Groovy presentation at Google

[Owen Densmore]

The project manager of the Groovy agile language made a presentation  
at Google recently.
   http://tinyurl.com/2x5h3y
Note that the audio has difficulty for a few minutes after the talk  
gets started, but it corrects within a couple of minutes.

Two notes:

- Its fascinating to see just how completely Groovy integrates with,  
yet expands vanilla Java.  It can add methods to existing java  
classes, allowing things like 1.hourFromNow (mashing up Integer and  
Date) and expanding Google services without subclassing.

- Similarly, its surprising to see just how wide the knowledge of a  
modern developer is!  Not just GUIs and language and standard  
libraries, but web services, REST (Flikr and Google Maps), XML, Chat/
Jabber, Geo Services, ... wow!

.. this all showed me just how important the Java integration and  
*modification* capability is.  I believe the other agile systems have  
similar flexibility, so its definitely a brave new world out there.

> Hi,
>
> On Monday afternoon, I gave a presentation of Groovy at Google, in  
> Moutain View.
> A special presentation for Googlers.
> Among the crowd, there were guys like C?dric Beust, Crazy Bob Lee,
> Guido Van Rossum (Python inventor), Josh Bloch, etc...
> Amazing :-)
>
> You can already find the video here:
> <a href="http://video.google.com/videoplay?docid=7928622601123523881&q=type%">http://video.google.com/videoplay?docid=7928622601123523881&q=type% 
> 3Agoogle+engEDU
>
> --
> Guillaume Laforge
> Groovy Project Manager
> http://glaforge.free.fr/blog/groovy

     -- Owen

[Marcus G. Daniels]

Owen Densmore wrote:
> - Its fascinating to see just how completely Groovy integrates with,  
> yet expands vanilla Java.  It can add methods to existing java  
> classes, allowing things like 1.hourFromNow (mashing up Integer and  
> Date) and expanding Google services without subclassing.
>  
Kawa's been integrating Java libraries to a dynamic (and functional)
programming language since the late 1990s

   http://www.gnu.org/software/kawa

Also, in the interest of balanced coverage:

 
http://blogs.msdn.com/hugunin/archive/2007/04/30/a-dynamic-language-runtime-dlr.aspx

[Marcus G. Daniels]

Owen Densmore wrote:
> . this all showed me just how important the Java integration and  
> *modification* capability is.  I believe the other agile systems have  
> similar flexibility, so its definitely a brave new world out there.
>  
Btw, the ABM toolkit Swarm, being based on Objective C (which uses
dynamic binding of messages to methods) has no trouble providing Java
with completely dynamic messaging (in the example below, `forEach').  
Note that ObjectInterface is not conformed-to by Object[12].  

import swarm.Globals;
import swarm.Selector;
import swarm.collections.ListImpl;
import swarm.collections.List;

class Object1 {
    public void ping () {
      System.out.println ("object 1");
    }
}

class Object2 {
    public void ping () {
      System.out.println ("object 2");
    }
}

interface ObjectInterface {
    public void ping ();
}

public class TestSelector
{
    public static void main (String[] args) {
      Globals.env.initSwarm ("selector", "0.0", "marcus at snoutfarm.com",
args);

      List l = new ListImpl (Globals.env.globalZone);

      l.addLast (new Object1 ());
      l.addLast (new Object2 ());
     
      Selector sel = null;

      try {
        sel = new Selector (ObjectInterface.class, "ping", false);
      } catch (Exception e) {
        System.out.println ("Can't find selector");
      }

      l.forEach (sel);
    }
}