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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) 2002, 2003, 2004,
*
* Arjuna Technologies Limited,
* Newcastle upon Tyne,
* Tyne and Wear,
* UK.
*
* $Id: DurableTwoPhaseCommitParticipant.java,v 1.1.2.2 2004/08/09 12:34:24 nmcl Exp $
*/
package com.arjuna.mwlabs.wst.at.participants;
import com.arjuna.wst.Durable2PCParticipant;
import com.arjuna.ats.arjuna.state.InputObjectState;
import com.arjuna.ats.arjuna.state.OutputObjectState;
import com.arjuna.mw.wscf.model.twophase.participants.*;
import com.arjuna.mw.wscf.model.twophase.exceptions.*;
import com.arjuna.mw.wscf.model.twophase.vote.*;
import com.arjuna.mw.wscf.exceptions.*;
import com.arjuna.mw.wsas.exceptions.SystemException;
import com.arjuna.mw.wsas.exceptions.WrongStateException;
import com.arjuna.mw.wsas.exceptions.SystemCommunicationException;
import com.arjuna.mw.wstx.logging.wstxLogger;
import com.arjuna.mwlabs.wst.util.PersistableParticipantHelper;
/**
* @author Mark Little ([email protected])
* @version $Id: DurableTwoPhaseCommitParticipant.java,v 1.1.2.2 2004/08/09
* 12:34:24 nmcl Exp $
* @since 1.0.
*/
public class DurableTwoPhaseCommitParticipant implements Participant
{
// default ctor for crash recovery
public DurableTwoPhaseCommitParticipant() {
}
public DurableTwoPhaseCommitParticipant (Durable2PCParticipant resource, String identifier)
{
_resource = resource;
_id = identifier;
}
/**
* tell the participant to prepare
*
* @return the participant's vote or a cancel vote the aprticipant is null
*
*/
public Vote prepare () throws InvalidParticipantException,
WrongStateException, HeuristicHazardException,
HeuristicMixedException, SystemException
{
try
{
if (_resource != null)
{
com.arjuna.wst.Vote vt = _resource.prepare();
if (vt instanceof com.arjuna.wst.ReadOnly)
{
_readonly = true;
return new VoteReadOnly();
}
else
{
if (vt instanceof com.arjuna.wst.Prepared)
return new VoteConfirm();
else
{
_rolledback = true;
return new VoteCancel();
}
}
}
else
return new VoteCancel();
}
// catch (com.arjuna.mw.wst.exceptions.WrongStateException ex)
catch (com.arjuna.wst.WrongStateException ex)
{
throw new WrongStateException(ex.toString());
}
/*
* catch (com.arjuna.mw.wst.exceptions.HeuristicHazardException ex {
* throw new HeuristicHazardException(ex.toString()); } catch
* (com.arjuna.mw.wst.exceptions.HeuristicMixedException ex) { throw new
* HeuristicMixedException(ex.toString()); }
*/
// catch (com.arjuna.mw.wst.exceptions.SystemException ex)
catch (com.arjuna.wst.SystemException ex)
{
if(ex instanceof com.arjuna.wst.stub.SystemCommunicationException) {
// log an error here or else the participant may be left hanging
// waiting for a prepare
wstxLogger.i18NLogger.warn_mwlabs_wst_at_participants_DurableTwoPhaseCommitParticipant_prepare_1(_id);
throw new SystemCommunicationException(ex.toString());
} else {
throw new SystemException(ex.toString());
}
}
}
/**
* attempt to commit the participant
*
*/
public void confirm () throws InvalidParticipantException,
WrongStateException, HeuristicHazardException,
HeuristicMixedException, HeuristicCancelException, SystemException
{
if (_resource != null)
{
try
{
if (!_readonly)
{
_resource.commit();
}
}
// catch (com.arjuna.mw.wst.exceptions.WrongStateException ex)
catch (com.arjuna.wst.WrongStateException ex)
{
throw new WrongStateException(ex.toString());
}
/*
* catch (com.arjuna.mw.wst.exceptions.HeuristicHazardException ex) {
* throw new HeuristicHazardException(ex.toString()); } catch
* (com.arjuna.mw.wst.exceptions.HeuristicMixedException ex) { throw
* new HeuristicMixedException(ex.toString()); } catch
* (com.arjuna.mw.wst.exceptions.HeuristicRollbackException ex) {
* throw new HeuristicCancelException(ex.toString()); }
*/
