bcquality/community/knowledge/appsource/do-not-subscribe-to-company-open-events.md

bc-version	domain	keywords	technologies	countries	application-area
all	appsource	onbeforecompanyopen onaftercompanyopen company-open event-subscriber login	al	w1	all

Do not subscribe to company-open events

Description

Marketplace extensions must not subscribe to OnBeforeCompanyOpen or OnAfterCompanyOpen. These events run on the sign-in path, where an error can prevent access and even small amounts of work affect every company open. Move initialization to installation, upgrade, new-company initialization, or the first use of the feature instead.

Best Practice

Initialize app data from install or upgrade code when its lifecycle belongs there. For work that can wait, perform an idempotent check when the feature is first used or schedule background work. Use OnCompanyInitialize only for data that must be created for a new company.

See sample: do-not-subscribe-to-company-open-events.good.al.

Anti Pattern

An event subscriber bound to OnBeforeCompanyOpen or OnAfterCompanyOpen, even when its current body appears lightweight. Detection signal: either company-open event name in an EventSubscriber attribute.

See sample: do-not-subscribe-to-company-open-events.bad.al.

See also

community/knowledge/performance/oncompanyopen-subscribers-must-not-do-io.md covers I/O and other expensive work on adjacent session-open events.