Sonar, Splynx, VISP, NetBox, and Gaiia sync workers all followed the same
"cron runs, then Enum.map syncs every integration in the same job" shape.
A single slow tenant — anything from an upstream rate limit to a stuck
GraphQL call — would hold the maintenance queue slot for ten minutes
while every other integration waited in line.
Each worker now uses the dispatcher/per-integration pattern that
UispSyncWorker already had:
- the cron `perform(%Oban.Job{args: %{}})` fans out one job per eligible
integration via `PollingOffset.calculate_offset/2`, staggered across a
5- to 10-minute window with `unique: [period: window_seconds]`
- `perform(%Oban.Job{args: %{"integration_id" => id}})` does the actual
sync, classifying failures via `Towerops.Workers.SyncErrors.transient?/1`
so permanent errors (auth, 4xx) don't get retried forever
Worker-specific defaults preserved:
- gaiia / netbox: 30/600s window, longer interval
- sonar / splynx / visp: 10/300s window
Tests updated to match the two-stage dispatcher pattern — `perform_job/2`
with empty args now asserts the per-integration jobs got enqueued and
the actual sync is invoked via a separate `perform_job/2` call with the
integration_id arg.
Graham McIntire
52cde2cbc5