Add Bean Programmatically to Spring Web App Context

Question

Because of a plug-in architecture, I'm trying to add a bean programmatically to my webapp. I have a Spring bean created through the @Component annotation, and i am implementing the ApplicationContextAware interface.

My override function looks like this:

@Override
public void setApplicationContext(ApplicationContext applicationContext)
        throws BeansException {

    // this fails
    this.applicationContext = (GenericWebApplicationContext) applicationContext;
 }

Basically, I can't figure out how to add a bean to the applicationContext object given to setApplicationContext. Can anyone tell me how I am going about this the wrong way?

Ok, this is what i ended up with as the solution:

@Override
public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry bdr)
        throws BeansException {
    BeanDefinition definition = new RootBeanDefinition(
            <My Class>.class);

    bdr.registerBeanDefinition("<my id>", definition);
}

Answer 1

Here is a simple code:

ConfigurableListableBeanFactory beanFactory = ((ConfigurableApplicationContext) applicationContext).getBeanFactory();
beanFactory.registerSingleton(bean.getClass().getCanonicalName(), bean);