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Java Source Code / Java Documentation » 6.0 JDK Modules » JMS » javax.jms

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

javax.jms .QueueRequestor

QueueRequestor

public class QueueRequestor (Code)

The QueueRequestor helper class simplifies making service requests.

The QueueRequestor constructor is given a non-transacted 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
author:
   Rich Burridge
See Also:   javax.jms.TopicRequestor

Field Summary
Queue	queue
QueueReceiver	receiver
QueueSender	sender
QueueSession	session
TemporaryQueue	tempQueue

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

Method Summary
public void	close() Closes the `QueueRequestor` and its session. Since a provider may allocate some resources on behalf of a `QueueRequestor` outside the Java virtual machine, clients should close them when they are not needed.
public Message	request(Message message) Sends a request and waits for a reply.

Field Detail

queue
Queue queue(Code)

receiver
QueueReceiver receiver(Code)

sender
QueueSender sender(Code)

session
QueueSession session(Code)

tempQueue
TemporaryQueue tempQueue(Code)

Constructor Detail

QueueRequestor
public QueueRequestor(QueueSession session, Queue queue) throws JMSException(Code)
	Constructor for the `QueueRequestor` class. This implementation assumes the session parameter to be non-transacted, with a delivery mode of either `AUTO_ACKNOWLEDGE` or `DUPS_OK_ACKNOWLEDGE`. Parameters: session - the `QueueSession` the queue belongs to Parameters: queue - the queue to perform the request/reply call on exception: JMSException - if the JMS provider fails to create the`QueueRequestor` due to some internalerror. exception: InvalidDestinationException - if an invalid queue is specified.

Method Detail

close

public void close() throws JMSException(Code)

Closes the QueueRequestor and its session.

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

Note that this method closes the QueueSession object passed to the QueueRequestor constructor.
exception:
JMSException - if the JMS provider fails to close theQueueRequestor due to some internalerror.

request
public Message request(Message message) throws JMSException(Code)
	Sends a request and waits for a reply. The temporary queue is used for the `JMSReplyTo` destination, and only one reply per request is expected. Parameters: message - the message to send the reply message exception: JMSException - if the JMS provider fails to complete therequest due to some internal error.

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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