Re: IntelliJ 15, SuperDevMode, AppEngine, Gradle

After further research, I discovered a very tricky and hard to detect bug: I forgot the damn entry point in my .gwt.xml

ouch..glad you have found it :) I would have probably searched whole day long.

As a related question, Is there any way to debug SDM and AppEngine server at the same time??

Debugging client side code is generally done in the browser's dev tools through source maps. As you use IntelliJ 15 you could check the "with javascript debugger" checkbox in your GWT run configuration and then also install the Jetbrains Chrome plugin. When doing so IntelliJ creates an additional JavaScript debugger run configuration that will automatically launched when launching GWT run configuration (but you can also start it manually). IntelliJ is then connected to Chrome as remote debugger (your page in the browser should show a yellow notice at the top saying that Jetbrains is debugging that page). If everything works you should be able to set breakpoints in your Java files inside IntelliJ and debug your code in your IDE instead of the browser. But keep in mind that you are still debugging JavaScript though source maps, you only swapped Chrome Dev Tools with your IDE. 

Also you must close Chrome Dev Tools to make it work as only one debugger can be active. As soon as you open Chrome Dev Tools, debugging through IntelliJ  will stop until you close Chrome Dev Tools again and relaunch the JavaScript debugger run configuration.

You server side code on your AppEngine server can be debugged like any other Java process. If you launch the server through IntelliJ then you can just use the "debug" button to launch it. Otherwise you must use Java's remote debugging capabilities by creating a remote debugger run configuration in IntelliJ and launch AppEngine server with debugging enabled.

-- J.

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