问题
We are having @Configuration class, but it doesn't contain any bean definition and as it is a legacy class written by someone i don't want to remove the @Configuration annotation even while there is no bean definition. Somehow i want to perform logic on shutdown hook of web application but somehow i am not able to get bean from context in the contextDestroyed() method so i want to use @PreDestroy on that @Configuration class.
Does any one specify what is the default scope of the @Configuration class. As I don't want that if the scope is non-singleton that bean would the @PreDestroy will be called again and again.
回答1:
@Configuration is meta-annotated with @Component. This is where its Scope rules are derived from. @Scope-annotated components that specify no value (and those without a Scope annotation for that matter) default to Singleton Scope as can be looked up in the respective JavaDoc.
来源：https://stackoverflow.com/questions/34016964/scope-of-configuration-class-in-spring