Oracle ADF Architecture

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Subject: Oracle ADF architecture Date: Sept 15,2011

Version Control

8Date Author Version Change

Sept 5th,2011 Sanjay Priyadarshi 0.1 Initial document

Content

Introduction................................................................................................................................................................1

What is Oracle ADF...................................................................................................................................................2

Business Services layer, Oracle ADF Business Components.................................................................................3

The Database.....................................................................................................................................................3Oracle Application Development Framework (ADF)........................................................................................4

Oracle ADF Application Modules.....................................................................................................................4

Oracle ADF View Objects.................................................................................................................................5

Oracle ADF Entity Objects................................................................................................................................7

Model layer, Oracle ADF Bindings.......................................................................................................................8

Controller layer, Oracle JSF...................................................................................................................................9

View layer, Oracle JSF........................................................................................................................................10

Introduction

This document describes the architecture of the Oracle Application Development Framework (ADF).

Oracle Application Development Framework (ADF) is used for creating GUI based applications, and is the

basis for Oracle Fusion Applications.

Oracle ADF is very much declarative based. However when extra functionality is needed, just apart from

the declarative based functionality, detailed insight of the framework is needed.


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What is Oracle ADF

Oracle Application Development Framework (ADF) is used for creating GUI based applications, and is the

basis for Oracle Fusion Applications.

ADF is based upon the Model View Controller (MVC) Pattern, which is a Framework commonly used for

Web Developmenthttp://java.sun.com/developer/technicalArticles/J2EE/despat/index.htm

View layerhandles the application user interface

Controller Layerhandles the application flow, acts as the interfaces between the Model and the View

Layers

Model layerhandles interaction with data sources and runs the business logic

The development is based upon a declarative way of working

Less coding for standard work

Standard way of working throughout the project

High productivity

Each layer can be filled in by a set of technologies

Preferred set for

WebDevelopment

View Layer JSF

Controller LayerJSF

Model LayerADF

Bindings

Business Services

ADF BusinessComponents

Source

http://www.oracle.com/technology/products/jdev/collateral/papers/1013/adf_10.1.3_overview.pdf

http://www.oracle.com/technology/products/adf/index.htm

Oracle ADF is completely based upon J2EE and open standards. The Development Environment is all done

in one Integrated Development Environment (IDE) JDeveloper, and is declarative based, a simple

application can be created without coding. As shown above the framework is set up in layers. Each layer

can be set up the way you want it. There is, however, an Oracle preferred set up, based upon JSF and ADF

Business Components. Oracle (Consulting) has created a Model Driven Development Tool on top of

ADF (JHeadstart,http://www.oracle.com/technology/products/jheadstart/index.html), which enables fastcreation of application pages based upon a model set up in ADF Business Components.

ADF simplifies J2EE development, but still it is J2EE development. In order to keep the Developers on the

leash (Java developers tend to like wandering around.), strict rules on how to use ADF need to (and can

be) set up.

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Business Services layer, Oracle ADF Business ComponentsThe basis for an Oracle ADF application is the Business Services part. When this part is done, the rest of

the development of the layers above will follow from it.

Preferred implementation of this layer is ADF Business Components (ADF BC).

ADF BC is based upon a multi layered Services Architecture. Later well show how we can map the ADF

BC layers three of our layers (Integration, Business Logic and Data)

First we start we start with a short description of all the components:

The Database

In the database we define the data model in which we store the data. A lot of data object types can be used

nowadays, but the most common are Tables and Views. Tables can be related to one another,

,

For instance a Department has Employees.

Functionality can be related to a table via a Trigger. .

A trigger can initiate functionality after an event, like the creation of a record, has happened.

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Oracle Application Development Framework (ADF)

The ADF Architecture is based upon the following three layers

Oracle ADF Application Modules

Functionality

Oracle ADF application modules are business components that represent particular application tasks. The

application module provides a data model for the task by aggregating the view object and view link

instances required for the task. On the technical level it takes care of transaction management and

connection pooling.

Level of data handling and type of Business Functionality containedThe level of data handling is based upon a group of Collection (multiple View Objects).

The type of Business functionality exposed is transaction based complex functionality based upon multiple

Database entities.

Based upon

View Objects

Relations to other Application Modules

An Application Module can be included by other Application Module, reusing the functionality contained.

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Example

Here an example which shows the

Data Model contained by the

Application Module.

A hierarchic structure can be seen,

which shows multi level master-

detail relationships.

Oracle ADF View Objects

Functionality

Oracle ADF View are business components that collect data from the datasource, shape that data for use by

clients, and allow clients to change that data in the Oracle ADF Business Components cache

Level of data handling and type of Business Functionality contained

The level of data handling is based upon Collection level (query result)

The type of Business functionality exposed is query based functionality

Based upon

Entities Objects.

Entity Objects can be reused by other View Objects.

Relations to other View Objects

View Objects can be related to one another like Database table foreign key relations

Example

Here a View

based upon two

Entity Objects.

There is always

one main Entityobject.

Other Entity

objects can be

used as reference.

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An example of a

Query

View Objects can

be related to one

another like

Database table

foreign key

relations

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Oracle ADF Entity Objects

Functionality

Oracle ADF Entity Objects are business components that encapsulate the business model, including data,

rules, and persistence behavior, for items that are used in your application.

Level of data handling and type of Business Functionality contained

The level of data handling is based upon Record level of a Table or a View.

The type of Business functionality exposed is transaction based functionality based upon one Entity Object,

and in more detail, on one record.

Relations to other Entity Objects

Entity Objects can be related to one another like Database table foreign key relations

Example

Entity Objects

can be related to

one another like

Database table

foreign key

relations

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Model layer, Oracle ADF BindingsThe Oracle Application Development Framework (Oracle ADF) enables data binding through the objects

of the Oracle ADF model layer. This layer only contains a set of XML descriptors, called the Data Control.

Every ADF BC Application Module is

exposed as a Data Control. This Data

Control is visible in the View layer in

the Data Control palette.

Here the contents of Application

Module

AppModuleRaadplegenDataControl is

shown.

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Controller layer, Oracle JSFJava Server Faces (JSF) is a Java framework for building Web applications, and is based upon a

specification by Sun. It is a drag-and-drop technology which simplifies development of pages and page

flow.

For more information see

http://java.sun.com/javaee/javaserverfaces/

http://www.oracle.com/technology/tech/java/newsletter/articles/introjsf/index.html

The preferred implementation of the Oracle ADF Controller layer is JSF.

In a visual editor you can Design the page flow.

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View layer, Oracle JSFThe preferred implementation of the Oracle ADF View layer is also JSF.

With Drag-and-Drop you can create a page.

With the creation of a JSF page, at the same time a page definition XML file is created, in this file is

defined where all the data comes from, this is done via a reference to the Data Control, and what action

take place on the page.

For more information see http://www.oracle.com/technology/products/jheadstart/index.html

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Oracle ADF Architecture

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