This topic is a little out of the SCBCD. But i have a question on a MDB!! How can i send a message from a client to a J2EE Server that have a MDB with a specified onMessage method?
Thanks Marco
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Hong Anderson
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MDB can have only one onMessage method. What do you mean specified?
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Roger Chung-Wee
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Every MDB type is associated with a particular Topic or Queue. When a client sends a JMS message, the server will allocate a correct MDB instance to service that request. In other words, an MDB is invisible to the client (which is why MDBs have no home or remote interfaces).
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Hong Anderson
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MDB has no client view (no home/component interface), therefore client cannot call MDB directly. Instead, client send message to JMS and JMS will deliver the message to MDB. [ January 30, 2006: Message edited by: Kengkaj Sathianpantarit ]
B.Sathish
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A JMS Topic or a queue is configured as a resource on the server under a JNDI name. A client has to do a JNDI look up to get a reference to a particular Topic or Queue and then post the message
Marco Lombardo
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OK ... One question. There is a EJB Server S1 that register a Queue with a name MX and there is a EJB Server S2 that register a Queue with the same name. If I look up with the JNDI name MX, what happen??
Hong Anderson
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Do you mean load balancing? I think this depend on scheduler, it may get the referece from Server1 or Server2 up to the algorithm.
I agree. Here's the link: http://ej-technologies/jprofiler - if it wasn't for jprofiler, we would need to
run our stuff on 16 servers instead of 3.
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