Refactor TracedConnectionProxy #1097
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Several issues have arisen from this bugfix, reverting here until a better solution can be found. Fixes open-telemetry#1658
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Several issues have arisen from this bugfix, reverting here until a better solution can be found. Fixes open-telemetry#1658
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Several issues have arisen from this bugfix, reverting here until a better solution can be found. Fixes open-telemetry#1658
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…/github.com/shalevr/opentelemetry-python-contrib into Change-metrics-tests-to-work-with-test_base * 'Change-metrics-tests-to-work-with-test_base' of https://github.com/shalevr/opentelemetry-python-contrib: Fix issue with Flask instrumentation when a request spawn children threads and copies the request context (open-telemetry#1654) Add connection attributes to sqlalchemy connect span (open-telemetry#1608) Add boto3sqs to docs (open-telemetry#1666) Audit and test opentelemetry-instrumentation-elasticsearch NoOpTracer… (open-telemetry#1616) Copy change log updates from release/v1.16.x-0.37bx (open-telemetry#1683) Update version to 1.17.0.dev/0.38b0.dev (open-telemetry#1677) Fix CI Failure (open-telemetry#1680) Add better debugging if hatch subprocess fails (open-telemetry#1672) Add confluent kafka docs (open-telemetry#1668) Support aio_pika 9 (open-telemetry#1670) Audit and test opentelemetry-instrumentation-wsgi NoOpTracerProvider (open-telemetry#1610) bot (open-telemetry#1667) Add commit method for ConfluentKafkaInstrumentor's ProxiedConsumer (open-telemetry#1656) Revert open-telemetry#1097 (open-telemetry#1660) Audit and test opentelemetry-instrumentation-django NoOpTracerProvider (open-telemetry#1611) Audit and test opentelemetry-instrumentation-aiohttp-client NoOpTrace… (open-telemetry#1612) Audit and test opentelemetry-instrumentation-flask NoOpTracerProvider (open-telemetry#1614) Audit and test opentelemetry-instrumentation-dbapi NoOpTracerProvider (open-telemetry#1607)
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Fixes #1077
Fixing this issue is a bit complicated:
Here it is suggested that we may monkey patch the
register_typesfunction instead of wrapping the connection/cursor. The problem with this approach is that it may be necessary to do this kind of patching in private modules of the Psycopg2 library that may change paths unexpectedly (since they are private), causing our instrumentation to be breakable with any release of Psycopg2.@owais suggests here that we should patch the classes themselves instead of wrapping to avoid problems with type checking. I understand the point but I think this approach also has the problem that it may require importing from private modules to patch effectively.
The particular issue here happens because
PyObject_TypeCheckis used in Psycopg2register_typesand this type checking implemented in C is more restrictive thanisinstance(wrapt.ObjectProxyobjects passes anisinstancecheck against the type of the wrapped object).The solution implemented here is able to pass the
PyObject_TypeCheckbecause the connection created dynamically inherits from the class of the original connection, somethingwrapt.ObjectProxydoes not.