source: branches/objectmq_old/src/omq/common/util/OmqConnectionFactory.java

package omq.common.util;

import java.io.IOException;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.util.Properties;

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

/**
 * 
 * @author Sergi Toda <sergi.toda@estudiants.urv.cat>
 * 
 */
public class OmqConnectionFactory {
        private static Connection connection;
        private static int connectionTimeout = 2 * 1000;

        public static void init(Properties env) throws KeyManagementException, NoSuchAlgorithmException, IOException {
                if (connection == null) {
                        connection = getNewConnection(env);
                }
        }

        public static Connection getNewWorkingConnection(Properties env) throws Exception {
                Connection connection = null;
                boolean working = false;

                while (!working) {
                        try {
                                connection = getNewConnection(env);
                                working = true;
                        } catch (Exception e) {
                                e.printStackTrace();
                                long milis = Long.parseLong(env.getProperty(ParameterQueue.RETRY_TIME_CONNECTION, "2000"));
                                Thread.sleep(milis);
                        }
                }

                return connection;
        }

        public static Connection getNewConnection(Properties env) throws IOException, KeyManagementException, NoSuchAlgorithmException {
                // Get login info of rabbitmq
                String username = env.getProperty(ParameterQueue.USER_NAME);
                String password = env.getProperty(ParameterQueue.USER_PASS);

                // Get host info of rabbimq (where it is)
                String host = env.getProperty(ParameterQueue.SERVER_HOST);
                int port = Integer.parseInt(env.getProperty(ParameterQueue.SERVER_PORT));

                boolean ssl = Boolean.parseBoolean(env.getProperty(ParameterQueue.ENABLE_SSL));

                // Start a new connection and channel
                ConnectionFactory factory = new ConnectionFactory();
                factory.setUsername(username);
                factory.setPassword(password);
                factory.setHost(host);
                factory.setPort(port);
                factory.setConnectionTimeout(connectionTimeout);
                if (ssl) {
                        factory.useSslProtocol();
                }
                return factory.newConnection();
        }

        public static Channel getNewChannel() throws IOException {
                return connection.createChannel();
        }
}