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User Guide
The information contained in this section applies to IBM WebSphere Commerce Version 7.0.0.9 and Feautre Pack 8. The documentation also applies to all subsequent releases and modifications until otherwise indicated in new editions.
Developing
The topics in the Developing section describe tasks performed by an application developer.
Presentation layer
WebSphere Commerce uses Java Server Pages (JSP) to implement the view layer of the Model-View-Controller (MVC) design pattern. The view layer is in charge of retrieving data from the database through the use of data beans and formatting it to meet the display requirements. The view layers determines whether the request is sent to a browser or streamed out as XML. JSP files present a clean separation between data content and presentation.
Customizing WebSphere Commerce Accelerator, Organization Administration Console, or Administration Console
The WebSphere Commerce browser-based tools (WebSphere Commerce Accelerator, Organization Administration Console, Administration Console) can be extended or changed. In addition to customizing the tools you can also create a new browser-based tool that uses the same underlying framework. A new tool based on the tools framework is referred to as a WebSphere Commerce tools user interface center.
Tools framework
The tools framework defines user interface elements and functionality used to control and manipulate these elements.
Logging and messages
The Tools Framework uses WebSphere Commerce's ECMessage logging and messages system.

Logging and messages

The Tools Framework uses WebSphere Commerce's ECMessage logging and messages system.

This framework defines two types of messages:

system
- used to communicate system information (such as errors or system generated warnings) to help diagnose problems.
user
- used to communicate user input related problems. For example, if a user wants to put ten items up for auction but only has five in stock, a message is displayed indicating the discrepancy.

Note: The purpose of logging messages in the WebSphere Commerce Server is to record unexpected errors or abnormal conditions within the WebSphere Commerce application. It is recommended that you use the WebSphere Application Server recommended tracing. For more information, see the topic Working with trace.