@Override
public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry)
        throws BeansException {
 
    RootBeanDefinition beanDefinition = 
                new RootBeanDefinition(MyServiceImpl.class); //The service implementation
    serviceDefinition.setTargetType(MyService.class); //The service interface
    serviceDefinition.setRole(BeanDefinition.ROLE_APPLICATION);
    registry.registerBeanDefinition("myBeanName", beanDefinition );
}
// 혹은 다음과 같은 스타일
@Override
public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) throws BeansException {
    for (String customerKey : customerKeys) { 
        String dataSourceName = "dataSource_" + customerKey;
        BeanDefinitionBuilder definitionBuilder = 
                BeanDefinitionBuilder.genericBeanDefinition(JndiObjectFactoryBean.class); 
        definitionBuilder.addPropertyValue("jndiName", "jdbc/" + dataSourceName); 
        registry.registerBeanDefinition(dataSourceName, definitionBuilder.getBeanDefinition()); 
    }
}