I was searching for support matrix for last 2-3 days and at last helped by Jan Vervecken, Belgium.
I am really thankful to Jan for pointed me to following url
Application Servers Supported by JDeveloper

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Recently I was stuck with Authorization & Authentication related problem that I faced when working on my recent and first project in J2EE & ADF.
Now things look cool although stuck little bit on Form Based Authentication.
I am really thankful to Andrejus Baranovski for posting just a nice, simple and upto mark blog entry about it called J2EE Container-Managed Authentication

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We’re getting increasingly poor performance in Jdeveloper.
Expanding a project after 5 minutes of starting JDeveloper takes a long time, opening any file or opening file in JSF editor causes the CPU usage spike to 100% for around 1 minute , and changing a property in the JSF editor takes about more than 10 seconds.
So I tried to investigate what exactly causing this and tried to check whether anybody else also experiencing same prooblem.
I found some hint in oracle forum in thread no 1723266.
Here Sandra Muller from Oracle’s JHeadstart Team suggested to do following step everytime one is starting JDeveloper.
* Before […]

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Before we dive into different style of database application architecture based on different combination of J2EE component, let us first understand few critical components. Understanding of these critical components will help us in understanding these styles in much better way.

First in line is Understanding JDBC (Java Database Connectivity)
In Oracle SQL*Net is the default method of connecting with the database. It allow easy access to the database from an Oracle client application. We don’t need to worry about anything.
But when accessing it from Java Program we cannot use SQL*Net as Java does not support it.This is where JDBC comes in.
The Java […]

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After going through both architecture in my previous blog. I tried connecting both architecture as follows based on my understanding:
MVC J2EE Component
Model Enterprise Data Tier
View Client Tier
Controller Middle Tier

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J2EE is not an product but a specification which describes a proposed standard for building applications that meet the requirements of enterprises.
The goal of the J2EE platform is to answer the need for faster, more efficient, and larger-scale information management solutions. It meet these challenges by providing a programming model that improves development productivity, a standardized platform for hosting enterprise applications, and a test suite used to ensure platform compatibility.
J2EE architecture supports component-based development of multi-tier enterprise applications. A typical J2EE application system includes:
Client Tier
User interface code runs on this tier. This tier can consist of Hypertext Markup Language (HTML) […]

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The Model-View-Controller (MVC) is a commonly used and powerful architecture for designing GUI.
The MVC design architecture was originally developed for Smalltalk, where it was originally applied to map the traditional input, processing, and output tasks to the graphical user interaction model.
MVC defines a separation of application code into three layers as follows:
Model Layer
Responsible for maintaining data.
Responsible for notifying view of changes in the data.
Responsible for processing request from controller layer to update data .
In short it represents enterprise data and the business rules that govern access to and updates of this data.
View Layer
Responsible for displaying all or a portion of […]

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J2EE (Java 2 Platform Enterprise Edition) is a platform-independent, Java-centric environment from Sun for developing, building and deploying Web-based enterprise applications.
The J2EE platform consists of a set of services, APIs, and protocols that provide the functionality for developing multitiered, Web-based applications.
In short it is not a product but a set of standards and specification maintained by the Sun Microsystems.
From version 1.2 to 1.4 these sets of standards and specification were know as J2EE.
Now with recent release of version 1.5 or version 5.0 these specification and standards has beem renamed to Java EE 5.

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If we analyze history, we will come up with three types of Database Application Architecture are as follows:
Single Tier
In Single Tier or Mainframe architecture everything from database to application program used to be in single computer.All processing occurs on this single computer. The user interacts with application through dumb terminals.
Two Tier
In Two Tier or Client/Server architecture, database reside in Main Computer called server and Application program reside in each user computers called Client.Processing is divided between two, data processing occurs at Server and application processing is the responsibility of the client machine.
Multi Tier
In Multi Tier or Nth Tier architecture,there are […]

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I started my research around JDeveloper. Trying to think what combination technology or stack of technology will be good for me to built application based on J2EE design patterns. What can help me focus more in business logic as I used to do in Oracle forms rather than on technology.
Then I found out:
“Many of the features in JDeveloper and Oracle Application Development Framework(ADF) provide design-time and runtime productivity services not dissimilar to those found when developing using 4GL tools such as Oracle Forms; and as such, when it comes to building Java EE applications with JDeveloper and ADF, many of […]

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