com.esri.geoevent.test.performance.rabbitmq.RabbitMQEventConsumer.java Source code

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Here is the source code for com.esri.geoevent.test.performance.rabbitmq.RabbitMQEventConsumer.java

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/*
 Copyright 1995-2015 Esri
    
 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.
    
 For additional information, contact:
 Environmental Systems Research Institute, Inc.
 Attn: Contracts Dept
 380 New York Street
 Redlands, California, USA 92373
    
 email: contracts@esri.com
 */
package com.esri.geoevent.test.performance.rabbitmq;

import java.io.IOException;

import com.esri.geoevent.test.performance.ConsumerBase;
import com.esri.geoevent.test.performance.ImplMessages;
import com.esri.geoevent.test.performance.TestException;
import com.esri.geoevent.test.performance.jaxb.Config;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.QueueingConsumer;

public class RabbitMQEventConsumer extends ConsumerBase {

    private Connection connection = null;
    private Channel channel = null;
    private QueueingConsumer consumer = null;
    private String uri;
    private String exchangeName;
    private String queueName;
    private String routingKey = null;

    @Override
    public void init(Config config) throws TestException {
        super.init(config);

        uri = config.getPropertyValue("uri");
        exchangeName = config.getPropertyValue("exchangeName");
        queueName = config.getPropertyValue("queueName");
        routingKey = config.getPropertyValue("routingKey");

        if (uri == null) {
            throw new TestException("RabbitMQ event consumer ERROR: 'uri' property must be specified");
        }
        if (exchangeName == null) {
            throw new TestException("RabbitMQ event consumer ERROR: 'exchangeName' property must be specified");
        }
        if (queueName == null) {
            throw new TestException("RabbitMQ event consumer ERROR: 'queueName' property must be specified");
        }

        try {
            ConnectionFactory factory = new ConnectionFactory();
            factory.setUri(uri);
            connection = factory.newConnection();
            channel = connection.createChannel();
            channel.queueDeclare(queueName, false, false, true, null);
            channel.queueBind(queueName, exchangeName, routingKey);
            // channel.basicQos(1);
            consumer = new QueueingConsumer(channel);
            channel.basicConsume(queueName, true, consumer);
        } catch (Exception error) {
            throw new TestException(
                    ImplMessages.getMessage("INIT_FAILURE", getClass().getName(), error.getMessage()), error);
        }
    }

    @Override
    public void validate() throws TestException {
        if (consumer == null) {
            throw new TestException("RabbitMQ event consumer could not be created.");
        }
    }

    @Override
    public String pullMessage() {
        String message = null;
        try {
            byte[] bytes = consumer.nextDelivery().getBody();
            message = new String(bytes);
        } catch (Exception ignored) {
        }
        return message;
    }

    @Override
    public void destroy() {
        super.destroy();

        try {
            consumer.getChannel().basicCancel(consumer.getConsumerTag());
        } catch (IOException e) {
            e.printStackTrace();
        }

        try {
            Thread.sleep(1000);
        } catch (InterruptedException ignored) {
        }

        try {
            channel.close();
        } catch (IOException e1) {
            e1.printStackTrace();
        }

        try {
            connection.close(1000);
        } catch (IOException e) {
            e.printStackTrace();
        }

        consumer = null;
        channel = null;
        connection = null;
    }
}