by Lukas Masuch, Henning Muszynski and Benjamin Raethlein Originally held on 'Karlsruhe Entwicklertag 2015' In this presentation we give an overview on several services of the Google Cloud Platform and showcase an Android application utilizing these technologies. We cover technologies, such as Google App Engine, Cloud Endpoints, Cloud Storage, Cloud Datastore and Google Cloud Messaging (GCM). We will talk about pitfalls, show meaningful code examples (in Java) and provide several tips and dev tools on how to get the most out of Google’s Cloud Platform.

1. Building a scalable mobile application on
Google Cloud Platform

2. About us
Lukas Masuch
Google+: +LukasMasuch Twitter: @lukasmasuch
Henning Muszynski
Google+: +HenningBalboa Twitter: @henningmus
Benjamin Räthlein
Google+: +BenjaminRäthlein Twitter: @B3nRa

3. DropMake the world around you more social

6. Google Cloud Platform

7. Google Cloud Platform

8. Cloud Platform – Compute
Container Engine: Run Docker container cluster on
Google Cloud Platform – Container-as-a-Service
App Engine: Deploy your code directly to a fully-
managed platform - Platform-as-a-Service
Compute Engine: Virtual machines hosted on
Google's infrastructure - Infrastructure-as-a-Service

9. Cloud Platform – Storage Options
Cloud Datastore: Store highly structured objects and
query with SQL-like statements
Cloud SQL: Full SQL support for an online transaction
processing (OLTP) system
Cloud Storage: Store immutable blobs larger than
10 MB, such as large images or videos
Cloud BigTable: High-performance, extremely
scalable NoSQL database, scales to billions of entries

10. Google Cloud Platform

11. Cloud Datastore
Cloud StorageCloud Endpoints File ServletGCM Endpoint
Objectify
Other Dev Tools
App Engine

12. App Engine
Cloud Endpoints

13. 1. Annotate 2. Generate 3. Run everywhere
Cloud Endpoint
REST has never been easier!
Automatically generate client libraries to make
wiring up the client to your backend easy.
+ Annotation based
+ Easy declaration of REST
methods and services
+ support for local testing
Really ?

14. Cloud Endpoint - Pitfalls
What we should have known before
Endpoint methods allow only one object as parameter
1
Enums are neither returnable nor allowed as parameters1..2..3
No native data types are returnable. Use Wrappers!int
Getter / Setter require to be named same as the member
variables. Otherwise duplicate methods are generated

15. App Engine
Cloud Datastore
Cloud StorageFile ServletCloud Endpoints

16. Cloud Datastore & Cloud Storage
Save everything in the cloud!
Datastore: Store all entities
Storage: Store all files
Better database design vs. less data operations
Cloud Storage: Convenient API for Images.
Additional Servlet for Files needed.
Manageable with an easy-to-use Interface on
Google Cloud Console

17. App Engine
Cloud Datastore
Cloud StorageFile ServletCloud Endpoints
Cloud Datastore
Cloud StorageFile ServletCloud Endpoints
Objectify

18. Objectify
The simplest convenient ORM for App Engine datastore
Enables you to store and retrieve your Object
directly from Cloud Datastore. It is that simple!
It just works like a charm!
+ Annotation based
+ Easy caching and indexing
+ Human-friendly query interface

19. App Engine
Cloud Datastore
Cloud StorageFile ServletCloud Endpoints
Cloud Datastore
Cloud StorageFile ServletCloud Endpoints
Objectify
GCM Endpoint

20. Google Cloud Messaging - Users want to be notified!
1. Registration
2. GCM ID
App Engine
Cloud Datastore
Cloud Endpoints GCM Endpoint
Objectify
3. Send GCM ID
to App Engine
4. push messages

21. App Engine
Cloud Datastore
Cloud StorageFile ServletCloud Endpoints
Cloud Datastore
Cloud StorageFile ServletCloud Endpoints
Objectify
GCM Endpoint

22. App Engine
Cloud Datastore
Cloud StorageFile ServletCloud Endpoints
Cloud Datastore
Cloud StorageFile ServletCloud Endpoints
Objectify
GCM Endpoint
Other Dev Tools

23. Resources & Links
Drop - Website
Google Cloud Playground (Python)
Github Repository – App Engine Skeleton

24. Lukas Masuch
Henning Muszynski
Benjamin Räthlein