This change makes AppState and Listener modules independent from the way how application is terminated. It removes stateMainThreadId from AppState and introduces stateKillApp. It also removes exported function AppState.getMainThreadId replacing it with more general killApp.
Schema cache query timings are only needed immediately after a schema-cache reload to emit SchemaCacheQueriedObs. Storing them inside SchemaCache makes the cache carry transient observability data that is not part of the cached schema state and is never used by request handling.
This change makes querySchemaCache to return query timings in a tuple in parallel to SchemaCache and removes dbQueryTimings field.
This commit removes auth middleware for it hides
side effects and obscures logic. The auth operations
are now done in its own stage in the request-response
cycle.
It also removes the logging middleware because now
we instead use observation module to log the response.
Some helpers are provided for introspecting metrics already (used in JWT cache tests). This change provides facilities to additionally validate emited Observation events.
A new Spec module is also implemented, adding basic tests of schema cache reloading - their main goal is to excercise the new infrastructure.
- Create separate test suite for observability tests
- Create wrapper script `postgrest-test-observability`
- Add to CI and `postgrest-check`
- Move JWT cache tests under observability tests
Signed-off-by: Taimoor Zaeem <taimoorzaeem@gmail.com>
