/*
* Copyright 2002-2010 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.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<Connection> connections = new LinkedList<Connection>();
private final List<Session> sessions = new LinkedList<Session>();
private final Map<Connection, List<Session>> sessionsPerConnection =
new HashMap<Connection, List<Session>>();
/**
* 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</code>)
*/
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</code>)
* @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<Session> sessions = this.sessionsPerConnection.get(connection);
if (sessions == null) {
sessions = new LinkedList<Session>();
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() ? this.connections.get(0) : null);
}
public Connection getConnection(Class<? extends Connection> connectionType) {
return CollectionUtils.findValueOfType(this.connections, connectionType);
}
public Session getSession() {
return (!this.sessions.isEmpty() ? this.sessions.get(0) : null);
}
public Session getSession(Class<? extends Session> sessionType) {
return getSession(sessionType, null);
}
public Session getSession(Class<? extends Session> sessionType, Connection connection) {
List<Session> sessions = this.sessions;
if (connection != null) {
sessions = this.sessionsPerConnection.get(connection);
}
return CollectionUtils.findValueOfType(sessions, sessionType);
}
public void commitAll() throws JMSException {
for (Session session : this.sessions) {
try {
session.commit();
}
catch (TransactionInProgressException ex) {
// Ignore -> can only happen in case of a JTA transaction.
}
// Let IllegalStateException through: It might point out an unexpectedly closed session.
}
}
public void closeAll() {
for (Session session : this.sessions) {
try {
session.close();
}
catch (Throwable ex) {
logger.debug("Could not close synchronized JMS Session after transaction", ex);
}
}
for (Connection con : this.connections) {
ConnectionFactoryUtils.releaseConnection(con, this.connectionFactory, true);
}
this.connections.clear();
this.sessions.clear();
this.sessionsPerConnection.clear();
}
}
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