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Valentin Crettaz's cheat sheets Exception Handling  RSS feed

 
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Hi

On the first page in the ExceptionHandling.pdf document, it is mentioned under the heading "Client View":

if(ctx.getRollbackOnly())
//impossible to commit tx
else
//do more work and commit tx

What is this ctx? Is it SessionContext/EntityContext? If the answer is yes then how the standalone/remote client (non-EJB) gets access to SessionContext/EntityContext? This can only be true this were a EJB making call on other EJB? Please clarify my doubt.

Thanks

-- Ravi
 
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A bean calling another bean may be called a client.

Any bean's way of knowing if 'setRollbakOnly()' has been called by some bean and/or method earlier is to query its own context by calling 'getRollbackOnly()'

So if Bean A calls Bean B,
1. Bean A is said to be a client of Bean B
2. Bean B might query its own context to check if any bean in the call stack has already called 'setRollbackOnly()'. If yes, Bean B might not go ahead with all the processing and waste time.

Regards,
Leena
 
ravi janap
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Hi Leena

Thanks for the detailed explanation.

Regards

-- Ravi
 
It is sorta covered in the JavaRanch Style Guide.
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