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from __future__ import annotations
import abc
import contextvars
from typing import Any, Generic, TypeVar
from typing_extensions import TypedDict
from ..logger import logger
from . import util
from .processor_interface import TracingProcessor
from .scope import Scope
from .span_data import SpanData
TSpanData = TypeVar("TSpanData", bound=SpanData)
class SpanError(TypedDict):
message: str
data: dict[str, Any] | None
class Span(abc.ABC, Generic[TSpanData]):
@property
@abc.abstractmethod
def trace_id(self) -> str:
pass
@property
@abc.abstractmethod
def span_id(self) -> str:
pass
@property
@abc.abstractmethod
def span_data(self) -> TSpanData:
pass
@abc.abstractmethod
def start(self, mark_as_current: bool = False):
"""
Start the span.
Args:
mark_as_current: If true, the span will be marked as the current span.
"""
pass
@abc.abstractmethod
def finish(self, reset_current: bool = False) -> None:
"""
Finish the span.
Args:
reset_current: If true, the span will be reset as the current span.
"""
pass
@abc.abstractmethod
def __enter__(self) -> Span[TSpanData]:
pass
@abc.abstractmethod
def __exit__(self, exc_type, exc_val, exc_tb):
pass
@property
@abc.abstractmethod
def parent_id(self) -> str | None:
pass
@abc.abstractmethod
def set_error(self, error: SpanError) -> None:
pass
@property
@abc.abstractmethod
def error(self) -> SpanError | None:
pass
@abc.abstractmethod
def export(self) -> dict[str, Any] | None:
pass
@property
@abc.abstractmethod
def started_at(self) -> str | None:
pass
@property
@abc.abstractmethod
def ended_at(self) -> str | None:
pass
class NoOpSpan(Span[TSpanData]):
__slots__ = ("_span_data", "_prev_span_token")
def __init__(self, span_data: TSpanData):
self._span_data = span_data
self._prev_span_token: contextvars.Token[Span[TSpanData] | None] | None = None
@property
def trace_id(self) -> str:
return "no-op"
@property
def span_id(self) -> str:
return "no-op"
@property
def span_data(self) -> TSpanData:
return self._span_data
@property
def parent_id(self) -> str | None:
return None
def start(self, mark_as_current: bool = False):
if mark_as_current:
self._prev_span_token = Scope.set_current_span(self)
def finish(self, reset_current: bool = False) -> None:
if reset_current and self._prev_span_token is not None:
Scope.reset_current_span(self._prev_span_token)
self._prev_span_token = None
def __enter__(self) -> Span[TSpanData]:
self.start(mark_as_current=True)
return self
def __exit__(self, exc_type, exc_val, exc_tb):
reset_current = True
if exc_type is GeneratorExit:
logger.debug("GeneratorExit, skipping span reset")
reset_current = False
self.finish(reset_current=reset_current)
def set_error(self, error: SpanError) -> None:
pass
@property
def error(self) -> SpanError | None:
return None
def export(self) -> dict[str, Any] | None:
return None
@property
def started_at(self) -> str | None:
return None
@property
def ended_at(self) -> str | None:
return None
class SpanImpl(Span[TSpanData]):
__slots__ = (
"_trace_id",
"_span_id",
"_parent_id",
"_started_at",
"_ended_at",
"_error",
"_prev_span_token",
"_processor",
"_span_data",
)
def __init__(
self,
trace_id: str,
span_id: str | None,
parent_id: str | None,
processor: TracingProcessor,
span_data: TSpanData,
):
self._trace_id = trace_id
self._span_id = span_id or util.gen_span_id()
self._parent_id = parent_id
self._started_at: str | None = None
self._ended_at: str | None = None
self._processor = processor
self._error: SpanError | None = None
self._prev_span_token: contextvars.Token[Span[TSpanData] | None] | None = None
self._span_data = span_data
@property
def trace_id(self) -> str:
return self._trace_id
@property
def span_id(self) -> str:
return self._span_id
@property
def span_data(self) -> TSpanData:
return self._span_data
@property
def parent_id(self) -> str | None:
return self._parent_id
def start(self, mark_as_current: bool = False):
if self.started_at is not None:
logger.warning("Span already started")
return
self._started_at = util.time_iso()
self._processor.on_span_start(self)
if mark_as_current:
self._prev_span_token = Scope.set_current_span(self)
def finish(self, reset_current: bool = False) -> None:
if self.ended_at is not None:
logger.warning("Span already finished")
return
self._ended_at = util.time_iso()
self._processor.on_span_end(self)
if reset_current and self._prev_span_token is not None:
Scope.reset_current_span(self._prev_span_token)
self._prev_span_token = None
def __enter__(self) -> Span[TSpanData]:
self.start(mark_as_current=True)
return self
def __exit__(self, exc_type, exc_val, exc_tb):
reset_current = True
if exc_type is GeneratorExit:
logger.debug("GeneratorExit, skipping span reset")
reset_current = False
self.finish(reset_current=reset_current)
def set_error(self, error: SpanError) -> None:
self._error = error
@property
def error(self) -> SpanError | None:
return self._error
@property
def started_at(self) -> str | None:
return self._started_at
@property
def ended_at(self) -> str | None:
return self._ended_at
def export(self) -> dict[str, Any] | None:
return {
"object": "trace.span",
"id": self.span_id,
"trace_id": self.trace_id,
"parent_id": self._parent_id,
"started_at": self._started_at,
"ended_at": self._ended_at,
"span_data": self.span_data.export(),
"error": self._error,
}
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