Refactor radar system

python_app/hardware_full/laser_control/monitoring/session.py

@@ -20,6 +20,8 @@ from dataclasses import asdict, dataclass
 from pathlib import Path
 from typing import Union
 
+from python_app.file_io import atomic_write_json
+
 _PathLike = Union[str, os.PathLike[str]]
 
 # Default IPC locations. Both are overridable via CLI/API so several runs can use
@@ -46,12 +48,7 @@ class LaserVariationSession:
         Writes to a temp file in the same directory then renames, so a concurrent
         checker never observes a half-written file.
         """
-        dest = Path(path)
-        dest.parent.mkdir(parents=True, exist_ok=True)
-        tmp = dest.with_name(f"{dest.name}.{os.getpid()}.tmp")
-        tmp.write_text(json.dumps(asdict(self), indent=2), encoding="utf-8")
-        os.replace(tmp, dest)
-        return dest
+        return atomic_write_json(Path(path), asdict(self))
 
     @classmethod
     def load(cls, path: _PathLike = DEFAULT_SESSION_PATH) -> "LaserVariationSession":