org.jboss.jbossts.txbridge.inbound.BridgeDurableParticipant Maven / Gradle / Ivy
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* Copyright 2009, Red Hat Middleware LLC, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
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*
* This software is distributed in the hope that it will be useful,
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* 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 along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*
* (C) 2007, 2009 @author JBoss Inc
*/
package org.jboss.jbossts.txbridge.inbound;
import com.arjuna.ats.jta.utils.XAHelper;
import com.arjuna.wst.*;
import com.arjuna.ats.arjuna.common.Uid;
import com.arjuna.ats.internal.jta.transaction.arjunacore.jca.SubordinationManager;
import org.jboss.jbossts.txbridge.utils.txbridgeLogger;
import javax.transaction.xa.Xid;
import javax.transaction.xa.XAException;
import javax.transaction.xa.XAResource;
import javax.resource.spi.XATerminator;
import java.io.Serializable;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
/**
* Provides method call mapping between WS-AT Durable Participant interface
* and an underlying JTA subtransaction coordinator.
*
* @author [email protected], 2007-04-30
*/
public class BridgeDurableParticipant implements Durable2PCParticipant, Serializable
{
/*
* Uniq String used to prefix ids at participant registration,
* so that the recovery module can identify relevant instances.
*/
public static final String TYPE_IDENTIFIER = "BridgeDurableParticipant_";
/*
* Uniq (well, hopefully) formatId so we can distinguish our own Xids.
*/
public static final int XARESOURCE_FORMAT_ID = 131080;
private transient volatile XATerminator xaTerminator;
private transient volatile String externalTxId;
private transient volatile boolean isAwaitingRecovery = false;
static final long serialVersionUID = -5739871936627778072L;
// Xid not guaranteed Serializable by spec, but our XidImple happens to be
private volatile Xid xid;
// Id needed for recovery of the subordinate tx. Uids are likewise Serializable.
private volatile Uid subordinateTransactionId;
/**
* Create a new WS-AT Durable Participant which wraps the subordinate XA tx terminator.
*
* @param externalTxId the WS-AT Tx identifier
* @param xid the Xid to use when driving the subordinate XA transaction.
*/
BridgeDurableParticipant(String externalTxId, Xid xid)
{
txbridgeLogger.logger.trace("BridgeDurableParticipant.(TxId="+externalTxId+", Xid="+xid+")");
this.xid = xid;
this.externalTxId = externalTxId;
xaTerminator = SubordinationManager.getXATerminator();
}
/**
* Serialization hook. Gathers and writes information needed for transaction recovery.
*
* @param out the stream to which the object state is serialized.
* @throws IOException if serialization fails.
*/
private void writeObject(ObjectOutputStream out) throws IOException
{
txbridgeLogger.logger.trace("BridgeDurableParticipant.writeObject() for Xid="+xid);
// we need to preserve the Uid of the underlying SubordinateTx, as it's required
// to get a handle on it again during recovery, Using the xid wont work,
// although we do need to serialize that too for use after recovery.
try
{
subordinateTransactionId = SubordinationManager.getTransactionImporter().getImportedTransaction(xid).get_uid();
}
catch(XAException xaException)
{
txbridgeLogger.i18NLogger.error_ibdp_nosub(xaException);
throw new IOException(xaException);
}
//out.defaultWriteObject();
out.writeObject(xid);
out.writeObject(subordinateTransactionId);
}
/**
* Deserialization hook. Unpacks transaction recovery information and uses it to
* recover the subordinate transaction.
*
* @param in the stream from which to unpack the object state.
* @throws IOException if deserialzation and recovery fail.
* @throws ClassNotFoundException if deserialzation fails.
