clan-app: Add threaded api execution by default

pkgs/clan-app/clan_app/api/__init__.py

@@ -1,5 +1,6 @@
 import inspect
 import logging
+import threading
 from collections.abc import Callable
 from typing import (
     Any,
@@ -42,11 +43,6 @@ class ImplFunc(GObject.Object, Generic[P, B]):
 
         self.emit("returns", GResult(result, method_name))
 
-    def _signature_check(self, *args: P.args, **kwargs: P.kwargs) -> B:
-        raise RuntimeError(
-            "This method is only for typechecking and should never be called"
-        )
-
     def await_result(self, fn: Callable[["ImplFunc[..., Any]", B], None]) -> None:
         self.connect("returns", fn)
 
@@ -64,6 +60,26 @@ class ImplFunc(GObject.Object, Generic[P, B]):
             return result
 
 
+class MethodExecutor(threading.Thread):
+    def __init__(
+        self, function: Callable[..., Any], *args: Any, **kwargs: dict[str, Any]
+    ) -> None:
+        super().__init__()
+        self.function = function
+        self.args = args
+        self.kwargs = kwargs
+        self.result: Any = None
+        self.finished = False
+
+    def run(self) -> None:
+        try:
+            self.result = self.function(*self.args, **self.kwargs)
+        except Exception as e:
+            log.exception(e)
+        finally:
+            self.finished = True
+
+
 class GObjApi:
     def __init__(self, methods: dict[str, Callable[..., Any]]) -> None:
         self._methods: dict[str, Callable[..., Any]] = methods
@@ -104,23 +120,32 @@ class GObjApi:
                         f"Overwritten method '{m_name}' has different signature than the implementation"
                     )
 
-    def get_obj(self, name: str) -> type[ImplFunc]:
-        result = self._obj_registry.get(name, None)
+    def get_obj(self, fn_name: str) -> type[ImplFunc]:
+        result = self._obj_registry.get(fn_name, None)
         if result is not None:
             return result
 
-        plain_method = self._methods.get(name, None)
-        if plain_method is None:
-            raise ValueError(f"Method '{name}' not found in Api")
+        plain_fn = self._methods.get(fn_name, None)
+        if plain_fn is None:
+            raise ValueError(f"Method '{fn_name}' not found in Api")
 
         class GenericFnRuntime(ImplFunc[..., Any]):
             def __init__(self) -> None:
                 super().__init__()
+                self.thread: MethodExecutor | None = None
 
             def async_run(self, *args: Any, **kwargs: dict[str, Any]) -> bool:
-                assert plain_method is not None
-                result = plain_method(*args, **kwargs)
-                self.returns(method_name=name, result=result)
-                return GLib.SOURCE_REMOVE
+                assert plain_fn is not None
+
+                if self.thread is None:
+                    self.thread = MethodExecutor(plain_fn, *args, **kwargs)
+                    self.thread.start()
+                    return GLib.SOURCE_CONTINUE
+                elif self.thread.finished:
+                    result = self.thread.result
+                    self.returns(method_name=fn_name, result=result)
+                    return GLib.SOURCE_REMOVE
+                else:
+                    return GLib.SOURCE_CONTINUE
 
         return cast(type[ImplFunc], GenericFnRuntime)