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/*
 * 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.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;

/**
 * Connection holder, wrapping a JMS Connection and a JMS Session.
 * JmsTransactionManager binds instances of this class to the thread,
 * for a given JMS ConnectionFactory.
 *
 * 

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 boolean frozen; private final ConnectionFactory connectionFactory; 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() { this(null); } /** * 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 null) */ public JmsResourceHolder(ConnectionFactory connectionFactory) { this.connectionFactory = connectionFactory; this.frozen = false; } /** * 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) { this(null, connection, session); } /** * Create a new JmsResourceHolder for the given JMS resources. * @param connectionFactory the JMS ConnectionFactory that this * resource holder is associated with (may be 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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