com.atomikos.icatch.imp.SubTransactionCoordinatorParticipant Maven / Gradle / Ivy
/**
* Copyright (C) 2000-2020 Atomikos
*
* LICENSE CONDITIONS
*
* See http://www.atomikos.com/Main/WhichLicenseApplies for details.
*/
package com.atomikos.icatch.imp;
import java.util.Map;
import com.atomikos.icatch.HeurCommitException;
import com.atomikos.icatch.HeurHazardException;
import com.atomikos.icatch.HeurMixedException;
import com.atomikos.icatch.HeurRollbackException;
import com.atomikos.icatch.Participant;
import com.atomikos.icatch.RollbackException;
import com.atomikos.icatch.SysException;
/**
* A participant for registering a subtx coordinator as a subordinate in 2PC of
* the parent transaction coordinator.
*/
public class SubTransactionCoordinatorParticipant implements Participant
{
private transient Participant subordinateCoordinator;
// the participant role of the subtx coordinator
// NOT serializable -> recover by ID
private String subordinateId;
// the id to recover the participant of the subordinate
private boolean prepareCalled;
// if true: heuristics on failure of rollback
public SubTransactionCoordinatorParticipant (
CoordinatorImp subordinateCoordinator )
{
this.subordinateCoordinator = subordinateCoordinator;
this.subordinateId = subordinateCoordinator.getCoordinatorId ();
this.prepareCalled = false;
}
/**
* @see com.atomikos.icatch.Participant#getURI()
*/
public String getURI ()
{
return subordinateId;
}
public void setCascadeList ( Map allParticipants )
throws SysException
{
// delegate to subordinate, in order to propagate to remote
// work (even though the subordinate itself is local, its
// registered participants may be remote!)
subordinateCoordinator.setCascadeList ( allParticipants );
}
/**
* @see com.atomikos.icatch.Participant#setGlobalSiblingCount(int)
*/
public void setGlobalSiblingCount ( int count )
{
// delegate to subordinate, in order to propagate
// to remote work
subordinateCoordinator.setGlobalSiblingCount ( count );
}
/**
* @see com.atomikos.icatch.Participant#prepare()
*/
public int prepare () throws RollbackException, HeurHazardException,
HeurMixedException, SysException
{
prepareCalled = true;
return subordinateCoordinator.prepare ();
}
/**
* @see com.atomikos.icatch.Participant#commit(boolean)
*/
public void commit ( boolean onePhase )
throws HeurRollbackException, HeurHazardException,
HeurMixedException, RollbackException, SysException
{
if ( subordinateCoordinator != null )
subordinateCoordinator.commit ( onePhase );
else if ( prepareCalled ) {
throw new HeurHazardException ();
} else {
// prepare NOT called -> subordinate timed out
// and must have rolled back
throw new RollbackException ();
}
}
/**
* @see com.atomikos.icatch.Participant#rollback()
*/
public void rollback () throws HeurCommitException,
HeurMixedException, HeurHazardException, SysException
{
if ( subordinateCoordinator != null ) {
subordinateCoordinator.rollback ();
} else if ( prepareCalled ) {
// heuristic: coordinator not recovered?!
throw new HeurHazardException();
}
// if prepare not called then the subordinate will
// not be committed, so rollback is correct then
}
/**
* @see com.atomikos.icatch.Participant#forget()
*/
public void forget ()
{
if ( subordinateCoordinator != null ) subordinateCoordinator.forget ();
}
@Override
public String getResourceName() {
return null;
}
}