org.hornetq.amqp.dealer.protonimpl.server.ProtonServerReceiver.java Source code

Introduction

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

Source

/*
 * 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.server;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.PooledByteBufAllocator;
import org.apache.qpid.proton.amqp.Symbol;
import org.apache.qpid.proton.amqp.messaging.Accepted;
import org.apache.qpid.proton.amqp.messaging.Rejected;
import org.apache.qpid.proton.amqp.transport.ErrorCondition;
import org.apache.qpid.proton.engine.Delivery;
import org.apache.qpid.proton.engine.Receiver;
import org.hornetq.amqp.dealer.exceptions.HornetQAMQPException;
import org.hornetq.amqp.dealer.exceptions.HornetQAMQPInternalErrorException;
import org.hornetq.amqp.dealer.logger.HornetQAMQPProtocolMessageBundle;
import org.hornetq.amqp.dealer.protonimpl.ProtonAbstractConnectionImpl;
import org.hornetq.amqp.dealer.protonimpl.ProtonAbstractReceiver;
import org.hornetq.amqp.dealer.protonimpl.ProtonSession;
import org.hornetq.amqp.dealer.spi.ProtonSessionSPI;

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

/**
 * @author Clebert Suconic
 */

public class ProtonServerReceiver extends ProtonAbstractReceiver {

    private final int numberOfCredits;

    public ProtonServerReceiver(ProtonSessionSPI sessionSPI, ProtonAbstractConnectionImpl connection,
            ProtonSession protonSession, Receiver receiver) {
        super(sessionSPI, connection, protonSession, receiver);
        this.numberOfCredits = connection.getNumberOfCredits();
    }

    public void onFlow(int credits) {
    }

    @Override
    public void initialise() throws HornetQAMQPException {
        super.initialise();
        org.apache.qpid.proton.amqp.messaging.Target target = (org.apache.qpid.proton.amqp.messaging.Target) receiver
                .getRemoteTarget();

        if (target != null) {
            if (target.getDynamic()) {
                //if dynamic we have to create the node (queue) and set the address on the target, the node is temporary and
                // will be deleted on closing of the session
                String queue = sessionSPI.tempQueueName();

                try {
                    sessionSPI.createTemporaryQueue(queue);
                } catch (Exception e) {
                    throw new HornetQAMQPInternalErrorException(e.getMessage(), e);
                }
                target.setAddress(queue.toString());
            } else {
                //if not dynamic then we use the targets address as the address to forward the messages to, however there has to
                //be a queue bound to it so we nee to check this.
                String address = target.getAddress();
                if (address == null) {
                    throw HornetQAMQPProtocolMessageBundle.BUNDLE.targetAddressNotSet();
                }
                try {
                    if (!sessionSPI.queueQuery(address)) {
                        throw HornetQAMQPProtocolMessageBundle.BUNDLE.addressDoesntExist();
                    }
                } catch (Exception e) {
                    throw HornetQAMQPProtocolMessageBundle.BUNDLE.errorFindingTemporaryQueue(e.getMessage());
                }
            }
        }

        flow(numberOfCredits);
    }

    /*
    * called when Proton receives a message to be delivered via a Delivery.
    *
    * This may be called more than once per deliver so we have to cache the buffer until we have received it all.
    *
    * */
    public void onMessage(Delivery delivery) throws HornetQAMQPException {
        Receiver receiver;
        try {
            receiver = ((Receiver) delivery.getLink());

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

            ByteBuf buffer = PooledByteBufAllocator.DEFAULT.heapBuffer(10 * 1024);
            try {
                synchronized (connection.getTrio().getLock()) {
                    readDelivery(receiver, buffer);

                    sessionSPI.serverSend(receiver, delivery, address, delivery.getMessageFormat(), buffer);

                    receiver.advance();
                    delivery.disposition(Accepted.getInstance());
                    delivery.settle();

                    if (receiver.getRemoteCredit() < numberOfCredits / 2) {
                        flow(numberOfCredits);
                    }
                }
            } finally {
                buffer.release();
            }
        } 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);
        }
    }

}