def _translate_span(self, span: ReadableSpan) -> TCollector.Span:
ctx = span.get_span_context()
trace_id = ctx.trace_id
span_id = ctx.span_id
start_time_us = _nsec_to_usec_round(span.start_time)
duration_us = _nsec_to_usec_round(span.end_time - span.start_time)
parent_id = span.parent.span_id if span.parent else 0
tags = self._extract_tags(span)
refs = self._extract_refs(span)
logs = self._extract_logs(span)
flags = int(ctx.trace_flags)
jaeger_span = TCollector.Span(
traceIdHigh=_get_trace_id_high(trace_id),
traceIdLow=_get_trace_id_low(trace_id),
spanId=_convert_int_to_i64(span_id),
operationName=span.name,
startTime=start_time_us,
duration=duration_us,
tags=tags,
logs=logs,
references=refs,
flags=flags,
parentSpanId=_convert_int_to_i64(parent_id),
)
return jaeger_span
def _extract_logs(
self, span: ReadableSpan) -> Optional[Sequence[TCollector.Log]]:
"""Returns jaeger logs if events exists, otherwise None.
Args:
span: span to extract logs
"""
if not span.events:
return None
logs = []
for event in span.events:
fields = []
for key, value in event.attributes.items():
tag = _translate_attribute(key, value)
if tag:
fields.append(tag)
fields.append(
TCollector.Tag(
key="message",
vType=TCollector.TagType.STRING,
vStr=event.name,
))
event_timestamp_us = _nsec_to_usec_round(event.timestamp)
logs.append(
TCollector.Log(timestamp=int(event_timestamp_us),
fields=fields))
return logs