seminar.2008.jsf.seam

Copyright AlphaCSP Israel 2008 – Web Framework Playoff Seminar

2

Java Server Facesadopting the standard

Roi Aldaag

Consultant, AlphaCSP


3

Agenda

Introduction

Architecture

Configuration

Features

Pros & Cons


4

Introduction

Not so long ago, if you “Googled“

the word JSF, you probably would

have come across …


5

Introduction

The F-35 Joint Strike Fighter (JSF) …


6

Introduction

Today you’d find…

JavaServer Faces Technology


7

Introduction :: What is JSF?

What is JSF ?

Specification

UI framework

Component based

Server side

Java web applications


8

Introduction :: Motivation

9 Billion Reasons for JSF…


9


JCP Standard

JSF 1.0/1.1 JSR 127 May 2005

JSF 1.2 JSR 252 May 2006

JSF 2.0 JSR 314 Q4 2008 ?

/ JEE6


10


Vendor adoption JSF RI

MyFaces


11


Popularity Commercial Projects

Open Source Projects

Market

Documentation

http://www.amazon.com/Mastering-JavaServer-Faces-Java-Dudney/dp/0471462071/ref=pd_bbs_9/105-1895725-3556420?ie=UTF8&s=books&qid=1193950544&sr=8-9

http://www.amazon.com/JavaServer-Faces-Hans-Bergsten/dp/0596005393/ref=pd_bbs_4/105-1895725-3556420?ie=UTF8&s=books&qid=1193950544&sr=8-4

http://www.amazon.com/Core-JavaServer-TM-Faces-2nd/dp/0131738860/ref=pd_bbs_1/105-1895725-3556420?ie=UTF8&s=books&qid=1193950544&sr=8-1

http://www.amazon.com/JavaServer-Faces-Complete-Reference/dp/0072262400/ref=pd_bbs_2/105-1895725-3556420?ie=UTF8&s=books&qid=1193950544&sr=8-2

http://www.amazon.com/Pro-JSF-Ajax-Building-Components/dp/1590595807/ref=pd_bbs_sr_3/105-1895725-3556420?ie=UTF8&s=books&qid=1193950544&sr=8-3

http://www.amazon.com/JavaServer-Faces-Action-Kito-Mann/dp/1932394125/ref=pd_bbs_5/105-1895725-3556420?ie=UTF8&s=books&qid=1193950544&sr=8-5


12


IDE integration Visual tool support

Drag & Drop

Auto-complete


13


Tools Component Libraries

IceFaces

RichFaces

ADF / Trinidad

Tomahawk

Extensions Facelets

Ajax4Jsf

DinoFaces


14


View Technology JSP / Servlet

Other template engines

Facelets

JSFTemplating

Multiple rendering output from same pages


15

Introduction :: What is Seam?

What is Seam ? A lightweight framework for JEE5

Unifies JSF and EJB models(Web Beans / JSR 299)

Integrates JSF, POJOs, JPA, jBMP, Drools

Annotation / EL based

Extends JSF

JBoss OS (LGPL)

Release at 2006

Current version 2.0.2 SP1


16

Introduction :: What is Seam?

Misconceptions Can be used without EJB3

Does not need a container

Has a small footprint

Easy integration


17

Introduction :: Why JSF+Seam?

Why JSF + Seam? JSF has some weaknesses…

Seam extends and enhances JSF Reduces boilerplate code

Annotations

RESTful URLs

JSF Lifecycle

Contextual state management

Ajax Remoting

Exception Handling

Simple Integration EJB3 / jBMP/ Drools / Spring


18

Introduction :: Seam in action


19

Agenda

Introduction

Architecture

Configuration

Features

Pros & Cons


20

Architecture :: JSF MVC

Front Servlet(FacesServlet)

Controller

Event Listeners &

Action Handlers(ValueChangeListener,

ActionListener)

Config(faces-config.xml)

Events(ValueChangeEvent,

ActionEvent)

ModelView

Component

Model(Java Beans)

Delegates(Convertors,

Validators,

Renderers)

Resources(JSP,

XML,

Properties)

Component

Tree(UIComponent)

Business

Objects(Managed Beans)

Request

Response

UIViewRoot

UIForm

UIInput UIInput

UIPanel

Model

View

Controller


21



Controller

Event Listeners &


ActionListener)



ActionEvent)

ModelView

Component

Model(Java Beans)


Validators,

Renderers)

Resources(JSP,

XML,

Properties)

Component

Tree(UIComponent)

