es.devcircus.rabbitmq_examples.rabbitmq_topics.EmitLogTopic.java Source code

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Here is the source code for es.devcircus.rabbitmq_examples.rabbitmq_topics.EmitLogTopic.java

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/**
 * This file is part of rabbitmq-examples.
 *
 * rabbitmq-examples is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2, or (at your option) any later version.
 *
 * rabbitmq-examples is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; see the file COPYING. If not, see
 * <http://www.gnu.org/licenses/>.
 */
package es.devcircus.rabbitmq_examples.rabbitmq_topics;

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

/**
 * @author Adrian Novegil Toledo
 * @mail adrian.novegil@gmail.com
 * @description
 */
public class EmitLogTopic {

    private static final String EXCHANGE_NAME = "topic_logs";

    /**
     * 
     * @param argv 
     */
    public static void main(String[] argv) {
        Connection connection = null;
        Channel channel = null;
        try {
            ConnectionFactory factory = new ConnectionFactory();
            factory.setHost("localhost");

            connection = factory.newConnection();
            channel = connection.createChannel();

            channel.exchangeDeclare(EXCHANGE_NAME, "topic");

            String routingKey = getRouting(argv);
            String message = getMessage(argv);

            channel.basicPublish(EXCHANGE_NAME, routingKey, null, message.getBytes());
            System.out.println(" [x] Sent '" + routingKey + "':'" + message + "'");

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (connection != null) {
                try {
                    connection.close();
                } catch (Exception ignore) {
                }
            }
        }
    }

    /**
     * 
     * @param strings
     * @return 
     */
    private static String getRouting(String[] strings) {
        if (strings.length < 1) {
            return "anonymous.info";
        }
        return strings[0];
    }

    /**
     * 
     * @param strings
     * @return 
     */
    private static String getMessage(String[] strings) {
        if (strings.length < 2) {
            return "Hello World!";
        }
        return joinStrings(strings, " ", 1);
    }

    /**
     * 
     * @param strings
     * @param delimiter
     * @param startIndex
     * @return 
     */
    private static String joinStrings(String[] strings, String delimiter, int startIndex) {
        int length = strings.length;
        if (length == 0) {
            return "";
        }
        if (length < startIndex) {
            return "";
        }
        StringBuilder words = new StringBuilder(strings[startIndex]);
        for (int i = startIndex + 1; i < length; i++) {
            words.append(delimiter).append(strings[i]);
        }
        return words.toString();
    }
}