Struct NoopTracer 

pub struct NoopTracer;

Zero-cost tracer that discards all events.

This is the default tracer for QueryRuntime.

Trait Implementations

impl Tracer for NoopTracer

fn new_span_id(&self) -> SpanId

Generate a new unique span ID.

fn on_query_start(&self, _span_id: SpanId, _query: TracerQueryKey)

Called when a query execution starts.

fn on_cache_check(&self, _span_id: SpanId, _query: TracerQueryKey, _valid: bool)

Called when cache validity is checked.

fn on_query_end( &self, _span_id: SpanId, _query: TracerQueryKey, _result: ExecutionResult, )

Called when a query execution ends.

fn on_dependency_registered( &self, _span_id: SpanId, _parent: TracerQueryKey, _dependency: TracerQueryKey, )

Called when a query dependency is registered during execution.

fn on_asset_dependency_registered( &self, _span_id: SpanId, _parent: TracerQueryKey, _asset: TracerAssetKey, )

Called when an asset dependency is registered during execution.

fn on_early_cutoff_check( &self, _span_id: SpanId, _query: TracerQueryKey, _output_changed: bool, )

Called when early cutoff comparison is performed.

fn on_asset_requested(&self, _asset: TracerAssetKey, _state: TracerAssetState)

Called when an asset is requested.

fn on_asset_resolved(&self, _asset: TracerAssetKey, _changed: bool)

Called when an asset is resolved with a value.

fn on_asset_invalidated(&self, _asset: TracerAssetKey)

Called when an asset is invalidated.

fn on_query_invalidated( &self, _query: TracerQueryKey, _reason: InvalidationReason, )

Called when a query is invalidated.

fn on_cycle_detected(&self, _path: Vec<TracerQueryKey>)

Called when a dependency cycle is detected.

fn on_missing_dependency( &self, _query: TracerQueryKey, _dependency_description: String, )

Called when a missing dependency error occurs.