Class CheckPoint

java.lang.Object

org.jpos.transaction.participant.CheckPoint

All Implemented Interfaces:

Configurable, TransactionConstants, TransactionParticipant

public class CheckPoint
extends Object
implements TransactionParticipant, Configurable

Transaction participant that records a single configurable Context.checkPoint(String) marker during prepare.

Field Summary

Fields inherited from interface TransactionConstants

ABORTED, FAIL, NO_JOIN, PAUSE, PREPARED, READONLY, RETRY

Modifier and Type	Field	Description
static final int	ABORTED	Transaction has been aborted.
static final int	FAIL	Shortcut for a read-only, non-joining abort (READONLY | NO_JOIN).
static final int	NO_JOIN	This participant does not join the transaction
static final int	PAUSE	Transaction is paused.
static final int	PREPARED	Transaction has been prepared successfully.
static final int	READONLY	Context has not been modified (no need to persist a snapshot)
static final int	RETRY	Transaction should be retried.

Constructor Summary

Constructors

Constructor	Description
CheckPoint()	Default constructor; no instance state to initialise.

Method Summary

Modifier and Type	Method	Description
void	abort(long id, Serializable o)	Called by TransactionManager upon transaction commit.
void	commit(long id, Serializable o)	Called by TransactionManager upon transaction commit.
int	prepare(long id, Serializable o)	Called by TransactionManager in preparation for a transaction
void	setConfiguration(Configuration cfg)	Configures this object with the supplied Configuration.

Methods inherited from class Object

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

Constructor Details

CheckPoint

public CheckPoint()

Default constructor; no instance state to initialise.

Method Details

prepare

public int prepare(long id,
 Serializable o)

Description copied from interface: TransactionParticipant

Called by TransactionManager in preparation for a transaction

Specified by:

prepare in interface TransactionParticipant

Parameters:

id - the Transaction identifier

o - transaction context

Returns:

PREPARED or ABORTED (| NO_JOIN | READONLY)

commit

public void commit(long id,
 Serializable o)

Description copied from interface: TransactionParticipant

Called by TransactionManager upon transaction commit. Warning: implementation should be able to handle multiple calls with the same transaction id (rare crash recovery)

Specified by:

commit in interface TransactionParticipant

Parameters:

id - the Transaction identifier

o - transaction context

abort

public void abort(long id,
 Serializable o)

Description copied from interface: TransactionParticipant

Called by TransactionManager upon transaction commit. Warning: implementation should be able to handle multiple calls with the same transaction id (rare crash recovery)

Specified by:

abort in interface TransactionParticipant

Parameters:

id - the Transaction identifier

o - transaction context

setConfiguration

public void setConfiguration(Configuration cfg)

Description copied from interface: Configurable

Configures this object with the supplied Configuration.

Specified by:

setConfiguration in interface Configurable

Parameters:

cfg - Configuration object