IBM Version 5 11.2 Solution outline for customer registration sample

Chapter 11. Light weight XML-based Enterprise Application 259
11.2 Solution outline for customer registration sample
An overview of the sample application can be found in Chapter 8., “WebSphere
and XML approaches” on page 163. This chapter discusses the interaction
between solution components, before we progress to building the application.
There are two possible ways of interaction between the components of the
system. This difference in interaction is based on the target functionality. We
focus on the set of interactions for storing data, then we discuss the set of
interactions for retrieving customer information.
11.2.1 Customer registration
When registering, the user enters the necessary registration data in the form
provided by the HTML in the client layer. When the user presses the Submit
button, a series of interactions between system components take place, as
indicated in Figure 11-2 on page 260, and in t he following steps:
1. The HTML sends the customer registration data through the HTTP request to
the servle t, invoking the ser vlet doPost metho d.
2. The servlet extracts the data from the request, and creates a new
CustomerXML object and set required properties with the extracted
registration data.
3. The servlet invokes Customer XML object’s produceDOMSource method and
get an XML document.
4. The servlet invokes XMLToSQL library.
5. XMLToSQL executes INSERT using the XML document.
6. The servlet instantiate XSLT Processor.
7. The XML documen t is input for the XSLT Processor.
8. The pre-designed XSL applied and result HTML has been generated and
transferred to the browser.
Tip: The XML document can be created manually using JAXP.