How can I implement behavior like Spring DispatcherServlet?

I want create logic like Spring DispatcherServlet.

I have one method recevie Wrapper request.

public void recevieWrapper(Wrapper wrapper){}

And after that I need redirect internal requests from wrapper to hadlers methods

public void firstInternalrequest(FirstInternalRequest firstInternalRequest){
}

public void secondInternalrequest(SecondInternalRequest secondInternalRequest){
}

public void lastInternalrequest(LastInternalRequest lastInternalRequest){
}

What is the name of this approach? What should I read? I can not even google the correct question. I think it's some kind of design pattern?