structure saas with tools
This commit is contained in:
Davidson Gomes
@@ -0,0 +1,530 @@
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# Copyright The OpenTelemetry Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# pylint: disable=too-many-ancestors
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from abc import ABC, abstractmethod
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from dataclasses import dataclass
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from logging import getLogger
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from re import compile as re_compile
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from typing import (
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Callable,
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Dict,
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Generator,
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Generic,
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Iterable,
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Optional,
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Sequence,
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TypeVar,
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Union,
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)
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# pylint: disable=unused-import; needed for typing and sphinx
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from opentelemetry import metrics
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from opentelemetry.context import Context
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from opentelemetry.metrics._internal.observation import Observation
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from opentelemetry.util.types import (
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Attributes,
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)
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_logger = getLogger(__name__)
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_name_regex = re_compile(r"[a-zA-Z][-_./a-zA-Z0-9]{0,254}")
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_unit_regex = re_compile(r"[\x00-\x7F]{0,63}")
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@dataclass(frozen=True)
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class _MetricsHistogramAdvisory:
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explicit_bucket_boundaries: Optional[Sequence[float]] = None
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@dataclass(frozen=True)
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class CallbackOptions:
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"""Options for the callback
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Args:
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timeout_millis: Timeout for the callback's execution. If the callback does asynchronous
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work (e.g. HTTP requests), it should respect this timeout.
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"""
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timeout_millis: float = 10_000
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InstrumentT = TypeVar("InstrumentT", bound="Instrument")
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# pylint: disable=invalid-name
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CallbackT = Union[
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Callable[[CallbackOptions], Iterable[Observation]],
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Generator[Iterable[Observation], CallbackOptions, None],
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]
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class Instrument(ABC):
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"""Abstract class that serves as base for all instruments."""
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@abstractmethod
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def __init__(
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self,
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name: str,
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unit: str = "",
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description: str = "",
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) -> None:
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pass
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@staticmethod
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def _check_name_unit_description(
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name: str, unit: str, description: str
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) -> Dict[str, Optional[str]]:
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"""
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Checks the following instrument name, unit and description for
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compliance with the spec.
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Returns a dict with keys "name", "unit" and "description", the
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corresponding values will be the checked strings or `None` if the value
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is invalid. If valid, the checked strings should be used instead of the
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original values.
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"""
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result: Dict[str, Optional[str]] = {}
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if _name_regex.fullmatch(name) is not None:
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result["name"] = name
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else:
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result["name"] = None
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if unit is None:
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unit = ""
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if _unit_regex.fullmatch(unit) is not None:
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result["unit"] = unit
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else:
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result["unit"] = None
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if description is None:
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result["description"] = ""
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else:
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result["description"] = description
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return result
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class _ProxyInstrument(ABC, Generic[InstrumentT]):
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def __init__(
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self,
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name: str,
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unit: str = "",
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description: str = "",
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) -> None:
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self._name = name
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self._unit = unit
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self._description = description
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self._real_instrument: Optional[InstrumentT] = None
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def on_meter_set(self, meter: "metrics.Meter") -> None:
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"""Called when a real meter is set on the creating _ProxyMeter"""
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# We don't need any locking on proxy instruments because it's OK if some
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# measurements get dropped while a real backing instrument is being
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# created.
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self._real_instrument = self._create_real_instrument(meter)
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@abstractmethod
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def _create_real_instrument(self, meter: "metrics.Meter") -> InstrumentT:
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"""Create an instance of the real instrument. Implement this."""
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class _ProxyAsynchronousInstrument(_ProxyInstrument[InstrumentT]):
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def __init__(
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self,
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name: str,
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callbacks: Optional[Sequence[CallbackT]] = None,
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unit: str = "",
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description: str = "",
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) -> None:
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super().__init__(name, unit, description)
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self._callbacks = callbacks
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class Synchronous(Instrument):
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"""Base class for all synchronous instruments"""
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class Asynchronous(Instrument):
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"""Base class for all asynchronous instruments"""
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@abstractmethod
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def __init__(
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self,
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name: str,
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callbacks: Optional[Sequence[CallbackT]] = None,
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unit: str = "",
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description: str = "",
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) -> None:
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super().__init__(name, unit=unit, description=description)
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class Counter(Synchronous):
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"""A Counter is a synchronous `Instrument` which supports non-negative increments."""
