GWT RPC server-side requirements

[Drew]

I am trying to understand the requirements for setting up the server-
side components for GWT RPC. I see that the minimum Java version
supported is 1.4 but I was wondering if that is the case mainly on the
client side or is it also on the server side. (By the way, what would
someone suggest is the best guide out there for setting up the server
side components and doing a sample service using GWT RPC?)

I unfortunately have to use a Java 1.3 server at the present. If I do
need 1.4 to use the GWT RPC, am I correct in reading that I can use my
own RPC method (so maybe come up with something that works on 1.3..)
If so can someone suggest what they think would be the next-easiest
approach in terms of what would work well with GWT (since the docs say
GWT RPC makes the services calls very easy.. would be great to keep
things easy...) Also looking for a good example along these lines if
someone knows of a site out there.

Thanks,
Drew

[Reinier Zwitserloot]

Just try it and see.

If it doesn't work, use JSON-over-RequestBuilder.