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Transactions in MDB

 
Ranch Hand
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Hi all,
Can some one answer why does an MDB be declared only with either Required or NotSupported transaction attributes and not with other attributes?
thanks,
Srinivas.
 
Greenhorn
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when using mdb, the trasaction only can started when you get a message from a queue or topic. So required = required new, a trasaction context can't pass in the jms message. So you can just select support or not support. If use transaction, if some message arrived, onMessage() executed and one new transaction begun...
 
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