public static void main(String[] args)
      throws SQLException, ClassNotFoundException, JSONException {
    PostgresDb db = new PostgresDb();
    // db.setUrl("jdbc:postgresql://localhost:5432/powaaim");

    try {
      Class.forName("org.postgresql.Driver");
      c = DriverManager.getConnection(db.getUrl(), db.getUser(), db.getPass());
    } catch (ClassNotFoundException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }

    st = c.createStatement();
    rs = st.executeQuery("SELECT id, name, externalshopid from shop where name='David_3'");
    System.out.println("id" + " " + "name" + " " + "externalshopid");
    c.close();
    obj = new JSONObject();

    while (rs.next()) {
      int id = rs.getInt("id");
      String externaId = rs.getString("externalshopid");
      String name = rs.getString("name");
      // System.out.println(id+ " " + " "+ name + " " +" "+ externaId);
      System.out.println();
      obj.put("id", id);
      obj.put("name", name);
      obj.put("externalshopid", externaId);
      System.out.print(obj);
    }
  }
 public static void createConnectionPool() {
   Context context;
   try {
     context = new InitialContext();
     Class.forName("org.firebirdsql.jdbc.FBDriver");
     ds = (DataSource) context.lookup("java:comp/env/jdbc/PanelTrackDB");
     Connection c = ds.getConnection();
   } catch (NamingException e) {
     // TODO Auto-generated catch block
     errorLogger.error("An Error Occured:", e);
     e.printStackTrace();
   } catch (ClassNotFoundException e) {
     errorLogger.error("An Error Occured:", e);
     // TODO Auto-generated catch block
     e.printStackTrace();
   } catch (SQLException e) {
     errorLogger.error("An Error Occured:", e);
     // TODO Auto-generated catch block
     e.printStackTrace();
   }
 }