About Me​

Experienced freelance web developer, adept in WordPress and Java, with a dynamic career journey from an instructor to a skilled professional in IT companies and freelancing.

Latest Posts

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    What is Managed Bean?

    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…

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

    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.

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    What are various components in ADF?

    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.

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    What are various components in ADF?

    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.

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    What are the advantages of using ADF?

    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. –         …

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    What is Oracle ADF?

    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.…

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    Forward Recovery and Backward Recovery

    Transaction modifies data that are stored in a Database. Transaction must always pass ACID Test. Transaction has to make sure the data in database remains consistence after it modifies the database. For example: Online payment when made has to have effects on both parties. The amount must be withdrawn from one account and must be…

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    Database Recovery Using Log File

    Log file is the fundamental mechanism for data recovery as it contains all the updates made in the database. Such as Transaction records as well as Check point records. Transaction Records contains mainly the following information: 1)      Transaction Identifier 2)      Type of log records such as transaction start, insert, update, delete, transaction commit and transaction…

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    Pessimistic and Optimistic Concurrency Control

    Pessimistic Concurrency Control When two or more users wants to update the same record at the same time, they may end up with conflicts. Pessimistic concurrency control prevents such a situation by locking the record for the duration of a transaction to assure no conflict arises, unless deadlocks occurs. Optimistic Concurrency Control Optimistic Concurrency Control…

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