javax.servlet.http.HttpServlet not found

Hi all,

I'm trying to use the ServletWebServer, however when I try to instanciate it, i get the following error:

The type javax.servlet.http.HttpServlet cannot be resolved. It is indirectly
 referenced from required .class files

Searching the internet I only found out that "the servlet container should provide the implementation" of the servlet-api. Isn't the ServletWebServer the container I'm using? Or should I take an implementation of HttpServlet from tomcat or the like?

Thanks in advance for any answer.

david