Scala Bot for Small Businessyllan @ ScalaConf.jpMarch 2, 2013

Who Am I?

藍永倫 @yllan

Working at Hypo (http://hypo.cc)

Scala 下忍（⾃自称）しもおし

Why am I here?初心者

Scala:Scalable Language

Scala:Scalable Language

拡大縮小が可能なさま。拡張性があるさま。Able to be changed in size or scale.

scale-UP & scale-OUT

scale-down & scale-in?

Scala is good at BIG.

大 > 小BIG > small

Scala is good at small?

RUBY SCALA

A lot of small business!

Right Toolfor

Automation

Scala for script? Hmm…

Cons for scala scripting

Cons for scala scripting

Slow compile

Cons for scala scripting

Slow compile

scala -savecompiled script.scala

Cons for scala scripting

Slow compile

scala -savecompiled script.scala

Hard to memorize classpath

Cons for scala scripting

Slow compile

scala -savecompiled script.scala

Hard to memorize classpath

JVM boot overhead

Cons for scala scripting

Slow compile

scala -savecompiled script.scala

Hard to memorize classpath

JVM boot overhead

nailgun? Hmmm

Cons for scala scripting

Slow compile

scala -savecompiled script.scala

Hard to memorize classpath

JVM boot overhead

nailgun? Hmmm

Default I/O library

Recommended lib

rapture.io (http://rapture.io)

File / "home" / "work" / "contents" > Socket("localhost", Services.Tcp.telnet)

dispatch (http://dispatch.databinder.net/)

val svc = url("http://hostip.info/country.php")val country = Http(svc OK as.String)

TIPSScala REPL comes to rescue!:cp - add a jar/dir to classpath

:load - load a scala file

:shscala> :sh find . -name *.mres0: s.t.n.i.ProcessResult = `find . -name *.m` (23 lines, exit 0)scala> res0.exitCoderes1: Int = 0scala> res0.linesres2: List[String] = List(...)

import scala.sys.process._

I ♡ scala REPL!

For non-geek?

SHIT HAPPENS.

DANGEROUS!

Only permit trained people use the guns; or

Make your gun super safe.

Solutions

Take our company as example…

“Make gun safe” strategy works?

Too many system!

Let the trained people do.

COLLEAGUE MEIM RUN

SCRIPT

COLLEAGUE BOTIM RUN

SCRIPT

IM

XMPP

AIM

Google Talk

Facebook Messenger

Smack Library (http://www.igniterealtime.org/projects/smack/)

Command Parsing

Regex + extractor

Every command is a PartialFunction

Happy!

That’s my little story about scala.

Q & A