I'm trying to follow a minimal tutorial on using Guice for a web server, without needing a web.xml: http://www.remmelt.com/post/minimal-guice-servlet-without-web-xml/
Like the creator of the tutorial, I cannot manage to make the ServletModule filter command work as expected, but all of the same code, instead using the @WebFilter attribute on the Filter class results in a working web server.
How do I make the ServletModule filter work? What is the difference between ServletModule's filter method and the @WebFilter attribute that lead to this difference in expectations?
Beyond what is covered in the tutorial, I have also tried to bind the filter before the "filter" command.
@WebListener
public class GuiceServletConfig extends GuiceServletContextListener {
@Override
protected Injector getInjector() {
return Guice.createInjector(new ServletModule() {
@Override
protected void configureServlets() {
super.configureServlets();
serve("/*").with(WiredServlet.class);
filter("/*").through(GuiceWebFilter.class);
bind(MessageSender.class).to(MessageSenderImpl.class);
}
});
}
}
public class GuiceWebFilter extends GuiceFilter{
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
super.doFilter(servletRequest, servletResponse, filterChain);
}
}
@Singleton
public class WiredServlet extends HttpServlet {
@Inject
private MessageSender messageSender;
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.getOutputStream().print("Hello world!");
}
}
Using the @WebFilter("/*"), I get a simple response of "Hello World!".
Using the filter("/*"), I instead get a 404 on the same request.
