org.proton.plug.context.ProtonTransactionHandler.java Source code

Introduction

Here is the source code for org.proton.plug.context.ProtonTransactionHandler.java

Source

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.proton.plug.context;

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.proton.plug.AMQPSessionCallback;
import org.proton.plug.exceptions.ActiveMQAMQPException;
import org.proton.plug.logger.ActiveMQAMQPProtocolMessageBundle;

import static org.proton.plug.util.DeliveryUtil.decodeMessageImpl;
import static org.proton.plug.util.DeliveryUtil.readDelivery;

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

    final AMQPSessionCallback sessionSPI;

    public ProtonTransactionHandler(AMQPSessionCallback sessionSPI) {
        this.sessionSPI = sessionSPI;
    }

    @Override
    public void onMessage(Delivery delivery) throws ActiveMQAMQPException {
        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 ActiveMQAMQPProtocolMessageBundle.BUNDLE.errorRollingbackCoordinator(e.getMessage());
                    }
                } else {
                    try {
                        sessionSPI.commitCurrentTX();
                    } catch (Exception e) {
                        throw ActiveMQAMQPProtocolMessageBundle.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 close() throws ActiveMQAMQPException {
        //noop
    }
}