Overview of JSF 2.0
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JSF 2.0 aims to improve the JavaServer Faces framework by focusing on four main goals: 1) introducing a new page declaration language called Facelets, 2) making custom component development easier, 3) adding support for Ajax interactions, and 4) reducing configuration requirements. Key changes include support for annotations to replace XML configuration, and new tags and APIs to enable Ajax functionality without JavaScript. The specification was developed based on feedback from the JSF community.
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Overview of JSF 2.0
- 1. JavaServer™ Faces 2.0 Overview • Roger Kitain • Enterprise Java Platforms >
- 2. JSF 2.0 – What We Heard • Top Goals 1)Page Declaration Language (PDL) 2)Make custom components much easier to develop 3)Ajax Support 4)Reduce the configuration burden
- 3. Page Declaration Language • Based on Facelets • Facelets: > first non-JSP PDL designed for JSF > Some differences from JSP: > Pages compiled to abstract structure - when executed builds JSF component view > Don't need TLD for tag attributes > Page templating
- 4. Easier component Development <html xmlns=quot;http://www.w3.org/1999/xhtmlquot; xmlns:h=quot;http://java.sun.com/jsf/htmlquot; xmlns:ez=quot;http://java.sun.com/jsf/composite/simpleoutquot;> ... <h1>Yellow Text Example</h1> <h:form id=quot;form1quot;> <ez:out value=quot;Test Valuequot;/> <p><h:commandButton value=quot;reloadquot;/></p> </h:form> </html>
- 5. Easier component Development <html xmlns=quot;http://www.w3.org/1999/xhtmlquot; xmlns:h=quot;http://java.sun.com/jsf/htmlquot; xmlns:composite=quot;http://java.sun.com/jsf/compositequot;> ... <composite:interface name=quot;outquot; displayName=quot;Very Basic Output Componentquot; preferred=quot;truequot;...> <composite:attribute name=quot;valuequot; required=quot;falsequot;/> </composite:interface> <composite:implementation> <h:outputText value=quot;#{compositeComponent.attrs.value}quot; style=quot;background-color: yellowquot;/> </composite:implementation> </body> </html>
- 6. Ajax Support • Resource Delivery Mechanism • Partial View Processing • Partial View Rendering ↑ In JSF 2.0 Spec • Ajaxification Capability • Ajax Enabled Components ↓ In Component Library R
- 7. Ajax Support Partial View Processing Ajax Request execute:4,5 Apply Request Process Restore View Values Validations 1 2 1 Render Invoke Update Model 1 Response Application Values 2 3 4 5 Execute Portion
- 8. Ajax Support Partial View Processing Ajax Request render:4,5 Apply Request Process Restore View Values Validations 1 2 1 Render Invoke Update Model 1 Response Application Values 2 3 4 5 Render Portion
- 9. Ajax Support • JavaScript namespace registered with OpenAjax • JavaScript API for performing Ajax interations with JSF > collecting/encoding view state > sending requests > processing Ajax response and Dom updates
- 10. Ajax Support Ajaxification Capability • A way to give ajax capability to existing JSF components without writing any JavaScript • Specification will define core tag <h:commandButton value=”submit”> <f:ajaxRequest render=”myOutput” /> </h:commandButton> ... <h:outputText id=”myOutput” />
- 11. Reduce Configuration Burden Annotation Support • An alternative to XML configuration • @FacesComponent, @FacesConverter, @ManagedBean • “Scope” Annotations: > @RequestScope, @SessionScope, @ApplicationScope
- 12. Summary • Collected feedback from community and EG members • Defined top goals for specification • Diverse set of EG members