Groovy presentation from the WeCode IL session

1. Why every
Java developer
should know
Groovy language
Victor Trakhtenberg
victortr75@gmail.com @victortr75

2. Personal
My name is Victor

3. Personal
Java.IL community co-founder
http://www.meetup.com/JavaIL/

8. Groovy is very easy to enter
into for Java developers,
since…
Java code is Groovy code

9. Groovy Features
• Strings
• Collections
• Date
• Parsing and producing
JSON
• Working with a DB
• Processing XML
• Template engines
• Builders
• Grapes
• Traits
• Processing
configuration
• HTTPBuilder
• and many more…

10. Groovy is more than just
a set of features,
it is more than a better
Java

11. There are new concepts for
Java developers
• Dynamic language
• with optional static-typing and static-
compilation
• Closures
• Functional programming
• Meta-programming
• Traits
• DSLs
• and more…

13. Prelude - REPL

14. Groovy Collections

16. Map with default

18. Using Groovy in a running Java
project
Our setup: Java Play! Framework project
Choose one concern to use Groovy
Our choice: JSON manipulations

19. Parse JSON

20. Build JSON

21. Case Study: Campaign Configuration
Management

22. The Java interface and
the Groovy implementation

23. Java-to-Groovy Bridge

24. Is it a ‘coupon’ campaign

25. Is it a ‘coupon’ campaign

26. Is it a ‘coupon’ campaign

27. Integrate with Salesforce

28. Update account at Salesforce

29. Integrate with Salesforce - Authenticate

30. Use Groovy for non-production

31. http://jaxenter.com/groovy-is-the-swift-alternative-for-android-107846.html

32. Groovy resources
• http://groovy-lang.org/
• http://glaforge.appspot.com/category/Groovy%20Weekly
• http://www.mrhaki.com/
• https://plus.google.com/communities/105160926044623621768
• http://www.mscharhag.com/2015/02/creating-android-apps-with-
groovy.html
• http://groovy.codehaus.org/modules/http-builder/doc/uribuilder.html
• http://www.drdobbs.com/jvm/why-build-your-java-projects-with-
gradle/240168608?pgno=3
• http://www.infoq.com/presentations/groovy-test-java-spock
• http://www.infoq.com/presentations/testing-spock-geb
• http://melix.github.io/blog/2015/02/who-is-groovy.html
• http://groovy-the-superb-homeless.mally.pl/#/
• https://github.com/victorgit/GroovyPresentation

33. MrHaki – Groovy Goodness
http://mrhaki.blogspot.co.il/2009/09/groovy-goodness-padding-strings.html

34. Images sources
• http://www.clevercuties.com/myimages/products/Computers/IHEARTPROGRAMMING.jpg
• http://blogs.perceptionsystem.com/wp-content/uploads/2013/12/Happy-Customer.jpg
• http://lifepalette.com/wp-content/uploads/2015/01/Productivity.jpg
• http://www.checkaction.com/blog/wp-content/uploads/2014/01/startup-employee-productivity-tips-675x320.jpg
• http://www.akifarslan.com.tr/wp-content/uploads/2013/10/java.jpg
• http://cdn.makeuseof.com/wp-content/uploads/2012/03/jvm.png?84ec63
• http://cdn.slidesharecdn.com/ss_thumbnails/ecosystem-120717081103-phpapp01-thumbnail-4.jpg?cb=1342530724
• http://www.army-armee.forces.gc.ca/assets/ARMY_Internet/images/ceremonial-guard/index-main.jpg
• http://www.local-guru.net/img/guru/have_fun.png
• http://blog.xo.com/wp-content/uploads/2014/03/pic-raised-hands-550x300.png
• https://pbs.twimg.com/media/BVDKBfUCIAAWKw9.jpg
• http://www.nscsd.org/webpages/jenkondrk/imageGallery/Clip%20art/raise%20hand.gif
• http://ubik.cc/MAOW-Firenze-09/images/repl-loop.png
• http://hirportal.sikerado.hu/images/kep/201110/belyeg.jpg
• http://www.slideshare.net/SpringCentral/groovy-in-thelightofjava8
• http://blog.cacoethes.co.uk/groovyandgrails/groovy-in-light-of-java-8
• http://www.infoq.com/articles/groovy-to-Java-8
• https://tedvinke.wordpress.com/2014/06/20/java-8-lambdas-vs-groovy-closures-compactness-grouping-and-summing/
• http://groovy.mn/static/hh97hMrFEv8Xc9j1zvR9winGH86xmHGbiZNKFTORWYl.jpg