@Transactional is not working

[Rb Bora]

I am new to Spring and learning the transaction concepts. Unable to get the @Transactional to work.   Need help on the next steps for solving the issue.

Use Case:  
Data insert of Employee and Employee details should rollback when getEmployee() throws RunTimeException. But the rollback is not happening.
I am using Oracle database 11g and spring 4.3.1.RELEASE.

Code
========

public static void main( String[] args )
{
        AbstractApplicationContext ctx = new ClassPathXmlApplicationContext("spring-bean.xml");
        ctx.registerShutdownHook();
        
        Employee emp = new Employee("149518", "Mickey", "Mouse", "15 years", "tennis");
        
        IEmployee empIntfc = (IEmployee)ctx.getBean("empService");
        try {
        	empIntfc.createEmployee(emp);
        	empIntfc.createEmployeeDetails(emp);
            
        	//Below will throw RunTime Exception
        	empIntfc.getEmployee(2);
        
        }catch (Exception e ) {
        	e.printStackTrace();
        
        } finally {
        	ctx.close();	
        }
}

EmployeeService.java
====================

public class EmployeeService implements IEmployee {

	private DataSource dataSource;
	private JdbcTemplate jdbcTemplate;
	
	public void setDataSource(DataSource dataSource) {
		this.dataSource = dataSource;
		jdbcTemplate = new JdbcTemplate(this.dataSource);
	}
	public JdbcTemplate getJdbcTemplate() {
		return jdbcTemplate;
	}
	
	@Override
	@Transactional
	public int createEmployee(Employee emp) {		

		String sql1 = "INSERT INTO TEST_T1(EMP_ID, EMP_FNAME, EMP_LNAME) values (?,?,?)";
		return getJdbcTemplate().update(sql1, emp.getEmpId(), emp.getEmpFirstName(), emp.getEmpLastName());
	}

	@Override
	@Transactional
	public int createEmployeeDetails(Employee emp) {
		
		String sql = "INSERT INTO TEST_T2(EMP_ID, EXP, SKILLS) values (?,?,?)";		
		return getJdbcTemplate().update(sql, emp.getEmpId(), emp.getExp(), emp.getSkills());
	}

	@Override
	@Transactional(readOnly = true, noRollbackFor=RuntimeException.class)
	public Employee getEmployee(int empId) {
		throw new RuntimeException("Intentional runtime exception");
	}
}

IEmployee.java
=================

public interface IEmployee {
	
	public int createEmployee(Employee emp);
	public int createEmployeeDetails(Employee emp);
	public Employee getEmployee(int empId);
}

spring-bean.xml
========================

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">


  <context:annotation-config/>
  <tx:annotation-driven transaction-manager="transactionManager"/>
  
  <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
       <property name="dataSource" ref="dataSource"/>
  </bean>
  <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"  >
      <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"/>
      <property name="url" value="jdbc:oracle:thin:@//xxxx:1521/xxxx"/>
      <property name="username" value="user"/>
      <property name="password" value="user"/>
   </bean> 
   <bean id="empService" class="com.service.EmployeeService">
      <property name="dataSource" ref="dataSource"/>
   </bean>   
</beans>