Problems in accessing Connection Factories in JMS

Question

Hi
We are porting A J2ee application from weblogic to SAP Web AS.
Primarily in weblogic we always get a Connection Factory Instance from
the Connection Factory and then typecast it to either
QueueConnectionFactory or TopicConnectionFactory.(Pl. see the code
below)
ConnectionFactory factory = null;
QueueConnectionFactory queueFactory = null;
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,
this.initialContextFactory);
env.put(Context.PROVIDER_URL, this.providerUrl);
context = new InitialContext(env);
factory = (ConnectionFactory)context.lookup
(this.JNDINameConnectionFactory);
queueFactory = (QueueConnectionFactory)factory;
this.connection = queueFactory.createQueueConnection();
this.session = this.connection.createQueueSession
(false, Session.AUTO_ACKNOWLEDGE);
this.queue = (Queue)context.lookup(this.queueName);
But in SAP WEB As there is not such facility provided.Is it that always
we need to lookup to the jmsfactory/default/QueueConnectionFactory for
a Queue and jmsfactory/default/TopicConnectionFactory or
jmsfactory/default/QueueConnectionFactory for Topic . Is it poosibel to
get a Connection factory Instance from where on I Could further
Typecast it to TopicConnectionFactory or QueueConnectionFactory
Instance , because this the way we normally do in Weblogic or JMS.
Also this is how the java JMS API accepts . Could you please let me
know as to are there any more configuration to be Done apart from the
JMS provider and JMS Connector in the Visual Admin for Accessing the
Topmost ConnectionFactory JNDI Instance . If no ,are there any other
workarounds , as approach for changing the code for accessing the
individual Connection Factories JNDI is not feasible for us
regards
rajesh kr

Answer 1

Hi Rajesh,
Here it is a code sample, that I was thinking about
  RajeshConnectionFactory implements QueueConnectionFactory, TopicConnectionFactory, Serializable {
   //SAP queue and topic factories that will be initialized during deserialization
   private QueueConnectionFactory sapQueueFactory;
   private TopicConnectiojnFactory sapTopicFactory;
   // will be invoked after deserialization, when performing lookup of this object
   private void readObject(ObjectInputStream stream) {
       sapQueueFactory = performLookup(PATH_TO_SAP_QUEUE_FACTORY);
       sapTopicFactory = performLookup(PATH_TO_SAP_TOPIC_FACTORY);
   //from the TopicConnectionFactoriesInterface
   TopicConnection createTopicConnection()  {
       return sapTopicFactory.createTopicConnection();
   //from the TopicConnectionFactoriesInterface
   TopicConnection createTopicConnection(String user, String password)  {
       return sapTopicFactory.createTopicConnection(user,password);
   //from the QueueConnectionFactoriesInterface
   QueueConnection createQueueConnectrion() {
       return sapQueueFactory.createQueueConnection();
   QueueConnection createQueueConnectrion(String user, String password) {
       return sapQueueFactory.createQueueConnection(user, password);
Then you will bind your RajeshConnectionFactory in the naming on the place your application is looking up, and your application after performing lookup can safely typecast it to whatever you want.
I hope that will solve your problems. If it works, I will not charge you for the code copyright :).
However I think it will be better if you fix the application to make it trully J2EE compatible instead of such magics.
Best Regards
Peter