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@abstractmethod
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def add(
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self,
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amount: Union[int, float],
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attributes: Optional[Attributes] = None,
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context: Optional[Context] = None,
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) -> None:
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pass
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class NoOpCounter(Counter):
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"""No-op implementation of `Counter`."""
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def __init__(
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self,
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name: str,
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unit: str = "",
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description: str = "",
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) -> None:
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super().__init__(name, unit=unit, description=description)
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def add(
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self,
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amount: Union[int, float],
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attributes: Optional[Attributes] = None,
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context: Optional[Context] = None,
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) -> None:
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return super().add(amount, attributes=attributes, context=context)
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class _ProxyCounter(_ProxyInstrument[Counter], Counter):
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def add(
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self,
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amount: Union[int, float],
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attributes: Optional[Attributes] = None,
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context: Optional[Context] = None,
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) -> None:
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if self._real_instrument:
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self._real_instrument.add(amount, attributes, context)
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def _create_real_instrument(self, meter: "metrics.Meter") -> Counter:
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return meter.create_counter(
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self._name,
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self._unit,
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self._description,
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)
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class UpDownCounter(Synchronous):
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"""An UpDownCounter is a synchronous `Instrument` which supports increments and decrements."""
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@abstractmethod
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def add(
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self,
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amount: Union[int, float],
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attributes: Optional[Attributes] = None,
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context: Optional[Context] = None,
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) -> None:
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pass
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class NoOpUpDownCounter(UpDownCounter):
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"""No-op implementation of `UpDownCounter`."""
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def __init__(
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self,
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name: str,
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unit: str = "",
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description: str = "",
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) -> None:
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super().__init__(name, unit=unit, description=description)
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def add(
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self,
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amount: Union[int, float],
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attributes: Optional[Attributes] = None,
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context: Optional[Context] = None,
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) -> None:
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return super().add(amount, attributes=attributes, context=context)
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class _ProxyUpDownCounter(_ProxyInstrument[UpDownCounter], UpDownCounter):
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def add(
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self,
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amount: Union[int, float],
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attributes: Optional[Attributes] = None,
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context: Optional[Context] = None,
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) -> None:
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if self._real_instrument:
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self._real_instrument.add(amount, attributes, context)
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def _create_real_instrument(self, meter: "metrics.Meter") -> UpDownCounter:
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return meter.create_up_down_counter(
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self._name,
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self._unit,
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self._description,
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)
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class ObservableCounter(Asynchronous):
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"""An ObservableCounter is an asynchronous `Instrument` which reports monotonically
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increasing value(s) when the instrument is being observed.
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"""
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class NoOpObservableCounter(ObservableCounter):
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"""No-op implementation of `ObservableCounter`."""
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def __init__(
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self,
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name: str,
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callbacks: Optional[Sequence[CallbackT]] = None,
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unit: str = "",
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description: str = "",
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) -> None:
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super().__init__(
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name,
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callbacks,
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unit=unit,
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description=description,
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)
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class _ProxyObservableCounter(
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_ProxyAsynchronousInstrument[ObservableCounter], ObservableCounter
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):
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def _create_real_instrument(
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self, meter: "metrics.Meter"
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) -> ObservableCounter:
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return meter.create_observable_counter(
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self._name,
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self._callbacks,
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self._unit,
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self._description,
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)
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class ObservableUpDownCounter(Asynchronous):
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"""An ObservableUpDownCounter is an asynchronous `Instrument` which reports additive value(s) (e.g.
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the process heap size - it makes sense to report the heap size from multiple processes and sum them
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up, so we get the total heap usage) when the instrument is being observed.
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"""
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class NoOpObservableUpDownCounter(ObservableUpDownCounter):
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"""No-op implementation of `ObservableUpDownCounter`."""
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def __init__(
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self,
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name: str,
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callbacks: Optional[Sequence[CallbackT]] = None,
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unit: str = "",
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description: str = "",
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) -> None:
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super().__init__(
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name,
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callbacks,
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unit=unit,
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description=description,
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)
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class _ProxyObservableUpDownCounter(
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_ProxyAsynchronousInstrument[ObservableUpDownCounter],
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ObservableUpDownCounter,
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):
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def _create_real_instrument(
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self, meter: "metrics.Meter"
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) -> ObservableUpDownCounter:
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return meter.create_observable_up_down_counter(
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self._name,
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self._callbacks,
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self._unit,
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self._description,
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)
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class Histogram(Synchronous):
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"""Histogram is a synchronous `Instrument` which can be used to report arbitrary values
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that are likely to be statistically meaningful. It is intended for statistics such as
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histograms, summaries, and percentile.
