javax.resource.spi

Interface XATerminator

public interface XATerminator

The XATerminator interface is used for transaction completion and crash recovery flows.

Version:

1.0

Author:

Ram Jeyaraman

Method Summary

Modifier and Type	Method and Description
void	commit(Xid xid, boolean onePhase) Commits the global transaction specified by xid.
void	forget(Xid xid) Tells the resource manager to forget about a heuristically completed transaction branch.
int	prepare(Xid xid) Ask the resource manager to prepare for a transaction commit of the transaction specified in xid.
Xid[]	recover(int flag) Obtains a list of prepared transaction branches from a resource manager.
void	rollback(Xid xid) Informs the resource manager to roll back work done on behalf of a transaction branch.

Method Detail

commit

void commit(Xid xid,
            boolean onePhase)
     throws XAException

Commits the global transaction specified by xid.

Parameters:

xid - A global transaction identifier

onePhase - If true, the resource manager should use a one-phase commit protocol to commit the work done on behalf of xid.

Throws:

XAException - An error has occurred. Possible XAExceptions are XA_HEURHAZ, XA_HEURCOM, XA_HEURRB, XA_HEURMIX, XAER_RMERR, XAER_RMFAIL, XAER_NOTA, XAER_INVAL, or XAER_PROTO.

If the resource manager did not commit the transaction and the parameter onePhase is set to true, the resource manager may throw one of the XA_RB* exceptions. Upon return, the resource manager has rolled back the branch's work and has released all held resources.

forget

void forget(Xid xid)
     throws XAException

Tells the resource manager to forget about a heuristically completed transaction branch.

Parameters:

xid - A global transaction identifier.

Throws:

XAException - An error has occurred. Possible exception values are XAER_RMERR, XAER_RMFAIL, XAER_NOTA, XAER_INVAL, or XAER_PROTO.

prepare

int prepare(Xid xid)
     throws XAException

Ask the resource manager to prepare for a transaction commit of the transaction specified in xid.

Parameters:

xid - A global transaction identifier.

Returns:

A value indicating the resource manager's vote on the outcome of the transaction. The possible values are: XA_RDONLY or XA_OK. These constants are defined in javax.transaction.xa.XAResource interface. If the resource manager wants to roll back the transaction, it should do so by raising an appropriate XAException in the prepare method.

Throws:

XAException - An error has occurred. Possible exception values are: XA_RB*, XAER_RMERR, XAER_RMFAIL, XAER_NOTA, XAER_INVAL, or XAER_PROTO.

recover

Xid[] recover(int flag)
       throws XAException

Obtains a list of prepared transaction branches from a resource manager. The transaction manager calls this method during recovery to obtain the list of transaction branches that are currently in prepared or heuristically completed states.

Parameters:

flag - One of TMSTARTRSCAN, TMENDRSCAN, TMNOFLAGS. TMNOFLAGS must be used when no other flags are set in the parameter. These constants are defined in javax.transaction.xa.XAResource interface.

Returns:

The resource manager returns zero or more XIDs of the transaction branches that are currently in a prepared or heuristically completed state. If an error occurs during the operation, the resource manager should throw the appropriate XAException.

Throws:

XAException - An error has occurred. Possible values are XAER_RMERR, XAER_RMFAIL, XAER_INVAL, and XAER_PROTO.

rollback

void rollback(Xid xid)
       throws XAException

Informs the resource manager to roll back work done on behalf of a transaction branch.

Parameters:

xid - A global transaction identifier.

Throws:

XAException - An error has occurred. Possible XAExceptions are XA_HEURHAZ, XA_HEURCOM, XA_HEURRB, XA_HEURMIX, XAER_RMERR, XAER_RMFAIL, XAER_NOTA, XAER_INVAL, or XAER_PROTO.

If the transaction branch is already marked rollback-only the resource manager may throw one of the XA_RB* exceptions. Upon return, the resource manager has rolled back the branch's work and has released all held resources.