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Message EJB help ???

Devesh H Rao
Ranch Hand

Joined: Feb 09, 2002
Posts: 687

Hi ppl,
I was reading about message driven beans and from what i have understood i think it is a ejb implementation for asynchronous data transfer on a broader level.
Now the basic assumption for a request to be posted to the application server and processed by the message bean is that the message server is up and running always to queue the requests from the client .
my q? now is what if the message server is also down ?
Is there any way the server once it is up can be used to query its clients for any requests or are they lost ....
am i getting the concept of a message bean/message server right or i am totally offtrack on the message server functionality any help on this will be highly appreciated.
Chris Mathews
Ranch Hand

Joined: Jul 18, 2001
Posts: 2712
This really depends on the JMS implementation. For the most part, if your JMS Provider is down then attempts to send new messages will results in errors. Some JMS Providers, for example Sonic MQ, provide a store and forward feature for the client so if the Provider is down then the message will not be lost.
Devesh H Rao
Ranch Hand

Joined: Feb 09, 2002
Posts: 687

thank u chris very much
the store and forward functionality is exactly what i was lookin for in a JMS implementation when the server is down ...
i will look up the subject matter concerning the related server .
if u can provide me with any links or subject matter it would be very much helpful of u.
once again thanx for the info..
 
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