Dispatcher handles the GET requests for metrics endpoint.

NewMetrics returns a helper that exposes the metrics through sink to instrument the application.

NewNoopMetrics return a helper that implements the Metrics interface, but does nothing.

NewPrometheusSink returns a sink for exposing Prometheus metrics.

NewTimer wraps the HistogramVec and used to track amount of time passed since the Timer was created.

Cache provides generic metrics for caches.

Core is a set of metrics for the core functionality.

Counter represents a single numerical value that only goes up.

DigestCache is a set of metrics for the digest cache subsystem.

Metrics is a set of all metrics that can be provided.

Observer captures individual observations.

Pullthrough is a set of metrics for the pullthrough subsystem.

Sink provides an interface for exposing metrics.

Storage is a set of metrics for the storage subsystem.

Timer is a helper type to time functions.