Agile Web Development With Grails

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Slide 1: Agile Web Development with Grails spkr.name = 'Venkat Subramaniam' spkr.company = 'Agile Developer, Inc.' spkr.credentials = %w{Programmer Trainer Author} spkr.blog = 'agiledeveloper.com/blog' spkr.email = 'venkats@agiledeveloper.com' Slide 2: Abstract Agile development is all about developing code and seeking feedback from your users to make sure you're developing what's relevant. When they suggest changes, those must be affordable and reliable. Grails, along with its facility to develop test driven, is a killer combination for rapidly developing web applications. In this ZePo (Zero PowerPoint) presentation, we will take a test driven approach to developing a small but fully functional web application in Grails. We will cover the fundamental features of Grails along with utilizing other capabilities like Ajax. At the end of this presentation, you not only be conﬁdent, but eager to roll your own web application using Grails. Slide 3: Agenda What’s Grails? Functional Testing Principles Phase II Fundamentals Templatizing A Quick App Ajaxing Phase I Conclusion Unit Testing Slide 4: What’s Grails? Open Source Web Framework Inspired by Rails, but not a port Uses Groovy and Java Built for JVM Rapid Development of CRUD Applications But you can leverage Java strengths This presentation based on Grail 0.4 Slide 5: Agenda What’s Grails? Functional Testing Principles Phase II Fundamentals Templatizing A Quick App Ajaxing Phase I Conclusion Unit Testing Slide 6: Grails Principles DRY Convention Over Conﬁguration A bit of a problem when you’re new Once you get used to it, you’re in Paradise Keep it Simple Leverage Java Platform Slide 7: Agenda What’s Grails? Functional Testing Principles Phase II Fundamentals Templatizing A Quick App Ajaxing Phase I Conclusion Unit Testing Slide 8: Grails MVC Grails built on concept of MVC It does not merely recommend that you use MVC It tells you to do so, then follows you home, and sits next to you to make sure you do B R O W S E R Control Model View Slide 9: Agenda What’s Grails? Functional Testing Principles Phase II Fundamentals Templatizing A Quick App Ajaxing Phase I Conclusion Unit Testing Slide 10: Build and Learn A Contacts Application Add name, email, phone, state of residence Edit, list, ... Slide 11: grails Generator Slide 12: Agenda What’s Grails? Functional Testing Principles Phase II Fundamentals Templatizing A Quick App Ajaxing Phase I Conclusion Unit Testing Slide 13: Create App Slide 14: Directory Structure Slide 15: Code Generation Grails script generates quite a bit of stuff for you Mostly html Code is mostly synthesized rather than being generated Slide 16: Three Conﬁgurations Creates three conﬁgurations Production Development Testing Slide 17: Create Domain class Slide 18: Generated Code Slide 19: Editing Domain Class Slide 20: Generating Controller and Views Slide 21: Controller Slide 22: Views Slide 23: A Quick Test Drive Slide 24: A Quick Test Drive... Created New State by clicking on this link Slide 25: Agenda What’s Grails? Functional Testing Principles Phase II Fundamentals Templatizing A Quick App Ajaxing Phase I Conclusion Unit Testing Slide 26: Test Driven Development A way to design an application Helps ﬁnd problems quickly As system evolves, let us know if we meet the expectations Serves as a valuable form of documentation Safety net for refactoring Write Positive, Negative, and Exception tests Slide 27: Test First Domain Logic Slide 28: Code Next Domain Logic Slide 29: After Two More Tests... Slide 30: Agenda What’s Grails? Functional Testing Principles Phase II Fundamentals Templatizing A Quick App Ajaxing Phase I Conclusion Unit Testing Slide 31: Integration Testing Functional Testing or Integration Testing is automated testing of functionality Very helpful when done in addition to unit testing Grails uses Canoo for this Slide 32: Generate Web Test Slide 33: Generated Web Test Slide 34: Running Generated Tests Slide 35: Viewing Test Results Slide 36: Agenda What’s Grails? Functional Testing Principles Phase II Fundamentals Templatizing A Quick App Ajaxing Phase I Conclusion Unit Testing Slide 37: Building Second Domain Class We will continue to build the next Domain class— Person Steps similar to what we’ve done earlier Create Domain Class Generate Controller and Views Slide 38: Person Class Slide 39: Test Driving Where’s our State? Was in the in-memory database Missing State won’t give conﬁdence to our customer Slide 40: Bootstrap Data Slide 41: Revisit Create Person ??? Slide 42: A Quick Fix Add optionValue element to the select in create.gsp Slide 43: Agenda What’s Grails? Functional Testing Principles Phase II Fundamentals Templatizing A Quick App Ajaxing Phase I Conclusion Unit Testing Slide 44: Templates Reusable fragments File naming convention starts with _ You can render as a bean or collection bean results in one expansion collection results in one expansion per element of collection Slide 45: Templates Slide 46: Agenda What’s Grails? Functional Testing Principles Phase II Fundamentals Templatizing A Quick App Ajaxing Phase I Conclusion Unit Testing Slide 47: Ajaxing Frameworks Very easy to integrate with Ajax frameworks Ships with Prototype You may use other frameworks as well Slide 48: Ajaxing Create Slide 49: Ajaxing Create... Slide 50: Ajaxing Create... Slide 51: Ajaxing Create... Slide 52: Agenda What’s Grails? Functional Testing Principles Phase II Fundamentals Templatizing A Quick App Ajaxing Phase I Conclusion Unit Testing Slide 53: Quiz Time Slide 54: References http://grails.codehaus.org http://grails.codehaus.org/Download http://groovy.codehaus.org http://groovy.codehaus.org/Download http://aboutgroovy.com Slide 55: Thank You! http://www.agiledeveloper.com — download