By: Rohan Walia
Oracle ADF and Webcenter Portal Implementation Specialist
Must Be thinking !
Oracle ADF and Webcenter Consultant.
Oracle Certified ADF & Webcenter Implementation specialist.
Consultant, Blogger, Speaker and open networker.
Passionate about Oracle Technologies.
Have been working in Oracle/Java products from 8.5 years.
Currently working with Oracle Consulting.
Blog – http://rohanwalia.blogspot.in/
Twitter - @rohanwalia17
Nothing is as Certain as “CHANGE”
Good Applications is one with Longevity.
Need to protect the investment in Application Development.
Need to react to change should be part of App Design.
It should not come as a shock after App Development.
Personalization - User Customizations
Seeded Customization
Personalization or User Customization
Every end user is Unique.
Different preference for how they like UI to be
rendered.
Users like to make themselves at home within the
application.
Visual and declarative development using Best Practices.
ADF uses XML where ever possible, to configure and drive these
technologies.
Provides powerful MDS Framework for
Customizations/Personalizations.
This use of metadata is a key component of the overall ADF
architecture.
XML enables OOTB Customization as these are done using XML and
not code.
Code does not needs to be compiled to apply Customizations.
Provides configurations to enable and implement customizations
without too much learning curve.
MDS in Oracle ADF
Metadata Services (MDS)
Desktop
ADF
Swing
Mobile
Office
Browser-Based
JSF
Mobile
JSF
ADF Faces
ADF Controller
ADF Binding
Java
EJB
ADFBC
BAM
Web Services
View
Controller
Model
BPEL
BI
Portlets
Business
Services
Data Services
Database
Web Services
Legacy Systems
Apps Unlimited
Oracle Metadata Services (MDS) is the personalization and customization
engine within Oracle Fusion Middleware that manages all of this XML
metadata of behalf of components such as JDeveloper and ADF.
Metadata is used by the following components
ADF Faces rich client Java Server Faces components
ADF Faces Data Visualization Tools (DVT)
ADF Task Flow
ADF Binding layer
ADF Business Components
Oracle WebCenter
Dynamic Structure and Property changes.
Changes are on Metadata of Views, bindings and fragments.
Addition and removal of properties on the components of Page or
Fragments(JSFF).
Application consist of one Base Application.
One or Many Customization Layers holding modifications are applied at
runtime.
Customization layer is defined by set of metadata documents.
These are stored in metadata store on file system or MDS database
repository.
Customization layer Object determines when to apply these changes.
Customization layer object is simple java class.
Customization layer determines specific conditions under which
customization needs to be applied to application on run
Metadata
Repository File or DB
Plain Old Java Object
Determines when to apply customization to base document.
Objects for Common scenarios is provided by ADF Framework.
Customization Layer Object needs to be registered in the application.
E.g. : UserCC , SiteCC , ADFRoleCC etc.
Developer can create Custom Object by extending
oracle.mds.cust.CustomizationClass
Needs to override getCacheHint() , getName() and getValue() methods.
Value returned by getValue() method determines when to apply
customization
ADF Faces components are added in adf-config.xml for which persistence is required.
Context Param CHANGE_PERSISTENCE is added to Web.xml
Has value FilteredPersistenceChangeManager
MDSDocumentChangeManager gets Configured in adfadf-config.xml
Component Changes occur in response of User – UI Interaction.
They consist of change of properties/attributes of components.
Implicit component changes are performed by the ADF Faces component
renderers.
Implicit changes are defined in adf-config.xml components and tags.
Explicit changes are initiated by developer using ADF ChangeManager API.
ChangeManager can accessed through FacesContext to perform explicit
changes.
FilteredPersistenceChangeManager
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Gets into action for every UI component change request.
Verifies that no restrictions have been applied by the developers to individual component instances.
Verifies whether restrictions are applied using persist and dontPersist attributes on Components.
MDSDocumentChangeManager
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After all the validations(as above) changes are passed to MDS Document Change Manager.
Is referenced by FilteredPersistenceChangeManager after validations in defined in adf-config.xml
Updates the MDS metadata document associated with a page.
Allow developers to pre define application settings for individual or group of
users.
Seeded Customizations are pre defined during development.
They are dynamically applied to the application at runtime.
Changes are done for Customization Values
in Customization Developer Mode
Questions ?
in.linkedin.com/in/rohanwalia/
er.walia@gmail.com
@rohanwalia17
http://rohanwalia.blogspot.in/