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![System.out.println("Hello, // optional semicolon
World!"); // System.out, brackets,
println 'Hello, World!' // main(), class defn
// dynamic typing
def name = 'Luke' // GString
println "$name, I am your father."
String yodaSays = """${name}, your // multi-line string
father he is.""" // with static typing
// BigDecimal equals()
assert 0.5 == 1/2
def printSize(obj) { // optional duck typing
print obj?.size() // safe dereferencing
} // native list syntax
def letters = ['a', 'b', 'c'] // closure support
letters.each { letter -> // overload '<' on String
// or: for (pet in pets)
assert letter < 'd'
}](https://image.slidesharecdn.com/philipstehlikattechtalks-ph-introtogroovyandgrails-120719125708-phpapp01/75/Philip-Stehlik-at-TechTalks-ph-Intro-to-Groovy-and-Grails-10-2048.jpg)
![Running .groovy files
• from command line groovy [file name]
• compile and distribute as JAR/WAR
• groovyConsole
• online http://groovyconsole.appspot.com/
• groovy sh](https://image.slidesharecdn.com/philipstehlikattechtalks-ph-introtogroovyandgrails-120719125708-phpapp01/75/Philip-Stehlik-at-TechTalks-ph-Intro-to-Groovy-and-Grails-12-2048.jpg)
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Philip Stehlik at TechTalks.ph - Intro to Groovy and Grails
- 1. INTRODUCTION TO GROOVY ANDGRAILS AT TAULIA 2012-07-11 for TechTalks.ph Philip Stehlik
- 2. About • Entrepreneur livingin San Francisco • Co-Founder and CTO Taulia • Coding since teenage years (PHP, Objective- C, ABAP, JS, Java, Groovy) • Taulia serving Fortune 2000 companies with financial software (SaaS + Add-On for SAP) • Engineering team of ~20 people • Almost everything in Groovy
- 3. Taulia's tech stack • Groovy and Grails from day 1 (Grails 1.0) • Completely in the cloud • Integrating with many outside systems • Partners (e-invoicing, orders, payment details, ...) • Web Services • Interfacing with 'Legacy' technologies • Gradle, Spring, Hibernate, Jersey, Maven, ...
- 4. How to interactwith our systems • Browser • REST • SOAP • XMLRPC • File exchange (FTP(S), AS2, SSH) • Lots of data munching and transformation
- 5. Kinds of data • Invoices, Payment history, Orders • Vendor data – address, social security, tax ID • Messages, logins, users • Logs • Complete history of 2 yrs of our customers upon project launch
- 7. Why we likeGroovy • Simple, nice language • Dynamic features (for builders, testing, ...) • Closures • Tight and easy integration possibilities with Java • Open source (Apache 2 license) • Grails
- 8. Groovy • Started developmentin 2003 • Groovy 1.0 January 2, 2007 • Dynamic language for the Java Virtual Machine
- 9. Groovy • Almost allvalid Java code is valid Groovy code • Mostly dynamic typing (static typing since 2.0 in core) • Closures • DSLs and builders • Object oriented • Also 'scripting language'
- 10. System.out.println("Hello, // optional semicolon World!"); // System.out, brackets, println 'Hello, World!' // main(), class defn // dynamic typing def name = 'Luke' // GString println "$name, I am your father." String yodaSays = """${name}, your // multi-line string father he is.""" // with static typing // BigDecimal equals() assert 0.5 == 1/2 def printSize(obj) { // optional duck typing print obj?.size() // safe dereferencing } // native list syntax def letters = ['a', 'b', 'c'] // closure support letters.each { letter -> // overload '<' on String // or: for (pet in pets) assert letter < 'd' }
- 11. Java for(int x =0; x < 20; x++){ System.out.println("counter is: " + x ); } Groovy 20.times { println "counter is: ${it}" }
- 12. Running .groovy files • from command line groovy [file name] • compile and distribute as JAR/WAR • groovyConsole • online http://groovyconsole.appspot.com/ • groovy sh
- 13.
- 15. Grails • High productivityweb development framework • First version in 2006 (1.0 in 2008) • Version 2.1 recently released • Open source (Apache 2 license) • Supported by SpringSource (VMware)
- 16. Grails • Spring, Hibernate,Groovy • MVC • GroovyServerPages • Convention over configuration • Plugin system o MongoDB, Redis o Jquery, Mootols, Bootstrap, BlueprintCSS o Quartz, Apache Shiro, GoogleAppEngine o ...
- 17.
- 18. Additional info • IDE o IntelliJ o STS (SpringSource Tool Suite) o Eclipse plugin • Other prominent users o Netflix (Just released Asgard) o Sky.com o wired.com o ...
- 19.
- 20. Taulia Architecture • Everythingrunning on AWS • Multiple zones and regions • Tomcat • Apache • HAProxy • MySQL, MongoDB, S3 • All traffic and business data encrypted with at least AES256 • Multiple Grails apps, Servlets, jobs
- 21. Idea to Deployment • One-Pager • Product team: o Product Manager o Engineer o Quality Engineer Meeting at least weekly with everybody involved to gauge progress. • Paper prototyping, interviews, refining • Everybody involved from the beginning
- 22. Idea to Deployment#2 • Developer codes locally • All tests on each commit (Jenkins) • Auto deploys to integration environment (also publicly accessible for feedback and demos) • QE and product feedback • Iterate • Two week sprints – deploy to public QA and PRD • Using sleeping features
- 23. Thanks! Say hi whenyou are in San Francisco! p@pstehlik.com @pstehlik http://pstehlik.com