Paul Rastoin
e99452e00d
## What
`MetricsKeys.CommonApiApplicationQueryRateLimited`
(`common-api-query/application-rate-limited`) is emitted from the
per-application throttler in `common-base-query-runner.service.ts`
**without any attributes**. Downstream that means a single
undifferentiated counter — there is no way to tell *which* application
is hitting `APPLICATION_API_RATE_LIMITING_LIMIT`.
This attaches the app dimension:
```ts
await this.metricsService.incrementCounterForEvent({
key: MetricsKeys.CommonApiApplicationQueryRateLimited,
shouldStoreInCache: false,
attributes: {
universal_identifier: authContext.application.universalIdentifier,
app_name: authContext.application.name,
source_type: authContext.application.sourceType,
},
});
```
## Why these three attributes
Same trio already emitted by `application-registration.service.ts`,
`application-install.service.ts` and `application-gauge.service.ts`, so
per-app API rate limiting joins cleanly against the existing app
lifecycle metrics rather than introducing a second naming scheme.
## Notes
- **No new data fetching.** `authContext` is already narrowed to
`ApplicationWorkspaceAuthContext` by the `isApplicationAuthContext`
guard at the top of the method, and the throttler key a few lines above
already reads `authContext.application.universalIdentifier`. `name` and
`sourceType` are plain columns on `FlatApplication`, present on the same
in-memory object.
- **Bounded cardinality.** `universalIdentifier` is stable for an
application across workspaces (see the unique index on
`(universalIdentifier, workspaceId)`), so the label set is bounded by
the number of distinct applications, not by installs.
- **`source_type` typing.** `ApplicationRegistrationSourceType` is a
string enum, assignable to OTel's `AttributeValue`.
## Context
The consuming dashboard panels are already merged-pending in
`twentyhq/twenty-infra` ([PR
#835](https://github.com/twentyhq/twenty-infra/pull/835)) and written
with a `coalesce(nullIf(Attributes['app_name'], ''),
nullIf(Attributes['universal_identifier'], ''), 'unknown')` fallback, so
they render today as a single `unknown` series and start splitting per
app automatically once this ships — no dashboard change needed on either
side of the deploy.
## Test plan
- Behaviour is unchanged: the counter still fires once per
`ThrottlerException`, and the error is still rethrown. Only the
attribute bag is new.
- I did not run the twenty-server test suite or typecheck locally — this
was authored against a shallow clone without a monorepo install, so I'm
relying on CI for both.
---
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