org.hornetq.amqp.dealer.protonimpl.TransactionHandler.java Source code

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Here is the source code for org.hornetq.amqp.dealer.protonimpl.TransactionHandler.java

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/*
 * Copyright 2005-2014 Red Hat, Inc.
 * Red Hat licenses this file to you 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 org.hornetq.amqp.dealer.protonimpl;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.PooledByteBufAllocator;
import org.apache.qpid.proton.amqp.Binary;
import org.apache.qpid.proton.amqp.Symbol;
import org.apache.qpid.proton.amqp.messaging.AmqpValue;
import org.apache.qpid.proton.amqp.messaging.Rejected;
import org.apache.qpid.proton.amqp.transaction.Declare;
import org.apache.qpid.proton.amqp.transaction.Declared;
import org.apache.qpid.proton.amqp.transaction.Discharge;
import org.apache.qpid.proton.amqp.transport.ErrorCondition;
import org.apache.qpid.proton.engine.Delivery;
import org.apache.qpid.proton.engine.Receiver;
import org.apache.qpid.proton.message.impl.MessageImpl;
import org.hornetq.amqp.dealer.exceptions.HornetQAMQPException;
import org.hornetq.amqp.dealer.logger.HornetQAMQPProtocolMessageBundle;
import org.hornetq.amqp.dealer.spi.ProtonSessionSPI;

import static org.hornetq.amqp.dealer.util.DeliveryUtil.decodeMessageImpl;
import static org.hornetq.amqp.dealer.util.DeliveryUtil.readDelivery;

/**
 * handles an amqp Coordinator to deal with transaction boundaries etc
 */
public class TransactionHandler implements ProtonDeliveryHandler {

    final ProtonSessionSPI sessionSPI;

    public TransactionHandler(ProtonSessionSPI sessionSPI) {
        this.sessionSPI = sessionSPI;
    }

    @Override
    public void onMessage(Delivery delivery) throws HornetQAMQPException {
        ByteBuf buffer = PooledByteBufAllocator.DEFAULT.heapBuffer(1024);

        final Receiver receiver;
        try {
            receiver = ((Receiver) delivery.getLink());

            if (!delivery.isReadable()) {
                return;
            }

            readDelivery(receiver, buffer);

            receiver.advance();

            MessageImpl msg = decodeMessageImpl(buffer);

            Object action = ((AmqpValue) msg.getBody()).getValue();

            if (action instanceof Declare) {
                Binary txID = sessionSPI.getCurrentTXID();
                Declared declared = new Declared();
                declared.setTxnId(txID);
                delivery.disposition(declared);
                delivery.settle();
            } else if (action instanceof Discharge) {
                Discharge discharge = (Discharge) action;
                if (discharge.getFail()) {
                    try {
                        sessionSPI.rollbackCurrentTX();
                    } catch (Exception e) {
                        throw HornetQAMQPProtocolMessageBundle.BUNDLE.errorRollingbackCoordinator(e.getMessage());
                    }
                } else {
                    try {
                        sessionSPI.commitCurrentTX();
                    } catch (Exception e) {
                        throw HornetQAMQPProtocolMessageBundle.BUNDLE.errorCommittingCoordinator(e.getMessage());
                    }
                }
                delivery.settle();
            }

        } catch (Exception e) {
            e.printStackTrace();
            Rejected rejected = new Rejected();
            ErrorCondition condition = new ErrorCondition();
            condition.setCondition(Symbol.valueOf("failed"));
            condition.setDescription(e.getMessage());
            rejected.setError(condition);
            delivery.disposition(rejected);
        } finally {
            buffer.release();
        }
    }

    public void onFlow(int credits) {

    }

    @Override
    public void checkState() {
        //noop
    }

    @Override
    public void close() throws HornetQAMQPException {
        //noop
    }
}