mirror of
https://github.com/jxxghp/MoviePilot.git
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50 lines
1.9 KiB
Python
50 lines
1.9 KiB
Python
"""可选 OpenTelemetry metrics adapter。"""
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from __future__ import annotations
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import importlib
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import os
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from typing import Any, Mapping
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from app.runtime.observability import MetricKind, MetricSpec, NoopObservationPort, ObservationPort
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class OpenTelemetryObservationPort:
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"""把内部指标合同映射到可选安装的 OpenTelemetry Metrics API。"""
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def __init__(self, meter: Any) -> None:
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"""保存 meter，并按名称惰性创建 instrument。"""
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self._meter = meter
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self._instruments: dict[str, Any] = {}
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def record(self, spec: MetricSpec, value: float, labels: Mapping[str, str]) -> None:
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"""按合同类型使用 OTel counter、histogram 或 up/down counter。"""
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instrument = self._instruments.get(spec.name)
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if instrument is None:
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instrument = self._create_instrument(spec)
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self._instruments[spec.name] = instrument
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if spec.kind == MetricKind.HISTOGRAM:
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instrument.record(value, attributes=dict(labels))
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else:
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instrument.add(value, attributes=dict(labels))
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def _create_instrument(self, spec: MetricSpec) -> Any:
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"""为内部指标类型创建对应 OTel instrument。"""
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normalized = spec.name.replace(".", "_")
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if spec.kind == MetricKind.HISTOGRAM:
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return self._meter.create_histogram(normalized)
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if spec.kind == MetricKind.COUNTER:
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return self._meter.create_counter(normalized)
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return self._meter.create_up_down_counter(normalized)
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def build_observation_port() -> ObservationPort:
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"""仅在显式启用且 API 可导入时创建 OTel adapter，否则返回 no-op。"""
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if os.getenv("MOVIEPILOT_OTEL_METRICS") != "1":
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return NoopObservationPort()
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try:
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metrics = importlib.import_module("opentelemetry.metrics")
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except ImportError:
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return NoopObservationPort()
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return OpenTelemetryObservationPort(metrics.get_meter("moviepilot"))
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