Package org.wildfly.transaction.client

Interface XAOutflowHandle

public interface XAOutflowHandle

A handle for the outflow of an XA transactional resource.

In certain circumstances, if all outflowing transactions forget the enlistment or it is owned by another node, the transaction may be resolved at prepare directly with an XA_RDONLY status, or it may be completely removed from the transaction before it completes, allowing more efficient transaction resolution as well as correct behavior in the presence of outflow cycles.

Author:

David M. Lloyd

Method Summary

Modifier and Type	Method	Description
static XAOutflowHandle	createSimple(Xid xid, int timeout)	Create a simple, no-operation outflow handle.
void	forgetEnlistment()	Signal that this enlistment may be forgotten.
int	getRemainingTime()	Get an estimated remaining timeout for this transaction.
Xid	getXid()	Get the XID of the transaction.
void	nonMasterEnlistment()	Signal that the peer already had the transaction in question.
void	verifyEnlistment()	Signal that this enlistment should be activated effective immediately.

Method Detail

getRemainingTime

int getRemainingTime()

Get an estimated remaining timeout for this transaction.

Returns:

the timeout, in seconds (0 indicates that the timeout has likely already expired)

forgetEnlistment

void forgetEnlistment()

Signal that this enlistment may be forgotten.

nonMasterEnlistment

void nonMasterEnlistment()

Signal that the peer already had the transaction in question. It may have been created previously by this node, or by another node. When there are no outstanding handles, if the corresponding subordinate enlistment has not been verified, and this method was called at least once, then the enlistment may be assumed to be owned by someone else and subsequent outstanding handles will not prevent the transaction from completing.

verifyEnlistment

void verifyEnlistment()
               throws RollbackException,
                      SystemException

Signal that this enlistment should be activated effective immediately. If any outflowing transactions verify the enlistment, then the enlistment is verified for all.

Throws:

RollbackException - if the transaction was rolled back before the enlistment could be activated

SystemException - if the enlistment failed for an unexpected reason

getXid

@NotNull
Xid getXid()

Get the XID of the transaction.

Returns:

the XID of the transaction (must not be null)

createSimple

static XAOutflowHandle createSimple(Xid xid,
                                    int timeout)

Create a simple, no-operation outflow handle.

Parameters:

xid - the transaction ID (must not be null)

timeout - the estimated remaining time, in seconds

Returns:

the outflow handle (not null)