add app settings

src/fastapi_app/lib/app/app.py

@@ -1,36 +1,142 @@
+import dataclasses
 import logging
+import logging.config as logging_config
+import typing
 
 import fastapi
+import uvicorn
 
+import lib.app.errors as app_errors
 import lib.app.settings as app_settings
+import lib.app.split_settings as app_split_settings
+import lib.api.v1.handlers as api_v1_handlers
 
 logger = logging.getLogger(__name__)
 
 
 class Application:
-    def __init__(self) -> None:
-        self.settings = app_settings
-        self.logger = logging.getLogger(__name__)
-        self.producer = None
+    def __init__(
+        self,
+        settings: app_settings.Settings,
+        fastapi_app: fastapi.FastAPI,
+        disposable_resources: list[DisposableResource],
+    ) -> None:
+        self._settings = settings
+        self._fastapi_app = fastapi_app
+        self._disposable_resources = disposable_resources
+        # self.logger = logging.getLogger(__name__)
+        # self.producer = None
 
-    def create_app(self) -> fastapi.FastAPI:
-        app = fastapi.FastAPI(
-            title="FastAPI",
-            version="0.1.0",
-            docs_url="/api/openapi",
-            openapi_url="/api/openapi.json",
+    # def create_app(self) -> fastapi.FastAPI:
+    #     app = fastapi.FastAPI(
+    #         title=self._settings.app.title,
+    #         version=self._settings.app.version,
+    #         docs_url=self._settings.app.docs_url,
+    #         openapi_url=self._settings.app.openapi_url,
+    #         default_response_class=fastapi.responses.ORJSONResponse,
+    #     )
+    #
+    #     @app.on_event("startup")
+    #     async def startup_event():
+    #         self.logger.info("Starting server")
+    #
+    #     @app.on_event("shutdown")
+    #     async def shutdown_event():
+    #         self.logger.info("Shutting down server")
+    #
+    #     return app
+
+    @classmethod
+    def from_settings(cls, settings: app_settings.Settings) -> typing.Self:
+        # Logging
+
+        # logging.basicConfig(
+        #     level=settings.LOGS_MIN_LEVEL,
+        #     format=settings.LOGS_FORMAT,
+        # )
+        logging_config.dictConfig(app_split_settings.get_logging_config(**settings.logger.model_dump()))
+
+        logger.info("Initializing application")
+        disposable_resources = []
+
+        # Global clients
+
+        logger.info("Initializing global clients")
+
+        # Clients
+
+        logger.info("Initializing clients")
+
+        # Repositories
+
+        logger.info("Initializing repositories")
+
+        # Caches
+
+        logger.info("Initializing caches")
+
+        # Services
+
+        logger.info("Initializing services")
+
+        # Handlers
+
+        logger.info("Initializing handlers")
+        # liveness_probe_handler = health_handlers.LivenessProbeHandler()
+
+        logger.info("Creating application")
+        # aio_app = aiohttp_web.Application()
+
+        fastapi_app = fastapi.FastAPI(
+            title=settings.app.title,
+            version=settings.app.version,
+            docs_url=settings.app.docs_url,
+            openapi_url=settings.app.openapi_url,
             default_response_class=fastapi.responses.ORJSONResponse,
         )
 
-        # app.include_router(api_handlers.user_router, prefix="/api/v1/users", tags=["users"])
-        # app.include_router(api_handlers.movie_router, prefix="/api/v1/movies", tags=["movies"])
+        # Routes
+        fastapi_app.include_router(api_v1_handlers.health_router, prefix="/api/v1/health", tags=["health"])
 
-        @app.on_event("startup")
-        async def startup_event():
-            self.logger.info("Starting server")
+        application = Application(
+            settings=settings,
+            fastapi_app=fastapi_app,
+            disposable_resources=disposable_resources,
+        )
 
-        @app.on_event("shutdown")
-        async def shutdown_event():
-            self.logger.info("Shutting down server")
+        logger.info("Initializing application finished")
 
-        return app
+        return application
+
+    async def start(self) -> None:
+        try:
+            config = uvicorn.Config(
+                app=self._fastapi_app,
+                host=self._settings.api.host,
+                port=self._settings.api.port,
+            )
+            server = uvicorn.Server(config)
+            await server.serve()
+        except BaseException as unexpected_error:
+            logger.exception("FastAPI failed to start")
+            raise app_errors.StartServerError("FastAPI failed to start") from unexpected_error
+
+    async def dispose(self) -> None:
+        logger.info("Application is shutting down...")
+        dispose_errors = []
+
+        for resource in self._disposable_resources:
+            logger.info("Disposing %s...", resource.name)
+            try:
+                await resource.dispose_callback
+            except Exception as unexpected_error:
+                dispose_errors.append(unexpected_error)
+                logger.exception("Failed to dispose %s", resource.name)
+            else:
+                logger.info("%s has been disposed", resource.name)
+
+        if len(dispose_errors) != 0:
+            logger.error("Application has shut down with errors")
+            raise app_errors.DisposeError("Application has shut down with errors, see logs above")
+
+        logger.info("Application has successfully shut down")

src/fastapi_app/lib/app/settings.py

@@ -1,5 +1,3 @@
-import logging.config as logging_config
-
 import pydantic
 import pydantic_settings
 
@@ -17,10 +15,3 @@ class Settings(pydantic_settings.BaseSettings):
     project: app_split_settings.ProjectSettings = pydantic.Field(
         default_factory=lambda: app_split_settings.ProjectSettings()
     )
-
-
-settings = Settings()  # todo Вынести в инициализацию
-
-logging_config.dictConfig(  # todo Вынести в инициализацию
-    app_split_settings.get_logging_config(**settings.logger.model_dump())
-)