Package com.sun.jts.CosTransactions

Class XATerminatorImpl

java.lang.Object

com.sun.jts.CosTransactions.XATerminatorImpl

All Implemented Interfaces:

jakarta.resource.spi.XATerminator

public class XATerminatorImpl
extends Object
implements jakarta.resource.spi.XATerminator

This is used for transaction completion and crash recovery flows.

Version:

1.0

Author:

Ram Jeyaraman

Constructor Summary

Constructors

Constructor	Description
XATerminatorImpl()

Method Summary

Modifier and Type	Method	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.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

XATerminatorImpl

public XATerminatorImpl()

Method Detail

commit

public void commit(Xid xid,
                   boolean onePhase)
            throws XAException

Commits the global transaction specified by xid.

Specified by:

commit in interface jakarta.resource.spi.XATerminator

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

public void forget(Xid xid)
            throws XAException

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

Specified by:

forget in interface jakarta.resource.spi.XATerminator

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

public int prepare(Xid xid)
            throws XAException

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

Specified by:

prepare in interface jakarta.resource.spi.XATerminator

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.XATerminator 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

public 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.

Specified by:

recover in interface jakarta.resource.spi.XATerminator

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.XATerminator 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

public void rollback(Xid xid)
              throws XAException

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

Specified by:

rollback in interface jakarta.resource.spi.XATerminator

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.