Source code for azure.core.tracing.decorator

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"""The decorator to apply if you want the given function traced."""

import functools

from .common import change_context, get_function_and_class_name
from ..settings import settings

try:
    from typing import TYPE_CHECKING
except ImportError:
    TYPE_CHECKING = False

if TYPE_CHECKING:
    from typing import Callable, Any


[docs]def distributed_trace(func=None, name_of_span=None): # type: (Callable, str) -> Callable[[Any], Any] """Decorator to apply to function to get traced automatically. Span will use the func name or "name_of_span". :param callable func: A function to decorate :param str name_of_span: The span name to replace func name if necessary """ if func is None: return functools.partial(distributed_trace, name_of_span=name_of_span) @functools.wraps(func) def wrapper_use_tracer(*args, **kwargs): # type: (Any, Any) -> Any merge_span = kwargs.pop('merge_span', False) passed_in_parent = kwargs.pop("parent_span", None) span_impl_type = settings.tracing_implementation() if span_impl_type is None: return func(*args, **kwargs) # type: ignore # Merge span is parameter is set, but only if no explicit parent are passed if merge_span and not passed_in_parent: return func(*args, **kwargs) # type: ignore with change_context(passed_in_parent): name = name_of_span or get_function_and_class_name(func, *args) # type: ignore with span_impl_type(name=name): return func(*args, **kwargs) # type: ignore return wrapper_use_tracer