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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) 1998, 1999, 2000, 2001,
  *
  * Arjuna Solutions Limited,
  * Newcastle upon Tyne,
  * Tyne and Wear,
  * UK.  
  *
  * $Id: ObjectStore.java 2342 2006-03-30 13:06:17Z  $
  */
 
 package com.arjuna.ats.arjuna.objectstore;
 
Transactional participants MUST use this type of ObjectStore. It allows them to be driven through 2PC.

Author(s):
Mark Little (mark@arjuna.com)
Version:
$Id: ObjectStore.java 2342 2006-03-30 13:06:17Z $
Since:
JTS 1.0.
 
 
 public interface ParticipantStore extends TxLog
 {
    
Commit the object's state in the object store.

Parameters:
u The object to work on.
tn The type of the object to work on.
Returns:
true if no errors occurred, false otherwise.
 
 
     public boolean commit_state (Uid uString tnthrows ObjectStoreException;

    
Read the object's committed state.

Parameters:
u The object to work on.
tn The type of the object to work on.
Returns:
the state of the object.
 
 
     public InputObjectState read_committed (Uid uString tnthrows ObjectStoreException;

    
Read the object's shadowed state.

Parameters:
u The object to work on.
tn The type of the object to work on.
Returns:
the state of the object.
 
 
     public InputObjectState read_uncommitted (Uid uString tnthrows ObjectStoreException;

    
Remove the object's uncommitted state.

Parameters:
u The object to work on.
tn The type of the object to work on.
Returns:
true if no errors occurred, false otherwise.
 
 
     public boolean remove_uncommitted (Uid uString tnthrows ObjectStoreException;

    
Write a copy of the object's uncommitted state.

Parameters:
u The object to work on.
tn The type of the object to work on.
buff The state to write.
Returns:
true if no errors occurred, false otherwise.
    public boolean write_uncommitted (Uid uString tnOutputObjectState buffthrows ObjectStoreException;
    public boolean fullCommitNeeded ();
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