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GWT Hot Swapping

Scott Selikoff
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Joined: Oct 23, 2005
Posts: 3749

Does anyone have experience with hot swapping new GWT modules for existing ones? In some sense, it is just a matter of replacing the WAR, and hot swapping of servlet providers is well understood, but does the same hold true for GWT applications?

In particular, since compiled GWT applications rely on hash-based MD5 JavaScript files, its not clear what happens if a server changes GWT modules while a user is connected. Does the user have to start over?

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Maneesh Godbole
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Joined: Jul 26, 2007
Posts: 10767

Wouldn't the user get something like This application is out of date, please click the refresh button on your browser. ( Expecting version 5 from client, got 6. )

I remember getting this once. Most probably it was after changing the GWT version in eclipse. I shut down jetty, did a clean build and got it working.

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subject: GWT Hot Swapping
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