![Java:
String[] names = new String[] {"Rod", "Carlos", "Chris"}
for (String it : names)
if (it.length() <= 4)
System.out.println(it);
Groovy:
String[] names = [ "Rod", "Carlos", "Chris" ]
for (String it : names)
if (it.length() <= 4)
System.out.println(it);
Idiomatic Groovy:
names = ["Rod", "Carlos", "Chris"]
names.grep { it.size() <= 4 }.each{ println it }](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Groovy & Grails Dynamic Language for the JVM
- 1. Groovy & Grails Jean Barmash CTO, EnergyScoreCards www.meetup.com/grails
- 2. Java: String[] names = new String[] {"Rod", "Carlos", "Chris"} for (String it : names) if (it.length() <= 4) System.out.println(it); Groovy: String[] names = [ "Rod", "Carlos", "Chris" ] for (String it : names) if (it.length() <= 4) System.out.println(it); Idiomatic Groovy: names = ["Rod", "Carlos", "Chris"] names.grep { it.size() <= 4 }.each{ println it }
- 3. Groovy Language Dynamic Language for the JVM Native Integration with Java, cross-compilation Almost-zero learning curve can rename .java to .groovy Backed by VMWare / SpringSource Open Source, Apache License Unfortunate Name
- 4. Major Features Less Ceremony Closures Native collection syntax / processing Many Features for DSL Abstract Syntax Tree Transformation E.g. @Immutable, @Singleton Trivial XML / HTML / JSON Processing Fun Did I say easy integration with Java?
- 5. Grails (www.grails.org) High Productivity Web Framework Convention over configuration Built on solid Java technologies Spring, Hibernate, Quartz GORM - Works with Hibernate, JPA, and NoSQL Dbs Plugins - 699 plugins & growing (including clojure, scala) IDE Support 2.0 In November Backed by SpringSource / VMWare Awesome Community Unfortunate Name
- 6. Who Uses Groovy / Grails Netflix (Internally) Sky.com LinkedIn Conde Naste (Wired) Example - clickOnero in Latin America 1.5 million users, 80k concurrent users, 8 tomcats, 5 Linux boxes, 1 mysql, 1 terracotta, 1 rabbitmq EnergyScoreCards :-)
- 7. Other Groovy Projects Spock Testing Framework GEB Functional Testing Framework GPARS - Concurrency Framework Gradle - convention over configuration build framework Griffon - Swing Framework Some Other projects that offer Groovy support o Spring, Mule, NanoContainer, ServiceMix, Magnolia CMS, eXo, neo4j, Jenkins, o Many more at http://groovy.codehaus.org/Related +Projects
- 8. References Groovy Home Page http://groovy.codehaus.org/ Related Projects http://groovy.codehaus.org/Related+Projects Blogs - http://groovyblogs.org/ Groovy Magazine - http://www.groovymag.com Grails - www.grails.org Grails Plugins - http://grails.org/plugin/category/all SpringSource - www.springsource.com Groovy / Grails Support http://www.springsource.com/support/groovyandgrailssupport Conferences - Gr8Conf, SpringOne2GX SpringOne2GX - http://www.springone2gx.com/ Gr8Conf - http://www.gr8conf.org/ NYC Groovy/Grails Meetup - http://www.meetup.com/grails/