About CMP transaction
posted 16 years ago
hi,my friends :
It is a puzzle how to user JTA in my CMP client. I wonder how to gain and use the ejbcontext instance to get a usertransaction ?
thanks!
It is a puzzle how to user JTA in my CMP client. I wonder how to gain and use the ejbcontext instance to get a usertransaction ?
thanks!
posted 16 years ago
You mean a client application that is talking to an EJB? You get the UserTransaction from JNDI:
Context jndiCtx = new InitialContext();
// you may need properties for the InitialContext
UserTransaction tx = (UserTransaction)
jndiCtx.lookup("java:comp/UserTransaction");
tx.begin();
// ...
tx.commit();
// or tx.rollback();
If you are trying to get the UserTransaction from within a CMP bean, you can not - Entity beans should have declarative transactions (set in deployment descriptor).
Context jndiCtx = new InitialContext();
// you may need properties for the InitialContext
UserTransaction tx = (UserTransaction)
jndiCtx.lookup("java:comp/UserTransaction");
tx.begin();
// ...
tx.commit();
// or tx.rollback();
If you are trying to get the UserTransaction from within a CMP bean, you can not - Entity beans should have declarative transactions (set in deployment descriptor).
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