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GroovyDevCon #3

So far, we've held two Groovy Developer Conferences: one in London in November 2004, and one in Paris in November 2005. With the late releases of RC-1 and 1.0, the third instance will take place in 2007. The goal of this page is to work on the dates, the place, and the goals and topics of the next session.


With Groovy 1.0 released, it'll be time to focus on the JSR-241 and decide of the roadmap of Groovy 2.0

Please suggest the various topics you'd wish to speak about or features you'd like to have in Groovy 2.0:

  • Make 1.5 the default target JVM for Groovy 2.0
  • decide numbering and branching scheme
  • full annotation support
  • enum support
  • tooling (groovydoc, IDE plugins, improved console, etc)
  • syntax for operator overloading
  • a pass by ref keyword for implementing swap(ref x, ref y) (exists in multiple languages like C#)
  • multiple assignment: a, b = foo() (if a 2-element list is returned for instance)
  • class-scoped use directive
  • new mechanism for DGM and possible syntax for extension methods
  • rework the build system (Gant, Ivy, m2)
  • update dependencies (antlr->3, asm->3, ant->1.7, xerces->2.9, junit->4.2, ...)
  • remove unneeded dependencies from the distributions
  • modularize the groovy jars (groovy-core, groovy-gdk, and embed asm & antlr by defauly in groovy-core)
  • add jsr-223 Groovy engine in the distribution
  • commons-cli or JOpt Simple ...
  • coding style issues, e.g. TODOs, javadoc or groovydoc, metrics
  • cleaning up the codebase (what can be removed, e.g. old eclipse plugin)
  • add more unit tests and coverage report
  • split the tests to create tests for the TCK, tests for the error messages checking, (non)compilation tests, GDK vs language tests, etc
  • set a policy for keeping 1.0 compatibility
  • move non core classes (AntBuilder, Mock...) out of main source tree and cut down jar dependancies
  • performance improvement (run time and compiler performance)
  • Adding new features to make Meta-programming easier (Extensible MetaClass), for instance: myString.metaClass.threeTimes = {} and myString.metaClass.someProp = 3
  • include a native launcher
  • give the status and setup a roadmap for the JSR
  • store source date in the class itself? (comments, closure code which can be used for special serialization or AST operations during runtime)
  • ...


The Groovy Developer Conference #3 will be held in Paris.

Sun will provide us with a big room named "Jupiter" with video-projector and so on.
You can find the details for going to the Sun's offices there.


The conference will take place on 29 and 30 January 2007

(Other possible matching dates were 1-2 and 8-9 February 2007. The sooner, the better.)

The conference is a two days conference. All Groovy & Grails developers are welcome to this conference, and if space permits, we can potentially accept additional invitees.

Availabilities and interested persons 




Prefered location


Guillaume Laforge

any day in january and february



I can organize the event in Paris like last year.
I'm fine with a 2-day event which takes place during the week, but we could also take a day from the week-end, but preferably, the conference should happen at the start or end of the week.

Guillaume Alleon

any day in january and february

weeks starting 22nd of January and 10th of February

Paris, Toulouse

I can organize the event in Toulouse during week time.

Jeremy Rayner

any day in january and february

Feb 14


I can organize the event in London, as I did in 2004 (smile) .

Paul King

probably can't do Europe without some financial travel assistance


Australia: Brisbane, Gold Coast, possibly Sydney

... a long shot ... but thought I would at least propose a down under alternative: Great weather, great food and drink, great beaches (smile)

Jochen Theodorou

any day in january/february


London, Paris, Toulouse, nearly anywhere

I would have offered Stuttgart, but it is a boring city. If you all decide to still go there, then I will do the organization

 John Wilson

 15th Jan to 9th Feb but not 25th Jan.  Then 19th 28th Feb

1st to 15th Jan, 25th Jan, 10th to 18th Feb 

Burssels or Antwerp for the Beer (smile)


Dierk König

any except:

1. - 7. Jan, 15th Jan, 22. - 26. Jan



 Graeme Rocher

If in Paris not sure yet. If in London any except:

 15-19 Jan,5-6 Feb,13-23 Feb


I can make the arrangements for the the location (room with whiteboards, projector etc.), lunch and may be able to provide some assistance (TBC) 

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