Add ruby interop

build.gradle

@@ -8,7 +8,7 @@ buildscript {
 apply plugin: 'com.github.jruby-gradle.base'
 import com.github.jrubygradle.JRubyExec
 
-defaultTasks 'runServer'
+defaultTasks 'runInterop'
 
 /* Disabling the default repositories so we can ues the new (unreleased)
  * default rubygems proxy
@@ -42,6 +42,10 @@ task runDemo(type: JRubyExec) {
     script './demo.rb'
 }
 
+task runInterop(type: JRubyExec) {
+    script './rubyinterop.rb'
+}
+
 task runServer(type: JRubyExec) {
     script './server.rb'
     systemProperties 'java.library.path' : "${buildDir}/native"

rubyinterop.js

@@ -0,0 +1,2 @@
+print(example);
+print(example.callMethod('hello'));

rubyinterop.rb

@@ -0,0 +1,19 @@
+#!/usr/bin/env ruby
+
+require 'java'
+java_import 'javax.script.ScriptEngineManager'
+java_import 'javax.script.ScriptContext'
+
+class Example
+  def hello
+    return 'hello world from Ruby'
+  end
+end
+
+engine = ScriptEngineManager.new.get_engine_by_name('nashorn')
+engine.get_bindings(ScriptContext::ENGINE_SCOPE).put('example', Example.new)
+
+
+puts '-' * 30
+engine.eval(File.open('rubyinterop.js').read)
+puts '-' * 30