com.UseCaseSimpleConsumer.java Source code

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Here is the source code for com.UseCaseSimpleConsumer.java

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/*
 *  Copyright (c) 2015, WSO2 Inc. (http://www.wso2.org) 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 com;

import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

/**
 * Created by eranda on 2/9/15.
 */
public class UseCaseSimpleConsumer {
    private final static String ROUTE_KEY = "queue1";
    private final static String EXCHANGE_NAME = "exchange1";

    public static void main(String[] argv) throws java.io.IOException {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

        try {
            channel.exchangeDeclarePassive(EXCHANGE_NAME);
        } catch (java.io.IOException e) {
            if (!channel.isOpen())
                channel = connection.createChannel();
            channel.exchangeDeclare(EXCHANGE_NAME, "direct");
        }
        try {
            channel.queueDeclarePassive(ROUTE_KEY);
        } catch (java.io.IOException e) {
            if (!channel.isOpen())
                channel = connection.createChannel();
            channel.queueDeclare(ROUTE_KEY, false, false, false, null);
        }

        channel.queueBind(ROUTE_KEY, EXCHANGE_NAME, ROUTE_KEY);

        String param = "IBM";
        String msg = "<m:placeOrder xmlns:m=\"http://services.samples\">\n" + "    <m:order>\n"
                + "        <m:price>" + getRandom(100, 0.9, true) + "</m:price>\n" + "        <m:quantity>"
                + (int) getRandom(10000, 1.0, true) + "</m:quantity>\n" + "        <m:symbol>" + param
                + "</m:symbol>\n" + "    </m:order>\n" + "</m:placeOrder>";

        channel.basicPublish(EXCHANGE_NAME, ROUTE_KEY,
                new AMQP.BasicProperties.Builder().contentType("text/plain").build(), msg.getBytes());
        System.out.println(" [x] Sent '" + msg + "'");
        channel.close();
        connection.close();
    }

    private static double getRandom(double base, double varience, boolean onlypositive) {
        double rand = Math.random();
        return (base + ((rand > 0.5 ? 1 : -1) * varience * base * rand))
                * (onlypositive ? 1 : (rand > 0.5 ? 1 : -1));
    }
}