update the other handlers to reflect the changes

src/output_handlers/base_handler.py

@@ -14,6 +14,8 @@ class BaseHandler(ABC):
     logger = logging.getLogger(__name__)
     _successful_writes = 0
     _failed_writes = 0
+    fail_on_error: bool
+    semaphore: asyncio.Semaphore = None
 
     @classmethod
     @abstractmethod
@@ -27,13 +29,12 @@ class BaseHandler(ABC):
                             0 means unlimited concurrency.
             **kwargs: Additional keyword arguments for specific handler implementations.
         """
-        self = cls(**kwargs)
-        self.fail_on_error = fail_on_error
-        self.semaphore = None
+        obj = cls(**kwargs)
+        obj.fail_on_error = fail_on_error
         if max_concurrent > 0:
-            self.semaphore = asyncio.Semaphore(max_concurrent)
-        self.logger.info(f"Handler initialized with fail_on_error={self.fail_on_error}, max_concurrent={max_concurrent}")
-        return self
+            obj.semaphore = asyncio.Semaphore(max_concurrent)
+        obj.logger.info(f"Handler initialized with fail_on_error={obj.fail_on_error}, max_concurrent={max_concurrent}")
+        return obj
 
 
     @abstractmethod

src/output_handlers/bunny_storage.py

@@ -3,38 +3,39 @@ import aiohttp
 from .base_handler import BaseHandler
 
 class BunnyStorageHandler(BaseHandler):
-    def __init__(
-        self,
+
+    base_url: str
+    headers: dict
+    _session: aiohttp.ClientSession
+    _connector: aiohttp.TCPConnector
+
+    @classmethod
+    async def create(
+        cls,
         region: str,
         base_path: str,
         api_key: str,
-        fail_on_error: bool = True,
         keepalive_timeout: int = 75,
         **kwargs,
-    ):
-        super().__init__(fail_on_error=fail_on_error, **kwargs)
-        self.base_url = f"https://{region}.bunnycdn.com/{base_path}"
-        self.headers = {
+    ) -> "BunnyStorageHandler":
+        obj = await super().create(**kwargs)
+        obj.base_url = f"https://{region}.bunnycdn.com/{base_path}"
+        obj.headers = {
             "AccessKey": api_key,
             "Content-Type": "application/json",
             "accept": "application/json",
         }
 
-        # initialized later, in a guaranteed async context
-        self._connector = None
-        self._session = None
-        self._keepalive_timeout = keepalive_timeout
+        # setup the aiohttp session and connector
+        obj._connector = aiohttp.TCPConnector(
+            # limit is implicitly set to 100
+            keepalive_timeout = keepalive_timeout,
+        )
+        obj._session = aiohttp.ClientSession(connector=obj._connector)
+        return obj
 
-    async def setup_connector(self):
-        if self._session is None:
-            self._connector = aiohttp.TCPConnector(
-                # limit is implicitly set to 100
-                keepalive_timeout = self._keepalive_timeout,
-            )
-            self._session = aiohttp.ClientSession(connector=self._connector)
 
     async def _write_entry(self, entry: dict, uid: str) -> bool:
-        await self.setup_connector()
         payload = json.dumps(entry).encode("utf-8")
         url = f"{self.base_url}/{uid}.json"
 
@@ -50,6 +51,7 @@ class BunnyStorageHandler(BaseHandler):
             self.logger.exception(f"Exception while uploading UID={uid}")
             return False
 
+
     async def close(self):
         await self._session.close()
         await self._connector.close()

src/output_handlers/filesystem.py

@@ -8,7 +8,10 @@ class FilesystemHandler(BaseHandler):
     """
     Handler that writes files to the filesystem.
     """
-    def __init__(self, output_dir: str, **kwargs):
+    output_dir: Path
+
+    @classmethod
+    async def create(cls, output_dir: str, **kwargs) -> "FilesystemHandler":
         """
         Initializes the FileSystemHandler with the specified output directory.
 
@@ -16,11 +19,12 @@ class FilesystemHandler(BaseHandler):
             output_dir (str): The directory where files will be written.
             **kwargs: Additional keyword arguments for the BaseHandler.
         """
-        super().__init__(**kwargs)
-        self.output_dir = Path(output_dir)
+        obj = await super().create(**kwargs)
+        obj.output_dir = Path(output_dir)
         # Ensure the target directory exists
-        self.output_dir.mkdir(parents=True, exist_ok=True)
-        self.logger.info(f"Output directory set to {self.output_dir}")
+        obj.output_dir.mkdir(parents=True, exist_ok=True)
+        obj.logger.info(f"Output directory set to {obj.output_dir}")
+        return obj
 
 
     async def _write_entry(self, entry: dict, uid: str) -> bool:

src/output_handlers/s3.py

@@ -2,12 +2,17 @@
 from .base_handler import BaseHandler
 import json
 from aiobotocore.session import AioSession
+from aiobotocore.client import AioBaseClient
 from contextlib import AsyncExitStack
 
 class S3Handler(BaseHandler):
     """
     Handler that writes files to an S3 bucket asynchronously.
     """
+    bucket_name: str
+    client: AioBaseClient
+    exit_stack: AsyncExitStack
+
     @classmethod
     async def create(cls, url: str, access_key: str, secret_key: str, bucket_name: str, **kwargs) -> "S3Handler":
         """
@@ -16,13 +21,13 @@ class S3Handler(BaseHandler):
         Args:
             **kwargs: Additional keyword arguments for the BaseHandler.
         """
-        self = await super().create(**kwargs)
-        self.bucket_name = bucket_name
+        obj = await super().create(**kwargs)
+        obj.bucket_name = bucket_name
 
-        self.exit_stack = AsyncExitStack()
+        obj.exit_stack = AsyncExitStack()
 
         session = AioSession()
-        self.client = await self.exit_stack.enter_async_context(
+        obj.client = await obj.exit_stack.enter_async_context(
             session.create_client(
                 service_name = 's3',
                 # region_name='us-west-2',
@@ -32,8 +37,8 @@ class S3Handler(BaseHandler):
             )
         )
 
-        await self._ensure_bucket_exists()
-        return self
+        await obj._ensure_bucket_exists()
+        return obj
 
 
     async def _ensure_bucket_exists(self):