TopicRequestor (Java EE 5 SDK)

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Java EE 5 SDK

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javax.jms Class TopicRequestor

java.lang.Object
  javax.jms.TopicRequestor

public class TopicRequestor
extends Object

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.

版本:: 1.0 - 8 July 1998
作者:: Mark Hapner, Rich Burridge
另请参见:: QueueRequestor

构造器摘要
`TopicRequestor(TopicSession session, Topic topic)` Constructor for the `TopicRequestor` class.

方法摘要
`void`	`close()` Closes the `TopicRequestor` and its session.
`Message`	`request(Message message)` Sends a request and waits for a reply.

类方法继承 java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

构造器详细信息

TopicRequestor

public TopicRequestor(TopicSession session,
                      Topic topic)
               throws JMSException

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.

参数:: session - the TopicSession the topic belongs to; topic - the topic to perform the request/reply call on
抛出异常:: JMSException - if the JMS provider fails to create the TopicRequestor due to some internal error.; InvalidDestinationException - if an invalid topic is specified.

方法详细信息

request

public Message request(Message message)
                throws JMSException

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.

参数:: message - the message to send
返回:: the reply message
抛出异常:: JMSException - if the JMS provider fails to complete the request due to some internal error.

close

public void close()
           throws JMSException

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.

抛出异常:: JMSException - if the JMS provider fails to close the TopicRequestor due to some internal error.

概述