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/*
* JBoss, Home of Professional Open Source
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags.
* See the copyright.txt in the distribution for a full listing
* of individual contributors.
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
* (C) 2005-2006,
* @author JBoss Inc.
*/
/*
* Copyright (C) 2003,
*
* Arjuna Technologies Limited,
* Newcastle upon Tyne,
* Tyne and Wear,
* UK.
*
* $Id: UserTransaction.java,v 1.8.4.1 2005/11/22 10:36:05 kconner Exp $
*/
package com.arjuna.mw.wst11;
import com.arjuna.wst.SystemException;
import com.arjuna.wst.TransactionRolledBackException;
import com.arjuna.wst.UnknownTransactionException;
import com.arjuna.wst.WrongStateException;
/**
* This is the interface that allows transactions to be started and terminated.
* The messaging layer converts the Commit, Rollback and Notify messages into
* calls on this.
* Importantly, a UserTransaction 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.
*
* @author Mark Little ([email protected])
* @version $Id: UserTransaction.java,v 1.8.4.1 2005/11/22 10:36:05 kconner Exp $
* @since XTS 1.0.
*/
public abstract class UserTransaction
{
/**
* The transaction.
*/
private static UserTransaction USER_TRANSACTION ;
/**
* Get the user transaction.
* @return the user transaction.
*/
public static synchronized UserTransaction getUserTransaction()
{
return USER_TRANSACTION ;
}
/**
* Set the user transaction.
* @param userTransaction The user transaction.
*/
public static synchronized void setUserTransaction(final UserTransaction userTransaction)
{
USER_TRANSACTION = userTransaction ;
}
/**
* get the user subordinate transaction
*
* this is a UserTransaction whose begin method will create an interposed AT transaction
*/
public abstract UserTransaction getUserSubordinateTransaction();
/**
* Start a new transaction. 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.
*/
public abstract void begin()
throws WrongStateException, SystemException;
/**
* Start a new transaction with the specified timeout as its lifetime.
* If one is already associated with this thread then the
* WrongStateException will be thrown.
*/
public abstract void begin(final int timeout)
throws WrongStateException, SystemException;
/**
* The transaction is committed by the commit method. This will execute
* the PhaseZero, 2PC and OutcomeNotification protocols prior to returning.
* If there is no transaction associated with the invoking thread then
* WrongStateException is thrown. If the coordinator is not aware of the
* current transaction UnknownTransactionException is thrown. If the transaction
* ultimately rolls back then the TransactionRolledBackException is thrown.
* If any other error occurs a SystemException is thrown. When complete, this
* operation disassociates the transaction from the current thread such that
* it becomes associated with no transaction.
*/
public abstract void commit()
throws TransactionRolledBackException, UnknownTransactionException, SecurityException, SystemException, WrongStateException;
/**
* The rollback operation will terminate the transaction and return
* normally if it succeeded, while throwing an appropriate exception if it
* didn't. If there is no transaction associated with the invoking thread
* then WrongStateException is thrown. If the coordinator is not aware of the
* current transaction UnknownTransactionException is thrown. If any other error
* occurs a SystemException is thrown. When complete, this operation disassociates
* the transaction from the current thread such that it becomes associated with no
* transaction.
*/
public abstract void rollback()
throws UnknownTransactionException, SecurityException, SystemException, WrongStateException;
public abstract String transactionIdentifier ();
}
