JDeveloper : debug at runtime

I just discovered a neat functionnality, allowing you to easyly be aware of what's happening when you test-run you application.

Right click your project (for a fusion web application, it's ViewController here), go to the project properties. In the tab Run/Debug, edit the profile you want and in the input Java Options, add or insert this :
-Djbo.debugoutput=console

Now test-run your application : you'll see in the console everything the framework does, and I tell you, it's priceless when it comes to debugging at runtime.