org.apache.activemq

Class ActiveMQConnectionConsumer

java.lang.Object

org.apache.activemq.ActiveMQConnectionConsumer

All Implemented Interfaces:

ConnectionConsumer, ActiveMQDispatcher

public class ActiveMQConnectionConsumer
extends Object
implements ConnectionConsumer, ActiveMQDispatcher

For application servers, Connection objects provide a special facility for creating a ConnectionConsumer (optional). The messages it is to consume are specified by a Destination and a message selector. In addition, a ConnectionConsumer must be given a ServerSessionPool to use for processing its messages.

Normally, when traffic is light, a ConnectionConsumer gets a ServerSession from its pool, loads it with a single message, and starts it. As traffic picks up, messages can back up. If this happens, a ConnectionConsumer can load each ServerSession with more than one message. This reduces the thread context switches and minimizes resource use at the expense of some serialization of message processing.

See Also:

Connection.createConnectionConsumer(javax.jms.Destination, java.lang.String, javax.jms.ServerSessionPool, int), Connection.createDurableConnectionConsumer(javax.jms.Topic, java.lang.String, java.lang.String, javax.jms.ServerSessionPool, int), QueueConnection.createConnectionConsumer(javax.jms.Queue, java.lang.String, javax.jms.ServerSessionPool, int), TopicConnection.createConnectionConsumer(javax.jms.Topic, java.lang.String, javax.jms.ServerSessionPool, int), TopicConnection.createDurableConnectionConsumer(javax.jms.Topic, java.lang.String, java.lang.String, javax.jms.ServerSessionPool, int)

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ActiveMQConnectionConsumer(ActiveMQConnection theConnection, ServerSessionPool theSessionPool, ConsumerInfo theConsumerInfo) Create a ConnectionConsumer

Method Summary

Modifier and Type	Method and Description
void	clearMessagesInProgress(AtomicInteger transportInterruptionProcessingComplete)
void	close() Closes the connection consumer.
void	dispatch(MessageDispatch messageDispatch)
void	dispose()
ConsumerInfo	getConsumerInfo()
ServerSessionPool	getServerSessionPool() Gets the server session pool associated with this connection consumer.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ActiveMQConnectionConsumer

protected ActiveMQConnectionConsumer(ActiveMQConnection theConnection,
                                     ServerSessionPool theSessionPool,
                                     ConsumerInfo theConsumerInfo)
                              throws JMSException

Create a ConnectionConsumer

Parameters:

theConnection -

theSessionPool -

theConsumerInfo -

Throws:

JMSException

Method Detail

getServerSessionPool

public ServerSessionPool getServerSessionPool()
                                       throws JMSException

Gets the server session pool associated with this connection consumer.

Specified by:

getServerSessionPool in interface ConnectionConsumer

Returns:

the server session pool used by this connection consumer

Throws:

JMSException - if the JMS provider fails to get the server session pool associated with this consumer due to some internal error.

close

public void close()
           throws JMSException

Closes the connection consumer.

Since a provider may allocate some resources on behalf of a connection consumer outside the Java virtual machine, clients should close these resources when they are not needed. Relying on garbage collection to eventually reclaim these resources may not be timely enough.

Specified by:

close in interface ConnectionConsumer

Throws:

JMSException

dispose

public void dispose()

dispatch

public void dispatch(MessageDispatch messageDispatch)

Specified by:

dispatch in interface ActiveMQDispatcher

toString

public String toString()

Overrides:

toString in class Object

clearMessagesInProgress

public void clearMessagesInProgress(AtomicInteger transportInterruptionProcessingComplete)

getConsumerInfo

public ConsumerInfo getConsumerInfo()