java - 访问 BeanDefinitionRegistryPostProcessor 内部的 Spring ApplicationContext

Question

如何访问 BeanDefinitionRegistryPostProcessor (BDRPP) 内部的 ApplicationContext？我有以下 BDRPP。

public class MyCustomBeansFactoryPostProcessor implements BeanDefinitionRegistryPostProcessor {

  @Override
  public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) throws BeansException {
    // Need to access ApplicationContext here
    System.out.println("Got Application Context: " + applicationContext);
  }

  @Override
  public void postProcessBeanFactory(ConfigurableListableBeanFactory configurableListableBeanFactory) throws BeansException {
  }
}

尝试添加@Autowired，甚至使我的CustomBDRPP实现ApplicationContextAware，但ApplicationContext未注入(inject)/初始化。

public class MyCustomBeansFactoryPostProcessor implements BeanDefinitionRegistryPostProcessor, ApplicationContextAware {

  //@Autowired
  private ApplicationContext applicationContext;

  public void setApplicationContext(ApplicationContext context) {
    applicationContext = context;
  }

  @Override
  public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) throws BeansException {
    System.out.println("Got Application Context: " + applicationContext);
  }

  @Override
  public void postProcessBeanFactory(ConfigurableListableBeanFactory configurableListableBeanFactory) throws BeansException {
  }
}

输出:

Got Application Context: null

如何实现这一目标？

Answer 1

我有一个类似的任务，并将 BDRPP 声明为 Bean 有效:

public class MyCustomBdrpp implements BeanDefinitionRegistryPostProcessor {

  private ApplicationContext context;

  private MyCostomBdrpp(ApplicationContext context) {
    this.context = context;
  }

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

  @Override
  public void postProcessBeanFactory(ConfigurableListableBeanFactory configurableListableBeanFactory) throws BeansException {
    //bar
  }
}

然后:

@Configuration
class MyConfig {

  @Bean
  public MyCustomBdrpp myBdrpp(@Autowired ApplicationContext context) {
    return new MyCustomBdrpp(context);
  }

}

但我需要说我正在手动创建上下文:

AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
context.register(MyConfig.class);
context.refresh();