Spring Framework - BeanDefinitionRegistryPostProcessor Examples

package com.logicbig.example;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.BeanDefinitionRegistryPostProcessor;
import org.springframework.beans.factory.support.GenericBeanDefinition;

public class MyBeanDefinitionRegistryPostProcessor
        implements BeanDefinitionRegistryPostProcessor {

    @Override
    public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry)
            throws BeansException {

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

    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory)
            throws BeansException {
        //no op
    }
}

package com.logicbig.example;

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

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

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.AnnotationConfigApplicationContext;

public class BeanDefinitionRegistryPostProcessorExample {

    public static void main(String[] args) {
        AnnotationConfigApplicationContext context =
                new AnnotationConfigApplicationContext(MyConfig.class);

        MyBean bean = (MyBean) context.getBean("myBeanName");
        bean.doSomething();
    }
}