Softwares
Crafted
And
Libraries
Available

@Noootsab

Proud husband and father

Lidjeu po l'bon

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 NextLab (GIS, Big Data and Scala)
Public interest work: co-founded Wajug
Helper and organizer of Devoxx4Kids
Scala trainer

Softs (and companies)

New companies popping out every day
Market leaders are taking the step as well
Examples?

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

Mind Candy


Expressivity
Tests (spec)
Type system byte code manipulation
REPL
Akka
Kafka

Coursera

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

Meetup

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

Twitter


REPL
case classes
productivity gains
concise code

Scala school
Tens of open source libs

Klout


10⁹ API call ... a day
1To ... a day (using Iteratee)

Play! 1⇝ Play! 2

netflix


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

And more

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

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

Akka

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

Slick

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

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

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, ...)

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

mahout

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

And more

Gatling
Iago
Algebird
Kafka
Axle
Saddle
ScalaNLP
Cassovary
Scalding
Pickling
Shapeless
Geotrellis

Showtime

Vote client: Play! 2
Vote-server: Akka
Vote-results: Spark

Software Crafted And Libraries Available

By andy petrella

Software Crafted And Libraries Available

Talk about the SCALA ecosystem plus the whys and hows. Given for the Yajug (LU) the 27th of May, 2014

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