Google Cloud Endpoints allows developers to easily add RESTful APIs to an App Engine project. It generates API and client libraries from annotated App Engine code. The development process involves writing App Engine backend code, annotating it, generating client libraries, and using those libraries to build clients. Endpoints supports Java and Python runtimes and makes it simpler to build web and mobile backends that integrate with App Engine.

1. Google Cloud Endpoints
How to add RESTful APIs to an App Engine
project
Mattia Gasperotti, GDG Trento

2. Introducing Google Cloud Endpoints
Google Cloud Endpoints consists of tools that
allow you to generate APIs and client libraries
from an App Engine application.
Endpoints makes it easier to create a web
backend for web clients and mobile clients
(Android, iOs…)

3. Basic Endpoints Architecture

4. Supported App Engine runtimes
developers.google.com/appengine/docs/java/endpoints/overview
developers.google.com/appengine/docs/python/endpoints/overview

5. The development process
1. Write your App Engine backend code as usual
2. Annotate your App Engine backend code (so classes
and client libraries can be generated from it).
3. Generate the client library using Google Plugin for
Eclipse [or endpoints.sh (for Linux), or endpoints.cmd
(for Windows)]
4. Write your client app using the generated client
libraries

6. @Annotation
Endpoint annotations describe API
configuration, methods, parameters, and other
vital details that define the properties and behavior
of the Endpoint
https://developers.google.com/appengine/docs/java/endpoints/annotations

7. Generate Google Cloud Endpoint
Client Library
https://developers.google.com/eclipse/

8. APIs Explorer
The Google APIs Explorer is a tool that helps you explore
various APIs.
With the APIs Explorer, you can:
● Browse available APIs and versions.
● Explore: see methods available for each API and what
parameters they support along with inline
documentation.
● Test: execute requests for any method and see
responses in real time.

9. Example: https://namekeepr.appspot.com/_ah/api/explorer

10. Code time: simple blog

11. Some backend code (Java)

12. Add @Annotation

13. Generate Cloud Endpoint
Client Library

14. Use generated libs (Android)

15. Use generated libs (iOs)

16. ...and with Javascript...
Javascript use the same JS client that Google provides for their own APIs

17. Some usefull link
Java
● Docs: developers.google.com/appengine/docs/java/endpoints/overview
● Sample: github.com/GoogleCloudPlatform/appengine-endpoints-tictactoe-
java
Python
● Docs: developers.google.com/appengine/docs/python/endpoints/overview
● Sample: github.com/GoogleCloudPlatform/appengine-endpoints-tictactoe-
python

18. Thank you!
Google Plus gplus.to/gasperotti
Twitter Mattia93it
www mattiagasperotti.com
Facebook /gasperotti