Configuration loading code

src/configuration.py

@@ -0,0 +1,43 @@
+import yaml
+
+from typing import Any, Optional
+from models.config import Configuration, LLamaStackConfiguration
+
+
+class AppConfig:
+    _instance = None
+
+    def __new__(cls, *args: Any, **kwargs: Any) -> "AppConfig":
+        """Create a new instance of the class."""
+        if not isinstance(cls._instance, cls):
+            cls._instance = super().__new__(cls, *args, **kwargs)
+        return cls._instance
+
+    def __init__(self) -> None:
+        """Initialize the class instance."""
+        self._configuration: Optional[Configuration] = None
+
+    def load_configuration(self, filename: str) -> None:
+        """Load configuration from YAML file."""
+        with open(filename, encoding="utf-8") as fin:
+            config_dict = yaml.safe_load(fin)
+            print(config_dict)
+            self._configuration = Configuration(**config_dict)
+
+    @property
+    def configuration(self) -> Configuration:
+        assert (
+            self._configuration is not None
+        ), "logic error: configuration is not loaded"
+        return self._configuration
+
+    @property
+    def llama_stack_configuration(self) -> LLamaStackConfiguration:
+        assert (
+            self._configuration is not None
+        ), "logic error: configuration is not loaded"
+        return self._configuration.llama_stack
+
+
+configuration: AppConfig = AppConfig()
+xyz: str = "XYZ"

src/lightspeed-stack.py

@@ -1,21 +1,13 @@
 """Lightspeed stack."""
 
-import yaml
-
 from runners.uvicorn import start_uvicorn
 from models.config import Configuration
-
-
-def load_configuration(filename: str) -> Configuration:
-    """Load configuration from YAML file."""
-    with open(filename, encoding="utf-8") as fin:
-        config_dict = yaml.safe_load(fin)
-        print(config_dict)
-        return Configuration(**config_dict)
+from configuration import configuration
 
 
 if __name__ == "__main__":
     print("Lightspeed stack")
-    configuration = load_configuration("lightspeed-stack.yaml")
+    configuration.load_configuration("lightspeed-stack.yaml")
     print(configuration)
+    print(configuration.llama_stack_configuration)
     start_uvicorn()