在 Spring Boot 应用程序中跨不同组件共享数据

Question

I have some authorization info (json data) that comes in a request header of a GET request in a spring-boot application.

I have a HandlerInterceptor which reads this header in preHandle function and stores this JSON data into an object of class AuthData . I'd like to share this data with other classes/services and components without passing it around as an object. Probably using some spring feature.

I've tried to annotate the AuthData class as @Service and in the HandlerInterceptor and other places where I want to read this data with

@Autowired
private AuthData authData;

But the classes where I want to read the authData, it is always null.

What would be the best way to do that?

Thanks!

Answer 1

Not specific to Spring. Usually this type of information is put in a thread local and accessed where required. However, the thread local needs to be set and cleared from one place, for example a filter or Valve in Tomcat which handles the request before any library. I am not well versed in Spring, the framework should have such a point when the thread local can be set and cleared.