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JavaTM 2 Platform Ent. Ed. v1.4 |
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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 TopicRequestor class.
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Method Summary | |
void |
close()
Closes the TopicRequestor and 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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JavaTM 2 Platform Ent. Ed. v1.4 |
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Copyright 2003 Sun Microsystems, Inc. All rights reserved.