EJB Lookup

1. When deploying EJB, it has a name(if specified using annotation : @Stateless(name="SessionEJB") or if descriptor: <ejb-name>SessionEJB</ejb-name>.

2. This EJB deployed to OC4J. Now to do a lookup for this EJB, we can use either ApplicationClientInitialContextFactory or RMIInitialContextFactory.

3. In case of RMIInitialContextFactory, no need of application-client.xml and the context lookup will be : new InitialContext.lookup("SessionEJB").

4. In case of ApplicationClientInitialContextFactory, we need application-client.xml. It has to introduce the ejb refrence going to be used in code as:

<application-client 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/application-client_1_4.xsd" version="1.4" xmlns="http://java.sun.com/xml/ns/j2ee">
<display-name>InterceptorTest-app-client</display-name>
<ejb-ref>
<ejb-ref-name>ejb/SessionEJB</ejb-ref-name>
<ejb-ref-type>Session</ejb-ref-type>
<remote>myEJB.SessionEJB</remote>
<ejb-link>SessionEJB</ejb-link>
</ejb-ref>
</application-client>

5. Here, ejb-link is used to link to the actual bean. Now, in the client code we use the ejb-ref-name for lookup as:

new InitialContext().lookup("java:comp/env/ejb/SessionEJB");