gtpd2m1q | Data Communications Services Reference |
Application recovery support is an option of the TPF system environment. This package uses the application recovery table, AR0RT, as a vehicle for providing a user (application) with message recovery capability.
The integrity of the application recovery table (ART) is maintained by the system; this package provides the application with the means by which an ART item can be obtained, referenced, keypointed, and deleted. At any point in its processing and cycle, an application can save input, output, or user data on file and reference it via its associated ART item, and/or it can save data in the optional data area of the ART item. An ART item, once obtained by an application, will be maintained until deleted by the application. Should application processing be interrupted because of application or system error, this package provides a timeout function which will reactivate the application using Routing Control data (RC0PL) maintained in the ART item. The application interface program, referenced in the Routing Control Table, cannot be corefast.
The following diagram illustrates the area in which application recovery operates: