Spring Framework - BeanFactoryPostProcessor Examples

package com.logicbig.example;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.support.GenericBeanDefinition;

public class MyBeanFactoryPostProcessor implements BeanFactoryPostProcessor {

    @Override
    public void postProcessBeanFactory(
            ConfigurableListableBeanFactory beanFactory)
            throws BeansException {

        GenericBeanDefinition bd = new GenericBeanDefinition();
        bd.setBeanClass(MyBean.class);
        bd.getPropertyValues().add("strProp", "my string property");

        ((DefaultListableBeanFactory) beanFactory)
                .registerBeanDefinition("myBeanName", bd);
    }
}

package com.logicbig.example;

public class MyBean {
    private String strProp;

    public void setStrProp(String strProp) {
        this.strProp = strProp;
    }

    public void doSomething() {
        System.out.println("from MyBean:  " + strProp);
    }
}

package com.logicbig.example;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class MyConfig {
    @Bean
   public static MyBeanFactoryPostProcessor myConfigBean() {
        return new MyBeanFactoryPostProcessor();
    }
}

package com.logicbig.example;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class BeanFactoryPostProcessorExample {

    public static void main(String[] args) {
        AnnotationConfigApplicationContext context =
                new AnnotationConfigApplicationContext(MyConfig.class);
        MyBean bean = context.getBean(MyBean.class);
        bean.doSomething();
    }

}