Spring组件之BeanFactoryPostProcessor

1. ʲô `BeanFactoryPostProcessor`

BeanFactoryPostProcessor spring beanFactory ĺôƻ beanFactory һЩΪ

spring Ϊṩ BeanFactoryPostProcessor

org.springframework.beans.factory.config.BeanFactoryPostProcessor

/**
 * beanFactory ĺôԸı beanFactory һЩΪ
 */
public interface BeanFactoryPostProcessor {

    /**
     *  beanFactory ķΪ beanFactoryʵ DefaultListableBeanFactory
     */
    void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) 
            throws BeansException;

}

org.springframework.beans.factory.support.BeanDefinitionRegistryPostProcessor

/**
 * BeanDefinition עע beanDefinition 
 * ̳ BeanFactoryPostProcessor ӿڣ
 * Ҳд BeanFactoryPostProcessor#postProcessBeanFactory 
 * 
 */
public interface BeanDefinitionRegistryPostProcessor extends BeanFactoryPostProcessor {

    /**
     * 1\. ÷ BeanDefinitionRegistryPostProcessor#postProcessBeanFactory ִ
     * 2\. Ϊ registryʵ DefaultListableBeanFactoryҲʹ beanFactory Ĳ
     */
    void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) 
            throws BeansException;

}

BeanFactoryPostProcessor AbstractApplicationContext#invokeBeanFactoryPostProcessors бִУִʱִ BeanDefinitionRegistryPostProcessor#postProcessBeanDefinitionRegistryִ BeanFactoryPostProcessor#postProcessBeanFactoryķԲο spring ִ֮ BeanFactoryPostProcessor һġ

2. `BeanFactoryPostProcessor` ṩĹ

BeanFactoryPostProcessor ṩĹܡ

2.1 `BeanFactoryPostProcessor`

̽ǰ˽ BeanFactoryPostProcessor ṩ

void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) 
        throws BeansException;

÷ֻһConfigurableListableBeanFactory˽ BeanFactoryPostProcessor ΪʲôҪ֪ṩЩܣ

set

֮⣬ register

ЩǾͿԶƻ beanFactory һЩΪˡ

2.2 `BeanDefinitionRegistryPostProcessor`

Ҳ˽ BeanDefinitionRegistryPostProcessor ṩķ

void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) 
        throws BeansException;

Ĳ BeanDefinitionRegistryǸ BeanDefinition עṩ·

ԿҪΧ BeanDefinition ȽҪķо£

BeanDefinitionRegistry#containsBeanDefinitionǷָƵ BeanDefinition
BeanDefinitionRegistry#getBeanDefinitionȡָƵ BeanDefinition
BeanDefinitionRegistry#registerBeanDefinitionעһ BeanDefinition
BeanDefinitionRegistry#removeBeanDefinitionƳ BeanDefinition

3. spring ṩ `BeanFactoryPostProcessor`

spring һ BeanFactoryPostProcessor ʵ࣬Ϣ£

EventListenerMethodProcessor
- ʵ BeanFactoryPostProcessor``SmartInitializingSingleton ӿ
- BeanDefinitionRegistryPostProcessor#postProcessBeanFactory лȡ EventListenerFactory
- SmartInitializingSingleton#afterSingletonsInstantiated д @EventListener ע
ConfigurationClassPostProcessor
- AnnotationConfigUtils#registerAnnotationConfigProcessors(BeanDefinitionRegistry, Object) ע
- ʵ BeanDefinitionRegistryPostProcessor ӿ
- @Conditional ע
- @Component ע
- @PropertySource/@PropertySources ע
- @ComponentScan/@ComponentScans ע
- @Import ע
- @ImportResource ע
- @Bean ע
- @Configuration ע

EventListenerMethodProcessor @EventListener ķԲοspring Դspring ֮̽ע @EventListener.

ConfigurationClassPostProcessor ע̣Բο

4. ܽ

Ľ BeanFactoryPostProcessor ĸ˵ BeanFactoryPostProcessor ʹãԼ spring ṩ BeanFactoryPostProcessor ʵࣺEventListenerMethodProcessor ConfigurationClassPostProcessor

ԭӣhttps://my.oschina.net/funcy/blog/4597545 ߸ˮƽд֮ӭָԭףҵתϵ߻Ȩҵתע

1. ʲô BeanFactoryPostProcessor

2. BeanFactoryPostProcessor ṩĹ

2.1 BeanFactoryPostProcessor

2.2 BeanDefinitionRegistryPostProcessor