/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file 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
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY 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 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.
*/
package org.jboss.as.ejb3.remote.protocol.versionone;
import org.jboss.as.ejb3.remote.EJBRemoteTransactionsRepository;
import org.jboss.ejb.client.TransactionID;
import org.jboss.ejb.client.UserTransactionID;
import org.jboss.ejb.client.XidTransactionID;
import org.jboss.ejb.client.remoting.PackedInteger;
import org.jboss.logging.Logger;
import org.jboss.remoting3.Channel;
import org.jboss.remoting3.MessageInputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.concurrent.ExecutorService;
/**
* Handles a transaction message which complies with the EJB remote protocol specification
*
* @author Jaikiran Pai
*/
class TransactionRequestHandler extends AbstractMessageHandler {
private static final Logger logger = Logger.getLogger(TransactionRequestHandler.class);
private static final byte HEADER_TX_INVOCATION_RESPONSE = 0x14;
private final ExecutorService executorService;
private final EJBRemoteTransactionsRepository transactionsRepository;
private TransactionRequestType txRequestType;
enum TransactionRequestType {
COMMIT,
ROLLBACK,
PREPARE,
FORGET,
BEFORE_COMPLETION
}
TransactionRequestHandler(final EJBRemoteTransactionsRepository transactionsRepository, final ExecutorService executorService, final TransactionRequestType txRequestType, final String marshallingStrategy) {
super(marshallingStrategy);
this.executorService = executorService;
this.transactionsRepository = transactionsRepository;
this.txRequestType = txRequestType;
}
@Override
public void processMessage(final Channel channel, final MessageInputStream messageInputStream) throws IOException {
final DataInputStream input = new DataInputStream(messageInputStream);
// read the invocation id
final short invocationId = input.readShort();
// read the transaction id length
final int transactionIDBytesLength = PackedInteger.readPackedInteger(input);
// read the transaction id bytes
final byte[] transactionIDBytes = new byte[transactionIDBytesLength];
input.read(transactionIDBytes);
final TransactionID transactionID = TransactionID.createTransactionID(transactionIDBytes);
// if it's a commit request, the read the additional "bit" which indicates whether it's a one-phase
// commit request
boolean onePhaseCommit = false;
if (this.txRequestType == TransactionRequestType.COMMIT) {
onePhaseCommit = input.readBoolean();
}
// start processing
if (transactionID instanceof UserTransactionID) {
// handle UserTransaction
final UserTransactionManagementTask userTransactionManagementTask;
switch (this.txRequestType) {
case COMMIT:
userTransactionManagementTask = new UserTransactionCommitTask(this, this.transactionsRepository, (UserTransactionID) transactionID, channel, invocationId);
break;
case ROLLBACK:
userTransactionManagementTask = new UserTransactionRollbackTask(this, this.transactionsRepository, (UserTransactionID) transactionID, channel, invocationId);
break;
default:
throw new IllegalArgumentException("Unknown transaction request type " + this.txRequestType);
}
// submit to a seperate thread for processing the request
this.executorService.submit(userTransactionManagementTask);
} else if (transactionID instanceof XidTransactionID) {
// handle XidTransactionID
final XidTransactionID xidTransactionID = (XidTransactionID) transactionID;
final XidTransactionManagementTask xidTransactionManagementTask;
switch (this.txRequestType) {
case COMMIT:
xidTransactionManagementTask = new XidTransactionCommitTask(this, this.transactionsRepository, xidTransactionID, channel, invocationId, onePhaseCommit);
break;
case PREPARE:
xidTransactionManagementTask = new XidTransactionPrepareTask(this, this.transactionsRepository, xidTransactionID, channel, invocationId);
break;
case ROLLBACK:
xidTransactionManagementTask = new XidTransactionRollbackTask(this, this.transactionsRepository, xidTransactionID, channel, invocationId);
break;
case FORGET:
xidTransactionManagementTask = new XidTransactionForgetTask(this, this.transactionsRepository, xidTransactionID, channel, invocationId);
break;
case BEFORE_COMPLETION:
xidTransactionManagementTask = new XidTransactionBeforeCompletionTask(this, this.transactionsRepository, xidTransactionID, channel, invocationId);
break;
default:
throw new IllegalArgumentException("Unknown transaction request type " + this.txRequestType);
}
// submit to a separate thread for processing the request
this.executorService.submit(xidTransactionManagementTask);
}
}
protected void writeTxPrepareResponseMessage(final Channel channel, final short invocationId, final int xaResourceStatusCode) throws IOException {
final DataOutputStream dataOutputStream = new DataOutputStream(channel.writeMessage());
try {
// write header
dataOutputStream.writeByte(HEADER_TX_INVOCATION_RESPONSE);
// write invocation id
dataOutputStream.writeShort(invocationId);
// write a "bit" to indicate that this message contains the XAResource status for a "prepare"
// invocation
dataOutputStream.writeBoolean(true);
// write the XAResource status
PackedInteger.writePackedInteger(dataOutputStream, xaResourceStatusCode);
} finally {
dataOutputStream.close();
}
}
protected void writeTxInvocationResponseMessage(final Channel channel, final short invocationId) throws IOException {
final DataOutputStream dataOutputStream = new DataOutputStream(channel.writeMessage());
try {
// write header
dataOutputStream.writeByte(HEADER_TX_INVOCATION_RESPONSE);
// write invocation id
dataOutputStream.writeShort(invocationId);
// write a "bit" to indicate that this message doesn't contain any XAResource status (i.e. not a
// "prepare" invocation
dataOutputStream.writeBoolean(false);
} finally {
dataOutputStream.close();
}
}
}