Do you have any comments on using GWT with Appengine?
Here is a screencast on the topic: Using Java (GWT) with Google App Engine
The functionality seems very limited though, since GAE uses Python + JavaScript and not Java.
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Since Google AppEngine now supports Java using GWT, it is much easier (for example you can use GWT RPC).
Take a look at the screencast .
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Can you elaborate on why using GWT with the Java version of GAE is necessarily a good idea?
I don't mind this and it seems obvious that Java is the way to go, but just wanted to hear specific reasons.
To answer my own question, GWT provides an interface called "GWT RPC" that allows you to talk directly to Java Servlets, therefore it offers an amazing level of integration between client and server.
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The crux of the problem with GWT and GAE is that you want to use JDO to persist objects when using GAE, and bytecode manipulation performed by the kernel (JDO implementation) makes your domain objects no longer work with "GWT-RPC".
The best solution today is probably the Gilead GWT adapter for Google App Engine , which is currently in its early stages.