title: How to implement OAuth 2.0 in Google Cloud Endpoint - Java
body: <p>I am looking for Oauth 2.0 implementation to Google Endpoint project developed in Java. Client will be web and Android.
  Kindly suggest how to implement it. I have searched lot of google docs. Each doc details something but I couldn't connect dots basically. Anyone has implemented OAuth 2.0 in Google Endpoint ?</p>