Package org.apache.activemq.advisory

Class ConsumerEventSource

java.lang.Object

org.apache.activemq.advisory.ConsumerEventSource

All Implemented Interfaces:

javax.jms.MessageListener, Service

public class ConsumerEventSource
extends Object
implements Service, javax.jms.MessageListener

An object which can be used to listen to the number of active consumers available on a given destination.

Constructor Summary

Constructors

Constructor	Description
ConsumerEventSource(javax.jms.Connection connection, javax.jms.Destination destination)

Method Summary

Modifier and Type	Method	Description
protected int	extractConsumerCountFromMessage(javax.jms.Message message, int count)	Lets rely by default on the broker telling us what the consumer count is as it can ensure that we are up to date at all times and have not received messages out of order etc.
protected void	fireConsumerEvent(ConsumerEvent event)
String	getConsumerId()
void	onMessage(javax.jms.Message message)
void	setConsumerListener(ConsumerListener listener)
void	start()
void	stop()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ConsumerEventSource

public ConsumerEventSource(javax.jms.Connection connection,
                           javax.jms.Destination destination)
                    throws javax.jms.JMSException

Throws:

javax.jms.JMSException

Method Detail

setConsumerListener

public void setConsumerListener(ConsumerListener listener)

getConsumerId

public String getConsumerId()

start

public void start()
           throws Exception

Specified by:

start in interface Service

Throws:

Exception

stop

public void stop()
          throws Exception

Specified by:

stop in interface Service

Throws:

Exception

onMessage

public void onMessage(javax.jms.Message message)

Specified by:

onMessage in interface javax.jms.MessageListener

extractConsumerCountFromMessage

protected int extractConsumerCountFromMessage(javax.jms.Message message,
                                              int count)

Lets rely by default on the broker telling us what the consumer count is as it can ensure that we are up to date at all times and have not received messages out of order etc.

fireConsumerEvent

protected void fireConsumerEvent(ConsumerEvent event)