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The core JMS Client implementation
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.qpid.jms;
import java.io.Serializable;
import java.util.concurrent.atomic.AtomicLong;
import jakarta.jms.BytesMessage;
import jakarta.jms.ConnectionMetaData;
import jakarta.jms.Destination;
import jakarta.jms.ExceptionListener;
import jakarta.jms.IllegalStateRuntimeException;
import jakarta.jms.JMSConsumer;
import jakarta.jms.JMSContext;
import jakarta.jms.JMSException;
import jakarta.jms.JMSProducer;
import jakarta.jms.JMSRuntimeException;
import jakarta.jms.MapMessage;
import jakarta.jms.Message;
import jakarta.jms.ObjectMessage;
import jakarta.jms.Queue;
import jakarta.jms.QueueBrowser;
import jakarta.jms.Session;
import jakarta.jms.StreamMessage;
import jakarta.jms.TemporaryQueue;
import jakarta.jms.TemporaryTopic;
import jakarta.jms.TextMessage;
import jakarta.jms.Topic;
import org.apache.qpid.jms.exceptions.JmsExceptionSupport;
import org.apache.qpid.jms.provider.ProviderConstants.ACK_TYPE;
public class JmsContext implements JMSContext, AutoCloseable {
private final JmsConnection connection;
private final AtomicLong connectionRefCount;
private final int sessionMode;
private JmsSession session;
private JmsMessageProducer sharedProducer;
private boolean autoStart = true;
public JmsContext(JmsConnection connection, int sessionMode) {
this(connection, sessionMode, new AtomicLong(1));
}
private JmsContext(JmsConnection connection, int sessionMode, AtomicLong connectionRefCount) {
this.connection = connection;
this.sessionMode = sessionMode;
this.connectionRefCount = connectionRefCount;
}
@Override
public void start() {
try {
connection.start();
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public void stop() {
try {
connection.stop();
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public synchronized void close() {
JMSRuntimeException failure = null;
try {
if (session != null) {
session.close();
}
} catch (JMSException jmse) {
failure = JmsExceptionSupport.createRuntimeException(jmse);
}
if (connectionRefCount.decrementAndGet() == 0) {
try {
connection.close();
} catch (JMSException jmse) {
if (failure == null) {
failure = JmsExceptionSupport.createRuntimeException(jmse);
}
}
}
if (failure != null) {
throw failure;
}
}
//----- Session state management -----------------------------------------//
@Override
public void acknowledge() {
if (getSessionMode() == Session.CLIENT_ACKNOWLEDGE) {
try {
getSession().acknowledge(ACK_TYPE.ACCEPTED);
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
}
@Override
public void commit() {
try {
getSession().commit();
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public void rollback() {
try {
getSession().rollback();
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public void recover() {
try {
getSession().recover();
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public void unsubscribe(String name) {
try {
getSession().unsubscribe(name);
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
//----- Message Factory methods ------------------------------------------//
@Override
public BytesMessage createBytesMessage() {
try {
return getSession().createBytesMessage();
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public MapMessage createMapMessage() {
try {
return getSession().createMapMessage();
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public Message createMessage() {
try {
return getSession().createMessage();
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public ObjectMessage createObjectMessage() {
try {
return getSession().createObjectMessage();
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public ObjectMessage createObjectMessage(Serializable object) {
try {
return getSession().createObjectMessage(object);
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public StreamMessage createStreamMessage() {
try {
return getSession().createStreamMessage();
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public TextMessage createTextMessage() {
try {
return getSession().createTextMessage();
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public TextMessage createTextMessage(String text) {
try {
return getSession().createTextMessage(text);
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
//----- Destination Creation ---------------------------------------------//
@Override
public Queue createQueue(String queueName) {
try {
return getSession().createQueue(queueName);
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public Topic createTopic(String topicName) {
try {
return getSession().createTopic(topicName);
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public TemporaryQueue createTemporaryQueue() {
try {
return getSession().createTemporaryQueue();
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public TemporaryTopic createTemporaryTopic() {
try {
return getSession().createTemporaryTopic();
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
//----- JMSContext factory methods --------------------------------------//
@Override
public synchronized JMSContext createContext(int sessionMode) {
if (connectionRefCount.get() == 0) {
throw new IllegalStateRuntimeException("The Connection is closed");
}
