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Re: JNDI Name for EJB3

by Rex Wang-2 :: Rate this Message:

hi Juergen,

Here is my note..
EJB Project=================================================

@Remote
interface Converter

@stateless
public class ConverterBean implements Converter

Web Project=================================================

1 Add dependency in geronimo-web.xml
    <sys:dependency>
        <sys:groupId>default</sys:groupId>
        <sys:artifactId>CurrencyConvertEJB</sys:artifactId>
        <sys:version>1.0</sys:version>
        <sys:type>car</sys:type>
    </sys:dependency>

2 Ref the EJB
(1) Method 1
in web.xml--------------
    <ejb-ref>
        <ejb-ref-name>ConverterBean</ejb-ref-name>   
        <ejb-ref-type>Session</ejb-ref-type>
        <remote>ejb.Converter</remote>
    </ejb-ref>

in jsp------------------
    <%@ page import="javax.naming.*" %>
    <%@ page import="ejb.Converter" %>
    <%
    Context ctx = new InitialContext();
    Converter ref = (Converter)ctx.lookup("java:comp/env/ConverterBean");
    %>

(2) Method 2
in geronimo-web.xml-------
    <name:ejb-ref>
        <name:ref-name>ejb/SessionBean</name:ref-name>
        <name:ejb-link>ConverterBean</name:ejb-link>
    </name:ejb-ref>

in web.xml----------------
    <ejb-ref>
        <ejb-ref-name>ejb/SessionBean</ejb-ref-name>
        <ejb-ref-type>Session</ejb-ref-type>
        <remote>ejb.Converter</remote>
    </ejb-ref>

in jsp--------------------
    <%@ page import="javax.naming.*" %>
    <%@ page import="ejb.Converter" %>
    <%
    Context ctx = new InitialContext();
    Converter ref = (Converter)ctx.lookup("java:comp/env/ejb/SessionBean");
    %>



HTH.

Rex

2009/6/18 Juergen Weber <weberjn@...>

OK, I got it to run with <ejb-local-ref> using the sample from
http://cwiki.apache.org/GMOxDOC20/very-simple-session-ejb-example.html

(which does contain a web.xml)

<ejb-local-ref>
<ejb-ref-name>ejb/Secured3</ejb-ref-name>
<ejb-ref-type>Session</ejb-ref-type>
<local>ejb3.Secured3</local>

</ejb-local-ref>

context = new InitialContext();
Secured3 secured3 = (Secured3) context.lookup("java:comp/env/ejb/Secured3");

I also needed a sys:dependency from geronimo-web.xml to openejb-jar.xml to
make the remote interface known to the JSP (this is missing in the above
sample).
First I simply included the ejb.jar into WEB-INF/lib, but this results in
ClassCastException on JNDI lookup (I guess because the Remote interface in
JNDI is from a different (the ejb) classloader than the cast target which is
from the web application).

Thanks,
Juergen

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