Oracle ADF Introduction

Prepared By

Er. Sandeep Sharda

Sr. Member Technical Staff

Oracle.

Oracle ADFMotivation – Challenges building J2EE apps

Building J2EE applications can be complex.

Development time can be extensive.

Choosing and implementing appropriate design patterns can be overwhelming.

“Do it yourself” applications often repeat existing application code.

A large portion of “do it yourself” code is dedicated to common tasks.

The more code you write, the greater the chance of errors.

An application framework is needed.

Oracle ADFIntroduction

Reduces the complexity of J2EE development by providing visual and declarative development

Increases development productivity– Less coding, more reuse

– Focus on the application, not the “plumbing”

Provides a flexible and extensible environment by allowing multiple choices and development styles

Encourages J2EE best practices by implementing standard J2EE design patterns

Oracle ADFEnd-to-end J2EE Framework

Implements standard J2EE best practices

Model-View-Controller (MVC) design pattern

Focus on the application, not the “plumbing”

Consolidation and evolution of previous frameworks

Business Services

Web and Wireless ClientsRich Clients

Model

Controller

Oracle ADFVisual and Declarative Development

End-to-end Application Development– J2EE & Services

Visual– UML modelers

– Structure pane

Declarative– Structure pane

– Property inspector

Code View/Design View Synchronization– No separate generation step - always synchronized

– Underlying code always accessible

Oracle ADFJ2EE Architecture (Simplified)

Enterprise

JavaBeans

ADF Business

Components

Web Services

Business ServicesClients

Java Objects

Database

Oracle ADFNo Standard API for Client Binding

Enterprise

JavaBeans

ADF Business

Components

Web Services

Business ServicesClients

Java Objects

Database

JDBC?

Oracle ADFADF Model

Data Controls

Data Binding

JSR-227: “A Standard Data Binding & Data

Access Facility for J2EE”

Web Service

TopLink

EJB

JavaClass

BusinessComponent

Model

Oracle ADFADF Model Architecture

Data control: describes the values and actions

defined by the business service

Client

Bindings

Data Control

Business Service

Bindings: define how UI

components use the

values and actions in

the data model

Oracle ADFADF Model Architecture

Decouples client and business service layers

Client code contains no references to the

business service

– Better design practice

– Code is more maintainable

Architecture can be extended to add more

types of business services

ADF BC High-level architecture

PaymentPlan Mgmt

HTML, Java, and XML Interfaces

SlowPayingCustomers

LatePayments

Customer

Bill

Payment

View EntityApplication

BusinessLogic

Data Presentation& Manipulation

Task-BasedApp Service

ADF BC Application

Database

Ord

Customer

Entity Objects

Customer

Order

TopCustomers

PendingOrders

View Objects

Application Module

Start with database tables

Entity objects encapsulate business rules, logic, defaults in a consistent way for a table

View objects encapsulate SQL queries to project, join, filter, order data for external client interaction

Application module defines data model of view object usages for a complete application use case

UI works with the application module as backend business service

As you build new applications, underlying components are reusable

ADF – Productivity With Choice

ADF UIX

ADF Bindings

ADF Data Control

ADF Business

Components

Service Object

ADF Business

Components

Query Object

ADF Business

Components

Entity Object

Swing / JClientA

DF

Me

tad

ata

Se

rvic

es

View

Controller

Model

Business

Services

Swing / JClient JSP ADF UIXJSF/ADF

FACES

Rich Client Web / Wireless

Struts/JSF

ADF Bindings

ADF Data Control

Java

Classes

EJB

Session

Beans

Web

Services

ADF Business

Components

Service Object

JDBCEJB

FindersTopLink

Queries

ADF Business

Components

Query Object

Data

Access

ADF Business

Components

Entity Object

Java Classes EJB Entity Beans

TopLink Mapping

Persistent

Business

Objects

AD

F M

eta

da

ta S

erv

ice

s

ADF Faces

Built on top of JSF APIs

A large component set >100 different components

Far more advanced and interesting components

– Partial-page rendering, etc.

ADF Faces skins (Look and Feel)

ADF Data binding

Open Source

ADF Faces

ADF Faces

ADF Faces also includes many of the framework

features most needed by JSF developers today:

– File upload support is integrated at a component

level

– Client-side validation is automatically derived from

Validators and Converters for an improved user

experience

– A pageFlow scope makes it easier to pass values

from one page to another

– A new hybrid state saving strategy gives developers

the best of both client and server-side state saving

JSF Architecture with ADF

EL accesses “bindings” object

to value bind UI components

ADF “bindings” object is set

through ADF Filter in web.xml

Bindings object accesses ADF

Binding container, which then

accesses DataControl

Business Services provide

access to various data sources

ADF “bindings” Object

ADF Binding

Renderer

UI Component Expr. Language

JSF Page

RDBMS

ADF DataControl

Business

Service 1

Business

Service 2

Business

Service 3

XMLURL

WS

Demonstration

A Web Application based on ADF Faces

1. Created ADF Business Components model

2. Layout flow

3. Made Edit page

Thank you