Transcript
Oracle ADF Overview
Prepared By
Karsten Schulz Terp-Nielsen @Oracle Denmark
Presented By
Bahaa Farouk @hp Egypt
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 technology 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 ServicesBusiness Services
Web and Wireless ClientsWeb and Wireless ClientsRich ClientsRich Clients
ModelModel
ControllerController
Oracle ADFVisual and Declarative Development
End-to-end Application Development– J2EE & Services
Visual– WYSIWYG editors– 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)
EnterpriseJavaBeans
ADF Business Components
Web Services
Business ServicesClients
Java Objects
Database
Oracle ADFNo Standard API for Client Binding
EnterpriseJavaBeans
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
ModelModel
Oracle ADFADF Model Architecture
Data control: describes the values and actions defined by the business service
ClientClient
BindingsBindings
Data ControlData Control
Business ServiceBusiness 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 Business Components
Simplifies and optimizes binding of View to logic
Simplifies and optimizes O/R mapping
Flexible Deployment
Deployed either as a Local Model or as a remoteSession Facade
ADF BC High-level architecture
PaymentPaymentPlan MgmtPlan Mgmt
HTML, Java, and XML Interfaces
SlowPayingSlowPayingCustomersCustomers
LateLatePaymentsPayments
CustomerCustomer
BillBill
PaymentPayment
ViewView EntityEntityApplicationApplication
BusinessLogic
Data Presentation& Manipulation
Task-BasedApp Service
XMLXML
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 ChoiceADF UIX
ADF Bindings
ADF Data Control
ADF Business Components
Service Object
ADF Business ComponentsQuery Object
ADF Business ComponentsEntity Object
Swing / JClientA
DF
Me
tad
ata
Se
rvic
es
View
Controller
Model
BusinessServices
Swing / JClient JSP ADF UIXJSF/ADF FACES
Rich Client Web / Wireless
Struts/JSF
ADF Bindings
ADF Data Control
JavaClasses
EJBSessionBeans
WebServices
JDBCEJB
FindersTopLinkQueries
DataAccess
Java Classes EJB Entity Beans
TopLink Mapping
PersistentBusinessObjects
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 model support out-of-the-box ADF Faces skins (Look and Feel)
ADF Databinding (JSR 227) Open Source per January 2006
– http://www.oracle.com/technology/products/jdev/htdocs/faq_adffaces_apache.html
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
BusinessService 1
BusinessService 2
BusinessService 3
XMLURL
WS
Demonstration
Develop a more complex Web Application based on ADF Faces 1. Create ADF Business Components model
2. Layout flow
3. Make Edit page
4. Optional: Make Create page