Talk about Scala's ecosystem, and examples of a quickly crafted Scala project using Play 2, Akka and Spark

1. Softwares
Crafted
And
Libraries
Available

2. @NOOOTSAB
Proud husband and father
po l'bonLidjeu
Have to wear glasses since Maths graduation in '03
Learn to dress well since CS graduation in '05
Lost myself since expertize in Geomatic and GIS
Risking myself in (GIS, Big Data and Scala)
Public interest work: co-founded
Helper and organizer of
Scala
NextLab
Wajug
Devoxx4Kids
trainer

3. SOFTS (AND COMPANIES)
New companies popping out every day
Market leaders are taking the step as well
Examples?

4. THE WHY FIRST?
Scala has a reputation to be accessible
It eases the maths (mostly [matrix] algebra)
The CS world is changing (fast)
It shifts from the cloud to analysis

5. MIND CANDY
Expressivity
Tests (spec)
Type system byte code manipulation
REPL
Akka
Kafka

6. COURSERA
10⁶ online students
PHP → Scala
Concurrency primitives
Play
Type safety
Ecosystem

7. MEETUP
10⁶ attendants worldwide
Marketing and announcement broadcasts
Functional programming beside statistical one

8. TWITTER
REPL
case classes
productivity gains
concise code
Scala school
Tens of open
source libs

9. KLOUT
10⁹ API call ... a day
1To ... a day (using Iteratee)
Play! 1⇝ Play! 2

10. NETFLIX
Billion devices
Historical events
Real-time analytics
Proper API (Option)
Async (Try)
Scalatra + ScalaTest

11. AND MORE
AirBnB
Snips (smart cities, ...)
Tuplejump (analytic platform)
eBay (analytics)
BBC (Future Media project)
Virdata (IoT analytic platform)
Ooyala (video analytic platform)

12. LIBRARIES (AND FRAMEWORKS)
Of course, there is a fashion/hype effect
Open doors for rewriting
Sometimes for good reasons
But, offered new visions, ways too

13. AKKA
Actor model
Supervision (fault-tolerant)
Cluster mode
Location transparency
All thanks to MPS
Scala for:
immutability features
functional style
type safety (channel)

14. SLICK
Simple DB access
Not an ORM
Yet allows type safe mapping
Data collection as first class citizen

15. SPRAY | FINAGLE
Meant for back-end services
Agnostic of the protocols
Async
Spray
DSL for routing, ...
Great reactive IO Layer
Finagle
Great support of binary protocols
Failure detection
Load balancing

16. SPARK
Map Reduce ~ Callback Hell of Big Data
Resilient Distributed Dataset
Fault-tolerant and resilient: Lineage
DAG and Optimization: Stage
In-memory (fallback on disk, tachyon, ...)

17. PLAY! 2
Shortens the development lifecycle!
Type safety and code everywhere
RESTful friend
Integrated
HTTP based
Reactive (end-to-end)
Async as line of conduct
A request can be long -- WS comes for free

18. MAHOUT
Ted Dunning
says,
Scala
because...
Maths are easier
Lazy eval are handy
Compacity
DSL

19. AND MORE
Pickling Gatling
Algebird
Iago
Kafka
Axle
Saddle
ScalaNLP
Cassovary
Shapeless
GeotrellisScalding

20. SHOWTIME
Vote client: Play! 2
Vote-server: Akka
Vote-results: Spark
sources