This document discusses how to build applications using Groovy and Grails. It highlights that Groovy and Grails can significantly reduce development timelines and costs compared to traditional Java development. It also notes that Groovy and Grails provide good scalability and a shallow learning curve for developers familiar with Java. The document then addresses questions about changes required for existing Java applications and investment and provides guidance on getting started with Groovy and Grails.

1. build your next application in
weeks and not months with
&
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2. What we will cover
• Understand Groovy & Grails
“advantages and differentiators"
• Do we need change a lot?
“if we have already made investments on Java”
• What specific changes?
“can we manage them with ease?”
• Where to start?
“best options to embrace G&G”
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3. Let’s
understand
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4. business
needs
IT drivers
•
•
•
•
•
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Speed / time to market
Total cost of ownership
Scalability
Learning curve
Reuse
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5. natural evolution
Groovy & Grails
application size and complexity
Ruby on Rails
Java / .NET
C/ C++
COBOL
paradigm
era
productivity
era
postmordern
era
complier
era
language
birth
pre 1940
1940
1950
1960
1970
1980
1990
2000
2010
source: http://java.dzone.com/news/new-era-programming-languages
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6. • what is groovy?
• what is grails?
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7. Reduced time to market
traditional development
G&G development
early entry, early sales, more
sales, early feedback, early
improvements
Developer
productivity
Do not repeat
yourself (DRY)
principle
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Convention
over
configuration
Developer
support
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8. Reduced TCO
Smaller DEV
teams
DEV Time =
DEV costs
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Less Rework
Less
Maintenance
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9. Scalability
Think Twitter
• Caching
• Thread support
• Performance and concurrency
source: http://www.slideshare.net/hominhchuc/grailsvsrailsperformance-presentation
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10. Learning curve
Familiarity in
syntax
Lesser coding
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Convention
over
configuration
Documentation
and community
help
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11. Comparison
Java
Reduced time to market
Reduced TCO
Long term scalability
Learning curve
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Ruby on
Rails
Groovy &
Grails









high
low
low
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12. Do I have to
change a lot?
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13. Building blocks
•
•
•
•
•
•
•
•
•
Web servers / App servers
Runtime environments
Database & Hardware
Hosting environment
Scalability needs
Operations team skills
Development team skills
Development process
Maintenance process
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14. Proven to work with
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15. What really changes?
•
•
•
•
•
•
•
•
•
Web servers / App servers
Runtime environments
Database & Hardware
Hosting environment
Scalability needs
Operations team skills
Development team skills
Development process
Maintenance process
Picture source: sintel.org
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16. Development team skills
•
•
•
•
•
•
Groovy as a language
Developer tools
Build tools and deployment tools
Testing
Development process
Integration with external frameworks
Picture source: sintel.org
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17. What are the
changes ?
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18. Groovy as a language
• Shallow learning curve
• Intermixes with Java
• La Java
Picture source: happyemrdoctor.com
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19. Developer tools
• IDEs Eclipse / IntelliJ Idea/
Netbeans
Picture source: techtricksworld.com
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20. Build and …
sources: http://grails.org/Deployment
• Deploy as WAR, EAR
Picture source: contentmarketingup
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21. Testing
•
•
•
•
•
•
•
•
•
Junit
Spock
Easyb
Selenium-RC
Geb
Canoo Webtest
Got yours? Build custom.
Cucumber
Mocks out of the box.
Picture source: competence.co.in
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22. Development process
• Supports agile / iterative delivery process
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23. Integration with external frameworks
• This is a small slide 
• There are around 830 plugins
as of 27th Aug 2012
• Many more in github
• A very strong community
• Spring source supporting grails.
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24. To summarize…
• You don’t have to change your environment
• It can coexist in your java ecosystem
• Framework enabled developer productivity
• Commercial support available as applicable
• Vibrant community support
• Reuse existing proprietary java libraries.
• A plugin for almost all your needs.
• Flat learning for those who are acquainted with the
likes of java.
• Extensive documentation. There are almost all
none of where did I really come from questions 
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25. Where do I
start?
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26. First steps
• Building new modules for existing
applications
• Green field application development
• Leveraging existing proprietary or
open libraries to build new
applications
• Prototyping or POCs
• Rapid Application Development
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27. Dos and Don’ts
•
•
•
•
•
•
•
Controllers
Services
Views
Domain
Testing
Deploy
Process Recommendation
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28. Sustainable with new and disruptive trends
• Social Applications
• Mobile Applications
• Cloud applications
Picture source: thecloudinfographic.com
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29. Get more insights on Groovy and Grails
Download White Paper
Build your next application in weeks and
not months with Groovy and Grails
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