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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: jferguson@gopivotal.com twitter: fergusonjohnw Lou Crocker Email: lou@sencha.com web: www.sencha.com