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copied!<p>Google makes heavy use of Protocol Buffers in JS (GMail, etc.) through their Closure Library, generating JS code with a (unfortunately non-open-sourced) modified <code>protoc</code> (it would probably have to be <em>ported</em> to a <code>protoc</code> extension before being open-sourced).</p> <p>Apache Wave (whose <em>client</em> webapp is built with GWT) also uses Protocol Buffers for its communications with the server, generating Java code by reflecting on the Java classes produced by <code>protoc</code> (this is the PST, aka protobuf-stringtemplate, subproject).<br> Previously, Wave was using <a href="http://code.google.com/p/protostuff/" rel="nofollow noreferrer">protostuff</a> (and I don't know why they switched to their own solution, I suspect PST is derived from what the original Google Wave was using, and protostuff was only an intermediate step during the move to open-source).</p> <p>As a side note, I started exploring using Protocol Buffers on the browser side a while ago: <a href="http://blog.ltgt.net/exploring-using-protobuf-in-the-browser/" rel="nofollow noreferrer">http://blog.ltgt.net/exploring-using-protobuf-in-the-browser/</a> & <a href="http://blog.ltgt.net/using-protobuf-client-side-with-gwt" rel="nofollow noreferrer">http://blog.ltgt.net/using-protobuf-client-side-with-gwt</a> with some almost-working code at <a href="http://code.google.com/p/protobuf-gwt/" rel="nofollow noreferrer">http://code.google.com/p/protobuf-gwt/</a> that you might want to resurrect.</p> <p>Finally, there's work underway to make GWT RequestFactory proxies compatible with the server-side Java classes generated by <code>protoc</code> (and you could use a <code>protoc</code> extension or a similar approach to Wave's PST to generate your RequestFactory proxies). It should already be possible, provided you use builders all the way on the server-side (which is not quite how the Protocol Buffers Java API was designed).</p>

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