Dispatching an event to the listener previously happened from an
un-awaited goroutine, with only a log line on failure - once
processed_at was set, a dropped or failed notification was permanently
and silently lost, with no way to tell it had happened.
Replaces the processed/processed_successfully booleans with a
notified_at/processed_at pair (migration 000031): the dispatcher sets
notified_at and hands the event to MockEventListener.Notify, which now
also receives an ack callback the listener calls whenever it's truly
done, synchronously or arbitrarily later. Anything still "notified" but
unacked past notifyRetryAfter (a tunable field, not a stored
per-row timestamp) gets notified again on the dispatcher's normal
poll/reactive loop - no new retry mechanism needed. ack is idempotent,
since a late ack from an earlier attempt and one from a retry can both
eventually fire for the same event.
Dispatch is deferred until after the transaction that recorded
notified_at has actually committed, so ack's independent write can't
race a still-open transaction it implicitly depends on being visible.
The real SSE listener (server/sse/db_event_publisher.go) acks inline,
since its work is synchronous.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XEDaCB7C2NEBgyvqEtZuxY
Tests (and any other caller) previously had no way to know when the
Postgres LISTEN behind the reactive event-processing loop had actually
registered, forcing a guessed sleep before relying on it. Mocks now
exposes Ready() <-chan struct{}, closed once listenForNotifications
successfully issues LISTEN. Purely additive - ProcessEvents' signature
is unchanged.
Updates the integration tests to wait on Ready() instead of a flat
sleep, which also cut TestProcessEvents_ReactsToNotification's runtime
from ~0.25s to ~0.06s with no flakes across repeated runs.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XEDaCB7C2NEBgyvqEtZuxY
angelandClaude Sonnet 5