tracing-distributed

This crate provides:

• TelemetryLayer, a generic tracing layer that handles publishing spans and events to arbitrary backends
• Utilities for implementing distributed tracing for arbitrary backends

As a tracing layer, TelemetryLayer can be composed with other layers to provide stdout logging, filtering, etc.

This crate is primarily intended to be used by people implementing their own backends. A concrete implementation using honeycomb.io as a backend is available in the tracing-honeycomb crate.

Implementation note

TelemetryLayer relies on an instance of the Telemetry trait. Implementors of this trait must provide three associated types:

• TraceId, a globally unique identifier that associates spans and events with a distributed trace
• SpanId, an identifier that uniquely identifies spans within a trace
• Visitor, a type that is used to record values associated with a given span or event.