Client/Desktop/Presentation Tier in Apps

In Oracle Applications 11i , Each user logs on to the oracle Applications through the E-Business Suie Home Page on a Desktop client web browser.The E-Business Suite Home Page provides a single point of access to HTML-based applications, Form-based applications and Business Intelleigence applications.
Q. Does OA registers preferences( Languages)?
Ans: O, Yes, OA retains preferences as you navigate through the system.If you have registered "German" as your preferred language, this preference carries over whether you access Forms-based or HTML-based applications.
DESKTOP TIER:
The forms Client Applet:
- Is a general-purpose presentaion applet.
- Supports all OA Form based products.
- The Forms client applet contain all Java classes required to run the presentation layer of OA forms.
Oracle JInitiator
The forms Client Applet must run with in a JVM on the desktop client.The Oracle JInitiator component allows use of the Oracle JVM on web clients, instead of browser's own JVM.
Q. What will happen if the Jinitiator is not installed in a M/C running Oracle application?
Ans: Traditionally Jinitiator was run as a part of standard Applications sign-on process but with the move to a mainly a HTML-based environment , Jinitiator is only invoked when a user chooses to access functions that require it( e.g. Forms).
If the Jinitiator is not installed , the Web browser will prompt the user to download the required installation executables.
Note:
The forms Client Applet and the used JAR files are downloaded from the web server at the beginning of the client's first session.Less commonly used JAR files are downloaded as needed.More importantly all downloaded JAR files are cached locally on the client, ready for future sessions. This eliminates network traffic that would be involved in downloading them.
Q.How do I check that the JAR files are downloaded at the beginning of the client's session?
Ans:Selecting "Show Console" on the "Basic" Jiitiator will allow you to observe downloading of the JAR files , to confirm that they are being downloaded when they should be.
VVIP: All updates to the JAR files are installed on the application tier and downloaded to the client automatically via the caching mechanism.