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"""
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@abstractmethod
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def __init__(
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self,
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name: str,
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unit: str = "",
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description: str = "",
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explicit_bucket_boundaries_advisory: Optional[Sequence[float]] = None,
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) -> None:
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pass
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@abstractmethod
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def record(
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self,
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amount: Union[int, float],
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attributes: Optional[Attributes] = None,
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context: Optional[Context] = None,
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) -> None:
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pass
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class NoOpHistogram(Histogram):
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"""No-op implementation of `Histogram`."""
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def __init__(
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self,
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name: str,
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unit: str = "",
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description: str = "",
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explicit_bucket_boundaries_advisory: Optional[Sequence[float]] = None,
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) -> None:
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super().__init__(
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name,
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unit=unit,
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description=description,
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explicit_bucket_boundaries_advisory=explicit_bucket_boundaries_advisory,
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)
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def record(
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self,
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amount: Union[int, float],
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attributes: Optional[Attributes] = None,
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context: Optional[Context] = None,
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) -> None:
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return super().record(amount, attributes=attributes, context=context)
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class _ProxyHistogram(_ProxyInstrument[Histogram], Histogram):
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def __init__(
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self,
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name: str,
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unit: str = "",
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description: str = "",
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explicit_bucket_boundaries_advisory: Optional[Sequence[float]] = None,
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) -> None:
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super().__init__(name, unit=unit, description=description)
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self._explicit_bucket_boundaries_advisory = (
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explicit_bucket_boundaries_advisory
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)
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def record(
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self,
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amount: Union[int, float],
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attributes: Optional[Attributes] = None,
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context: Optional[Context] = None,
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) -> None:
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if self._real_instrument:
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self._real_instrument.record(amount, attributes, context)
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def _create_real_instrument(self, meter: "metrics.Meter") -> Histogram:
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return meter.create_histogram(
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self._name,
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self._unit,
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self._description,
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explicit_bucket_boundaries_advisory=self._explicit_bucket_boundaries_advisory,
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)
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class ObservableGauge(Asynchronous):
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"""Asynchronous Gauge is an asynchronous `Instrument` which reports non-additive value(s) (e.g.
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the room temperature - it makes no sense to report the temperature value from multiple rooms
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and sum them up) when the instrument is being observed.
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"""
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class NoOpObservableGauge(ObservableGauge):
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"""No-op implementation of `ObservableGauge`."""
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def __init__(
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self,
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name: str,
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callbacks: Optional[Sequence[CallbackT]] = None,
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unit: str = "",
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description: str = "",
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) -> None:
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super().__init__(
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name,
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callbacks,
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unit=unit,
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description=description,
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)
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class _ProxyObservableGauge(
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_ProxyAsynchronousInstrument[ObservableGauge],
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ObservableGauge,
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):
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def _create_real_instrument(
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self, meter: "metrics.Meter"
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) -> ObservableGauge:
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return meter.create_observable_gauge(
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self._name,
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self._callbacks,
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self._unit,
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self._description,
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)
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class Gauge(Synchronous):
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"""A Gauge is a synchronous `Instrument` which can be used to record non-additive values as they occur."""
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@abstractmethod
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def set(
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self,
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amount: Union[int, float],
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attributes: Optional[Attributes] = None,
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context: Optional[Context] = None,
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) -> None:
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pass
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class NoOpGauge(Gauge):
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"""No-op implementation of ``Gauge``."""
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def __init__(
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self,
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name: str,
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unit: str = "",
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description: str = "",
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) -> None:
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super().__init__(name, unit=unit, description=description)
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def set(
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self,
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amount: Union[int, float],
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attributes: Optional[Attributes] = None,
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context: Optional[Context] = None,
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) -> None:
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return super().set(amount, attributes=attributes, context=context)
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class _ProxyGauge(
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_ProxyInstrument[Gauge],
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Gauge,
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):
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def set(
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self,
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amount: Union[int, float],
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attributes: Optional[Attributes] = None,
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context: Optional[Context] = None,
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) -> None:
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if self._real_instrument:
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self._real_instrument.set(amount, attributes, context)
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def _create_real_instrument(self, meter: "metrics.Meter") -> Gauge:
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return meter.create_gauge(
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self._name,
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self._unit,
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self._description,
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)
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