sencha and spring
DESCRIPTION
Speakers: Lou Crocker and John Ferguson Much like Spring burst onto the scene and became a defacto standard for Java, Sencha is vying for a similar role in the world of HTML5. From Ext JS for desktop development, Sencha Touch for mobile, and Sencha Architect as a design tool, it has become a pervasive technology in the new paradigm of multi-client development. In this session we will use our own SpringTrader reference application to illustrate integration techniques of Spring with Sencha. We will go beyond the basic wiring of a REST call with binding results to UI components, and look at mapping the Spring MVC and Sencha MVC architectures, along with other tips and tricks to streamline your mobile application development efforts.TRANSCRIPT
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Sencha and Spring Lou Crocker, Sencha & John Ferguson, Pivotal
S P R I N G I O C O R E : Spring Framework 4.0
Who are these guys?
John Ferguson • Sr. Field Engineer at Pivotal • Formally Enterprise Data and Application Architect • Financial Services background • <3 Music Theater • Enjoys cats and internet memes
Lou Crocker • Senior Sales Engineer • Background in Enterprise Development and Professional
Services
What are we doing here? • Sencha, Ext-JS, Touch, GXT….huh? • Isn’t this a Spring conference? • Building a demo live on stage • Building with Sencha Architect • Wait…did we just create an “app”? • That’s child’s play. Show me a real application
Developers
Current problem
End Users
Consumers are demanding a universal app experience
Developers are facing challenges building universal apps
• Same app functionality everywhere • Experiences tailored for desktop,
mobile and tablet
• Apps need to run everywhere • Apps need to be managed on
disparate platforms
Too many application platforms!
The Sencha Mission
Rapid and easy development of rich web apps for the
broadest range of access devices from IE6 to the latest
table.
Frameworks
Sencha Touch
Sencha Ext JS
Sencha GXT
Sencha Ext JS
• MVC architecture • Robust data APIs • Modern themes • Rich UI widgets • Plugin-free charting • Big data grids • Cross platform browser
compatibility
Sencha Touch
• High performance mobile application framework
• Cross platform apps • Themes for each platform • Smooth scrolling and
animations • Multi-touch gestures • Adaptive layouts
• Visual app builder for desktop and mobileGenerate live interfacesBuild UI and code fully featured apps directly in ArchitectConnect to backends easilyBest practices generated code
Sencha Architect
Aren’t we at a Spring conference? The “I Wear Too Many Hats at My Company” Syndrome
• Developers have many jobs to do • There isn’t always a “UI” developer • Spring developers are expected to build
Mobile Apps • Sencha and Spring seamless integration –
logical connectivity
Can we just agree? • REST is how mobile apps
communicate with backends • Lightweight • Easy to use • Facilitates data binding in
Sencha Touch
Quick Hyper Primer How do we build REST in Spring MVC servlet-context.xml
<mvc:annotation-driven />
Controller @Controller public class MyController {
@RequestMapping(value=“/resource/{id}”, method=RequestMethod.GET) public @RequestBody MyResource getResource(@PathVariable(“id”) int id){ return dataSource.get(id); }
}
How REST-y do we we need to be?
* This slide is shamelessly stolen from Josh Long @starbuxman
http://martinfowler.com/articles/richardsonMaturityModel.html
The Richardson Maturity Model is a way to grade your API according to the REST constraints with 4 levels of increasing compliance
What do we need?
• Need resources so we can map back to UI domain
• Need Verbs so we can use GET/POST/PUT/DELETE consistently
• Hypermedia Controls / HATEOAS not important today but Sencha can take advantage of in future
Wait… Hatie Oh Ah Es? HATEOAS: Hypermedia As The Engine Of Application State
• Uniform interface • Rels in Links provide standard
access to related resources
http://www.youtube.com/watch?v=SC0FPuDKei0
Better explanation:
Quick Hyper Primer How do we build REST in Spring MVC servlet-context.xml
<mvc:annotation-driven />
Controller @Controller public class MyController {
@RequestMapping(value=“/resource/{id}”, method=RequestMethod.GET) public @RequestBody MyResource getResource(@PathVariable(“id”) int id){ return dataSource.get(id); }
}
Level 1: Resources
Level 2: HTTP Verbs
Some things to think about… • Models Matter
– Mobile clients need to know how the objects are returned • REST consistency matters
– Can’t change the URL’s willy-nilly • Thinner objects are better than monothlic
– Many times you are sending data over mobile network • JSONP is your friend for development
D E M O
Spring Twitter Search • Spring REST back end • Query will return last 10 tweets to match • Wrap it in JSONP to enable cross-site json • Sencha Touch front-end • What is this Spring 2012? A twitter app? You bet!
Building a Spring Twitter backend
Or do they….
Add a little Spring Social
..and we have data!
Building a Twitter search app • Let’s begin with Architect • The project structure • Add the container • Add the view • Create the Model • Create the store • Bind the view
Access static electricity resource in Spring
Combine the pieces … and deploy! • Test the data in the design environment • Create the display template • Create the preview path • Preview the app • Set the build path • Build the app • Modify template/theme/parameters and repeat
Let’s start trending!
http://ssawesome123.cfapps.io/app.html
Tweet with hashtag:
#ssawesome
Spring Trader • Reference Architecture for Pivotal and Spring • Inspired by IBM “Day Trader” • Uses Spring MVC to expose REST endpoints
– Level 2: HTTP verbs • Sencha Touch front end
http://springtrader.gopivotal.com/spring-nanotrader-sencha/
https://github.com/vFabric/springtrader/tree/sencha-mobile Github:
Live Application:
Spring Trader Architecture
Spring Trader Architecture
Keeping up with us
John Ferguson Email: [email protected] twitter: fergusonjohnw Lou Crocker Email: [email protected] web: www.sencha.com
