ConnectionPool.java

/**
 * Copyright (C) 2011-2012 trivago GmbH <mario.mueller@trivago.com>, <christian.krause@trivago.com>
 *
 * 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.trivago.mail.pigeon.queue;


import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.trivago.mail.pigeon.configuration.Settings;
import org.apache.commons.configuration.Configuration;
import org.apache.log4j.Logger;

import java.io.IOException;

/**
 * Represents the connection pool for the
 */
public class ConnectionPool
{
	private static final Logger log = Logger.getLogger(ConnectionPool.class);

	private static Connection connection;

	private static Settings settings = Settings.create();

	public static Connection getConnection()
	{
		if (connection == null)
		{
			ConnectionFactory factory = new ConnectionFactory();
			Configuration configuration = settings.getConfiguration();

			factory.setUsername(configuration.getString("rabbit.username"));
			factory.setPassword(configuration.getString("rabbit.password"));
			factory.setVirtualHost(configuration.getString("rabbit.vhost"));
			factory.setHost(configuration.getString("rabbit.hostname"));
			factory.setPort(configuration.getInt("rabbit.port"));

			try
			{
				connection = factory.newConnection();
			}
			catch (IOException e)
			{
				log.error(e);
				throw new RuntimeException(e);
			}
		}
		return connection;
	}
}