// catch (com.arjuna.mw.wst.exceptions.SystemException ex)
catch (com.arjuna.wst.SystemException ex)
{
if(ex instanceof com.arjuna.wst.stub.SystemCommunicationException) {
// log an error here -- we will end up writing a heuristic transaction record too
wstxLogger.i18NLogger.warn_mwlabs_wst_at_participants_DurableTwoPhaseCommitParticipant_confirm_1(_id);
throw new SystemCommunicationException(ex.toString());
} else {
throw new SystemException(ex.toString());
}
}
}
else
throw new InvalidParticipantException();
}
/**
* attempt to cancel the participant
*
*/
public void cancel () throws InvalidParticipantException,
WrongStateException, HeuristicHazardException,
HeuristicMixedException, HeuristicConfirmException, SystemException
{
if (_resource != null)
{
try
{
if (!_rolledback)
_resource.rollback();
}
// catch (com.arjuna.mw.wst.exceptions.WrongStateException ex)
catch (com.arjuna.wst.WrongStateException ex)
{
throw new WrongStateException(ex.toString());
}
/*
* catch (com.arjuna.mw.wst.exceptions.HeuristicHazardException ex) {
* throw new HeuristicHazardException(ex.toString()); } catch
* (com.arjuna.mw.wst.exceptions.HeuristicMixedException ex) { throw
* new HeuristicMixedException(ex.toString()); } catch
* (com.arjuna.mw.wst.exceptions.HeuristicCommitException ex) {
* throw new HeuristicConfirmException(ex.toString()); }
*/
// catch (com.arjuna.mw.wst.exceptions.SystemException ex)
catch (com.arjuna.wst.SystemException ex)
{
if(ex instanceof com.arjuna.wst.stub.SystemCommunicationException) {
// log an error here -- if the participant is dead it will retry anyway
wstxLogger.i18NLogger.error_mwlabs_wst_at_participants_DurableTwoPhaseCommitParticipant_cancel_1(_id);
throw new SystemCommunicationException(ex.toString());
} else {
throw new SystemException(ex.toString());
}
}
}
else
throw new InvalidParticipantException();
}
// TODO mark ParticipantCancelledException explicitly?
public void confirmOnePhase () throws InvalidParticipantException,
WrongStateException, HeuristicHazardException,
HeuristicMixedException, HeuristicCancelException, SystemException
{
if (_resource != null)
{
Vote v = null;
try
{
v = prepare();
}
catch (Exception ex)
{
// either the prepare timed out or the participant was invalid or in an
// invalid state
ex.printStackTrace();
v = new VoteCancel();
}
if (v instanceof VoteReadOnly)
{
_readonly = true;
}
else if (v instanceof VoteCancel)
{
_rolledback = false;
// TODO only do this if we didn't return VoteCancel
try {
cancel();
} catch (SystemCommunicationException sce) {
// if the rollback times out as well as the prepare we
// return an exception which indicates a failed transaction
}
throw new ParticipantCancelledException();
}
else
{
if (v instanceof VoteConfirm)
{
try
{
confirm();
}
catch (HeuristicHazardException ex)
{
throw ex;
}
catch (HeuristicMixedException ex)
{
throw ex;
}
catch (HeuristicCancelException ex)
{
throw ex;
}
catch (Exception ex)
{
throw new HeuristicHazardException();
}
}
else
{
cancel(); // TODO error
throw new HeuristicHazardException();
}
}
}
else
throw new InvalidParticipantException();
}
public void forget () throws InvalidParticipantException,
WrongStateException, SystemException
{
}
public void unknown () throws SystemException
{
/*
* If the transaction is unknown, then we assume it rolled back.
*/
try
{
cancel();
}
catch (Exception ex)
{
// TODO
}
}
public String id () throws SystemException
{
return _id;
}
public boolean save_state (OutputObjectState os)
{
return PersistableParticipantHelper.save_state(os, _resource) ;
}
public boolean restore_state (InputObjectState os)
{
_resource = (Durable2PCParticipant)PersistableParticipantHelper.restore_state(os) ;
return true ;
}
private Durable2PCParticipant _resource;
private String _id;
private boolean _readonly;
private boolean _rolledback;
}
