logger refactor

app/utils/singleton.py

@@ -0,0 +1,18 @@
+from threading import Lock
+
+
+class SingletonMeta(type):
+    """
+    This is a thread-safe implementation of Singleton.
+    """
+
+    _instances = {}
+
+    _lock: Lock = Lock()
+
+    def __call__(cls, *args, **kwargs):
+        with cls._lock:
+            if cls not in cls._instances:
+                instance = super().__call__(*args, **kwargs)
+                cls._instances[cls] = instance
+        return cls._instances[cls]