ADF Introduction By Sandeep Sharda
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This document provides an introduction to Oracle Application Development Framework (ADF). It discusses that ADF addresses challenges in building Java EE applications by providing visual and declarative development that reduces complexity and increases productivity. It implements standard Java EE patterns and best practices. ADF provides an end-to-end framework for building rich web, wireless, and Java client applications using model-view-controller architecture and data binding.
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ADF Introduction By Sandeep Sharda
- 1. Oracle ADF Introduction Prepared By Er. Sandeep Sharda Sr. Member Technical Staff Oracle.
- 2. Oracle ADF Motivation – 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.
- 3. Oracle ADF Introduction 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
- 4. Oracle ADF End-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
- 5. Oracle ADF Visual 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
- 6. Oracle ADF J2EE Architecture (Simplified) Enterprise JavaBeans ADF Business Components Web Services Business ServicesClients Java Objects Database
- 7. Oracle ADF No Standard API for Client Binding Enterprise JavaBeans ADF Business Components Web Services Business ServicesClients Java Objects Database JDBC?
- 8. Oracle ADF ADF Model Data Controls Data Binding JSR-227: “A Standard Data Binding & Data Access Facility for J2EE” Web Service TopLink EJB Java Class Business Component Model
- 9. Oracle ADF ADF 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
- 10. Oracle ADF ADF 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
- 11. ADF BC High-level architecture Payment Plan Mgmt HTML, Java, and XML Interfaces SlowPaying Customers Late Payments Customer Bill Payment View EntityApplication Business Logic Data Presentation & Manipulation Task-Based App Service
- 12. ADF BC Application Database Ord Customer Entity Objects Customer Order Top Customers Pending Orders View Objects Application Module
- 14. Entity objects encapsulate business rules, logic, defaults in a consistent way for a table
- 15. View objects encapsulate SQL queries to project, join, filter, order data for external client interaction
- 16. Application module defines data model of view object usages for a complete application use case
- 17. UI works with the application module as backend business service
- 18. As you build new applications, underlying components are reusable
- 19. 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 / JClientADFMetadataServices View Controller Model Business Services Swing / JClient JSP ADF UIX JSF/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 JDBC EJB Finders TopLink Queries ADF Business Components Query Object Data Access ADF Business Components Entity Object Java Classes EJB Entity Beans TopLink Mapping Persistent Business Objects ADFMetadataServices
- 20. 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
- 21. ADF Faces
- 22. 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
- 23. 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 XML URL WS
- 24. Demonstration A Web Application based on ADF Faces 1. Created ADF Business Components model 2. Layout flow 3. Made Edit page
- 25. Thank you