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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;
 
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(s):
Mark Little (mark.little@arjuna.com)
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.

Returns:
the user transaction.
 
     public static synchronized UserTransaction getUserTransaction()
     {
         return  ;
     }

    
Set the user transaction.

Parameters:
userTransaction The user transaction.
 
     public static synchronized void setUserTransaction(final UserTransaction userTransaction)
     {
          = 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 WrongStateExceptionSystemException;

    
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 WrongStateExceptionSystemException;

    
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()
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()
    public abstract String transactionIdentifier ();
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