Appia Internal Middleware Event—Used to provide information about the middleware. These events are always delivered to the application, and include MIDDLEWARE_OPENED and MIDDLEWARE_CLOSED, indicating the state of the Appia middleware connection.

Appia Inbound Message Event—Used to deliver inbound application messages sent from your partner to FIX Module, as well as inbound session-level messages and error notifications relating to inbound messages.

Appia Outbound Message Event—Provides information about the progress of an application message sent from FIX Module to the Appia engine, for example, the progress of the message delivery, acknowledgments, or error details.

Appia Session Event—Indicates a change in the session state, such as a connect or a disconnect event. By default, the session event attribute is set to deliver session events to FIX Module.

Appia Global Event—Issued when a condition occurs in the Appia server that can impact multiple sessions. For example, Appia will issue a global event when the Appia engine is shut down.

Appia Miscellaneous Event—Includes notifications for when a restore is finished and when an outbound message has a serious problem.