ch.icclab.cyclops.consume.AbstractConsumer.java Source code

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Here is the source code for ch.icclab.cyclops.consume.AbstractConsumer.java

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/*
 * Copyright (c) 2016. Zuercher Hochschule fuer Angewandte Wissenschaften
 *  All Rights Reserved.
 *
 *     Licensed 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 ch.icclab.cyclops.consume;

import com.rabbitmq.client.*;

import java.io.IOException;

/**
 * Author: Martin Skoviera
 * Created on: 25/01/16
 * Description: Abstract consumer for our RabbitMQ
 */
public abstract class AbstractConsumer {
    protected abstract void consume(String message);

    /**
     * This is the body of message processing
     * @param channel where consumer should listen
     * @return consumer object
     */
    public Consumer handleDelivery(Channel channel) {
        return new DefaultConsumer(channel) {
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties,
                    byte[] body) throws IOException {

                // make sure encoding is correct
                String message = new String(body, "UTF-8");

                // and let the message be consumed by client
                consume(message);
            }
        };
    }
}