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The current version of griffon-jython-plugin is 0.23

To install just issue the following command:

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griffon install-plugin jython



Code Block

from org.codehaus.griffon import IGreeter

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

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

Where IGreeter is an interface allowing Jython to expose methods:

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package org.codehaus.griffon

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

This will generate a Java class named griffon.JythonGreeter, which can be used inside any Griffon artifact, for example a Controller

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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 {
                     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)

You are also able to load Jython scripts at any time. By default all scripts placed at $basedir/griffon-app/resources/jython will be loaded when the application boostraps itself. For example griffon-app/resources/jython/ might look like this:

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

With that code in place, the addNumbers function may be executed as a method call on a dynamic property named py from a Griffon controller. See below:

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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)

The dynamic property will be named py by default. The name of the property may be set explicitly in griffon-app/conf/Config.groovy by assigning a value to the griffon.jython.dynamicPropertyName property.

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griffon.jython.dynamicPropertyName = 'jythonPropertyName'

For most applications, the default name of py should be fine. You can also alter in which artifacts the property gets injected, by default only controllers will have that property. See griffon-app/conf/Config.groovy and look for the following entry

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griffon.jython.injectInto = ["controller"]


Maintained on GitHub at the griffon-jython plugin repository.





0.303-12-12Griffon 0.9.5+ compatibility



Griffon 0.9.2 + compatibility



Initial release