This is indeed wrong. In ajax requests, however, a special exception handler is needed. For explanation and an example, head to Exception handling in JSF ajax requests. Disclaimer: This content is shared under creative common license cc-by-sa 3. It is generated from StackExchange Website Network. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment.
Skip to content. Posted By: Anonymous What is the difference between action and actionListener , and when should I use action versus actionListener? Solution actionListener Use actionListener if you want have a hook before the real business action get executed, e. The actionListener method has by default the following signature: import javax. Invocation order The actionListener s are always invoked before the action in the same order as they are been declared in the view and attached to the component.
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Page Flow Scope : Choose this scope if you want the managed bean to be accessible across the activities within a task flow. A managed bean that has a pageFlow scope shares state with pages from the task flow that access it. A managed bean that has a pageFlow scope exists for the life span of the task flow.
View Scope : Use this scope for managed bean objects that are needed only within the current view activity and not across view activities. The life span of this scope begins and ends when the current viewId of viewport changes.
If you specify a view, the application retains managed bean objects used on a page as long as the user continues to interact with the page. These objects are automatically released when the user leaves the page. Request Scope : Use request scope when the managed bean does not need to persist longer than the current request. Backing Bean Scope : A backing bean is a convention to describe a managed bean that stores accessors for UI components and event handling code on a JSF page.
It exists for the duration of a request and should not be used to maintain state. This is used to register the skin-family you are going to use for your entire application.
This file provides a mapping between the skin id and the actual path where the skin exists. Whenever we recieve some message into the JMS queue, this onMessage will be invoked with the Message as parameter. Contextual Event is way to communicate between two taskflows.
Sometimes we have taskflow to open in a region and have to get some values from task flow. Your email address will not be published. What is Oracle ADF? What is the ADF Features? Its supports Rapid Application Development.
Describe them. The key ADF Business Components that cooperate to provide the business Service implementation is: Entity Object: An entity object represents a row in a database table and simplifies modifying its data by handling all DML operations for you. It can encapsulate business logic for the row to ensure your business rules are consistently enforced. You associate an entity object with others to reflect relationships in the underlying database schema to create a layer of business domain objects to reuse in multiple applications.
Application Module: An application module is a transactional component that UI clients use to work with application data.
It defines an updatable data model and top-level procedures and functions called service methods related to a logical unit of work related to an end-user task. When end users modify data in the user interface, your view objects collaborate with entity objects to consistently validate and save the changes.
What are the various components in ADF? ADF Controller: Task flows adf-config. How to enable security to ADF Application? Create a test user and assign an application role to it. Grant all required application resources to this role. How can you manage the transaction in ADF? Task flow supports different mode of transaction like: No Controller transaction Always begin new transaction Always use existing transaction Use Existing Transaction if possible 9.
What is the purpose of Chanage Indicator? How to develop Master-details view in ADF? What is the difference between Action and ActionListener?
Definitions : jazn-data. JDeveloper also updates the following files, which already exist: web. Application Module, manages transaction. What is the View object in the ADF framework? These view object can be created in different ways which are as follows: Entity-Based ViewObject: This view object will hold the reference of the underlying entity.
These view object can hold data from single or multiple entities. While defining Viewobject based on Entity you can select the attribute which you want to keep in the entity. This view object will have an underlying SQL Query. At runtime, they will hold data return by SQL. Programmatic View Object: User can define the view attribute which defining view object.
Data will insert programmatically into these ViewObject. Static ViewObject: While defining user will define an attribute for view and in later he has to provide the values for those attribute. This kind of view object will have fixed no of rows. What are Control Hints in Entity Object configuration? Control hints are associated with the current view or entity attribute.
All view objects inherit the hint values at run time. Entity objects will always have one to one relationship with a database object or web service. But using views you can create Entity Objects on multiple tables. What is the return type of Service Methods? Service Methods can return Scalar or Primitive Datatypes. Iterates over the business objects of the data collection and maintain the row currency and state.
Provides access to data. Provides access to operations defined by the business object. What is Association in ADF? What is the view link? Why we used an application module in the ADF framework? If you want to use any ViewObject on your page you must have to provide the reference in Application Module Can Service Methods return type Void?
Yes, Service Methods can Return type Void Can Service Methods return Complex Datatypes? What do you mean by Bean Scope? We will generally use that logic to invoke in button action listener or in some managed bean methods What is a region in Oracle ADF?
How to skip validation in ADF? How to make any field mandatory? What are the various access scopes supported by ADF? What are the types of ADF Faces components? Subscribe to: Post Comments Atom. While installing Oracle XE database into Windows operating system sometimes we might face below error message. Checking for Oracle XE serv KV Rao sir Java notes and some files on Java interview questions are avilable here.
I hope that these materials are helpful. Download Ja Most of the people confused while working with these two scopes. Lets try to know the difference. Generally request scope starts with a ne
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