Java EE 8 Cookbook

How to do it

1. First, we do some configuration in the web.xml file:

    <security-constraint>        <web-resource-collection>            <web-resource-name>CH05-Authentication</web-resource-name>            <url-pattern>/authServlet</url-pattern>        </web-resource-collection>        <auth-constraint>            <role-name>role1</role-name>        </auth-constraint>    </security-constraint>    <security-role>        <role-name>role1</role-name>    </security-role>

2. Then we create a servlet to deal with our user access:

@DeclareRoles({"role1", "role2", "role3"})@WebServlet(name = "/UserAuthenticationServlet", urlPatterns = {"/UserAuthenticationServlet"})public class UserAuthenticationServlet extends HttpServlet {    private static final long serialVersionUID = 1L;    @Inject private javax.security.enterprise.SecurityContext ...