Discovering How the Data Is Sent to the Presentation Server

Started by sukishan, Aug 13, 2009, 07:06 PM

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sukishan

Discovering How the Data Is Sent to the Presentation Server
The messages exchanged between the presentation server and the application server are in an SAP proprietary format. The SAPGUI accepts the screen information sent from the application server and formats it appropriately for the platform it is running on. This enables different end-user hardware platforms to connect to a single application server. For example, an OS/2 PC and a Windows PC can both connect to the same application server at the same time.

Understanding the Components of a Work Process

Each work process is composed of the following:

A task handler

An ABAP/4 interpreter

A screen interpreter

A database interface

All requests pass through the task handler, which then funnels the request to the appropriate part of the work process.

The interpreters interpret the ABAP/4 code. Notice that there are two interpreters: the ABAP/4 interpreter and the screen interpreter. There are actually two dialects of ABAP/4. One is the full-blown ABAP/4 data processing language and the other is a very specialized screen processing language. Each is processed by its own interpreter.

The database interface handles the job of communicating with the database.
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