private void initSource() {
    try {

      // load the underlying driver
      try {
        Class.forName("org.postgresql.Driver");
      } catch (ClassNotFoundException ex) {
        System.err.println("Error loading Postgres driver: " + ex.getMessage());
        ex.printStackTrace();
        System.exit(1);
      }
      // Build the DSN: jdbc:postgresql://host:port/database
      StringBuilder buf = new StringBuilder();
      buf.append("jdbc:postgresql://").append(Configatron.get().getProperty("db.host")).append(":");
      buf.append(Configatron.get().getProperty("db.port")).append("/");
      buf.append(Configatron.get().getProperty("db.name"));
      log.info("DSN: " + buf.toString());

      Properties props = new Properties();
      props.setProperty("user", Configatron.get().getProperty("db.user"));
      props.setProperty("password", Configatron.get().getProperty("db.password"));
      props.setProperty("initialSize", "5");
      props.setProperty("maxActive", Configatron.get().getProperty("db.maxConnections"));

      connectionFactory = new DriverManagerConnectionFactory(buf.toString(), props);
      connectionPool = new GenericObjectPool(null);
      poolableConnectionFactory = new PoolableConnectionFactory(connectionFactory, connectionPool, null, null, false, true);

      dataSource = new PoolingDataSource(connectionPool);

    } catch (Exception ex) {
      // handle the error
      System.err.println("Got error initializing data source: " + ex.getMessage());
      System.exit(1);
    }
  }