No way to access trace id/span id

[AudriusButkevicius]

As it stands, the interfaces do not provide a way to access the trace id, nor the span id.

Jaeger client exposes span.trace_id and span.span_id, but if the tracer is not initialised, that obviously blows up, as the noop span doesn't have those attributes, requiring people to do hasattr checks.

It's useful to log the trace id/span id of the request being started, which can later be used to debug issues with the request somewhere downstream.

[yurishkuro]

This was never implemented in Python opentracing/specification#123

[AudriusButkevicius]

What's the reason behind that, other than "nobody got to it", and what would the implementation look like?

[ibnu-assaumi]

try this way:

from opentracing.span import Span
from opentracing.propagation import Format

def get_trace_id(span:Span=None):
    if span is None:
        return ""
    
    try:
        carrier = {}
        span.tracer.inject(
            span_context=span.context,
            format=Format.TEXT_MAP,
            carrier=carrier
        )        
        return '{}'.format(carrier['uber-trace-id']).split(':')[0]
    except Exception as e:
        return ""