JMS Web Service Sample (News service application)

Question

Hi,
The Web service client (NewsServiceProxy) invokes send() and this calls NewsQueueEJB. Where do we define NewsQueueEJB to be used as Web service? Is it in config /etc? Does the Web Services assembly tool make than happen?
Thanks,
Mustafa

Answer 1

in config.xml.., you say that the Queue with the context jms/newsQueue is exposed as web service..,this config.xml is read by webservices assembler tool to generate the required config for OC4J. But the web service engine doesnot know who reads the message that is going to be enqueued in this queue. The work of the web service engine is to only get its payload sent to it .., generate a jms message with what was given to it .., and enqueue this message to the queue specified..,it doesnot bother about who is going to dequeue this message..,and process it..
<jms-doc-service>
<uri>NewsService</uri>
<!-- Queue to which message has to be sent when 'send()' operation is invoked-->
<connection-factory-resource-ref>jms/newsQueueConnectionFactory</connection-factory-resource-ref>
<queue-resource-ref>jms/newsQueue</queue-resource-ref>
<!-- Topic from which response can be received when 'receive()' operation is invoked -->
<reply-to-connection-factory-resource-ref>jms/newsTopicConnectionFactory</reply-to-connection-factory-resource-ref>
<reply-to-topic-resource-ref>jms/newsTopic</reply-to-topic-resource-ref>
</jms-doc-service>
Then , you configure that any message enqueued in jms/Queue must invoke NewsQueueEJB
The above is defined in ejb-jar.xml and orion-ejb-jar.xml
<message-driven>
<description>Message Driven Bean</description>
<display-name>NewsQueue</display-name>
<ejb-name>NewsQueue</ejb-name>
<ejb-class>oracle.otnsamples.jmswebservice.ejb.NewsQueueEJB</ejb-class>
<transaction-type>Container</transaction-type>
<acknowledge-mode>Auto-acknowledge</acknowledge-mode>
<message-driven-destination>
<destination-type>javax.jms.Queue</destination-type>
</message-driven-destination>
<resource-ref>
<res-ref-name>jms/newsQueue</res-ref-name>
<res-type>javax.jms.Queue</res-type>
<res-auth>Container</res-auth>
</resource-ref>
orion-ejb-jar.xml
<message-driven-deployment name="NewsQueue" max-instances="-1" min-instances="1"
destination-location="jms/newsQueue"
connection-factory-location="jms/newsQueueConnectionFactory"
>
</message-driven-deployment>
hope this helps
Elango