Monkeybars Tools-enabled Swing development with JRuby

Transcription

1 Monkeybars Tools-enabled Swing development with JRuby David Koontz JRuby fanboy, teacher, hockey player

2 This is a talk about Java 2

3 This is a talk about Java This is a talk about Ruby 3

4 This is a talk about JRuby This is a talk about Java This is a talk about Ruby 4

5 This is a talk about a developer trying to find a better way to write GUI applications 5

6 My Requirements Writable in something higher level than Java Not preventing me from using Java when needed Cross-platform Easy to distribute Securable (no exposed Ruby code) 6

7 Uniting two worlds > Why Ruby? 7

8 Uniting two worlds > Why Ruby? Popular language with good community support 8

9 Uniting two worlds > Why Ruby? Popular language with good community support Many convenient features for simplifying logic 9

10 Uniting two worlds > Why Ruby? Popular language with good community support Many convenient features for simplifying logic Good compliment to Java 10

11 Uniting two worlds > Why Ruby? Popular language with good community support Many convenient features for simplifying logic Good compliment to Java All the cool kids are doing it? 11

12 Uniting two worlds > Why Ruby? Popular language with good community support Many convenient features for simplifying logic Good compliment to Java All the cool kids are doing it? Duke approved! 12

13 Uniting two worlds > Why Ruby? > Why Swing? 13

14 Uniting two worlds > Why Ruby? > Why Swing? Included in consumer JREʼs 14

15 Uniting two worlds > Why Ruby? > Why Swing? Included in consumer JREʼs Well known Established bugs and workarounds 15

16 Uniting two worlds > Why Ruby? > Why Swing? Included in consumer JREʼs Well known Established bugs and workarounds Lots of tooling infrastructure 16

17 Uniting two worlds > Why Ruby? > Why Swing? Included in consumer JREʼs Well known Established bugs and workarounds Lots of tooling infrastructure I knew it better than SWT 17

18 Uniting two worlds > Why Ruby? > Why Swing? Included in consumer JREʼs Well known Established bugs and workarounds Lots of tooling infrastructure I knew it better than SWT Chet Haas and Romain Guy approved! 18

19 What Monkeybars is > Helpers for making GUI development easier with Swing > A guideline for how to structure your GUI application > Less complexity when dealing with complex applications 19

20 What Monkeybars is not > An abstraction layer for Swing > A self contained toolkit You will need to know some of the Swing API 20

21 Hello World 21

22 Monkeybars is a kind of MVC 22

23 Normal MVC setup Controller View Model 23

24 Monkeybars Controller Monkeybars configuration View Model 24

25 Monkeybars keeps the controller and the view separate Controller Monkeybars View 25

26 view.my_button.text = hello becomes model.button_text = hello update_view Monkeybars takes over here 26

27 Typical style Controller hello View 27

28 Monkeybars style Controller Monkeybars View hello Model 28

29 Monkeybars style update view Controller Monkeybars View Model 29

30 Monkeybars style update view Controller Monkeybars View Model 30

31 Monkeybars style update view Controller Monkeybars View Model hello 31

32 To each logic, a home > Monkeybars encourages the different kinds of logic to each live in their own place Business logic in the the model Application logic in the controller View logic in the view 32

33 Event handlers are also a bit different in Monkeybars 33

34 view.my_button.add_action_listener { def action_performed puts action! end } becomes def my_button_action_performed end puts action! 34

35 Monkeybars automatically adds the correct handler object on the target component (as long as you name things correctly) 35

36 So whatʼs so special about all this? 36

37 So whatʼs so special about all this? > The controller doesnʼt hold a reference to the view 37

38 So whatʼs so special about all this? > The controller doesnʼt hold a reference to the view > The model is a plain Ruby (or Java) object you provide yourself 38

39 So whatʼs so special about all this? > The controller doesnʼt hold a reference to the view > The model is a plain Ruby (or Java) object you provide yourself > The need to mock your GUI layer goes away 39

