Spring MVC : Common param in all requests

Question

I have many controllers in my Spring MVC web application and there is a param mandatoryParam let's say which has to be present in all the requests to the web application.

Now I want to make that param-value available to all the methods in my web-layer and service-layer. How can I handle this scenario effectively?

Currently I am handling it in this way:

... controllerMethod(@RequestParam String mandatoryParam, ...)

and, then passing this param to service layer by calling it's method

Answer 1

@ControllerAdvice("net.myproject.mypackage")
public class MyControllerAdvice {

    @ModelAttribute
    public void myMethod(@RequestParam String mandatoryParam) {

        // Use your mandatoryParam
    }
}

myMethod() will be called for every request to any controller in the net.myproject.mypackage package. (Before Spring 4.0, you could not define a package. @ControllerAdvice applied to all controllers).

See the Spring Reference for more details on @ModelAttribute methods.