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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 .TopicRequestor

TopicRequestor

public class TopicRequestor (Code)

The TopicRequestor helper class simplifies making service requests.

The TopicRequestor constructor is given a non-transacted TopicSession and a destination Topic. It creates a TemporaryTopic 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.QueueRequestor

Field Summary
TopicPublisher	publisher
TopicSession	session
TopicSubscriber	subscriber
TemporaryTopic	tempTopic
Topic	topic

Constructor Summary
public	TopicRequestor(TopicSession session, Topic topic) Constructor for the `TopicRequestor` class.

Method Summary
public void	close() Closes the `TopicRequestor` and its session. Since a provider may allocate some resources on behalf of a `TopicRequestor` 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

publisher
TopicPublisher publisher(Code)

session
TopicSession session(Code)

subscriber
TopicSubscriber subscriber(Code)

tempTopic
TemporaryTopic tempTopic(Code)

topic
Topic topic(Code)

Constructor Detail

TopicRequestor
public TopicRequestor(TopicSession session, Topic topic) throws JMSException(Code)
	Constructor for the `TopicRequestor` 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 `TopicSession` the topic belongs to Parameters: topic - the topic to perform the request/reply call on exception: JMSException - if the JMS provider fails to create the`TopicRequestor` due to some internalerror. exception: InvalidDestinationException - if an invalid topic is specified.

Method Detail

close

public void close() throws JMSException(Code)

Closes the TopicRequestor and its session.

Since a provider may allocate some resources on behalf of a TopicRequestor 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 TopicSession object passed to the TopicRequestor constructor.
exception:
JMSException - if the JMS provider fails to close theTopicRequestor due to some internalerror.

request
public Message request(Message message) throws JMSException(Code)
	Sends a request and waits for a reply. The temporary topic is used for the `JMSReplyTo` destination; the first reply is returned, and any following replies are discarded. 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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