/*
* Copyright (c) 2008-2013, Hazelcast, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.jca;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.transaction.TransactionContext;
import javax.transaction.xa.XAException;
import javax.transaction.xa.XAResource;
import javax.transaction.xa.Xid;
import java.util.logging.Level;
/**
* XA Resource implementation for Hazelcast.
*
* @author asimarslan
*/
public class XAResourceWrapper implements XAResource {
private final ManagedConnectionImpl managedConnection;
private int transactionTimeoutSeconds;
private XAResource inner;
private volatile boolean isStarted;
public XAResourceWrapper(ManagedConnectionImpl managedConnectionImpl) {
this.managedConnection = managedConnectionImpl;
}
//XAResource --START
@Override
public void start(Xid xid, int flags) throws XAException {
managedConnection.log(Level.FINEST, "XA start: " + xid);
switch (flags) {
case TMNOFLAGS:
setInner();
break;
case TMRESUME:
case TMJOIN:
break;
default:
throw new XAException(XAException.XAER_INVAL);
}
if (inner != null) {
isStarted = true;
inner.start(xid, flags);
}
}
@Override
public void end(Xid xid, int flags) throws XAException {
managedConnection.log(Level.FINEST, "XA end: " + xid + ", " + flags);
validateInner();
if (flags != TMSUSPEND) {
isStarted = false;
}
inner.end(xid, flags);
}
@Override
public int prepare(Xid xid) throws XAException {
managedConnection.log(Level.FINEST, "XA prepare: " + xid);
validateInner();
return inner.prepare(xid);
}
@Override
public void commit(Xid xid, boolean onePhase) throws XAException {
managedConnection.log(Level.FINEST, "XA commit: " + xid);
validateInner();
inner.commit(xid, onePhase);
}
@Override
public void rollback(Xid xid) throws XAException {
managedConnection.log(Level.FINEST, "XA rollback: " + xid);
validateInner();
inner.rollback(xid);
}
@Override
public void forget(Xid xid) throws XAException {
throw new XAException(XAException.XAER_PROTO);
}
@Override
public boolean isSameRM(XAResource xaResource) throws XAException {
if (xaResource instanceof XAResourceWrapper) {
final ManagedConnectionImpl otherManagedConnection = ((XAResourceWrapper) xaResource).managedConnection;
final HazelcastInstance hazelcastInstance = managedConnection.getHazelcastInstance();
final HazelcastInstance otherHazelcastInstance = otherManagedConnection.getHazelcastInstance();
return hazelcastInstance != null && hazelcastInstance.equals(otherHazelcastInstance);
}
return false;
}
@Override
public Xid[] recover(int flag) throws XAException {
if (inner == null) {
setInner();
}
return inner.recover(flag);
}
@Override
public int getTransactionTimeout() throws XAException {
return transactionTimeoutSeconds;
}
@Override
public boolean setTransactionTimeout(int seconds) throws XAException {
if (!isStarted) {
this.transactionTimeoutSeconds = seconds;
return true;
}
return false;
}
private void validateInner() throws XAException {
if (inner == null) {
throw new XAException(XAException.XAER_NOTA);
}
}
private void setInner() throws XAException {
final TransactionContext transactionContext = HazelcastTransactionImpl
.createTransaction(this.getTransactionTimeout(), managedConnection.getHazelcastInstance());
this.managedConnection.getTx().setTxContext(transactionContext);
inner = transactionContext.getXaResource();
}
}