Can Google App Engine / GWT plugin work with multi-module projects?

The getting started tutorial for Google App Engine / GWT describes a very simple application using a single eclipse project (module). I'm porting a JPA / Hibernate based project to GAE and have a service laye开发者_如何学JAVAr module. It all compiles but when I attempt to run as a web-app from eclipse, obviously it doesn't have access to the service layer.

How do I get Eclipse to build a Jar, and include it (with the src) in the GWT project module - i.e. deployed to the WEB-INF/lib directory?

I can't believe that Google are not addressing this and seem to have just skimmed over this gaping hole.

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You should use Ant and setup an Ant Builder that executes when you save your java classes to create the Jar

This should accomplish what you are looking for.