/**
* 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.cxf.wsn.jms;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.jms.Connection;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.Topic;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import org.apache.activemq.advisory.ConsumerEvent;
import org.apache.activemq.advisory.ConsumerEventSource;
import org.apache.activemq.advisory.ConsumerListener;
import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.wsn.AbstractPublisher;
import org.oasis_open.docs.wsn.b_2.InvalidTopicExpressionFaultType;
import org.oasis_open.docs.wsn.b_2.NotificationMessageHolderType;
import org.oasis_open.docs.wsn.b_2.Notify;
import org.oasis_open.docs.wsn.b_2.TopicExpressionType;
import org.oasis_open.docs.wsn.br_2.PublisherRegistrationFailedFaultType;
import org.oasis_open.docs.wsn.br_2.RegisterPublisher;
import org.oasis_open.docs.wsn.br_2.ResourceNotDestroyedFaultType;
import org.oasis_open.docs.wsn.brw_2.PublisherRegistrationFailedFault;
import org.oasis_open.docs.wsn.brw_2.PublisherRegistrationRejectedFault;
import org.oasis_open.docs.wsn.brw_2.ResourceNotDestroyedFault;
import org.oasis_open.docs.wsn.bw_2.InvalidTopicExpressionFault;
import org.oasis_open.docs.wsn.bw_2.TopicNotSupportedFault;
import org.oasis_open.docs.wsrf.rw_2.ResourceUnknownFault;
public abstract class JmsPublisher extends AbstractPublisher implements ConsumerListener {
private static final Logger LOGGER = LogUtils.getL7dLogger(JmsPublisher.class);
private Connection connection;
private JmsTopicExpressionConverter topicConverter;
private JAXBContext jaxbContext;
private List<ConsumerEventSource> advisories;
private Map<Destination, Object> producers;
public JmsPublisher(String name) {
super(name);
topicConverter = new JmsTopicExpressionConverter();
try {
jaxbContext = JAXBContext.newInstance(Notify.class);
} catch (JAXBException e) {
throw new RuntimeException("Unable to create JAXB context", e);
}
}
public Connection getConnection() {
return connection;
}
public void setConnection(Connection connection) {
this.connection = connection;
}
@Override
public void notify(NotificationMessageHolderType messageHolder) {
Session session = null;
try {
Topic topic = topicConverter.toActiveMQTopic(messageHolder.getTopic());
session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
MessageProducer producer = session.createProducer(topic);
Notify notify = new Notify();
notify.getNotificationMessage().add(messageHolder);
StringWriter writer = new StringWriter();
jaxbContext.createMarshaller().marshal(notify, writer);
Message message = session.createTextMessage(writer.toString());
producer.send(message);
} catch (JMSException e) {
LOGGER.log(Level.WARNING, "Error dispatching message", e);
} catch (JAXBException e) {
LOGGER.log(Level.WARNING, "Error dispatching message", e);
} catch (InvalidTopicException e) {
LOGGER.log(Level.WARNING, "Error dispatching message", e);
} finally {
if (session != null) {
try {
session.close();
} catch (JMSException e) {
LOGGER.log(Level.FINE, "Error closing session", e);
}
}
}
}
@Override
protected void validatePublisher(RegisterPublisher registerPublisherRequest)
throws InvalidTopicExpressionFault, PublisherRegistrationFailedFault,
PublisherRegistrationRejectedFault, ResourceUnknownFault,
TopicNotSupportedFault {
super.validatePublisher(registerPublisherRequest);
try {
topicConverter.toActiveMQTopic(topic);
} catch (InvalidTopicException e) {
InvalidTopicExpressionFaultType fault = new InvalidTopicExpressionFaultType();
throw new InvalidTopicExpressionFault(e.getMessage(), fault);
}
}
@Override
protected void start() throws PublisherRegistrationFailedFault {
if (demand) {
try {
producers = new HashMap<Destination, Object>();
advisories = new ArrayList<ConsumerEventSource>();
for (TopicExpressionType topic : this.topic) {
ConsumerEventSource advisory
= new ConsumerEventSource(connection, topicConverter.toActiveMQTopic(topic));
advisory.setConsumerListener(this);
advisory.start();
advisories.add(advisory);
}
} catch (Exception e) {
PublisherRegistrationFailedFaultType fault = new PublisherRegistrationFailedFaultType();
throw new PublisherRegistrationFailedFault("Error starting demand-based publisher", fault, e);
}
}
}
protected void destroy() throws ResourceNotDestroyedFault {
try {
if (advisories != null) {
for (ConsumerEventSource advisory : advisories) {
advisory.stop();
}
}
} catch (Exception e) {
ResourceNotDestroyedFaultType fault = new ResourceNotDestroyedFaultType();
throw new ResourceNotDestroyedFault("Error destroying publisher", fault, e);
} finally {
super.destroy();
}
}
public synchronized void onConsumerEvent(ConsumerEvent event) {
Object producer = producers.get(event.getDestination());
if (event.getConsumerCount() > 0) {
if (producer == null) {
// start subscription
producer = startSubscription(topicConverter.toTopicExpression((Topic)event.getDestination()));
producers.put(event.getDestination(), producer);
}
} else {
if (producer != null) {
Object sub = producers.remove(event.getDestination());
// destroy subscription
stopSubscription(sub);
}
}
}
protected abstract Object startSubscription(TopicExpressionType topic);
protected abstract void stopSubscription(Object sub);
}