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# Copyright The OpenTelemetry Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import Optional, Union
from opentelemetry.context import Context
from opentelemetry.util.types import Attributes
class Observation:
"""A measurement observed in an asynchronous instrument
Return/yield instances of this class from asynchronous instrument callbacks.
Args:
value: The float or int measured value
attributes: The measurement's attributes
context: The measurement's context
"""
def __init__(
self,
value: Union[int, float],
attributes: Attributes = None,
context: Optional[Context] = None,
) -> None:
self._value = value
self._attributes = attributes
self._context = context
@property
def value(self) -> Union[float, int]:
return self._value
@property
def attributes(self) -> Attributes:
return self._attributes
@property
def context(self) -> Optional[Context]:
return self._context
def __eq__(self, other: object) -> bool:
return (
isinstance(other, Observation)
and self.value == other.value
and self.attributes == other.attributes
and self.context == other.context
)
def __repr__(self) -> str:
return f"Observation(value={self.value}, attributes={self.attributes}, context={self.context})"
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