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Spring Framework example source code file (JmsResourceHolder.java)

This example Spring Framework source code file (JmsResourceHolder.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

cannot, connection, connection, iterator, jmsexception, jmsresourceholder, jmsresourceholder, linkedlist, list, list, map, session, session, transactioninprogressexception, util

The Spring Framework JmsResourceHolder.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.connection;

import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

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

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

import org.springframework.transaction.support.ResourceHolderSupport;
import org.springframework.util.Assert;
import org.springframework.util.CollectionUtils;

/**
 * JMS resource holder, wrapping a JMS Connection and a JMS Session.
 * JmsTransactionManager binds instances of this class to the thread,
 * for a given JMS ConnectionFactory.
 *
 * <p>Note: This is an SPI class, not intended to be used by applications.
 *
 * @author Juergen Hoeller
 * @since 1.1
 * @see JmsTransactionManager
 * @see org.springframework.jms.core.JmsTemplate
 */
public class JmsResourceHolder extends ResourceHolderSupport {

	private static final Log logger = LogFactory.getLog(JmsResourceHolder.class);

	private ConnectionFactory connectionFactory;

	private boolean frozen = false;

	private final List connections = new LinkedList();

	private final List sessions = new LinkedList();

	private final Map sessionsPerConnection = new HashMap();


	/**
	 * Create a new JmsResourceHolder that is open for resources to be added.
	 * @see #addConnection
	 * @see #addSession
	 */
	public JmsResourceHolder() {
	}

	/**
	 * Create a new JmsResourceHolder that is open for resources to be added.
	 * @param connectionFactory the JMS ConnectionFactory that this
	 * resource holder is associated with (may be <code>null)
	 */
	public JmsResourceHolder(ConnectionFactory connectionFactory) {
		this.connectionFactory = connectionFactory;
	}

	/**
	 * Create a new JmsResourceHolder for the given JMS Session.
	 * @param session the JMS Session
	 */
	public JmsResourceHolder(Session session) {
		addSession(session);
		this.frozen = true;
	}

	/**
	 * Create a new JmsResourceHolder for the given JMS resources.
	 * @param connection the JMS Connection
	 * @param session the JMS Session
	 */
	public JmsResourceHolder(Connection connection, Session session) {
		addConnection(connection);
		addSession(session, connection);
		this.frozen = true;
	}

	/**
	 * Create a new JmsResourceHolder for the given JMS resources.
	 * @param connectionFactory the JMS ConnectionFactory that this
	 * resource holder is associated with (may be <code>null)
	 * @param connection the JMS Connection
	 * @param session the JMS Session
	 */
	public JmsResourceHolder(ConnectionFactory connectionFactory, Connection connection, Session session) {
		this.connectionFactory = connectionFactory;
		addConnection(connection);
		addSession(session, connection);
		this.frozen = true;
	}


	public final boolean isFrozen() {
		return this.frozen;
	}

	public final void addConnection(Connection connection) {
		Assert.isTrue(!this.frozen, "Cannot add Connection because JmsResourceHolder is frozen");
		Assert.notNull(connection, "Connection must not be null");
		if (!this.connections.contains(connection)) {
			this.connections.add(connection);
		}
	}

	public final void addSession(Session session) {
		addSession(session, null);
	}

	public final void addSession(Session session, Connection connection) {
		Assert.isTrue(!this.frozen, "Cannot add Session because JmsResourceHolder is frozen");
		Assert.notNull(session, "Session must not be null");
		if (!this.sessions.contains(session)) {
			this.sessions.add(session);
			if (connection != null) {
				List sessions = (List) this.sessionsPerConnection.get(connection);
				if (sessions == null) {
					sessions = new LinkedList();
					this.sessionsPerConnection.put(connection, sessions);
				}
				sessions.add(session);
			}
		}
	}

	public boolean containsSession(Session session) {
		return this.sessions.contains(session);
	}


	public Connection getConnection() {
		return (!this.connections.isEmpty() ? (Connection) this.connections.get(0) : null);
	}

	public Connection getConnection(Class connectionType) {
		return (Connection) CollectionUtils.findValueOfType(this.connections, connectionType);
	}

	public Session getSession() {
		return (!this.sessions.isEmpty() ? (Session) this.sessions.get(0) : null);
	}

	public Session getSession(Class sessionType) {
		return getSession(sessionType, null);
	}

	public Session getSession(Class sessionType, Connection connection) {
		List sessions = this.sessions;
		if (connection != null) {
			sessions = (List) this.sessionsPerConnection.get(connection);
		}
		return (Session) CollectionUtils.findValueOfType(sessions, sessionType);
	}


	public void commitAll() throws JMSException {
		for (Iterator it = this.sessions.iterator(); it.hasNext();) {
			try {
				((Session) it.next()).commit();
			}
			catch (TransactionInProgressException ex) {
				// Ignore -> can only happen in case of a JTA transaction.
			}
			catch (javax.jms.IllegalStateException ex) {
				// Ignore -> can only happen in case of a JTA transaction.
			}
		}
	}

	public void closeAll() {
		for (Iterator it = this.sessions.iterator(); it.hasNext();) {
			try {
				((Session) it.next()).close();
			}
			catch (Throwable ex) {
				logger.debug("Could not close synchronized JMS Session after transaction", ex);
			}
		}
		for (Iterator it = this.connections.iterator(); it.hasNext();) {
			Connection con = (Connection) it.next();
			ConnectionFactoryUtils.releaseConnection(con, this.connectionFactory, true);
		}
	}

}

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