![Then, the AST becomes JVM bytecode
AST bytecode
mirah -e "puts 'RubyKaigi'+(167*12+6)"; javap -c DashE
RubyKaigi2010
Compiled from DashE
public class DashE extends java.lang.Object{
public static void main(java.lang.String[]);
Code:
0: getstatic #12; //Field java/lang/System.out:Ljava/io/PrintStream;
3: ldc #14; //String RubyKaigi
5: sipush 167
8: bipush 12
10: imul
11: bipush 6
13: iadd
14: invokestatic #20; //Method java/lang/String.valueOf:(I)Ljava/lang/
String;
17: invokevirtual #24; //Method java/lang/String.concat:(Ljava/lang/
String;)Ljava/lang/String;
20: invokevirtual #30; //Method java/io/PrintStream.println:(Ljava/lang/
String;)V
23: return
public DashE();
Code:
0: aload_0
1: invokespecial #36; //Method java/lang/Object."<init>":()V
4: return
9 }
Sunday, August 29, 2010](https://image.slidesharecdn.com/rejectkaigi-2010-100829044250-phpapp01/85/Rejectkaigi-2010-9-320.jpg)
![Dubious is Web framework for Mirah
Dubious Mirah Web
*du bi ous[ djbis | dj- ] [ ]
[1] (( )) …
((of, about, as to ...)).
[2]
>
11
Sunday, August 29, 2010](https://image.slidesharecdn.com/rejectkaigi-2010-100829044250-phpapp01/85/Rejectkaigi-2010-11-320.jpg)
Uploaded byJohn Woodell
Rejectkaigi 2010
This document discusses Mirah and Dubious, a staticly typed language and web framework. Mirah compiles to JVM bytecode for fast performance without a runtime. Dubious allows writing code similar to Rails and works on Google App Engine. Examples show Dubious controllers and templates are similar to Rails while models are simpler. It spins up quickly and works well on App Engine.
Rejectkaigi 2010
- 1.
- 2. Mirah/Dubious John Woodell Takeru Sasaki RejectKaigi 2010 2 Sunday, August 29, 2010
- 3. Thank you forusing "AppEngine/JRuby” "AppEngine/JRuby" 3 Sunday, August 29, 2010
- 4. Spin-up? Yes, this is a problem... 4 Sunday, August 29, 2010
- 5. ...but now youcan use Mirah and Dubious "Mirah/Dubious" 5 Sunday, August 29, 2010
- 6. Mirah is a staticly typed language, that uses type-inference Mirah Ruby JVM 6 Sunday, August 29, 2010
- 7. Now, how doesit work? (minus a few boring details) 7 Sunday, August 29, 2010
- 8. First, JRuby’s Parcercreates AST JRuby AST mirahp -e "puts 'RubyKaigi'+(167*12+6)" Script Body Call(println) Call(out) Constant(System) Call(+) String("RubyKaigi") Call(+) Call(*) Fixnum(167) Fixnum(12) Fixnum(6) 8 Sunday, August 29, 2010
- 9. Then, the ASTbecomes JVM bytecode AST bytecode mirah -e "puts 'RubyKaigi'+(167*12+6)"; javap -c DashE RubyKaigi2010 Compiled from DashE public class DashE extends java.lang.Object{ public static void main(java.lang.String[]); Code: 0: getstatic #12; //Field java/lang/System.out:Ljava/io/PrintStream; 3: ldc #14; //String RubyKaigi 5: sipush 167 8: bipush 12 10: imul 11: bipush 6 13: iadd 14: invokestatic #20; //Method java/lang/String.valueOf:(I)Ljava/lang/ String; 17: invokevirtual #24; //Method java/lang/String.concat:(Ljava/lang/ String;)Ljava/lang/String; 20: invokevirtual #30; //Method java/io/PrintStream.println:(Ljava/lang/ String;)V 23: return public DashE(); Code: 0: aload_0 1: invokespecial #36; //Method java/lang/Object."<init>":()V 4: return 9 } Sunday, August 29, 2010
- 10. "Pure JVM bytecode" We don't need a Runtime. This is very, very fast! bytecode JRuby Runtime 10 Sunday, August 29, 2010
- 11. Dubious is Webframework for Mirah Dubious Mirah Web *du bi ous[ djbis | dj- ] [ ] [1] (( )) … ((of, about, as to ...)). [2] > 11 Sunday, August 29, 2010
- 12. Write Rails-style code, it runs on Google App Engine GoogleAppEngine Rails 12 Sunday, August 29, 2010
- 13. Here’s code fromDubious, this is not Rails! Rails Dubious 13 Sunday, August 29, 2010
- 14. Dubious controllers willbe familiar Sunday, August 29, 2010
- 15. Mirah can useERb templates Sunday, August 29, 2010
- 16. The models aresimple (no schema) Sunday, August 29, 2010
- 17. It really works, and spins-up in ~1sec Spinup. 17 Sunday, August 29, 2010
- 18. It isn’t "Dubious" Thank you! http://mirah.org http://dubious-demo.appspot.com @johnwoodell & @urekat 18 Sunday, August 29, 2010
- 19.