Struct FallbackMetrics 

pub struct FallbackMetrics { /* private fields */ }

Fallback routing metrics collector.

Tracks fallback attempts, successes, and exhaustion events for observability and alerting.

Implementations

impl FallbackMetrics

pub fn new() -> Result<Self>

Create new fallback metrics and register with Prometheus.

pub fn record_fallback_attempt( &self, route: &str, from_upstream: &str, to_upstream: &str, reason: &FallbackReason, )

Record a fallback attempt.

Called when fallback routing is triggered from one upstream to another.

pub fn record_fallback_success(&self, route: &str, upstream: &str)

Record a successful response after fallback.

Called when a request succeeds after being routed to a fallback upstream.

pub fn record_fallback_exhausted(&self, route: &str)

Record that all fallback upstreams were exhausted.

Called when no more fallback upstreams are available and the request fails.

pub fn record_model_mapping( &self, route: &str, original_model: &str, mapped_model: &str, )

Record model mapping applied during fallback.