Analytical spring-6- source AOP

Schematic

https://www.processon.com/apps/5d1c16dde4b076f4fd3f5c40

 

 

 

package com.beanPostProcessor;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.core.PriorityOrdered;
import org.springframework.stereotype.Component;

@Component
public class Lwj_BeanPostPocessor implements BeanPostProcessor, PriorityOrdered {
    // achieve PriorityOrdered, to achieve a smaller value getOrder method returns the execution front
    @Override
    public int getOrder() {
        return 102;
    }

    // initialization section before implantation method
    @Override
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        if("wjwTest".equals(beanName)){
            System.out.println ( "previous methods Lwj_BeanPostPocessor");
        }
        return bean;
    }

    // Initialize section after implantation method
    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
        if("wjwTest".equals(beanName)){
            System.out.println ( "method after Lwj_BeanPostPocessor");
        }
        return bean;
    }
}

　　

 

 This is one way to provide the extension point spring, spring in the presence of a total of five kinds of expansion mode.

 

Then call prototype (the prototype) application singleton (Singleton) can be used in two ways

Lookup way to note that @Lookup can only comment on the method, this time to comment on an abstract method.

Implement ApplicationContextAware interface set method, this method is to recreate a beanFactory then get a bean from the factory again and this time the newBean original factory in oldBean the same type but not in the same heap in LVM