initial commit

한국투자증권(API)/MCP/Kis Trading MCP/module/decorator.py

@@ -0,0 +1,32 @@
+import threading
+
+
+def singleton(cls):
+    """
+    클래스 형태를 유지하는 싱글톤 데코레이터.
+    - 여러 번 호출해도 동일 인스턴스 반환
+    - __init__은 최초 1회만 실행
+    - 스레드-세이프
+    """
+    cls.__singleton_lock__ = getattr(cls, "__singleton_lock__", threading.Lock())
+    cls.__singleton_instance__ = getattr(cls, "__singleton_instance__", None)
+
+    orig_init = cls.__init__
+
+    def __init__(self, *args, **kwargs):
+        # 최초 1회만 실제 __init__ 수행
+        if getattr(self, "__initialized__", False):
+            return
+        orig_init(self, *args, **kwargs)
+        setattr(self, "__initialized__", True)
+
+    def __new__(inner_cls, *args, **kwargs):
+        if inner_cls.__singleton_instance__ is None:
+            with inner_cls.__singleton_lock__:
+                if inner_cls.__singleton_instance__ is None:
+                    inner_cls.__singleton_instance__ = object.__new__(inner_cls)
+        return inner_cls.__singleton_instance__
+
+    cls.__init__ = __init__
+    cls.__new__ = staticmethod(__new__)
+    return cls