org.apache.activemq.artemis.protocol.amqp.proton.ProtonTransactionHandler.java Source code

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Here is the source code for org.apache.activemq.artemis.protocol.amqp.proton.ProtonTransactionHandler.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.apache.activemq.artemis.protocol.amqp.proton;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.PooledByteBufAllocator;
import org.apache.activemq.artemis.protocol.amqp.broker.AMQPSessionCallback;
import org.apache.activemq.artemis.protocol.amqp.exceptions.ActiveMQAMQPException;
import org.apache.activemq.artemis.protocol.amqp.logger.ActiveMQAMQPProtocolMessageBundle;
import org.apache.activemq.artemis.protocol.amqp.util.DeliveryUtil;
import org.apache.qpid.proton.amqp.Binary;
import org.apache.qpid.proton.amqp.Symbol;
import org.apache.qpid.proton.amqp.messaging.Accepted;
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.jboss.logging.Logger;

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

    private static final Logger log = Logger.getLogger(ProtonTransactionHandler.class);

    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;
            }

            DeliveryUtil.readDelivery(receiver, buffer);

            receiver.advance();

            MessageImpl msg = DeliveryUtil.decodeMessageImpl(buffer);

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

            if (action instanceof Declare) {
                Binary txID = sessionSPI.newTransaction();
                Declared declared = new Declared();
                declared.setTxnId(txID);
                delivery.disposition(declared);
                delivery.settle();
            } else if (action instanceof Discharge) {
                Discharge discharge = (Discharge) action;

                Binary txID = discharge.getTxnId();
                if (discharge.getFail()) {
                    try {
                        sessionSPI.rollbackTX(txID, true);
                        delivery.disposition(new Accepted());
                    } catch (Exception e) {
                        throw ActiveMQAMQPProtocolMessageBundle.BUNDLE.errorRollingbackCoordinator(e.getMessage());
                    }
                } else {
                    try {
                        sessionSPI.commitTX(txID);
                        delivery.disposition(new Accepted());
                    } catch (ActiveMQAMQPException amqpE) {
                        throw amqpE;
                    } catch (Exception e) {
                        throw ActiveMQAMQPProtocolMessageBundle.BUNDLE.errorCommittingCoordinator(e.getMessage());
                    }
                }
            }
        } catch (ActiveMQAMQPException amqpE) {
            delivery.disposition(createRejected(amqpE.getAmqpError(), amqpE.getMessage()));
        } catch (Exception e) {
            log.warn(e.getMessage(), e);
            delivery.disposition(createRejected(Symbol.getSymbol("failed"), e.getMessage()));
        } finally {
            delivery.settle();
            buffer.release();
        }
    }

    private Rejected createRejected(Symbol amqpError, String message) {
        Rejected rejected = new Rejected();
        ErrorCondition condition = new ErrorCondition();
        condition.setCondition(amqpError);
        condition.setDescription(message);
        rejected.setError(condition);
        return rejected;
    }

    @Override
    public void onFlow(int credits, boolean drain) {
    }

    @Override
    public void close(boolean linkRemoteClose) throws ActiveMQAMQPException {
        // no op
    }

    @Override
    public void close(ErrorCondition condition) throws ActiveMQAMQPException {
        // no op
    }
}