com.trivago.mail.pigeon.queue.ConnectionPool.java Source code

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Here is the source code for com.trivago.mail.pigeon.queue.ConnectionPool.java

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/**
 * 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;
    }
}