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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.
Controller layer
The Controller layer is the conductor of operations for a request. It controls the transaction scope and manages the session related information for the request. The controller first dispatches to a command and then calls the appropriate view processing logic to render the response.
Integrating with back-end systems and external applications
External systems integration is a key feature of the WebSphere Commerce solution. In WebSphere Commerce business logic is enabled for integration and built-in adapters and interfaces are provided for common integration points. Additionally, the WebSphere Commerce integration solution leverages integration standards by using various IBM connectivity solutions.
Back-end integration legacy messages
The WebSphere Commerce offers support for messages which use the legacy message format. Unless you are migrating from a previous version of WebSphere Commerce Suite, it is recommended that you use the XML messages instead, since they accomplish the same function, and are easier to read and maintain.
Order Create message
The Order Create message is an outbound message that contains order details for a completed order. The WebSphere Commerce system generates this message and sends its data to an outbound message queue, where a back-end system receives the message. This application takes the message and continues any back-end business processes required to complete the specified task for the order. Use Order Create to fulfill the order process of orders that begin with the WebSphere Commerce system, but also require some additional or back-end work by a separate system.
DATUSR_DATA for outbound messages
The outbound message Order Create includes the DATUSR_DATA data segment. Include the DATUSR records in this message to send additional data. You can customize the fields to pass extra data that is not included in the messages.

DATUSR_DATA for outbound messages

The outbound message Order Create includes the DATUSR_DATA data segment. Include the DATUSR records in this message to send additional data. You can customize the fields to pass extra data that is not included in the messages.

The format and the source of the fields for DATUSR_DATA are described in the following table:


Field Name	Field Type	Description
NC_FieldName	CHAR (8)	Name of the new field to be added.
NC_FieldLength	CHAR (10)	Length of the NC_FieldValue field.
NC_FieldValue	CHAR (variable)	Text string for the value of the new field.