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Spring Framework example source code file (JmsAccessor.java)

This example Spring Framework source code file (JmsAccessor.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

connection, connection, connectionfactory, connectionfactory, constants, illegalargumentexception, initializingbean, initializingbean, jmsaccessor, jmsexception, jmsexception, log, property, session

The Spring Framework JmsAccessor.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.support;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.Session;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.beans.factory.InitializingBean;
import org.springframework.core.Constants;
import org.springframework.jms.JmsException;

/**
 * Base class for {@link org.springframework.jms.core.JmsTemplate} and other
 * JMS-accessing gateway helpers, defining common properties such as the
 * JMS {@link ConnectionFactory} to operate on. The subclass
 * {@link org.springframework.jms.support.destination.JmsDestinationAccessor}
 * adds further, destination-related properties.
 *
 * <p>Not intended to be used directly.
 * See {@link org.springframework.jms.core.JmsTemplate}.
 *
 * @author Juergen Hoeller
 * @since 1.2
 * @see org.springframework.jms.support.destination.JmsDestinationAccessor
 * @see org.springframework.jms.core.JmsTemplate
 */
public abstract class JmsAccessor implements InitializingBean {

	/** Constants instance for javax.jms.Session */
	private static final Constants sessionConstants = new Constants(Session.class);


	/** Logger available to subclasses */
	protected final Log logger = LogFactory.getLog(getClass());

	private ConnectionFactory connectionFactory;

	private boolean sessionTransacted = false;

	private int sessionAcknowledgeMode = Session.AUTO_ACKNOWLEDGE;


	/**
	 * Set the ConnectionFactory to use for obtaining JMS {@link Connection Connections}.
	 */
	public void setConnectionFactory(ConnectionFactory connectionFactory) {
		this.connectionFactory = connectionFactory;
	}

	/**
	 * Return the ConnectionFactory that this accessor uses for obtaining
	 * JMS {@link Connection Connections}.
	 */
	public ConnectionFactory getConnectionFactory() {
		return this.connectionFactory;
	}

	/**
	 * Set the transaction mode that is used when creating a JMS {@link Session}.
	 * Default is "false".
	 * <p>Note that within a JTA transaction, the parameters passed to
	 * <code>create(Queue/Topic)Session(boolean transacted, int acknowledgeMode)
	 * method are not taken into account. Depending on the J2EE transaction context,
	 * the container makes its own decisions on these values. Analogously, these
	 * parameters are not taken into account within a locally managed transaction
	 * either, since the accessor operates on an existing JMS Session in this case.
	 * <p>Setting this flag to "true" will use a short local JMS transaction
	 * when running outside of a managed transaction, and a synchronized local
	 * JMS transaction in case of a managed transaction (other than an XA
	 * transaction) being present. The latter has the effect of a local JMS
	 * transaction being managed alongside the main transaction (which might
	 * be a native JDBC transaction), with the JMS transaction committing
	 * right after the main transaction.
	 * @see javax.jms.Connection#createSession(boolean, int)
	 */
	public void setSessionTransacted(boolean sessionTransacted) {
		this.sessionTransacted = sessionTransacted;
	}

	/**
	 * Return whether the JMS {@link Session sessions} used by this
	 * accessor are supposed to be transacted.
	 * @see #setSessionTransacted(boolean)
	 */
	public boolean isSessionTransacted() {
		return this.sessionTransacted;
	}

	/**
	 * Set the JMS acknowledgement mode by the name of the corresponding constant
	 * in the JMS {@link Session} interface, e.g. "CLIENT_ACKNOWLEDGE".
	 * <p>If you want to use vendor-specific extensions to the acknowledgment mode,
	 * use {@link #setSessionAcknowledgeModeName(String)} instead.
	 * @param constantName the name of the {@link Session} acknowledge mode constant
	 * @see javax.jms.Session#AUTO_ACKNOWLEDGE
	 * @see javax.jms.Session#CLIENT_ACKNOWLEDGE
	 * @see javax.jms.Session#DUPS_OK_ACKNOWLEDGE
	 * @see javax.jms.Connection#createSession(boolean, int)
	 */
	public void setSessionAcknowledgeModeName(String constantName) {
		setSessionAcknowledgeMode(sessionConstants.asNumber(constantName).intValue());
	}

