fix MessageQueueManager

app/utils/singleton.py

@@ -3,7 +3,7 @@ import abc
 
 class Singleton(abc.ABCMeta, type):
     """
-    类单例模式
+    类单例模式（按参数）
     """
 
     _instances: dict = {}
@@ -19,3 +19,24 @@ class AbstractSingleton(abc.ABC, metaclass=Singleton):
     """
     抽像类单例模式
     """
+    pass
+
+
+class SingletonClass(abc.ABCMeta, type):
+    """
+    类单例模式（按类）
+    """
+
+    _instances: dict = {}
+
+    def __call__(cls, *args, **kwargs):
+        if cls not in cls._instances:
+            cls._instances[cls] = super(SingletonClass, cls).__call__(*args, **kwargs)
+        return cls._instances[cls]
+
+
+class AbstractSingletonClass(abc.ABC, metaclass=SingletonClass):
+    """
+    抽像类单例模式（按类）
+    """
+    pass