Struct SchemaObserver 

pub struct SchemaObserver { /* private fields */ }

Opt-in counter that classifies each observed event and tallies per-schema (and unknown) totals. Mirrors the design of FieldObserver: shared behind an Arc, cheap repeated snapshots, monotonic lifetime counters for a Prometheus bridge. The schema set is small and bounded, so there is no key cap.

Implementations

impl SchemaObserver

pub fn new(classifier: SchemaClassifier) -> Self

Create an observer backed by the given classifier.

pub fn builtin() -> Self

Create an observer using the built-in classifier.

pub fn observe<E: Event + ?Sized>(&self, event: &E)

Classify an event and update the counters. Takes &self so the observer can be shared behind an Arc.

pub fn snapshot(&self) -> SchemaObservation

Snapshot the current counts, sorted by descending count then name.

pub fn reset(&self) -> (u64, u64)

Reset the since-last-reset counters (lifetime totals are preserved). Returns the previous (classified, unknown) pair.

pub fn lifetime_classified(&self) -> u64

Lifetime classified total, ignoring resets. Monotonic.

pub fn lifetime_unknown(&self) -> u64

Lifetime unknown total, ignoring resets. Monotonic.