What's the point of Spring MVC's DelegatingFilterProxy?

Question

I see this in my Spring MVC app\'s web.xml:

    springSecurityFilterCh         


        

Answer 1

The thing is, servlet filters are managed by the servlet container, and not by spring. And you may need to inject some spring components into your filters.

So, if you need something like:

public class FooFilter {

    @Inject
    private FooService service;

    public void doFilter(....) { .. }

}

then you need the delegating filter proxy.