javax.jms
Class QueueRequestor

java.lang.Object

  |

  +--javax.jms.QueueRequestor

public class QueueRequestor

extends java.lang.Object

JMS provides a QueueRequestor helper class to simplify making service requests.

The QueueRequestor constructor is given a QueueSession and a destination Queue. It creates a TemporaryQueue for the responses and provides a request() method that sends the request message and waits for its reply.

This is a basic request/reply abstraction that should be sufficient for most uses. JMS providers and clients are free to create more sophisticated versions.

Version:

1.0 - 8 July 1998

Author:

Mark Hapner, Rich Burridge

See Also:

TopicRequestor

Constructor Summary

QueueRequestor(QueueSession session, Queue queue)
Constructor for the QueueRequestor class.

Method Summary

void	close() Since a provider may allocate some resources on behalf of a QueueRequestor outside the JVM, clients should close them when they are not needed.
Message	request(Message message) Send a request and wait for a reply.

Methods inherited from class java.lang.Object

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

Constructor Detail

QueueRequestor

public QueueRequestor(QueueSession session,

                      Queue queue)

               throws JMSException

Constructor for the QueueRequestor class.

Parameters:

session - the queue session the queue belongs to.

queue - the queue to perform the request/reply call on.

Throws:

JMSException - if a JMS error occurs.

Method Detail

request

public Message request(Message message)

                throws JMSException

Send a request and wait for a reply. The temporary queue is used for replyTo, and only one reply per request is expected.

Parameters:

message - the message to send.

Returns:

the reply message.

Throws:

JMSException - if a JMS error occurs.

close

public void close()

           throws JMSException

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

Throws:

JMSException - if a JMS error occurs.