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JavaTM 2 Platform Ent. Ed. v1.4 |
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java.lang.Objectjavax.jms.QueueRequestor
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.
TopicRequestor
Constructor Summary | |
QueueRequestor(QueueSession session,
Queue queue)
Constructor for the QueueRequestor class.
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Method Summary | |
void |
close()
Closes the QueueRequestor 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 QueueRequestor(QueueSession session, Queue queue) throws JMSException
QueueRequestor
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 QueueSession
the queue belongs toqueue
- the queue to perform the request/reply call on
JMSException
- if the JMS provider fails to create the
QueueRequestor
due to some internal
error.
InvalidDestinationException
- if an invalid queue is specified.Method Detail |
public Message request(Message message) throws JMSException
JMSReplyTo
destination, and only one reply per request
is expected.
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
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.
JMSException
- if the JMS provider fails to close the
QueueRequestor
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.