Business


Request

Response

UIViewRoot

UIForm

UIInput UIInput

UIPanel

Model

POJO’s


22


Controller

Event Listeners &


ActionListener)



ActionEvent)

ModelView

Component

Model(Java Beans)


Validators,

Renderers)

Resources(JSP,

XML,

Properties)

Component

Tree(UIComponent)

Business


Request

Response

UIViewRoot

UIForm

UIInput UIInput

UIPanel

Controller

Front Servlet

Configuration

Event Listeners



23



Controller

Event Listeners &


ActionListener)



ActionEvent)

ModelView

Component

Model(Java Beans)


Validators,

Renderers)

Resources(JSP,

XML,

Properties)

Component

Tree(UIComponent)

Business


Request

Response

UIViewRoot

UIForm

UIInput UIInput

UIPanel

View

Component Tree

Component Model

Delegates

Resources


24

UIViewRoot

UIForm

UIInput UIInput

UIPanel

...

<f:view>

<h:form>

<h:panelGrid columns = "2">

<h:inputText/>

<h:inputSecret/>

</panelGrid>

</h:form>

</f:view>

..

HTML

JSP

WML

XML

Architecture :: Component Tree

MarkupComponent TreeJSF tags


25

Architecture :: JSF Lifecycle

JSF Lifecycle1. Restore view

2. Apply request values

3. Process validations

4. Update model values

5. Invoke application

6. Render response

Restore View

Apply Request

Values

Process Validation

Update Model

Values

Invoke Appilcation

Render Response

Request

Response


26

Architecture :: Seam Lifecycle

Seam Lifecycle1. Restore view

2. Restore Conversation

3. Apply Page Parameters

4. Apply request values

5. Process validations

6. Update model values

7. Invoke application

8. Process Selection

9. Store Conversation

10. Render response

Restore View

Apply Request

Values

Process Validation

Update Model

Values

Invoke Appilcation

Render Response

Request

Response

Store Conversation

Invoke Page Action

Process Data Model

Selection

Apply Page

Parameters

Restore

Conversation


27

Architecture :: Seam Concepts

Seam Concepts1. Three Tier

2. POJOs and annotations

3. IoC and bijection

4. Contextual state management

5. Interceptors


28

Agenda

Introduction

Architecture

Configuration

Features

Pros & Cons


29

Configuration :: JSF

faces-config.xml


30

Configuration :: Seam

faces-config.xml


31

Configuration :: JSF

web.xml


32

Configuration :: Seam

web.xml


33

Agenda

Introduction

Architecture

Configuration

Features

Pros & Cons


34

Features :: Demo JSF Project

LoginBean.java MasterDetailBean.java

jsfLogin.jsp jsfMasterDetail.jsp

faces-config.xmlweb.xml

/webproj

src

WebRoot

WEB-INF

managed

XML

XMLJSP

JSP


35

Features :: Demo Seam Project

LoginBean.java MasterDetailBean.java


faces-config.xmlweb.xml

/webproj

src

WebRoot

WEB-INF

managed

lib

classes

XML

XML

JSP

JSP

seam.properties

jboss-seam.jar

jboss-seam-ui.jar

components.xml


36

Features :: Demo Login page

jsfLogin.jsp

UIViewRoot

UIPanel

UIOutput

UIPanel

UIInput

UIForm

UIOutput

UIInput

UICommand

UIPanel


37

LoginBean.java

Features :: JSF Value Binding

jsfLogin.jsp

faces-config.xml

Unified EL

Managed Bean


38

LoginBean.java

Features :: JSF Method Binding

jsfLogin.jsp

Invoke Application

Phase


39

Features :: JSF State Management


User

Dependency Injection


40

Features :: Seam State Management

Contextual state management Bijection

@In - Injection

@Out – Outjection

Dynamic, contextual, bidirectional

Context Scope Event < Page < Conversation <

Business Process < Session < Application

Conversation Temporary conversation

Long-running conversation

ConversationId


41

Features :: Seam State Management

MasterDetailBean.java


42

LoginBean.java

Features :: JSF Page Flow


faces-config.xml


43

Features :: Seam Page Flow

Page Actions HTTP GET

Bookmarking

RESTful URLs

HTTP POST

HTTP GET


44

Features :: Seam Page Flow

Page Flow JBoss Business Process Management (jBPM)

Used to define process workflow / page flow

Define transition between pages

Define navigation rules for each page

Flow is based on events and conditions

Back button In conversation mode, back button is disallowed

Undefined transition

Seam blocks actions from “stale” pages

Redirects to relevant page

<<Start State>>

start

<<Page>>

login

<<Decision>>

User

authenticated ?

