griffon install-plugin jython

from org.codehaus.griffon import IGreeter

class JythonGreeter(IGreeter):
    def __init__(self):
        pass

    def greet(self, who, model):
        greeting = 'Hello %s from Jython!' % str(who)
        print greeting
        model.setOutput(greeting)

package org.codehaus.griffon

public interface IGreeter {
    public void greet(String greetee, MyModel model)
}

import javax.swing.JOptionPane
import java.beans.PropertyChangeListener
import org.codehaus.griffon.IGreeter
import griffon.jython.JythonObjectFactory

class JyAppController {
    def model
    def view
    def greeter

    def mvcGroupInit(Map args) {
         model.addPropertyChangeListener("output", { evt ->
             if(!evt.newValue) return
             // model.output may have been updated outside EDT
             doLater {
                 JOptionPane.showMessageDialog(app.windowManager.windows[0],
                     evt.newValue, "Yay for Jython", JOptionPane.INFORMATION_MESSAGE)
             }
         } as PropertyChangeListener)

         // Create our JythonGreeter
         JythonObjectFactory factory = new JythonObjectFactory(IGreeter.class, 'JythonGreeter', 'JythonGreeter')
         greeter = (IGreeter) factory.createObject()
     }

    def handleClick = { evt = null ->
        if(!model.input) return
        // clear the result first
        model.output = ""
        // invoke Jython class outside the EDT
        doOutside {
            greeter.greet(model.input, model)
        }
    }
}

def addNumbers(a, b):
    return a + b

class FooController {
  def addNumbers = { evt = null ->
     // invoke the function as a method on the 'py' dynamic property
     model.z = py.add_numbers(model.x, model.y)
  }
}

griffon.jython.dynamicPropertyName = 'jythonPropertyName'

griffon.jython.injectInto = ["controller"]