- 2 days in Budapest
- Single-track conference with 2 keynotes & 12 talks
- ~150 people
6 Scala enthusiasts from Vienna were at ping conf
Best Of
Sadek Drobi
Why is Play done the way it is?
Aims of Play framework
- Simplicity
- Dev productivity
- HTTP/Web friendliness
What is the most simple thing?
a function
- simple
- truthful about type
-
composable
A => B
B => C
A => C
Action in Play
Just a function: Request => Result
Is this enough?
RequestHeader =>
Iteratee[Array[Byte], Result]
Is functional programming scary?
You don't have to deal with Iteratee
the BodyParser
takes care of it
Simple things are simple
If you want to do streaming stuff it is more complicated of course
Composability
most important thing about FP
Christopher Hunt
Javascript functionality coming to Play 2.3
Make Play a great choice for JS development
sbt-web
a sbt plugin factored out of Play
handles the asset pipeline
Per default Rhino-based
Other JS engines like Node can be configured
sbt-jshint-plugin
parallel execution
incremental execution
Christopher recommends to start a Play project via Activator
WebJars will get CDN support in production
Yevgeniy Brikman
aka Jim
Building composable, streaming, testable Play apps
functions compose
Play actions are just functions
Play has great streaming support
Showed how to implement Facebook BigPipe with Play
Inspiring how he composed the basic building blocks
James Roper
tech lead for Play
Play is for Performance
What is performance?
Play is about scalability
But reactive apps are slower that single-threaded because of context switching
Was mitigated Play 2.2 using a trampoline execution context which executes short-running operations on the same thread
If you have blocking operations in your app (e.g. JDBC) use separate execution context for these
Johan Andrén
Async: Reacting instead of waiting for better times
Johan explained futures and actors with visual very attractive graphics
Great resource for understanding the concepts quickly
was a great conference
Conference web site at http://www.ping-conf.com
Videos of presentations available at http://www.ustream.tv/pingconf