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Steve Job Died On Oct 15 2011

admin — Thu, 06 Oct 2011 00:31:54 +0000

The man who is behind Iphone, IPod, IPad, Mac,… died Today… May god Guide him to way to Heaven ….

What is the difference between Bounded and UnBounded taskflows?

admin — Wed, 21 Sep 2011 19:42:25 +0000

Bounded TF have single entry point and can have zero or more exit points. Whereas Unbounded TF has one or more entry point for the application (adfc-config.xml).

Bounded TF must have a default activity (Which is the entry point) whereas Unbounded TF cannot have default activity.

Bounded TF can be parameterized where as UnBounded TF cannot be parameterized.

We can create multiple Unbounded TF but during runtime they all become into one unbounded TF, thus resulting into inefficiency whereas it’s not true in the case of Bounded TF.

Bounded TF is re-usable whereas UnBounded TF is not.

We can implement Undo feature with Bounded TF( because it supports Transaction) but UnBounded TF doesn’t.

In Nutshell, We have to have one Unbounded TF and many Bounded TF to take advantage of many features such as re-usability, train stop, data sharing between task flows , transaction, etc.

What is a Taskflow?

admin — Wed, 21 Sep 2011 19:40:40 +0000

Taskflows are the controllers for the ADF. ADFc is the biggest and important new feature in the Oracle ADF framework.

Developers can easily drag and drop page/ fragment, check condition (Router), call another task flow (reusability of Taskflow is seen here) , call method (either managed bean or method from data control) and can easily draw control flow case.

Categories of Taskflows :

Bounded: It have Single Entry Point and can have zero or more exit point.

UnBounded: It is the entry point to the application.

What is difference between managed and backing beans?

admin — Wed, 21 Sep 2011 19:36:46 +0000

Although general convention is to use one Managed beans per JSF page/fragment, but managed beans can be used with multiple pages. But Backing Bean can be only used for single page/fragment.

Normally, Managed Bean is desired to have Pageflow scope, but can use even higher Access scope.

Backing Beans are not expected to have higher access scope. They are recommended to run on lowest access i.e on BackingBeanScope.

What is Managed Bean?

admin — Wed, 21 Sep 2011 19:32:21 +0000

Managed Bean is a java bean (to be java beans, we have to have default no argument constructor) that is created as well as destroyed by the JSF framework itself.

Used to process event handling.

Managed bean may be associated with jsp/jspx/jsf page and if needed, managed bean can have accessors for object of the page and it can manipulate the value of the object programmatically.

Can an entity object be based on two Database Objects(tables/views) or two Webservices ?

admin — Wed, 21 Sep 2011 19:30:33 +0000

No, rather we have entity object that is even not based on Database table/view. Also if required we can add transient attribute as well.

What are various components in ADF?

admin — Wed, 21 Sep 2011 19:27:57 +0000

ADF UI Components : There are 150+ ajax enabled , Rich UI component, Broadly under :

- Layout Components

- Common Component and

- Operation Component

ADF Business Component: primary BC are :

- Entity

- ViewObject

- ApplicationModule

- ViewLinks and Associations.

ADF TaskFlow : Bounded and Unbounded Taskflow.

What are various components in ADF?

admin — Wed, 21 Sep 2011 18:24:19 +0000

ADF UI Components : There are 150+ ajax enabled , Rich UI component, Broadly under :

- Layout Components

- Common Component and

- Operation Component

ADF Business Component: primary BC are :

- Entity

- ViewObject

- ApplicationModule

- ViewLinks and Associations.

ADF TaskFlow : Bounded and Unbounded Taskflow.

What are the advantages of using ADF?

admin — Wed, 21 Sep 2011 18:22:45 +0000

From User prospective:

- Rich interface.

- Easy to use and/or learn to use.

- Much information on single page (accordion layout, collapsible panel, and so forth).

- Consistent look and feel.

- Drag and Drop facility, etc.

From Developer prospective:

- Declarative way of building application.

- 150+ ready to use Rich component.

- Multiply ways to develop and reuse components (declarative component, page template, taskflows, etc.)

- Customizable

- Maintainable

- Highly decoupled

- SOA enable, And so forth.

What is Oracle ADF?

admin — Wed, 21 Sep 2011 17:54:24 +0000

Oracle ADF is a JEE framework to develop rich internet application (RIA), which comes with easy and declarative way of building web application in a JEE environment along with standard pattern thereby reduces the effort for programmers. It implements MVC pattern and offers solutions such as: ORM, Data persistence, reusable component, data binding, security, etc. Besides that it also integrates with SOA. There by making excellent choice for any RIA application in the JEE environment.