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component informs other component

 
ankur rathi
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There is a requirement in my project that a component needs to inform another component when certain event occurs.

What options do I have in Java EE 5?

I guess I should use JMS queue, Message Driven Bean, and Java Mail API. Client will send message to JMS queue, Message Driven Bean will listen to it and will send a mail through Java Mail API when message arrives in queue.

One more way is, client will directly send mail through Java Mail API when that event occurs. It doesn�t need JMS queue and MDB.

What you suggest?

Thanks!
 
ankur rathi
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It seems like suitable requirement for Observer pattern but in my case, observer is a human.
 
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