Crate futures_zipkin

Futures support for Zipkin tracing.

The Tracer type uses thread local storage to track the current span. This works well in blocking applications where a unit of work "owns" a thread while it's running. However, it is less appropriate for futures-based applications where multiple distinct futures are being evaluated on the same thread in an interleaved fashion.

This crate provides a Spanned wrapper type which ensures that a trace context is registered with a Tracer while a futures type is processing. It can wrap Futures, Sinks, and Streams.

Structs

Spanned

A wrapper type which ensures that a Zipkin trace context is active while its inner value runs.