Tracing & observability - FastQL

Both tracers are schema extensions, so they attach with Schema(extensions=[...]) and add no cost when absent.

Apollo tracing

ApolloTracingExtension merges per-operation and per-field timing into ExecutionResult.extensions["tracing"].

from fastql import Schema
from fastql.tracing import ApolloTracingExtension

schema = Schema(query=Query, extensions=[ApolloTracingExtension()])

OpenTelemetry

OpenTelemetryExtension emits an operation span and a child span per resolved field. It lives behind the [opentelemetry] extra and imports the dependency lazily.

pip install mygenx-fastql[opentelemetry]

from fastql.opentelemetry import OpenTelemetryExtension

schema = Schema(query=Query, extensions=[OpenTelemetryExtension()])

Pass a custom tracer= to integrate with an existing provider. Without the extra installed, instantiating the extension raises an ImportError naming mygenx-fastql[opentelemetry]; the core itself never imports OpenTelemetry.