Groovy's history and current status

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GROOVY  son histoire,   son oeuvre Guillaume Laforge @glaforge Restlet — the Web API platform Groovy project team

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We know about APIs!

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From 2003 onward…

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2003

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Bob McWhirter James Strachan

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Bob McWhirter James Strachan James Strachan and Bob McWhirter gave birth to Groovy: a dynamic and agile scripting language for the JVM. […] James always used to say that it was all Bob's fault, but indeed, James had so many groovy ideas that it's hard to believe it's not his own fault. He kept saying: "Wouldn't it be groovy if we could do this and that...". Hence the name "Groovy". That's roughly how it all started.

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7 Groovy pre-1.0 • Closures available since 2003 on Java 1.4+ • All the nice shortcuts already, inspired by Python & Ruby • native syntax for lists, maps, etc… • Tons of useful methods to simplify   common Java boiler-plate code • Initially dynamically-typed only

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I join the project in 2003, patches after patches, become committer, then lead when founders left

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2004

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11 Groovy in 2004 • A brand new parser based on Antlr • after two hand-rolled versions • by John Rose and Jeremy Rainer • Jochen « blackdrag » Theodorou joins the project

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2005

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2006

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17 First paid committer • Jochen becomes the first full-time paid committer • sponsored by BigSky Technologies / No Fluff Just Stuff

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2007

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1.0

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Spock the Enterprise testing framework

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24 Groovy in 2007 — Groovy 1.5 • The long awaited Java 5 update • annotations, enums, generics… • Joint compiler! • Varargs support • Static imports (including import aliasing) • Named parameters without parentheses

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Paul King, #1 committer from 2007 to 2010, and overall #1 committer too!

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2008

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29 Griffon and Easyb

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30 Groovy++ fork! • Not the first fork, but 3rd • by Alex Tkachman (former G2One co-founder) • Big focus on static compilation • interesting playground for our forthcoming static type checking and static compilation support

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2009

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I can honestly say if someone had shown me the Programming Scala book back in 2003, I’d probably have never created Groovy

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Have I had JPA back then, I would certainly not have created Hibernate!

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39 The Groovy Ecosystem grows…

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40 Groovy 1.6 • Performance improvements with call-site caching • Multiple assignments • Optional return in if/else, try/catch, switch/case • More AST transformations • @Singleton, @Lazy, @Immutable, @Delegate • The Grape module system with @Grab • OSGi support

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41 Groovy 1.7 • Nested and inner classes, and nested static classes • Missing annotation definition support • Power Asserts from Spock • Customize the Groovy Truth! • AST viewer and AST builder • SQL support improvements

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2010

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43 Groovy ecosystem marching on… GContracts

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2011

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46 More Groovy ecosystem…

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47 Groovy 1.8 • Command chain expressions • GPars bundled with the Groovy distribution • Primitive calculation optimizations • Closures • as annotation parameters • currying, memoization and tail recursion • Built-in JSON support

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I’m joining the Groovy team!

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2012

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51 Groovy ecosystem continued… • Netflix • Asgard, • Zuul • LinkedIn Glu • GroovyStream

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52 Groovy 2.0 • Static type checking and static compilation • type inference, flow typing… • « Project Coin » enhancements • binary literals, underscore in numbers, multicatch block • Initial « invoke dynamic » support • Modularity of the Groovy code base with modules

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2013

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55 Richer Groovy ecosystem…

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56 Groovy 2.1 • Full « invoke dynamic » support • Type-checking extensions • Meta-annotations • @DelegatesTo annotation • Compiler customization scripts • Distribution bundling GPars 1.0

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57 Groovy 2.2 • Implicit closure coercion to SAM types • Java lambda friendly! • Pre-compiled type checking extensions • @Memoized transformations for methods

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2014

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60 Groovy ecosystem

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61 Groovy 2.3 • Traits! • Improved JDK 8 support • Drastic performance improvement for JSON • New AST transformations & improvements • @Builder,@Sortable,@SourceURI, @BaseScript • New markup template engine • More NIO support

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A look back at the past 6 months

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FIRED!

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MARCH 31st

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MARCH 31st RELEASE GROOVY 2.4 GRAILS 3.0

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66 In Groovy 2.4 also… • Optimized bytecode • Bytecode size reduction • Reduced memory consumption • Traits @SelfType annotation • More handy GDK methods • More AST transformation refinements • Groovysh improvements

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What could possibly go wrong?

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THE CODEHAUS DEMISE

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IMPACT?

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2012 2013 2014 2015 Downloads

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2012 2013 2014 2015 1.7M 3M 4.5M ? Downloads

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2.1 MILLIONS FOR FIRST 4 MONTHS OF 2015

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MAVEN CENTRAL ONLY

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MAVEN CENTRAL ONLY +CODEHAUS LEGACY

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MAVEN CENTRAL ONLY +CODEHAUS LEGACY +BINTRAY

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And now, what’s next?

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MUSICAL CHAIRS

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GRAILS GROOVY CEDRIC GUILLAUME JOCHEN LARI JEFF GRAEME ?

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GRAILS GROOVY CEDRIC GUILLAUME JOCHEN LARI JEFF GRAEME ?

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MESSAGE TO THE COMMUNITY

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HERE TO STAY

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HERE TO STAY INDEPENDENCE

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HERE TO STAY COMMUNITY ABOVE ALL INDEPENDENCE

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APACHE INCUBATOR

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APACHE INCUBATOR MARCH 24TH

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80 Incubation — mentors • Emmanuel Lécharny • Bertrand Delacrétaz • Roman Shaposhnik • Jim Jagielski • Andrew Bayer

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81 Incubation — initial committers • Paul King • Cédric Champeau • Pascal Schumacher • Jochen Theodorou • Guillaume Laforge

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82 Incubation — infrastructure • Mailing-lists created • archived by Nabble • JIRA issues imported • Sources moved to Apache’s Git • with a mirror on Github Please Star it!

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83 Incubation — new committers • Officially joined the project as committer • Andrés Almiray • To be announced soon too! • Dierk König • Russel Winder

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84 Incubation — next steps • The next key step is make a first release! • following the Apache guidelines • Made a first attempt June 7th,   but still some things to tweak to be fully ready!

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Now what?

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86 Groovy 2.4.4 / 2.5 • Improved compiler performance • with an ASM class reader • @Canonical becomes a meta-annotation • More control on the meta-annotation collector • New @MapConstructor transformation • Property validation in transformation parameters • Further AST transformation improvements