java - Is there a way to manage users' calendar appointments on App Engine? -

java - Is there a way to manage users' calendar appointments on App Engine? -

i want able book , manage appointments users of app engine project. these appointments specific app , should not show on users' google calendars.

is there existing service can leverage or have build out scratch? recommended approach building scratch?

edit: if utilize google calendar api, there way maintain user appointment info on app servers , not on users' google calendars?

if used google calendar api, appointment info automatically kept date. if imported appengine database, not.

i see no need reinvent wheel duplicate appointment info when pull date info form google calendar api.

java android google-app-engine calendar google-calendar