	/**
	 * Set the JMS acknowledgement mode that is used when creating a JMS
	 * {@link Session} to send a message.
	 * <p>Default is {@link Session#AUTO_ACKNOWLEDGE}.
	 * <p>Vendor-specific extensions to the acknowledgment mode can be set here as well.
	 * <p>Note that that inside an EJB the parameters to
	 * create(Queue/Topic)Session(boolean transacted, int acknowledgeMode) method
	 * are not taken into account. Depending on the transaction context in the EJB,
	 * the container makes its own decisions on these values. See section 17.3.5
	 * of the EJB spec.
	 * @param sessionAcknowledgeMode the acknowledgement mode constant
	 * @see javax.jms.Session#AUTO_ACKNOWLEDGE
	 * @see javax.jms.Session#CLIENT_ACKNOWLEDGE
	 * @see javax.jms.Session#DUPS_OK_ACKNOWLEDGE
	 * @see javax.jms.Connection#createSession(boolean, int)
	 */
	public void setSessionAcknowledgeMode(int sessionAcknowledgeMode) {
		this.sessionAcknowledgeMode = sessionAcknowledgeMode;
	}

	/**
	 * Return the acknowledgement mode for JMS {@link Session sessions}.
	 */
	public int getSessionAcknowledgeMode() {
		return this.sessionAcknowledgeMode;
	}

	public void afterPropertiesSet() {
		if (getConnectionFactory() == null) {
			throw new IllegalArgumentException("Property 'connectionFactory' is required");
		}
	}


	/**
	 * Convert the specified checked {@link javax.jms.JMSException JMSException} to
	 * a Spring runtime {@link org.springframework.jms.JmsException JmsException}
	 * equivalent.
	 * <p>The default implementation delegates to the
	 * {@link org.springframework.jms.support.JmsUtils#convertJmsAccessException} method.
	 * @param ex the original checked {@link JMSException} to convert
	 * @return the Spring runtime {@link JmsException} wrapping <code>ex
	 * @see org.springframework.jms.support.JmsUtils#convertJmsAccessException
	 */
	protected JmsException convertJmsAccessException(JMSException ex) {
		return JmsUtils.convertJmsAccessException(ex);
	}


	//-------------------------------------------------------------------------
	// JMS 1.1 factory methods, potentially overridden for JMS 1.0.2
	//-------------------------------------------------------------------------

	/**
	 * Create a JMS Connection via this template's ConnectionFactory.
	 * <p>This implementation uses JMS 1.1 API.
	 * @return the new JMS Connection
	 * @throws JMSException if thrown by JMS API methods
	 * @see javax.jms.ConnectionFactory#createConnection()
	 */
	protected Connection createConnection() throws JMSException {
		return getConnectionFactory().createConnection();
	}

	/**
	 * Create a JMS Session for the given Connection.
	 * <p>This implementation uses JMS 1.1 API.
	 * @param con the JMS Connection to create a Session for
	 * @return the new JMS Session
	 * @throws JMSException if thrown by JMS API methods
	 * @see javax.jms.Connection#createSession(boolean, int)
	 */
	protected Session createSession(Connection con) throws JMSException {
		return con.createSession(isSessionTransacted(), getSessionAcknowledgeMode());
	}

	/**
	 * Determine whether the given Session is in client acknowledge mode.
	 * <p>This implementation uses JMS 1.1 API.
	 * @param session the JMS Session to check
	 * @return whether the given Session is in client acknowledge mode
	 * @throws javax.jms.JMSException if thrown by JMS API methods
	 * @see javax.jms.Session#getAcknowledgeMode()
	 * @see javax.jms.Session#CLIENT_ACKNOWLEDGE
	 */
	protected boolean isClientAcknowledge(Session session) throws JMSException {
		return (session.getAcknowledgeMode() == Session.CLIENT_ACKNOWLEDGE);
	}

}

Other Spring Framework examples (source code examples)

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