HP e-Commerce / XML director server appliance sa8250 - Users Guide

C H A P T E R 2 HP e-Commerce/XML Director Server Appliance SA8250 User Guide
12
XML
Operations
The SA8250 provides a powerful means of using eXtensible Markup
Language (XML) technology to facilitate B2B transactions. In
addition to its XML capability, the SA8250 provides Layer 4 (HOT)
services, Layer 7 (RICH) services, and Secure Sockets Layer (SSL)
acceleration.
The SA8250 accepts user-created rules regarding the content of
information transmitted in XML documents, and uses the rules to
route the information to the appropriate data center resources.
Before you can configure the SA8250, you must first obtain the
following information:
• Which of the several common formats or varieties of XML will
be used in the client application
• Which elements, attributes, or data in the anticipated XML traffic
represent the significant markers by which value is determined
You control the XML functionality using the XML Server Tab of
Policy Manager screen in the Graphical User Interface (GUI, Chapter
4), or the Command Line Interface (CLI, Chapter 5), as demonstrated
in this chapter. The SA8250 manages XML traffic using the “XML
expression,” a definition of one or more patterns that describe
specific conditions to be compared with incoming XML data.
Patterns are assigned only to servers identified by their IP address and
port. When a match between a pattern and the incoming data occurs,
the SA8250 routes that data to the desired server for fulfillment.