40 So whatʼs so special about all this? > The controller doesnʼt hold a reference to the view > The model is a plain Ruby (or Java) object you provide yourself > The need to mock your GUI layer goes away > You can easily unit test your controller and model Me test gui? 40

41 Hello World (tested) 41

42 Other Monkeybars features > Generators to get you started quickly > Ability to create components and nest them > Easily perform long running tasks without locking up the GUI > Helper methods (window positioning, etc.) 42

43 My Requirements Writable in something higher level than Java Not preventing me from using Java when needed Cross-platform Easy to distribute Securable (no exposed Ruby code) 43

44 Distribution requirements > Builds on any platform > Creates front ends for Windows, OSX and Linux 44

45 Rawr is a library built to address these issues for JRuby projects 45

46 Rawr packaging demo 46

47 Rawr takes care of > Compiling your Java classes > Compiling your Ruby files > Packaging your files into an executable Jar > Creating platform specific front-ends Exeʼs App bundles > Packaging any resource files into data jars 47

48 My Requirements Writable in something higher level than Java Not preventing me from using Java when needed Cross-platform Easy to distribute Securable (no exposed Ruby code) 48

49 JRuby protects your code Do not touch 49

50 File test.rb puts hello world Compile with jrubyc produces hello.class Decompile with jad 50

51 import org.jruby.ruby; import org.jruby.rubyinstanceconfig; import org.jruby.ast.executable.abstractscript; import org.jruby.javasupport.util.runtimehelpers; import org.jruby.runtime.*; import org.jruby.runtime.builtin.irubyobject; import org.jruby.util.bytelist; public class test extends AbstractScript { public test() { $class = Class.forName("test"); filename = "test.rb"; this; callsites = setfunctionalcallsite(new CallSite[1], 0, "puts"); return; } public IRubyObject file (ThreadContext threadcontext, IRubyObject irubyobject, Block block) { Ruby ruby; IRubyObject irubyobject1 = (ruby = threadcontext.getruntime()).getnil(); setposition(threadcontext, 0); return getcallsite(0).call(threadcontext, irubyobject, irubyobject, ruby.newstringshared( 0)); } continued... 51

52 public IRubyObject file (ThreadContext threadcontext, IRubyObject irubyobject, IRubyObject airubyobject[], Block block) { Arity.checkArgumentCount(threadcontext.getRuntime(), airubyobject, 0, 0); return file (threadcontext, irubyobject, block); } public IRubyObject load(threadcontext threadcontext, IRubyObject irubyobject, IRubyObject airubyobject[], Block block) { RuntimeHelpers.preLoad(threadcontext, new String[0]); RuntimeHelpers.postLoad(threadcontext); return file (threadcontext, irubyobject, airubyobject, block); RuntimeHelpers.postLoad(threadcontext); throw ; } continued... 52

53 public static void main(string args[]) { RubyInstanceConfig rubyinstanceconfig; rubyinstanceconfig = new RubyInstanceConfig(); rubyinstanceconfig.setargv(args); Ruby ruby; (new test()).load((ruby = Ruby.newInstance(rubyinstanceconfig)).getCurrentContext(), ruby.gettopself(), IRubyObject.NULL_ARRAY, Block.NULL_BLOCK); } } private static void setposition(threadcontext threadcontext, int i) { threadcontext.setfileandline("test.rb", i); } private final Class $class; private static final ByteList 0 = ByteList.create("hello world"); 53

54 My Requirements Writable in something higher level than Java Not preventing me from using Java when needed Cross-platform Easy to distribute Securable (no exposed Ruby code) 54

55 Monkeybars status > Stable Used in production apps since version 0.5 Current version is > 1.0 > Small but active mailing list > Support on mailing list or on IRC channel > Used in real commercial applications in production now 55

56 A huge thank you goes out to Charlie Nutter and Tom Enebo and anyone who has contributed to JRuby without whom Monkeybars would not be possible 56

57 Visit your local recruiter To build GUI apps in JRuby Any questions? 57

58 David Koontz