 * @see javax.jms.Session#CLIENT_ACKNOWLEDGE
	 * @see javax.jms.Session#SESSION_TRANSACTED
	 */
	protected void applyAcknowledgeMode(BeanWrapper bw, int ackMode) {
		if (ackMode == Session.SESSION_TRANSACTED) {
			throw new IllegalArgumentException("No support for SESSION_TRANSACTED: Only \"Auto-acknowledge\" " +
					"and \"Dups-ok-acknowledge\" supported in standard JCA 1.5");
		}
		else if (ackMode == Session.CLIENT_ACKNOWLEDGE) {
			throw new IllegalArgumentException("No support for CLIENT_ACKNOWLEDGE: Only \"Auto-acknowledge\" " +
					"and \"Dups-ok-acknowledge\" supported in standard JCA 1.5");
		}
		else if (bw.isWritableProperty("acknowledgeMode")) {
			bw.setPropertyValue("acknowledgeMode",
					ackMode == Session.DUPS_OK_ACKNOWLEDGE ? "Dups-ok-acknowledge" : "Auto-acknowledge");
		}
		else if (ackMode == Session.DUPS_OK_ACKNOWLEDGE) {
			// Standard JCA 1.5 "acknowledgeMode" apparently not supported (e.g. WebSphere MQ 6.0.2.1)
			throw new IllegalArgumentException(
					"Dups-ok-acknowledge not supported by underlying provider: " + this.activationSpecClass.getName());
		}
	}

}