jenkins.plugins.logstash.persistence.RabbitMqDao.java Source code

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Here is the source code for jenkins.plugins.logstash.persistence.RabbitMqDao.java

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/*
 * The MIT License
 *
 * Copyright 2014 Rusty Gerard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package jenkins.plugins.logstash.persistence;

import java.io.IOException;

import org.apache.commons.lang.StringUtils;

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

/**
 * RabbitMQ Data Access Object.
 *
 * @author Rusty Gerard
 * @since 1.0.0
 */
public class RabbitMqDao extends AbstractLogstashIndexerDao {
    final ConnectionFactory pool;

    //primary constructor used by indexer factory
    public RabbitMqDao(String host, int port, String key, String username, String password) {
        this(null, host, port, key, username, password);
    }

    // Factored for unit testing
    RabbitMqDao(ConnectionFactory factory, String host, int port, String key, String username, String password) {
        super(host, port, key, username, password);

        if (StringUtils.isBlank(key)) {
            throw new IllegalArgumentException("rabbit queue name is required");
        }

        // The ConnectionFactory must be a singleton
        // We assume this is used as a singleton as well
        // Calling this method means the configuration has changed and the pool must be re-initialized
        pool = factory == null ? new ConnectionFactory() : factory;
        pool.setHost(host);
        pool.setPort(port);

        if (!StringUtils.isBlank(username) && !StringUtils.isBlank(password)) {
            pool.setPassword(password);
            pool.setUsername(username);
        }
    }

    @Override
    public void push(String data) throws IOException {
        Connection connection = null;
        Channel channel = null;
        try {
            connection = pool.newConnection();
            channel = connection.createChannel();

            // Ensure the queue exists
            try {
                channel.queueDeclarePassive(key);
            } catch (IOException e) {
                // The queue does not exist and the channel has been closed
                finalizeChannel(channel);

                // Create the queue
                channel = connection.createChannel();
                channel.queueDeclare(key, true, false, false, null);
            }

            channel.basicPublish("", key, null, data.getBytes());
        } finally {
            finalizeChannel(channel);
            finalizeConnection(connection);
        }
    }

    @Override
    public IndexerType getIndexerType() {
        return IndexerType.RABBIT_MQ;
    }

    private void finalizeConnection(Connection connection) {
        if (connection != null && connection.isOpen()) {
            try {
                connection.close();
            } catch (IOException e) {
                // This shouldn't happen but if it does there's nothing we can do
                e.printStackTrace();
            }
        }
    }

    private void finalizeChannel(Channel channel) {
        if (channel != null && channel.isOpen()) {
            try {
                channel.close();
            } catch (IOException e) {
                // This shouldn't happen but if it does there's nothing we can do
                e.printStackTrace();
            }
        }
    }
}