Propagator - TextFormatPropagator

class opencensus.trace.propagation.text_format.TextFormatPropagator

Bases: object

This class provides the basic utilities for extracting the trace information from a carrier which is a dict to form a SpanContext. And generating a dict using the provided SpanContext.

from_carrier(carrier)

Generate a SpanContext object using the information in the carrier.

Parameters

carrier (dict) -- The carrier which has the trace_id, span_id, options information for creating a SpanContext.

Return type

SpanContext

Returns

SpanContext generated from the carrier.

to_carrier(span_context, carrier)

Inject the SpanContext fields to carrier dict.

Parameters

• span_context (SpanContext) -- SpanContext object.

• carrier (dict) -- The carrier which holds the trace_id, span_id, options information from a SpanContext.

Return type

dict

Returns

The carrier which holds the span context information.