Netbeans 7 code completion doesn't work with Play framework

I've created Play appliacion wit开发者_运维问答h play new project command, and then play netbeansify project. I've opened the poject, and Ctrl+space shows "no suggestions" in my Application.java, and there is a wrench badge and "Needs to be compiled" message next to each file.

Is it possible to make Netbeans work with play apps?