Existing web applications integrating into JBoss Portal

[swathish]

I would like to know what are the possibilities to migrate an existing web application into a portlet applicated deployed in JBoss Portal ?
The application is a Struts based application. So, there is only a unique servlet to modify (I think)... That's why I would like to know if it is enough to modify the Struts servlet into a JBoss portlet, to make the application work in the new environment ?
The web application is an ear package which works good on JBoss.

[ben.wang]

And there is also a clustering problem?

[swathish]

Yes, one of the application is developed in clustering environment.