java - How to programmatically setup a <security-constraint> in Servlets 3.x?

Question

In my current web application I am trying to get rid of web.xml and I have not been able to properly setup the security constraint that forces all requests to the application to use HTTPS.

<security-constraint>
  <web-resource-collection>
     <web-resource-name>all</web-resource-name>
     <url-pattern>/*</url-pattern>
  </web-resource-collection>
  <user-data-constraint>
     <transport-guarantee>CONFIDENTIAL</transport-guarantee>
  </user-data-constraint>
</security-constraint>

How can I turn the above web.xml configuration snippet in servlet 3.x configuration code that does the same thing?

UPDATE

I want the constraint to apply to every servlet, filter, and static resource in application, the examples I have seen online so far show to attach a security constraint to a servlet, but I want the security constraint attached to the web app. In the xml snippet above you see that it does not reference any specific servlet

Answer 1

I believe you are looking for the @ServletSecurity annotation

@WebServlet(urlPatterns = "/*")
@ServletSecurity(value = @HttpConstraint(transportGuarantee = TransportGuarantee.CONFIDENTIAL))
public class SomeServlet extends HttpServlet { ... } 

Or with ServletRegistration in a ServletContainerInitializer (or anywhere you have access to a ServletContext)

ServletRegistration.Dynamic dynamic = context.addServlet("someServlet", SomeServlet.class);
dynamic.addMapping("/*");
HttpConstraintElement httpConstraintElement = new HttpConstraintElement(TransportGuarantee.CONFIDENTIAL);
ServletSecurityElement servletSecurityElement = new ServletSecurityElement(httpConstraintElement);
dynamic.setServletSecurity(servletSecurityElement);