<<Page>>

contacts

true

<<End State>>

end

false


45

Features :: JSF Validations


jsfMasterDetail.jsp


46

Features :: Seam Validations

jsfMasterDetail.jsp


@org.hibernate.validator.Email


47

Features :: JSF Error Handling

javax.servlet.ServletException: javax/servlet/jsp/tagext/JspIdConsumer


48

Features :: Seam Error Handling


49

Features :: Seam Error Handling

Exception Annotations


50

Features :: Demo MasterDetail page

jsfMasterDetail.jsp



51

Features :: Demo MasterDetail page

jsfMasterDetail.jsp - continued

HtmlDataTable

HtmlColumn HtmlColumn

HtmlOutputText HtmlOutputText


52

Features :: JSF Ajax

Ajax: Page Wide Page wide support (region, zone)‏

Add support to existing components

Sub view processing

Partial tree rendering

Normal lifecycle

Partial page refresh

Example:

Ajax4Jsf, Dynamic Faces


53

Features :: JSF Ajax

Ajax: Component Wide Ajaxified components

Client validations

Client component interaction

Custom lifecycle

Example: RichFaces, IceFaces, ADF (Trinidad)‏


54

Features :: Seam Ajax

Ajax Remoting Similar to DWR Access seam components from JS JavaScript APIs

Seam.Component Seam.Remote

Expose server side components @WebRemote

Compatible with Ajax4Jsf Dojo / GWT integration


55

Features :: Documentation

JSF Specification

Forums

Books

Seam Reference

Forums

Books

http://www.amazon.com/Mastering-JavaServer-Faces-Java-Dudney/dp/0471462071/ref=pd_bbs_9/105-1895725-3556420?ie=UTF8&s=books&qid=1193950544&sr=8-9

http://www.amazon.com/JavaServer-Faces-Hans-Bergsten/dp/0596005393/ref=pd_bbs_4/105-1895725-3556420?ie=UTF8&s=books&qid=1193950544&sr=8-4

http://www.amazon.com/Core-JavaServer-TM-Faces-2nd/dp/0131738860/ref=pd_bbs_1/105-1895725-3556420?ie=UTF8&s=books&qid=1193950544&sr=8-1

http://www.amazon.com/JavaServer-Faces-Complete-Reference/dp/0072262400/ref=pd_bbs_2/105-1895725-3556420?ie=UTF8&s=books&qid=1193950544&sr=8-2

http://www.amazon.com/Pro-JSF-Ajax-Building-Components/dp/1590595807/ref=pd_bbs_sr_3/105-1895725-3556420?ie=UTF8&s=books&qid=1193950544&sr=8-3

http://www.amazon.com/JavaServer-Faces-Action-Kito-Mann/dp/1932394125/ref=pd_bbs_5/105-1895725-3556420?ie=UTF8&s=books&qid=1193950544&sr=8-5

http://www.amazon.com/JBoss-Seam-Simplicity-Beyond-Prentice/dp/0131347969/ref=pd_bbs_sr_1?ie=UTF8&s=books&qid=1213568813&sr=8-1

http://www.amazon.com/Seam-Action-Dan-Allen/dp/1933988401/ref=pd_bbs_sr_2?ie=UTF8&s=books&qid=1213568813&sr=8-2

http://www.amazon.com/Practical-JBoss%C2%AE-Seam-Projects/dp/1590598636/ref=pd_bbs_sr_3?ie=UTF8&s=books&qid=1213568813&sr=8-3


56

Agenda

Introduction

Architecture

Configuration

Features

Pros & Cons


57

Pros & Cons

Seam Sweet spots Seam Gen (RoR)

Security (Role / Rule based)

Spring Integration

Integrated testing FW (TestNG)


58

Pros & Cons

JSF Shortcomings Too much wiring

HTTP GET / REST is hard

Complicated Lifecycle

Slow learning curve

Writing new components

Poor exception handling


59

References

JSF http://www.jcp.org/en/jsr/detail?id=252

http://jcp.org/en/jsr/detail?id=314

http://myfaces.apache.org/

Seam http://www.jboss.com/products/seam

http://www.seamframework.org/

http://www.jcp.org/en/jsr/detail?id=252

http://www.jcp.org/en/jsr/detail?id=252



http://myfaces.apache.org/

http://www.jboss.com/products/seam

http://www.seamframework.org/


60

Thank

You !

seminar.2008.jsf.seam

Documents