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109 lines
3.1 KiB
Python
109 lines
3.1 KiB
Python
"""Process-log event capture for user-visible operational logs."""
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from __future__ import annotations
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import asyncio
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from collections.abc import Callable, Iterator
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from contextlib import contextmanager
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from dataclasses import dataclass, field
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import inspect
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import logging
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from typing import Any
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from .context import LOG_CONTEXT_FIELDS
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from .formatters import ContextFilter
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@dataclass(frozen=True)
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class ProcessLogEvent:
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type: str = "process_log"
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level: str = "INFO"
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message: str = ""
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logger: str = ""
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timestamp: float = 0.0
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context: dict[str, Any] = field(default_factory=dict)
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@classmethod
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def from_record(cls, record: logging.LogRecord) -> "ProcessLogEvent":
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context = dict(getattr(record, "log_context", {}) or {})
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for key in LOG_CONTEXT_FIELDS:
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value = getattr(record, key, None)
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if value is not None:
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context[key] = value
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return cls(
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level=record.levelname,
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message=record.getMessage(),
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logger=record.name,
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timestamp=record.created,
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context=context,
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)
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def to_dict(self) -> dict[str, Any]:
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return {
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"type": self.type,
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"level": self.level,
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"message": self.message,
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"logger": self.logger,
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"timestamp": self.timestamp,
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"context": self.context,
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}
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class ProcessLogHandler(logging.Handler):
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"""Emit structured process-log events from matching records."""
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def __init__(
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self,
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emit: Callable[[ProcessLogEvent], Any],
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*,
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task_id: str | None = None,
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turn_id: str | None = None,
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min_level: int = logging.INFO,
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) -> None:
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super().__init__(level=min_level)
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self._emit = emit
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self._task_id = task_id
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self._turn_id = turn_id
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self.addFilter(ContextFilter())
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def emit(self, record: logging.LogRecord) -> None:
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try:
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event = ProcessLogEvent.from_record(record)
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if self._task_id and event.context.get("task_id") != self._task_id:
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return
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if self._turn_id and event.context.get("turn_id") != self._turn_id:
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return
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result = self._emit(event)
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if inspect.isawaitable(result):
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try:
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loop = asyncio.get_running_loop()
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except RuntimeError:
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return
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asyncio.ensure_future(result, loop=loop)
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except Exception:
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self.handleError(record)
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@contextmanager
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def capture_process_logs(
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emit: Callable[[ProcessLogEvent], Any],
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*,
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task_id: str | None = None,
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turn_id: str | None = None,
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min_level: int = logging.INFO,
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) -> Iterator[ProcessLogHandler]:
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"""Capture matching stdlib log records and emit ``ProcessLogEvent`` objects."""
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handler = ProcessLogHandler(
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emit,
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task_id=task_id,
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turn_id=turn_id,
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min_level=min_level,
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)
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root = logging.getLogger()
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root.addHandler(handler)
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try:
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yield handler
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finally:
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root.removeHandler(handler)
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handler.close()
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