Classroom Session Shutdown: Revoke Tokens Before Channel Cleanup and Attendance Logging

The article argues that a classroom's in-app notification channel should be shut down in a fixed order: revoke issued tokens, disconnect remaining clients, then delete the channel. It recommends that a Node.js Express application handle this as one shutdown operation that also records the session end time for attendance reporting. Revoking tokens first prevents clients from reconnecting and recreating state, while deleting the channel first would leave them retrying. The piece also stresses tracking each shutdown step with identifiers so responders can tell an incomplete shutdown from a finished one followed by rejected reconnects. It separates a student's temporary connection loss from a teacher ending the class, and presents the instrumentation as a proposed design rather than a built-in provider feature.