org.proton.plug.context.server.ProtonServerReceiverContext.java Source code

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

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/**
 * 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.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.proton.plug.AMQPSessionCallback;
import org.proton.plug.context.AbstractConnectionContext;
import org.proton.plug.context.AbstractProtonReceiverContext;
import org.proton.plug.context.AbstractProtonSessionContext;
import org.proton.plug.exceptions.ActiveMQAMQPException;
import org.proton.plug.exceptions.ActiveMQAMQPInternalErrorException;
import org.proton.plug.logger.ActiveMQAMQPProtocolMessageBundle;

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

public class ProtonServerReceiverContext extends AbstractProtonReceiverContext {

    private final int numberOfCredits = 100;

    public ProtonServerReceiverContext(AMQPSessionCallback sessionSPI, AbstractConnectionContext connection,
            AbstractProtonSessionContext protonSession, Receiver receiver) {
        super(sessionSPI, connection, protonSession, receiver);
    }

    public void onFlow(int credits) {
    }

    @Override
    public void initialise() throws Exception {
        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 ActiveMQAMQPInternalErrorException(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 ActiveMQAMQPProtocolMessageBundle.BUNDLE.targetAddressNotSet();
                }
                try {
                    if (!sessionSPI.queueQuery(address)) {
                        throw ActiveMQAMQPProtocolMessageBundle.BUNDLE.addressDoesntExist();
                    }
                } catch (Exception e) {
                    throw ActiveMQAMQPProtocolMessageBundle.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 ActiveMQAMQPException {
        Receiver receiver;
        try {
            receiver = ((Receiver) delivery.getLink());

            if (!delivery.isReadable()) {
                System.err.println("!!!!! Readable!!!!!!!");
                return;
            }

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

                    receiver.advance();

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

}