javax.transaction
Interface Transaction

public interface Transaction

The Transaction interface allows operations to be performed against the transaction in the target Transactioin object. A Transaction object is created corresponding to each global transaction creation. The Transaction object can be used for resource enlistment, synchronization registration, transaction completion and status query operations.

Method Summary

void	commit() Complete the transaction represented by this Transaction object
boolean	delistResource(XAResource xaRes, int flag) Delist the resource specified from the current transaction associated with the calling thread.
boolean	enlistResource(XAResource xaRes) Enlist the resource specified with the current transaction context of the calling thread
int	getStatus() Obtain the status of the transaction associated with the current thread.
void	registerSynchronization(Synchronization sync) Register a synchronization object for the transaction currently associated with the calling thread.
void	rollback() Rollback the transaction represented by this Transaction object.
void	setRollbackOnly() Modify the transaction associated with the current thread such that the only possible outcome of the transaction is to roll back the transaction.

Method Detail

commit

public void commit()
            throws RollbackException,
                   HeuristicMixedException,
                   HeuristicRollbackException,
                   SecurityException,
                   IllegalStateException,
                   SystemException

Complete the transaction represented by this Transaction object

Throws:

RollbackException - Thrown to indicate that the transaction has been rolled back rather than committed.

HeuristicMixedException - Thrown to indicate that a heuristic decision was made and that some relevant updates have been committed while others have been rolled back.

HeuristicRollbackException - Thrown to indicate that a heuristic decision was made and that some relevant updates have been rolled back.

SecurityException - Thrown to indicate that the thread is not allowed to commit the transaction.

IllegalStateException - Thrown if the current thread is not associated with a transaction.

SystemException - Thrown if the transaction manager encounters an unexpected error condition

delistResource

public boolean delistResource(XAResource xaRes,
                              int flag)
                       throws IllegalStateException,
                              SystemException

Delist the resource specified from the current transaction associated with the calling thread.

Parameters:

xaRes - The XAResource object representing the resource to delist

flag - One of the values of TMSUCCESS, TMSUSPEND, or TMFAIL.

Throws:

IllegalStateException - Thrown if the transaction in the target object is inactive.

SystemException - Thrown if the transaction manager encounters an unexpected error condition

enlistResource

public boolean enlistResource(XAResource xaRes)
                       throws RollbackException,
                              IllegalStateException,
                              SystemException

Enlist the resource specified with the current transaction context of the calling thread

Parameters:

xaRes - The XAResource object representing the resource to delist

Returns:

true if the resource was enlisted successfully; otherwise false.

Throws:

RollbackException - Thrown to indicate that the transaction has been marked for rollback only.

IllegalStateException - Thrown if the transaction in the target object is in prepared state or the transaction is inactive.

SystemException - Thrown if the transaction manager encounters an unexpected error condition

getStatus

public int getStatus()
              throws SystemException

Obtain the status of the transaction associated with the current thread.

Returns:

The transaction status. If no transaction is associated with the current thread, this method returns the Status.NoTransaction value.

Throws:

SystemException - Thrown if the transaction manager encounters an unexpected error condition

registerSynchronization

public void registerSynchronization(Synchronization sync)
                             throws RollbackException,
                                    IllegalStateException,
                                    SystemException

Register a synchronization object for the transaction currently associated with the calling thread. The transction manager invokes the beforeCompletion method prior to starting the transaction commit process. After the transaction is completed, the transaction manager invokes the afterCompletion method.

Parameters:

sync - The Synchronization object for the transaction associated with the target object

Throws:

RollbackException - Thrown to indicate that the transaction has been marked for rollback only.

IllegalStateException - Thrown if the transaction in the target object is in prepared state or the transaction is inactive.

SystemException - Thrown if the transaction manager encounters an unexpected error condition

rollback

public void rollback()
              throws IllegalStateException,
                     SystemException

Rollback the transaction represented by this Transaction object.

Throws:

IllegalStateException - Thrown if the transaction in the target object is in prepared state or the transaction is inactive.

SystemException - Thrown if the transaction manager encounters an unexpected error condition

setRollbackOnly

public void setRollbackOnly()
                     throws IllegalStateException,
                            SystemException

Modify the transaction associated with the current thread such that the only possible outcome of the transaction is to roll back the transaction.

Throws:

IllegalStateException - Thrown if the current thread is not associated with any transaction.

SystemException - Thrown if the transaction manager encounters an unexpected error condition