Merge branch 'otel_publish' of https://github.com/googleapis/python-pubsub into otel_publish

Author: gcf-owl-bot[bot]

google/cloud/pubsub_v1/publisher/client.py

@@ -153,6 +153,22 @@ def __init__(
 
  # The object controlling the message publishing flow
  self._flow_controller = FlowController(self.publisher_options.flow_control)
+ 
+ self._open_telemetry_enabled = (
+ self.publisher_options.enable_open_telemetry_tracing
+ )
+ # OpenTelemetry features used by the library are not supported in Python versions <= 3.7.
+ # Refer https://github.com/open-telemetry/opentelemetry-python/issues/3993#issuecomment-2211976389
+ if (
+ self.publisher_options.enable_open_telemetry_tracing
+ and sys.version_info.major == 3
+ and sys.version_info.minor < 8
+ ):
+ warnings.warn(
+ message="Open Telemetry for Python version 3.7 or lower is not supported. Disabling Open Telemetry tracing.",
+ category=RuntimeWarning,
+ )
+ self._open_telemetry_enabled = False
 
  self._open_telemetry_enabled = (
  self.publisher_options.enable_open_telemetry_tracing