com.atomikos.jdbc.nonxa.AtomikosNonXAParticipant Maven / Gradle / Ivy
/**
* Copyright (C) 2000-2017 Atomikos
*
* LICENSE CONDITIONS
*
* See http://www.atomikos.com/Main/WhichLicenseApplies for details.
*/
package com.atomikos.jdbc.nonxa;
import java.io.Serializable;
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;
import com.atomikos.logging.Logger;
import com.atomikos.logging.LoggerFactory;
/**
*
*
*
* A participant for non-XA interactions. Instances are NOT recoverable in the
* sense that commit/rollback will fail after prepare. This is an implicit
* limitation of non-XA transactions and we want this to be made explicit in the
* transaction logs.
*
*
*
*
*/
class AtomikosNonXAParticipant implements Participant, Serializable
{
private static final Logger LOGGER = LoggerFactory.createLogger(AtomikosNonXAParticipant.class);
private static final long serialVersionUID = -771461092384746954L;
private boolean readOnly;
private String name;
public AtomikosNonXAParticipant() {
}
private transient JtaAwareNonXaConnection connection;
// not null iff not recovered
AtomikosNonXAParticipant ( JtaAwareNonXaConnection connection , String name )
{
this.connection = connection;
this.name = name;
}
/**
* @see com.atomikos.icatch.Participant#recover()
*/
boolean recover () throws SysException
{
// return true at this stage: there is a problem only when commit is
// requested
// and not for rollback requests!
return true;
}
/**
* @see Participant
*/
public void setCascadeList ( Map allParticipants )
throws SysException
{
// ignore
}
/**
* @see com.atomikos.icatch.Participant#setGlobalSiblingCount(int)
*/
public void setGlobalSiblingCount ( int count )
{
// ignore
}
/*
*
*
* @see com.atomikos.icatch.Participant#prepare()
*/
public int prepare () throws RollbackException, HeurHazardException,
HeurMixedException, SysException
{
// DON'T return readOnly: we need the terminated event to reuse the connection in the pool!
int ret = Participant.READ_ONLY + 1;
return ret;
}
/**
* @see com.atomikos.icatch.Participant#commit(boolean)
*/
public void commit ( boolean onePhase )
throws HeurRollbackException, HeurHazardException,
HeurMixedException, RollbackException, SysException
{
if ( isRecovered() ) {
if ( ! readOnly ) throw new HeurRollbackException();
// do nothing if readOnly: no commit needed, so don't raise unnecessary heuristic either
} else {
// not recovered -> connection not null -> commit
try {
connection.transactionTerminated ( true );
} catch ( Exception e ) {
LOGGER.logError ( "Error in non-XA commit", e );
//see case 30752: don't throw HAZARD because retries are probably useless
//and the connection won't be reused by the pool but destroyed instead
throw new HeurMixedException();
}
}
}
private boolean isRecovered()
{
return connection == null;
}
/**
* @see com.atomikos.icatch.Participant#rollback()
*/
public void rollback () throws HeurCommitException,
HeurMixedException, HeurHazardException, SysException
{
// if recovered: do nothing special since rolled back by default
if ( !isRecovered() ) {
try {
connection.transactionTerminated ( false );
} catch ( Exception e ) {
LOGGER.logError ( "Error in non-XA rollback", e );
//see case 30752: don't throw HAZARD because retries are probably useless
//and the connection won't be reused by the pool but destroyed instead
throw new HeurMixedException();
}
}
}
/**
* @see com.atomikos.icatch.Participant#forget()
*/
public void forget ()
{
// do nothing special, since DB doesn't know about 2PC or heuristics
}
public String getURI ()
{
return null;
}
public void setReadOnly ( boolean readOnly )
{
this.readOnly = readOnly;
}
@Override
public String toString() {
return "Non-XA resource '" + name +
"': warning: this resource does not support two-phase commit";
}
@Override
public boolean isRecoverable() {
return false;
}
@Override
public String getResourceName() {
return name;
}
}