JmsSession.validateSessionMode(sessionMode);
connectionRefCount.incrementAndGet();
return new JmsContext(connection, sessionMode, connectionRefCount);
}
//----- JMSProducer factory methods --------------------------------------//
@Override
public JMSProducer createProducer() {
try {
if (sharedProducer == null) {
synchronized (this) {
if (sharedProducer == null) {
sharedProducer = (JmsMessageProducer) getSession().createProducer(null);
}
}
}
return new JmsProducer(getSession(), sharedProducer);
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
//----- JMSConsumer factory methods --------------------------------------//
@Override
public JMSConsumer createConsumer(Destination destination) {
try {
return startIfNeeded(new JmsConsumer(getSession(), (JmsMessageConsumer) getSession().createConsumer(destination)));
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public JMSConsumer createConsumer(Destination destination, String selector) {
try {
return startIfNeeded(new JmsConsumer(getSession(), (JmsMessageConsumer) getSession().createConsumer(destination, selector)));
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public JMSConsumer createConsumer(Destination destination, String selector, boolean noLocal) {
try {
return startIfNeeded(new JmsConsumer(getSession(), (JmsMessageConsumer) getSession().createConsumer(destination, selector, noLocal)));
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public JMSConsumer createDurableConsumer(Topic topic, String name) {
try {
return startIfNeeded(new JmsConsumer(getSession(), (JmsMessageConsumer) getSession().createDurableConsumer(topic, name)));
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public JMSConsumer createDurableConsumer(Topic topic, String name, String selector, boolean noLocal) {
try {
return startIfNeeded(new JmsConsumer(getSession(), (JmsMessageConsumer) getSession().createDurableConsumer(topic, name, selector, noLocal)));
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public JMSConsumer createSharedConsumer(Topic topic, String name) {
try {
return startIfNeeded(new JmsConsumer(getSession(), (JmsMessageConsumer) getSession().createSharedConsumer(topic, name)));
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public JMSConsumer createSharedConsumer(Topic topic, String name, String selector) {
try {
return startIfNeeded(new JmsConsumer(getSession(), (JmsMessageConsumer) getSession().createSharedConsumer(topic, name, selector)));
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public JMSConsumer createSharedDurableConsumer(Topic topic, String name) {
try {
return startIfNeeded(new JmsConsumer(getSession(), (JmsMessageConsumer) getSession().createSharedDurableConsumer(topic, name)));
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public JMSConsumer createSharedDurableConsumer(Topic topic, String name, String selector) {
try {
return startIfNeeded(new JmsConsumer(getSession(), (JmsMessageConsumer) getSession().createSharedDurableConsumer(topic, name, selector)));
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
//----- QueueBrowser Factory Methods -------------------------------------//
@Override
public QueueBrowser createBrowser(Queue queue) {
try {
return startIfNeeded(getSession().createBrowser(queue));
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public QueueBrowser createBrowser(Queue queue, String selector) {
try {
return startIfNeeded(getSession().createBrowser(queue, selector));
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
//----- Get or Set Context and Session values ----------------------------//
@Override
public boolean getAutoStart() {
return autoStart;
}
@Override
public void setAutoStart(boolean autoStart) {
this.autoStart = autoStart;
}
@Override
public String getClientID() {
try {
return connection.getClientID();
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public void setClientID(String clientID) {
try {
connection.setClientID(clientID);
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public ExceptionListener getExceptionListener() {
try {
return connection.getExceptionListener();
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public void setExceptionListener(ExceptionListener listener) {
try {
connection.setExceptionListener(listener);
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public ConnectionMetaData getMetaData() {
try {
return connection.getMetaData();
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
@Override
public int getSessionMode() {
return sessionMode;
}
@Override
public boolean getTransacted() {
return sessionMode == JMSContext.SESSION_TRANSACTED;
}
//----- Internal implementation methods ----------------------------------//
private JmsSession getSession() {
if (session == null) {
synchronized (this) {
if (session == null) {
try {
session = (JmsSession) connection.createSession(getSessionMode());
} catch (JMSException jmse) {
throw JmsExceptionSupport.createRuntimeException(jmse);
}
}
}
}
return session;
}
private QueueBrowser startIfNeeded(QueueBrowser browser) throws JMSException {
if (getAutoStart()) {
connection.start();
}
return browser;
}
private JmsConsumer startIfNeeded(JmsConsumer consumer) throws JMSException {
if (getAutoStart()) {
connection.start();
}
return consumer;
}
}