A developer implements a CMT session bean with a method storeBoth which inserts data both a related database and an LDAP server. The relational database supports transactions while the LDAP system…

Question

Options

• AImplement the SessionSynchoronization interface in the session bean. In the afterCompleteion method,
• BDefine the transaction attribute of the method storeBoth as REQUIRED. The container manages the
• CDefine the transaction attribute of the method storeBoth as REQUIRED_NEW. Carry out the database
• DDefine the transaction attribute of the method storeBoth as REQUIRED_NEW. Carry out the LDAP

• A
  6% (3)
• B
  4% (2)
• C
  79% (37)
• D
  11% (5)

Explanation

The method should start a new transaction, so we use theREQUIRED_NEWattribute. For the LDAP operation we can only detect LDAP exceptions. We cannot check the status of the LDAP operation throughSessionContext.getRollBackOnly. * CMT -Container-Managed Transactions *RequiresNew Attribute If the client is running within a transaction and invokes the enterprise bean's method, the container takes the following steps: Suspends the client's transaction Starts a new transaction Delegates the call to the method Resumes the client's transaction after the method completes If the client is not associated with a transaction, the container starts a new transaction before running the method. You should use the RequiresNew attribute when you want to ensure that the method always runs within a new transaction. The Java EE 5 Tutorial,Container-Managed Transactions

No community discussion yet for this question.