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/*
* 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.example.publisher;
import org.apache.qpid.client.BasicMessageProducer;
import org.slf4j.LoggerFactory;
import org.slf4j.Logger;
import javax.jms.DeliveryMode;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Session;
/**
* Subclass of Publisher which uses QPID functionality to send a heartbeat message Note immediate flag not available via
* JMS MessageProducer
*/
public class MonitorPublisher extends Publisher
{
private static final Logger _log = LoggerFactory.getLogger(Publisher.class);
BasicMessageProducer _producer;
public MonitorPublisher()
{
super();
}
/*
* Publishes a message using given details
*/
public boolean sendMessage(Session session, Message message, int deliveryMode,
boolean immediate, boolean commit) throws UndeliveredMessageException
{
try
{
_producer = (BasicMessageProducer) session.createProducer(_destination);
_producer.send(message, deliveryMode, immediate);
if (commit)
{
//commit the message send and close the transaction
_session.commit();
}
}
catch (JMSException e)
{
//Have to assume our commit failed but do not rollback here as channel closed
_log.error("JMSException", e);
e.printStackTrace();
throw new UndeliveredMessageException("Cannot deliver immediate message", e);
}
_log.info(_name + " finished sending message: " + message);
return true;
}
/*
* Publishes a non-persistent message using transacted session
*/
public boolean sendImmediateMessage(Message message) throws UndeliveredMessageException
{
try
{
_producer = (BasicMessageProducer) _session.createProducer(_destination);
//Send message via our producer which is not persistent and is immediate
//NB: not available via jms interface MessageProducer
_producer.send(message, DeliveryMode.NON_PERSISTENT, true);
//commit the message send and close the transaction
_session.commit();
}
catch (JMSException e)
{
//Have to assume our commit failed but do not rollback here as channel closed
_log.error("JMSException", e);
e.printStackTrace();
throw new UndeliveredMessageException("Cannot deliver immediate message", e);
}
_log.info(_name + " finished sending message: " + message);
return true;
}
}
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