The application server’s position in the PIA system

When a user navigates through a PeopleSoft application using a browser, a number of things happen under the covers. Below we follow a path that takes a request for a page of data about a student, Mark Larsen, from the database to the browser.

1. PeopleTools tables

All the raw data required to assemble the student data page is contained in PeopleTools tables. This includes definitions of the component, page, fields, navigation, and other elements. This raw data is sent to the application server for assembly.

2. Application data tables

The information about Mark Larsen is retrieved and sent to the application server.

3. PeopleSoft services

There are dozens of individual processes running here. One (PSAPPSRV) takes the PeopleTools data and application data about Mark Larsen and assembles it into HTML for display.

4. BEA Tuxedo and Jolt

BEA Tuxedo manages the multiple connections to the database. Jolt is a Java-based communication protocol. The assembled HTML is sent to the Web server.

5. Java servlets

Individual programs manage the state of each user session, including a buffer that allows the use of the browser Back button. Servlets pass the HTML to Web services for display.

转载于:https://www.cnblogs.com/GoDevil/archive/2008/12/24/1361286.html