AppEngine: Get current serving application version

Question

Is there a simple way to get the current serving application version in AppEngine?

Answer 1

os.environ['CURRENT_VERSION_ID']

Answer 2

String version = SystemProperty.version.get(); String applicationVersion = SystemProperty.applicationVersion.get(); 

This is the syntax:

public static final SystemProperty applicationVersion 

The major version number for the currently running version of the application plus a timestamp at which it was deployed. Has the key, "com.google.appengine.application.version".

See here

PS. One puzzle still remains. What does timestamp next to version means and how to read it??

EDIT: Here is the key to the mystery.

 Date UploadDate = new Date(Long.parseLong(    applicationVersion.substring(applicationVersion.lastIndexOf(‌​".")+1))    / (2 << 27) * 1000);