we are using WebSphere Application Server 6.1 (which implements J2EE 1.4), so I need to know which version of GWT we can use. I fear that GWT 2.0 does use a newer version of the servlet specification?
I cannot find any information using a search engine. Can you please provide some information? Thank you...
If you use the webAppCreator or the eclipse plugin to create a project structure, it provides you a skeleton project. Navigate to yourProject/WEB-INF/web.xml and peek at it. You should find the version listed there.
You do NOT need to use Servlets at all to communicate with a server (I was not aware of this before)! You can also use e.g. XML or JSON to communicate with a server. One of my colleagues used this possibility, because he had to communicate to a Ruby server, so Servlets were not available.
Therefore, you also should be able to use the Servlet version you want.