baggage property

Map baggage

Baggage is a set of key:value pairs stored in a Span (and its SpanContext) and propagated in-band to all child Spans and their SpanContexts: in this way, the “Baggage” travels with the trace, hence the name. Given a full-stack OpenTracing integration, Baggage enables powerful functionality by transparently propagating arbitrary application data: for example, an end-user id may be added as a Baggage item in a mobile app, propagate (via the distributed tracing machinery) into the depths of a storage system, and recovered at the bottom of the stack to identify a particularly expensive SQL query.

Implementation

Map<dynamic, dynamic> get baggage => _baggage;