Can't get MEJB with J2EE1.4 Ref Impl

Question

Hello,
I'm trying to obtain the Management EJB with the J2EE 1.4 Reference Implementation but I am receiving a ClassCastException. Is this not implemented to JSR 77 spec yet? Here is my code snippet:
String MEJB = "ejb/mgmt/MEJB";
ManagementHome managementHome = null;
Context context = new InitialContext();
Object obj = context.lookup(MEJB);
// this next line causes the Exception -- I investigated and the 'obj' is a sun CORBA object WHY?
managementHome = (ManagementHome)PortableRemoteObject.narrow(obj,ManagementHome.class);
Thanks
Mark Lepak

Answer 1

OK here is the info for accessing MEJB using a jsp thru j2ee web module.
01. create index.jsp
<%@ page import='javax.naming.*' %>
<%@ page import='javax.rmi.PortableRemoteObject' %>
<%@ page import='javax.management.j2ee.ManagementHome' %>
<%@ page import='javax.management.j2ee.Management' %>
<%@ page import='javax.management.*' %>
<%= "start mejbJsp <br>" %>
<%
Management mejb = null;
try {
InitialContext ic = new InitialContext();
out.println("in mejbJSP: obtained ic ...<br>");
Object objRef = ic.lookup("ejb/mgmt/MEJB");
out.println("in mejbJSP: objRef = " + objRef + " <br>");
ManagementHome home =
(ManagementHome)PortableRemoteObject.narrow(objRef,
ManagementHome.class);
out.println("in mejbJSP: home = " + home + " <br>");
mejb = home.create();
out.println("in mejbJSP: MEJB default domain = " +
mejb.getDefaultDomain() + " <br>");
} catch (Exception ex) {
out.println(ex.getMessage());
%>
<%= "end mejbJsp <br>" %>
02. Since MEJB is secured we need to provide the corresponding security info in the descriptors . Following are the sample descriptor entries which include security and basic authentication.
02.01. web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<description>no description</description>
<display-name>mejbJsp</display-name>
<servlet>
<description>mejb jsp example</description>
<display-name>mejbJsp</display-name>
<servlet-name>mejbJsp</servlet-name>
<jsp-file>/index.jsp</jsp-file>
</servlet>
<ejb-ref>
<ejb-ref-name>ejbs/mejb</ejb-ref-name>
<ejb-ref-type>Session</ejb-ref-type>
<home>javax.management.j2ee.ManagementHome</home>
<remote>javax.management.j2ee.Management</remote>
<ejb-link>MEjbBean</ejb-link>
</ejb-ref>
<security-constraint>
<web-resource-collection>
<web-resource-name>Basic Realm</web-resource-name>
<url-pattern>/*</url-pattern>
</web-resource-collection>
<auth-constraint>
<role-name>admin-role</role-name>
</auth-constraint>
</security-constraint>
<login-config>
<auth-method>BASIC</auth-method>
<realm-name>Basic Realm</realm-name>
</login-config>
<security-role>
<description>The admin role</description>
<role-name>admin-role</role-name>
</security-role>
</web-app>
02.02. sun-web.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sun-web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Sun ONE Application Server 8.0 Servlet 2.4//EN" "http://www.sun.com/software/sunone/appserver/dtds/sun-web-app_2_4-0.dtd">
<sun-web-app>
<context-root>mejbjsp</context-root>
<class-loader delegate='true'/>
<ejb-ref>
<ejb-ref-name>ejbs/mejb</ejb-ref-name>
<jndi-name>ejb/mgmt/MEJB</jndi-name>
</ejb-ref>
<security-role-mapping>
<role-name>admin-role</role-name>
<group-name>asadmin</group-name>
</security-role-mapping>
</sun-web-app>
03. Package the above into a war module and deploy it.
asadmin> deploy mejb_jsp.war
04. Invoke the jsp using a web browser, say http://<host-name>:<port>/mejbjsp
When login window pops up, you may enter user name and password which has asadmin role.