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[WIP] add metric to count responses per endpoint #3175

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[WIP] add metric to count responses per endpoint #3175

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11 changes: 11 additions & 0 deletions ...ion/opentelemetry-instrumentation-wsgi/src/opentelemetry/instrumentation/wsgi/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -583,6 +583,11 @@ def __init__(
unit="{request}",
description="Number of active HTTP server requests.",
)
self.response_counter = self.meter.create_counter(
name="wsgi_response_count",
unit="responses",
description="Counter for responses per endpoint",
)
self.request_hook = request_hook
self.response_hook = response_hook
self._sem_conv_opt_in_mode = sem_conv_opt_in_mode
Expand All @@ -594,9 +599,12 @@ def _create_start_response(
response_hook,
duration_attrs,
sem_conv_opt_in_mode,
response_counter,
endpoint_name
):
@functools.wraps(start_response)
def _start_response(status, response_headers, *args, **kwargs):
response_counter.add(1, {"status_code": status, "view": endpoint_name})
add_response_attributes(
span,
status,
Expand Down Expand Up @@ -658,12 +666,15 @@ def __call__(self, environ, start_response):
self.active_requests_counter.add(1, active_requests_count_attrs)
try:
with trace.use_span(span):
endpoint_name = environ.get("PATH_INFO")
start_response = self._create_start_response(
span,
start_response,
response_hook,
req_attrs,
self._sem_conv_opt_in_mode,
self.response_counter,
endpoint_name
)
iterable = self.wsgi(environ, start_response)
return _end_span_after_iterating(iterable, span, token)
Expand Down
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