The WebSphere Commerce messaging system provides a mechanism for integrating WebSphere Commerce with back-end systems through the use of inbound and outbound messages. Inbound messages are used to run commands in WebSphere Commerce based on messages coming from back-end systems. Outbound messages can be generated by the outbound messaging system in order to update back-end systems with events that have taken place, such as a new customer order. To use back-end integration messages, you must have an adapter installed, and have the messaging system configured to receive XML messages.
The messaging system is prepared to send and receive a number of pre-defined messages in XML format. This format offers a high degree of readability, making the messages easy to modify and maintain. You can also use the legacy message format. However, the XML message format is recommended. For an explanation of each message, refer to the sections on inbound and outbound back-end integration messages. You can also add new messages. For new inbound messages, you can associate them with either existing WebSphere Commerce commands, or commands that you have created.