Struct Metrics 

pub struct Metrics { /* private fields */ }

Implementations

impl Metrics

pub fn new() -> Result<(Self, Registry)>

Prometheus-only (unchanged behaviour). Retained for existing callers.

pub fn with_otlp( otlp_endpoint: Option<&str>, service_name: &str, ) -> Result<(Self, Registry)>

Prometheus reader (always, exported on :9090) plus an OTLP/HTTP PeriodicReader when otlp_endpoint is Some. service_name is attached as the service.name resource attribute so OTLP series carry e.g. service_name=sandbox-broker.

otlp_endpoint is a base collector URL like http://host:4318; the /v1/metrics signal path is appended here (a programmatically-supplied endpoint is used verbatim by opentelemetry-otlp 0.32, so we must append the path ourselves).

pub fn meter(&self) -> Meter

A meter on the SAME provider (so downstream crates such as synapse-mcp build instruments that share this provider’s OTLP + Prometheus readers and single service.name resource).

pub fn record( &self, route: &str, method: &str, status: u16, outcome: &str, secs: f64, )

pub fn upstream_error(&self, route: &str, reason: &str)

pub fn transform_error(&self, route: &str, transform: &str)