JMS Durable Subscriber Example

[Siddharth Bhargava]

Hi,
Please does anyone have a durable subscriber example in jms through which I can clear my concepts ?. I have understood the theory, but I would like to have a code example through which I can clear my concepts. Where does clientID figure in the code and how is it used in durable subscriber example ? Please do explain me. I am using JBoss 5.0.0-G.A. application server. Any help would be highly appreciated.

Thanks.

[Shane Lee]

check out this article on ibm developer works, it explains why you need clientId:
IBM Websphere Technical Journal

[Siddharth Bhargava]

Hi,
I read this article. I read the description of ClientID but I still didn't get where clientID is used in the code. Please help me understand wherein the code do we use clientID.

I am using JBoss-5.0.0GA as my app. server. I have set the client ID in the <mbean> tag in the file connection-factories-service.xml. Now I didn't get where do we use the client ID in durable subscription code. Please help me understand this. Thanks.

[Shane Lee]

You set the client id in your jms connection. For my example i am using websphere MQ 7.0 as my jms messaging provider and my enterprise application is deployed on WAS 6.1, so i set the client id on my mq connection factory properties. My durable subscriber MDB then looks up this connection factory as an administered object.

Hope that makes sense.

[Siddharth Bhargava]

Is clientID same as subscription name ?

[Siddharth Bhargava]

Any update on this query ???

[Shane Lee]

For a durable subscritpion you need combination of topic name, clientId and subscriber name. When you create your TopicSubscriber from your jms session you need to provide your topic and a name for the subscriber. This uniquely identifies the subscriber to the topic.

See http://java.sun.com/j2ee/sdk_1.3/techdocs/api/javax/jms/TopicSession.html#createDurableSubscriber(javax.jms.Topic,%20java.lang.String)