Scala can be used for automation scripts for small businesses, though it has some drawbacks for scripting like slow compilation and JVM overhead. The Scala REPL is useful for testing scripts. A recommended approach is to create a bot that trained colleagues can message commands to, which then runs scripts safely, avoiding the downsides of direct access. Libraries like Rapture IO, Dispatch, and Smack can help with common tasks like file access and messaging.

1. Scala Bot
for Small Business
yllan @ ScalaConf.jp
March 2, 2013

2. Who Am I?
藍永倫 @yllan
Working at Hypo (http://hypo.cc)
しもおし
Scala 下忍（⾃自称）

3. 初心者
Why am I here?

4. Scala:
Scalable Language

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

6. scale-UP & scale-OUT

7. scale-down & scale-in?

8. Scala is good at BIG.

9. 大>小
BIG > small

10. Scala is good at small?

11. RUBY SCALA

13. A lot of small business!

15. Right Tool
for
Automation

16. Scala for script?
Hmm…

17. Cons for scala scripting

18. Cons for scala scripting
Slow compile

19. Cons for scala scripting
Slow compile
scala -savecompiled script.scala

20. Cons for scala scripting
Slow compile
scala -savecompiled script.scala
Hard to memorize classpath

21. Cons for scala scripting
Slow compile
scala -savecompiled script.scala
Hard to memorize classpath
JVM boot overhead

22. Cons for scala scripting
Slow compile
scala -savecompiled script.scala
Hard to memorize classpath
JVM boot overhead
nailgun? Hmmm

23. Cons for scala scripting
Slow compile
scala -savecompiled script.scala
Hard to memorize classpath
JVM boot overhead
nailgun? Hmmm
Default I/O library

24. 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)

25. TIPS
Scala REPL comes to rescue!
:cp - add a jar/dir to classpath
:load - load a scala file
:sh
scala> :sh find . -name *.m
res0: s.t.n.i.ProcessResult = `find . -name *.m` (23
lines, exit 0)
scala> res0.exitCode
res1: Int = 0
scala> res0.lines
res2: List[String] = List(...)
import scala.sys.process._

26. I ♡ scala REPL!

27. For non-geek?

31. SHIT HAPPENS.

32. DANGEROUS!

33. Solutions
Only permit trained people use the guns; or
Make your gun super safe.

34. Take our company as
example…

36. “Make gun safe”
strategy works?

39. Too many system!

40. Let the trained people
do.

41. COLLEAGUE ME SCRIPT
IM RUN

42. COLLEAGUE BOT SCRIPT
IM RUN

43. IM
XMPP
AIM
Google Talk
Facebook Messenger
Smack Library (http://www.igniterealtime.org/
projects/smack/)

44. Command Parsing
Regex + extractor
Every command is a PartialFunction

46. Happy!

47. That’s my little story
about scala.

48. Q&A