Call a local Interface from a Servlet

[iddy]

Hi

I am try to pass the HttpservletRequest and HttpServletResponse objects to my EJB application layer. I have a servlet (Controller) that obtains a remote reference to a Session EJB (WorkflowController) and invokes its process method(HtppServletRequest, HttpServletResponse).

However, this approach fails because the actual implementations of the request and response objects are not serializable and so cannot be passed in the remote call. I have made a working assumption that I can add a Local Interface to my session EJB and call the process method locally (passing the request and response objects by reference). I have created the Local interface and added it to my ejb jar file and ejb-jar.xml (below)



<ejb-jar>
<display-name>workflow</display-name>
<enterprise-beans>

<display-name>WorkflowControllerBean</display-name>
<ejb-name>WorkflowController</ejb-name>
com.intelligentdecisioning.excalibur.merlin.WorkflowControllerHome
com.intelligentdecisioning.excalibur.merlin.WorkflowController
<local-home>com.intelligentdecisioning.excalibur.merlin.WorkflowControllerLocalHome</local-home>
com.intelligentdecisioning.excalibur.merlin.WorkflowControllerLocal
<ejb-class>com.intelligentdecisioning.excalibur.merlin.WorkflowControllerBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Bean</transaction-type>
<security-identity>

<use-caller-identity></use-caller-identity>
</security-identity>

</enterprise-beans>
</ejb-jar>



However, I dont know how to get a reference to the Local Interface to make the call (i.e what is its jndi name ?). I have made serveral attempts but keep getting jndi lookup failures (name not bound) - could someone please explain how to get and call the local interface or send me an example

I am using jboss_2.4.4 with tomcat 4.1 (running together)


Thanks

Iddy

[adrian.brock]

There's an example in this thread.

http://main.jboss.org/thread.jsp?forum=47&thread=10656

Regards,
Adrian

[jmoring]

This example is missing the web.xml for the Servlet that is making use of a local ejb reference. Is there a complete example anywhere that shows all the necessary components required for accessing ejbs from a servlet using a local interface. I always get a "ejb not registered" error when trying to access the ejb in java:comp/env
Thanks

[adrian.brock]

Here's the web.xml for that example.

http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/jboss/jbosstest/src/resources/web/WEB-INF/jbosstest-web.xml?annotate=1.2

You can find the local references at the bottom.

Regards,
Adrian

[jmoring]

Thanks so much. This completes the configuration picture for me. I am running 2.4.4 and it seems this version of the AbstractWebContainer does not support local EJB references. Is there a 2.4.5 in the work or is the 2.4.x line complete? My preference would not be to download the current sources and create a custom build. This there a patch methodology for introducing updated classes to existing builds?

Thanks
Jim

[adrian.brock]

There is a 2.4.5 branch in CVS
for the next maintenance release of the 2.4

If you want to submit a patch, submit it on sourceforge
against 2.4.4 (stable)
http://sourceforge.net/tracker/?group_id=22866&atid=376687

Regards,
Adrian

[scotticek]

Hi,

Where did you see that JBoss 2.4.4 does not support ejb local lookups? Can someone please confirm whether JBoss 2.4.4 does or does not support local ejb lookups from servlets.

Many thanks
Scott

[adrian.brock]

http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/jboss/jboss/src/main/org/jboss/web/AbstractWebContainer.java

Support added at version 1.4.4.12
2.4.4 is 1.4.4.9

Regards,
Adrian