com.arjuna.mw.wst11

Class UserBusinessActivity

java.lang.Object

com.arjuna.mw.wst11.UserBusinessActivity

Direct Known Subclasses:

UserBusinessActivityImple, UserBusinessActivityStandaloneImple, UserSubordinateBusinessActivityImple

public abstract class UserBusinessActivity
extends Object

This is the interface that allows BAs to be started and terminated. The messaging layer converts the messages into calls on this. Importantly, a UserBusinessActivity does not represent a specific transaction, but rather is responsible for providing access to an implicit per-thread transaction context; it is similar to the UserTransaction in the JTA specification. Therefore, all of the UserTransaction methods implicitly act on the current thread of control.

Since:

XTS 1.0.

Version:

$Id: UserBusinessActivity.java,v 1.4.6.1 2005/11/22 10:36:06 kconner Exp $

Author:

Mark Little (mark.little@arjuna.com)

Field Summary

Fields

Modifier and Type	Field and Description
static int	ATOMIC_OUTCOME
static int	MIXED_OUTCOME

Constructor Summary

Constructors

Constructor and Description
UserBusinessActivity()

Method Summary

Modifier and Type	Method and Description
abstract void	begin() Start a new business activity with atomic outcome.
abstract void	begin(int timeout) Start a new BA with atomic outcome and the specified timeout as its lifetime.
abstract void	cancel() If the BA must undo its work then the cancel method is used.
abstract void	close() The BA is normally terminated by the close method.
abstract void	complete() If participants have registered for the BusinessAgreementWithComplete protocol then they will be expecting the application to inform them when all work intended for them has been sent (and responded to).
static UserBusinessActivity	getUserBusinessActivity() Get the user business activity.
abstract UserBusinessActivity	getUserSubordinateBusinessActivity() get the user subordinate business activity this is a UserBusinessActivity whose begin method will create an interposed BA transaction
static void	setUserBusinessActivity(UserBusinessActivity userBusinessActivity) Set the user business activity.
abstract String	transactionIdentifier()

Methods inherited from class java.lang.Object

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

Field Detail

ATOMIC_OUTCOME

public static final int ATOMIC_OUTCOME

See Also:

Constant Field Values

MIXED_OUTCOME

public static final int MIXED_OUTCOME

See Also:

Constant Field Values

Constructor Detail

UserBusinessActivity

public UserBusinessActivity()

Method Detail

getUserBusinessActivity

public static UserBusinessActivity getUserBusinessActivity()

Get the user business activity.

Returns:

The user business activity.

setUserBusinessActivity

public static void setUserBusinessActivity(UserBusinessActivity userBusinessActivity)

Set the user business activity.

Parameters:

userBusinessActivity - The user business activity.

getUserSubordinateBusinessActivity

public abstract UserBusinessActivity getUserSubordinateBusinessActivity()

get the user subordinate business activity this is a UserBusinessActivity whose begin method will create an interposed BA transaction

Returns:

The user business activity.

begin

public abstract void begin()
                    throws WrongStateException,
                           SystemException

Start a new business activity with atomic outcome. If one is already associated with this thread then the WrongStateException will be thrown. Upon success, this operation associates the newly created transaction with the current thread.

Throws:

WrongStateException

SystemException

begin

public abstract void begin(int timeout)
                    throws WrongStateException,
                           SystemException

Start a new BA with atomic outcome and the specified timeout as its lifetime. If one is already associated with this thread then the WrongStateException will be thrown.

Throws:

WrongStateException

SystemException

close

public abstract void close()
                    throws TransactionRolledBackException,
                           UnknownTransactionException,
                           SystemException,
                           WrongStateException

The BA is normally terminated by the close method. This signals to all registered participants that the BA has ended and no compensation is required.

Throws:

TransactionRolledBackException

UnknownTransactionException

SystemException

WrongStateException

cancel

public abstract void cancel()
                     throws UnknownTransactionException,
                            SystemException,
                            WrongStateException

If the BA must undo its work then the cancel method is used. Any participants that can compensate are forced to do so.

Throws:

UnknownTransactionException

SystemException

WrongStateException

complete

public abstract void complete()
                       throws UnknownTransactionException,
                              SystemException,
                              WrongStateException

If participants have registered for the BusinessAgreementWithComplete protocol then they will be expecting the application to inform them when all work intended for them has been sent (and responded to). The complete method is used for this purpose.

Throws:

UnknownTransactionException

SystemException

WrongStateException

transactionIdentifier

public abstract String transactionIdentifier()