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add on chunk events to genai spans #200

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Merged
merged 3 commits into from
Oct 16, 2025
Merged

add on chunk events to genai spans #200

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279e9ba
add on chunk events to genai spans
dinmukhamedm Oct 15, 2025
fa4a934
small update in doc comment
dinmukhamedm Oct 16, 2025
7945365
wrap add event in try except
dinmukhamedm Oct 16, 2025
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2 changes: 2 additions & 0 deletions src/lmnr/opentelemetry_lib/opentelemetry/instrumentation/google_genai/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -385,6 +385,7 @@ def _build_from_streaming_response(
# this function would not be able to catch the errors, as they are
# raised later, after the generator is returned, and when it is being
# consumed.
span.add_event("llm.content.completion.chunk")
chunk_result = process_stream_chunk(
chunk,
role,
Expand Down Expand Up @@ -435,6 +436,7 @@ async def _abuild_from_streaming_response(
# this function would not be able to catch the errors, as they are
# raised later, after the generator is returned, and when it is being
# consumed.
span.add_event("llm.content.completion.chunk")
chunk_result = process_stream_chunk(
chunk,
role,
Expand Down
4 changes: 4 additions & 0 deletions tests/test_google_genai.py
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Original file line number Diff line number Diff line change
Expand Up @@ -847,8 +847,10 @@ def test_google_genai_streaming(span_exporter: InMemorySpanExporter):
],
)
final_response = ""
chunk_count = 0
for chunk in stream:
final_response += chunk.text or ""
chunk_count += 1

spans = span_exporter.get_finished_spans()
assert len(spans) == 1
Expand Down Expand Up @@ -885,6 +887,8 @@ def test_google_genai_streaming(span_exporter: InMemorySpanExporter):
assert span.attributes["gen_ai.usage.input_tokens"] == 7
assert span.attributes["gen_ai.usage.output_tokens"] == 166
assert span.attributes["llm.usage.total_tokens"] == 175 # 173 + 2 (thinking tokens)
assert len(span.events) == chunk_count
assert all(event.name == "llm.content.completion.chunk" for event in span.events)


@pytest.mark.vcr
Expand Down