Architecting JSF Based Web Applications for the Real World...

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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Building JSF ApplicationsArchitecting JSF Based Web Applications for the Real World

Bill DudneyObject Systems Groupbdudney@mac.com

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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AgendaJSF Overview

Patterns & Architecture of JSFJSF Request/Response LifecycleComponents

Separation of ConcernsJSF User InterfaceServicesConnecting

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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What Is JSF?Standard Web Application Framework

Defines the Programming ModelReusable ComponentsBuilds HTML from ComponentsValidation & ConversionComponent Tree

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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Goals of JSFEase/Simplify DevelopmentSupport from/by toolsEvents easily tied to server side codeEase of extensionManage UI state

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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AgendaJSF Overview

Patterns & Architecture of JSFJSF Request/Response LifecycleComponents

Separation of ConcernsJSF User InterfaceServicesConnecting

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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Patterns & Architecture of JSFModel-View-ControllerComposite Component TreeServer Side Events

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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Standard MVCMajor Benefits

Separation of ConcernsLoose coupling

Won’t work on the webBrowsers don’t listen to server eventsWhat objects would observe models?

So what to do to get the benifits?

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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Enter JSF Web MVC

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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JSF Provides Web MVCController

FacesServletLifeCycleApplicationNavaigationHandlerActionListenerConversion and Validation

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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JSF Provides Web MVCView

RenderKitRenderers

ModelJavaBeansEJB’s

Extension PointsView & Controller are extensible

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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Typical Implementation

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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Composite Component TreeClient view is simple

Whole tree looks like one

ImplementationSimplified

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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Server Side EventsEvents are cued & consumed server side

Typically from user actions (button clicks, etc.)

Possible to add programatically

Observer Pattern

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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AgendaJSF Overview

Patterns & Architecture of JSFJSF Request/Response LifecycleComponents

Separation of ConcernsJSF User InterfaceServicesConnecting

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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JSF Request/Response LifecycleRestore ViewApply Request ValuesProcess ValidationsUpdate Model ValuesInvoke ApplicationRender Response

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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AgendaJSF Overview

Patterns & Architecture of JSFJSF Request/Response LifecycleComponents

Separation of ConcernsJSF User InterfaceServicesConnecting

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

Bill Dudney — Building JSF Applications Page 17

UIComponentHub of the frameworkTypically Delegate

RenderingValidatingConverting

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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AgendaJSF Overview

Patterns & Architecture of JSFJSF Request/Response LifecycleComponents

Separation of ConcernsJSF User InterfaceServicesConnecting

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

Bill Dudney — Building JSF Applications Page 19

Running Example

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UIComponent Instances

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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Implementation

Colorado Software Summit: October 24 – 29, 2004 © Copyright 2004, Object Systems Group

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To the Code!