public interface ImportBeanDefinitionRegistrar {
default void registerBeanDefinitions(AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry, BeanNameGenerator importBeanNameGenerator) {
this.registerBeanDefinitions(importingClassMetadata, registry);
}
default void registerBeanDefinitions(AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry) {
}
}
重要的是第二个参数
BeanDefinitionRegistry registry
public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry) {
String name = DependsOnDatabaseInitializationPostProcessor.class.getName();
if (!registry.containsBeanDefinition(name)) {
BeanDefinitionBuilder builder = BeanDefinitionBuilder.rootBeanDefinition(DependsOnDatabaseInitializationPostProcessor.class);
registry.registerBeanDefinition(name, builder.getBeanDefinition());
}
}