*/
private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException
{
txbridgeLogger.logger.trace("BridgeDurableParticipant.readObject()");
//in.defaultReadObject();
xid = (Xid)in.readObject();
subordinateTransactionId = (Uid)in.readObject();
// this readObject method executes only when a log is being read at recovery time:
isAwaitingRecovery = true;
xaTerminator = SubordinationManager.getXATerminator();
try
{
SubordinationManager.getTransactionImporter().recoverTransaction(subordinateTransactionId);
}
catch(XAException xaException)
{
txbridgeLogger.i18NLogger.error_ibdp_norecovery(subordinateTransactionId, xaException);
throw new IOException(xaException);
}
}
/**
* Perform any work necessary to allow it to either commit or rollback
* the work performed by the Web service under the scope of the
* transaction. The implementation is free to do whatever it needs to in
* order to fulfill the implicit contract between it and the coordinator.
*
* @return an indication of whether it can prepare or not.
* @see com.arjuna.wst.Vote
*/
public Vote prepare() throws WrongStateException, SystemException
{
txbridgeLogger.logger.trace("BridgeDurableParticipant.prepare(Xid="+xid+")");
try
{
// XAResource.XA_OK, XAResource.XA_RDONLY or exception. if RDONLY, don't call commit
int result = xaTerminator.prepare(xid);
if(result == XAResource.XA_OK)
{
txbridgeLogger.logger.trace("prepare on Xid="+xid+" returning Prepared");
return new Prepared();
}
else
{
cleanupRefs();
txbridgeLogger.logger.trace("prepare on Xid="+xid+" returning ReadOnly");
return new ReadOnly();
}
}
catch(XAException e)
{
// TODO: this is not necessarily an error. If the subordinate tx is setRollbackOnly
// e.g. due to failure of VolatileParticipant.prepare, then it's expected the prepare will fail.
// we really need to use XATerminatorExtensions to expose a isSetRollbackOnly...
cleanupRefs();
txbridgeLogger.i18NLogger.warn_ibdp_aborted(XAHelper.xidToString(xid), e);
return new Aborted();
}
}
/**
* The participant should make permanent the work that it controls.
*
* @throws WrongStateException
* @throws SystemException
*/
public void commit() throws WrongStateException, SystemException
{
txbridgeLogger.logger.trace("BridgeDurableParticipant.commit(Xid="+xid+")");
try
{
xaTerminator.commit(xid, false);
txbridgeLogger.logger.trace("commit on Xid="+xid+" OK");
}
catch (XAException e)
{
txbridgeLogger.i18NLogger.error_ibdp_commitfailed(XAHelper.xidToString(xid), e);
}
finally
{
cleanupRefs();
}
}
/**
* The participant should undo the work that it controls. The participant
* will then return an indication of whether or not it succeeded..
*
* @throws WrongStateException
* @throws SystemException
*/
public void rollback() throws WrongStateException, SystemException
{
txbridgeLogger.logger.trace("BridgeDurableParticipant.rollback(Xid="+xid+")");
try
{
xaTerminator.rollback(xid);
txbridgeLogger.logger.trace("rollback on Xid="+xid+" OK");
}
catch (XAException e)
{
txbridgeLogger.i18NLogger.error_ibdp_rollbackfailed(XAHelper.xidToString(xid), e);
}
finally
{
cleanupRefs();
}
}
/**
* During recovery the participant can enquire as to the status of the
* transaction it was registered with. If that transaction is no longer
* available (has rolled back) then this operation will be invoked by the
* coordination service.
*/
public void unknown() throws SystemException
{
txbridgeLogger.logger.trace("BridgeDurableParticipant.unknown(Xid="+xid+"): NOT IMPLEMENTED");
}
/**
* During recovery the participant can enquire as to the status of the
* transaction it was registered with. If an error occurs (e.g., the
* transaction service is unavailable) then this operation will be invoked.
*/
public void error() throws SystemException
{
txbridgeLogger.logger.trace("BridgeDurableParticipant.error(Xid="+xid+"): NOT IMPLEMENTED");
}
public boolean isAwaitingRecovery() {
return isAwaitingRecovery;
}
public Xid getXid()
{
return xid;
}
private void cleanupRefs()
{
txbridgeLogger.logger.trace("BridgeDurableParticipant.cleanupRefs()");
org.jboss.jbossts.txbridge.inbound.InboundBridgeManager.removeMapping(externalTxId);
isAwaitingRecovery = false;
}
}
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