Scan command context

The scan command context contains the scan-specific runtime information used by the observation supervision layer and by the scan consistency policy.

It links an accepted Scan command to the runtime information required to evaluate the scan lifecycle consistently. This includes the devices selected for the scan, the optional scan schedule, and the retained scan context used after the Scan command has completed.

Scan command context handling is different from the default command context lifecycle. For most commands, the command context is discarded after command completion. For Scan, the completed context can be retained because the scan lifecycle may still be relevant after the command itself is no longer active.

This is required in two cases:

• for legacy scans, where the command context is used while the CSP Subarray is expected to be in SCANNING;

• for scheduled scans, where the command context must also be preserved while the scan is pending and the CSP Subarray may still be in READY.

The scan-specific command context documentation is organised as follows.

Scan command context

• Configured devices for scan
• Scheduled scan
• Retained Scan Context
• Scheduled scan policy