Security in Glassfish 3.1 ( Java EE 6)

Introduction to Security in the Java EE Platform
http://download.oracle.com/docs/cd/E19798-01/821-1841/6nmq2cpig/index.html
Getting Started Securing Web Applications
http://download.oracle.com/docs/cd/E19798-01/821-1841/bncas/index.html

In EJB caller principal can be obtained from injected SessionContext using

@Resource SessionContext sessionContext;

    System.out.println("principal=" + sessionContext.getCallerPrincipal());

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>testWEB</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <security-constraint>
    <web-resource-collection>
        <web-resource-name>TestServlet</web-resource-name>
        <url-pattern>/*</url-pattern>
        <http-method>GET</http-method>
        <http-method>POST</http-method>
    </web-resource-collection>
    <auth-constraint>
        <role-name>AppRole</role-name>
    </auth-constraint>
    <user-data-constraint>
        <transport-guarantee>NONE</transport-guarantee>
    </user-data-constraint>
</security-constraint>
    <login-config>
        <auth-method>BASIC</auth-method>
        <realm-name>default</realm-name>
    </login-config>
    <security-role>
        <role-name>AppRole</role-name>
    </security-role>
</web-app>

sun-web.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sun-web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Application Server 9.0 Servlet 2.5//EN" "http://www.sun.com/software/appserver/dtds/sun-web-app_2_5-0.dtd">
<sun-web-app error-url="">
  <context-root>/testWEB</context-root>
  <security-role-mapping>
        <role-name>AppRole</role-name>
        <principal-name>dave</principal-name>
    </security-role-mapping>

    <security-role-mapping>
        <role-name>AppRole</role-name>
        <group-name>AppGroup</group-name>
    </security-role-mapping>
  <class-loader delegate="true"/>
  <jsp-config>
    <property name="keepgenerated" value="true">
      <description>Keep a copy of the generated servlet class java code.</description>
    </property>
  </jsp-config>
  
</sun-web-app>

Add user dave in group AppGroup using server console.
Group AppGroup must be mapped to security role AppRole defined in descriptors.