Simple EJB Remote Client Question

[yc lim]

hi all,
i have just started trying EJBs and have some problems accessing a remote MDB on Websphere using my swing client. i specify my InitialContext.PROVIDER_URL as following

Hashtable props = new Hashtable();
props.put(InitialContext.INITIAL_CONTEXT_FACTORY, "com.ibm.websphere.naming.WsnInitialContextFactory");
props.put(InitialContext.PROVIDER_URL, "iiop://localhost");
    
InitialContext context = new InitialContext(props);
QueueConnectionFactory qConnectionFactory = (QueueConnectionFactory)context.lookup("jms/MyConnectionFactory");
Queue queue = (Queue)context.lookup("jms/MyQueue");  

but i keep getting

com.ibm.websphere.naming.CannotInstantiateObjectException: Exception occurred while the JNDI NamingManager was processing a javax.naming.Reference object.  Root exception is java.lang.Exception: De-reference of JMS provider's Reference failed - check provider is on classpath

how can i know what url/port to use to access my MDB, or how can i configure one? Thanks you~

[Valentin Tanase]

Hi Yc,

One thing to notice about MDB(s): they were not designed to be accessed via remote interfaces by the end-user. This is the reason why MDB(s) don�t have home or remote interfaces, etc. A MDB acts like a JMS message listeners and allows to J2EE applications to process messages asynchronously (this being actually the reason why they were introduced in J2EE 2.0).
Looking at your code I understand that you actually try to get a reference to a topic or a queue, in order to send a JMS message, which makes a lot of sense. As for the problem you have I would suggest you to check the next link: http://www.jguru.com/forums/view.jsp?EID=1157688
I hope this will help.
Regards.

[yc lim]

thanks Valentin,
it works perfectly!

[Valentin Tanase]

You are very welcomed!