Facelets

1
Facelets

• letting go of JavaServer Pages

2
Outline

• Evolution of Web Frameworks
• Facelets
• Overview
• Syntax
• Demo
• AJAX Support
• Scalability/Performance
• Support
• Wrap-up
• Recommended Reading

3
Evolution of Web Frameworks

• Servlets - 1997
• Procedural JSP - 1999
• Composition Frameworks
• Tapestry
• 2000
• Action Frameworks
• Struts
• 2001
• Component Frameworks
• JavaServer Faces
• 2004

4
Facelets Overview

• Composition and Component
• View Handler for JSF
• Throws out JSP

5
Demo

• Hello World and Code

6
Facelets Dependencies

• application root
• WEB-INF
• Classes
• lib
• jsf-facelets.jar
• el-api.jar
• el-ri.jar
• jsf-api.jar
• jsf-impl.jar
• commons-digester.jar
• commons-logging.jar
• commons-collections.jar
• commons-beanutils.jar
• web.xml
• faces-config.xml
• xhtml documents

7
Facelets web.xml

• ltweb-appgt
• lt!-- Use Documents Saved as .xhtml --gt
• ltcontext-paramgt
• ltparam-namegtjavax.faces.DEFAULT_SUFFIXlt/param-na
  megt
• ltparam-valuegt.xhtmllt/param-valuegt
• lt/context-paramgt
• lt!-- Faces Servlet --gt
• ltservletgt
• ltservlet-namegtFaces Servletlt/servlet-namegt
• ltservlet-classgtjavax.faces.webapp.FacesServletlt/
  servlet-classgt
• ltload-on-startupgt1lt/load-on-startupgt
• lt/servletgt
• lt!-- Faces Servlet Mapping --gt
• ltservlet-mappinggt
• ltservlet-namegtFaces Servletlt/servlet-namegt
• lturl-patterngt.jsflt/url-patterngt
• lt/servlet-mappinggt

8
Facelets faces-config.xml

• ltfaces-configgt
• ltapplicationgt
• ltview-handlergt
• com.sun.facelets.FaceletViewHandler
  lt/view-handlergt
• lt/applicationgt
• lt/faces-configgt

9
Facelets Managed Bean

• package com.vallettas.facelets.demo
• public class Login
• private String username
• private String password
• public String getUsername()
• return username
• public void setUsername(String username)
• this.username username
• public String getPassword()
• return password
• public void setPassword(String password)
• this.password password
• public String login()

10
Facelets xhtml Template

• lt!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0
  Transitional//EN" "http//www.w3.org/TR/xhtml1/DTD
  /xhtml1-transitional.dtd"gt
• lthtml xmlns"http//www.w3.org/1999/xhtml"
  xmlnsui"http//java.sun.com/jsf/facelets"gt
• ltheadgt
• lttitlegtFacelets Demolt/titlegt
• ltlink rel"stylesheet" href"style.css"
  type"text/css" /gt
• lt/headgt
• ltbodygt
• ltimg src"images/ldslogo.gif" border"0" /gt
• ltdivgt
• ltuiinsert name"login"gt
• Login goes here
• lt/uiinsertgt
• lt/divgt
• lt/bodygt
• lt/htmlgt

11
Facelets xhtml Composition

• lt!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0
  Transitional//EN" "http//www.w3.org/TR/xhtml1/DTD
  /xhtml1-transitional.dtd"gt
• lthtml xmlns"http//www.w3.org/1999/xhtml"
• xmlnsui"http//java.sun.com/jsf/facelets"
• xmlnsh"http//java.sun.com/jsf/html"
• xmlnsf"http//java.sun.com/jsf/core"gt
• ltbodygt
• ltuicomposition template"/SimpleTemplate.xhtml"gt
• ltuidefine name"title"gt
• lt/uidefinegt
• ltuidefine name"login"gt
• ltfloadBundle basename"com.vallettas.facelets.dem
  o.login" var"msg" /gt
• lthform id"login"gt
• lthpanelGrid columns"2" align"center"gt
• lthoutputText value"msg.username" /gt
• lthinputText value"LoginBean.username" /gt
• lthoutputText value"msg.password" /gt
• lthinputSecret value"LoginBean.password" /gt

12
Ajax Support

• Swim lane approach to Ajax
• Every widget for himself
• JSF Mediation approach
• A widget can affect multiple parts
• Logic stays in Java
• but what about the performance implications of
  reconstituting the JSF tree after every

13
Evolving JavaServer Faces Technology

• Ajax Done Right Slide 21 - 35

Edward Burns Jacob Hookom Adam Winer
14
Scalability/Performance

• Better than JavaServer Pages using JSP
• 5 - 33 faster

15
Support

• Tool Support
• Exadel Studio
• XML/XHTML Support
• Eclipse
• IntelliJ IDEA
• NetBeans
• JBuilder
• JDeveloper

16
Support

• Industry Support
• ?

17
Support

• Technical Support
• https//facelets.dev.java.net
• Google returns 133,000 results its a start
• 1.0 release - Nov 14, 2005

18
Developer Velocity

• Better than JavaServer Pages using JSP
• 30 - 500 faster
• Little to no tool support
• Source for statistics
• Dan Harmer 30-40
• Mike Youngstrom 5x
• Matt Wheeler 2x
• Stephan Heilner 2x
• Monal Daxini 2x
• Me 30-50

19
Recommended Reading

• Articles
• Improving JSF by Dumping JSP - Hans
  Bergstenhttp//www.onjava.com/pub/a/onjava/2004/0
  6/09/jsf.html
• Facelets fits JSF like a glove Richard
  Hightowerhttp//www-128.ibm.com/developerworks/ja
  va/library/j-facelets/
• Inside Facelets Part 1 An Introduction Jacob
  Hookomhttp//www.jsfcentral.com/articles/facelets
  _1.html
• Facelets Developer Documentation Jacob
  Hookomhttps//facelets.dev.java.net/nonav/docs/de
  v/docbook.html