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Small helpers for benchmark-time API call logging and context propagation.
"""
from __future__ import annotations
from contextlib import contextmanager
from contextvars import ContextVar
from datetime import datetime, timezone
import json
from pathlib import Path
import threading
from typing import Any, Dict, Iterator, Optional
_CALL_CONTEXT: ContextVar[Dict[str, Any]] = ContextVar("simplemem_call_context", default={})
_ACTIVE_LOGGER: "JsonlCallLogger | None" = None
def now_iso() -> str:
return datetime.now(timezone.utc).isoformat(timespec="seconds")
def current_call_context() -> Dict[str, Any]:
return dict(_CALL_CONTEXT.get())
@contextmanager
def scoped_call_context(**updates: Any) -> Iterator[Dict[str, Any]]:
base = current_call_context()
merged = dict(base)
for key, value in updates.items():
if value is not None:
merged[key] = value
token = _CALL_CONTEXT.set(merged)
try:
yield merged
finally:
_CALL_CONTEXT.reset(token)
class JsonlCallLogger:
def __init__(self, path: str | Path):
self.path = Path(path)
self.path.parent.mkdir(parents=True, exist_ok=True)
self._lock = threading.Lock()
def log(self, record: Dict[str, Any]) -> None:
payload = dict(record)
payload.setdefault("logged_at", now_iso())
line = json.dumps(payload, ensure_ascii=False, sort_keys=True)
with self._lock:
with self.path.open("a", encoding="utf-8") as handle:
handle.write(line)
handle.write("\n")
def set_api_call_logger(logger: Optional[JsonlCallLogger]) -> None:
global _ACTIVE_LOGGER
_ACTIVE_LOGGER = logger
def get_api_call_logger() -> Optional[JsonlCallLogger]:
return _ACTIVE_LOGGER
def log_api_call(record: Dict[str, Any]) -> None:
logger = get_api_call_logger()
if logger is not None:
logger.log(record)
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