# 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 logging import getLogger
from re import compile
from types import MappingProxyType
from typing import Mapping, Optional
from opentelemetry.context import create_key, get_value, set_value
from opentelemetry.context.context import Context
from opentelemetry.util.re import (
_BAGGAGE_PROPERTY_FORMAT,
_KEY_FORMAT,
_VALUE_FORMAT,
)
_BAGGAGE_KEY = create_key("baggage")
_logger = getLogger(__name__)
_KEY_PATTERN = compile(_KEY_FORMAT)
_VALUE_PATTERN = compile(_VALUE_FORMAT)
_PROPERT_PATTERN = compile(_BAGGAGE_PROPERTY_FORMAT)
[docs]def get_all(
context: Optional[Context] = None,
) -> Mapping[str, object]:
"""Returns the name/value pairs in the Baggage
Args:
context: The Context to use. If not set, uses current Context
Returns:
The name/value pairs in the Baggage
"""
baggage = get_value(_BAGGAGE_KEY, context=context)
if isinstance(baggage, dict):
return MappingProxyType(baggage)
return MappingProxyType({})
[docs]def get_baggage(
name: str, context: Optional[Context] = None
) -> Optional[object]:
"""Provides access to the value for a name/value pair in the
Baggage
Args:
name: The name of the value to retrieve
context: The Context to use. If not set, uses current Context
Returns:
The value associated with the given name, or null if the given name is
not present.
"""
return get_all(context=context).get(name)
[docs]def set_baggage(
name: str, value: object, context: Optional[Context] = None
) -> Context:
"""Sets a value in the Baggage
Args:
name: The name of the value to set
value: The value to set
context: The Context to use. If not set, uses current Context
Returns:
A Context with the value updated
"""
baggage = dict(get_all(context=context))
baggage[name] = value
return set_value(_BAGGAGE_KEY, baggage, context=context)
[docs]def remove_baggage(name: str, context: Optional[Context] = None) -> Context:
"""Removes a value from the Baggage
Args:
name: The name of the value to remove
context: The Context to use. If not set, uses current Context
Returns:
A Context with the name/value removed
"""
baggage = dict(get_all(context=context))
baggage.pop(name, None)
return set_value(_BAGGAGE_KEY, baggage, context=context)
[docs]def clear(context: Optional[Context] = None) -> Context:
"""Removes all values from the Baggage
Args:
context: The Context to use. If not set, uses current Context
Returns:
A Context with all baggage entries removed
"""
return set_value(_BAGGAGE_KEY, {}, context=context)
def _is_valid_key(name: str) -> bool:
return _KEY_PATTERN.fullmatch(str(name)) is not None
def _is_valid_value(value: object) -> bool:
parts = str(value).split(";")
is_valid_value = _VALUE_PATTERN.fullmatch(parts[0]) is not None
if len(parts) > 1: # one or more properties metadata
for property in parts[1:]:
if _PROPERT_PATTERN.fullmatch(property) is None:
is_valid_value = False
break
return is_valid_value
def _is_valid_pair(key: str, value: str) -> bool:
return _is_valid_key(key) and _is_valid_value(value)