September 1999
Intermediate to advanced
256 pages
7h 5m
English
Content preview from Oracle Web Applications: PL/SQL Developer's IntroBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 4. Oracle Application Server (OAS)
Oracle Application Server (OAS) is Oracle’s enterprise web platform. While OAS performs all the functions of a normal web server, its main advantage is its tight integration with a backend Oracle database. After starting life with the name Oracle Webserver at version 1, then becoming Oracle Web Application Server at version 3, the Oracle Application Server, now at version 4, has steadily grown in size and features.
Tip
The resources required to run OAS have increased along with the new features. For example, the memory requirements (on NT, at least) went from 48 MB in version 3 to 128 MB in version 4.
In this chapter, we’ll look at the architectural components of OAS as they relate to PL/SQL application development. Be sure that you’ve read Chapter 2, which introduces the basic concepts behind the web infrastructure on which OAS is built. We’ll start with a discussion of how OAS returns web resources to a user’s browser. Then we’ll look at the PL/SQL cartridge, an OAS component we can use to develop PL/SQL applications.
How OAS Returns Web Resources
OAS has three methods to return resources. The first simply uses a directory mapping system to send static files to the client’s browser. The next two methods return dynamic resources: one executes resources using the standard CGI interface, and the other, the Web Request Broker (WRB), executes resources using a program called a cartridge.
As we saw in the previous chapter, the HTTP listener ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.