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java.lang.Objectjavax.jms.TopicRequestor
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.
QueueRequestor| Constructor Summary | |
| TopicRequestor(TopicSession session,
               Topic topic)Constructor for the TopicRequestorclass. | |
| Method Summary | |
|  void | close()Closes the TopicRequestorand its session. | 
|  Message | request(Message message)Sends a request and waits for a reply. | 
| Methods inherited from class java.lang.Object | 
| clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait | 
| Constructor Detail | 
public TopicRequestor(TopicSession session,
                      Topic topic)
               throws JMSException
TopicRequestor class.
 
 This implementation assumes the session parameter to be non-transacted,
 with a delivery mode of either AUTO_ACKNOWLEDGE or 
 DUPS_OK_ACKNOWLEDGE.
session - the TopicSession the topic belongs totopic - the topic to perform the request/reply call on
JMSException - if the JMS provider fails to create the
                         TopicRequestor due to some internal
                         error.
InvalidDestinationException - if an invalid topic is specified.| Method Detail | 
public Message request(Message message)
                throws JMSException
JMSReplyTo destination; the first reply is returned, 
 and any following replies are discarded.
message - the message to send
JMSException - if the JMS provider fails to complete the
                         request due to some internal error.
public void close()
           throws JMSException
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.
JMSException - if the JMS provider fails to close the
                         TopicRequestor due to some internal
                         error.| 
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Copyright 2003 Sun Microsystems, Inc. All rights reserved.