InitialContext initialContext =  new  InitialContext();
DataSource ds = (DataSource)initialContext.lookup("java:comp/env/MetrRef");
Connection connection = ds.getConnection();
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery("select SYSDATE from DUAL");
resultSet.next(); 
System.out.println(resultSet.getString("SYSDATE"));
statement.close();
connection.close();
......
QueueSender queueSender = queueSession.createSender(queue);
TextMessage message = queueSession.createTextMessage();
message.setText("Listen to me please");
queueSender.send(message);
.....

onMessage() {
.........
InitialContext initialContext =  new  InitialContext();
DataSource ds = (DataSource)initialContext.lookup("java:comp/env/MetrRef");
Connection connection = ds.getConnection();
Statement statement = connection.createStatement(); // вот здесь
ResultSet resultSet = statement.executeQuery("select SYSDATE from DUAL");
resultSet.next();
System.out.println(resultSet.getString("SYSDATE"));
....