refactor(idempotency): add from __future__ import annotations

aws_lambda_powertools/utilities/idempotency/base.py

@@ -1,11 +1,10 @@
+from __future__ import annotations
+
 import datetime
 import logging
 from copy import deepcopy
-from typing import Any, Callable, Dict, Optional, Tuple
+from typing import TYPE_CHECKING, Any, Callable
 
-from aws_lambda_powertools.utilities.idempotency.config import (
-    IdempotencyConfig,
-)
 from aws_lambda_powertools.utilities.idempotency.exceptions import (
     IdempotencyAlreadyInProgressError,
     IdempotencyInconsistentStateError,
@@ -15,20 +14,25 @@
     IdempotencyPersistenceLayerError,
     IdempotencyValidationError,
 )
-from aws_lambda_powertools.utilities.idempotency.persistence.base import (
-    BasePersistenceLayer,
-)
 from aws_lambda_powertools.utilities.idempotency.persistence.datarecord import (
     STATUS_CONSTANTS,
     DataRecord,
 )
-from aws_lambda_powertools.utilities.idempotency.serialization.base import (
-    BaseIdempotencySerializer,
-)
 from aws_lambda_powertools.utilities.idempotency.serialization.no_op import (
     NoOpSerializer,
 )
 
+if TYPE_CHECKING:
+    from aws_lambda_powertools.utilities.idempotency.config import (
+        IdempotencyConfig,
+    )
+    from aws_lambda_powertools.utilities.idempotency.persistence.base import (
+        BasePersistenceLayer,
+    )
+    from aws_lambda_powertools.utilities.idempotency.serialization.base import (
+        BaseIdempotencySerializer,
+    )
+
 MAX_RETRIES = 2
 logger = logging.getLogger(__name__)
 
@@ -69,9 +73,9 @@ def __init__(
         function_payload: Any,
         config: IdempotencyConfig,
         persistence_store: BasePersistenceLayer,
-        output_serializer: Optional[BaseIdempotencySerializer] = None,
-        function_args: Optional[Tuple] = None,
-        function_kwargs: Optional[Dict] = None,
+        output_serializer: BaseIdempotencySerializer | None = None,
+        function_args: tuple | None = None,
+        function_kwargs: dict | None = None,
     ):
         """
         Initialize the IdempotencyHandler
@@ -84,12 +88,12 @@ def __init__(
             Idempotency Configuration
         persistence_store : BasePersistenceLayer
             Instance of persistence layer to store idempotency records
-        output_serializer: Optional[BaseIdempotencySerializer]
+        output_serializer: BaseIdempotencySerializer | None
             Serializer to transform the data to and from a dictionary.
             If not supplied, no serialization is done via the NoOpSerializer
-        function_args: Optional[Tuple]
+        function_args: tuple | None
             Function arguments
-        function_kwargs: Optional[Dict]
+        function_kwargs: dict | None
             Function keyword arguments
         """
         self.function = function
@@ -150,7 +154,7 @@ def _process_idempotency(self):
 
         return self._get_function_response()
 
-    def _get_remaining_time_in_millis(self) -> Optional[int]:
+    def _get_remaining_time_in_millis(self) -> int | None:
         """
         Tries to determine the remaining time available for the current lambda invocation.
 
@@ -160,7 +164,7 @@ def _get_remaining_time_in_millis(self) -> Optional[int]:
 
         Returns
         -------
-        Optional[int]
+        int | None
             Remaining time in millis, or None if the remaining time cannot be determined.
         """
 
@@ -169,7 +173,7 @@ def _get_remaining_time_in_millis(self) -> Optional[int]:
 
         return None
 
-    def _get_idempotency_record(self) -> Optional[DataRecord]:
+    def _get_idempotency_record(self) -> DataRecord | None:
         """
         Retrieve the idempotency record from the persistence layer.
 
@@ -198,7 +202,7 @@ def _get_idempotency_record(self) -> Optional[DataRecord]:
 
         return data_record
 
-    def _handle_for_status(self, data_record: DataRecord) -> Optional[Any]:
+    def _handle_for_status(self, data_record: DataRecord) -> Any | None:
         """
         Take appropriate action based on data_record's status
 
@@ -208,7 +212,7 @@ def _handle_for_status(self, data_record: DataRecord) -> Optional[Any]:
 
         Returns
         -------
-        Optional[Any]
+        Any | None
             Function's response previously used for this idempotency key, if it has successfully executed already.
             In case an output serializer is configured, the response is deserialized.
 
@@ -235,7 +239,7 @@ def _handle_for_status(self, data_record: DataRecord) -> Optional[Any]:
                 f"Execution already in progress with idempotency key: "
                 f"{self.persistence_store.event_key_jmespath}={data_record.idempotency_key}",
             )
-        response_dict: Optional[dict] = data_record.response_json_as_dict()
+        response_dict: dict | None = data_record.response_json_as_dict()
         if response_dict is not None:
             serialized_response = self.output_serializer.from_dict(response_dict)
             if self.config.response_hook is not None:

aws_lambda_powertools/utilities/idempotency/config.py

@@ -1,22 +1,25 @@
-from typing import Dict, Optional
+from __future__ import annotations
 
-from aws_lambda_powertools.utilities.idempotency import IdempotentHookFunction
-from aws_lambda_powertools.utilities.typing import LambdaContext
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from aws_lambda_powertools.utilities.idempotency import IdempotentHookFunction
+    from aws_lambda_powertools.utilities.typing import LambdaContext
 
 
 class IdempotencyConfig:
     def __init__(
         self,
         event_key_jmespath: str = "",
         payload_validation_jmespath: str = "",
-        jmespath_options: Optional[Dict] = None,
+        jmespath_options: dict | None = None,
         raise_on_no_idempotency_key: bool = False,
         expires_after_seconds: int = 60 * 60,  # 1 hour default
         use_local_cache: bool = False,
         local_cache_max_items: int = 256,
         hash_function: str = "md5",
-        lambda_context: Optional[LambdaContext] = None,
-        response_hook: Optional[IdempotentHookFunction] = None,
+        lambda_context: LambdaContext | None = None,
+        response_hook: IdempotentHookFunction | None = None,
     ):
         """
         Initialize the base persistence layer
@@ -50,8 +53,8 @@ def __init__(
         self.use_local_cache = use_local_cache
         self.local_cache_max_items = local_cache_max_items
         self.hash_function = hash_function
-        self.lambda_context: Optional[LambdaContext] = lambda_context
-        self.response_hook: Optional[IdempotentHookFunction] = response_hook
+        self.lambda_context: LambdaContext | None = lambda_context
+        self.response_hook: IdempotentHookFunction | None = response_hook
 
     def register_lambda_context(self, lambda_context: LambdaContext):
         """Captures the Lambda context, to calculate the remaining time before the invocation times out"""

aws_lambda_powertools/utilities/idempotency/exceptions.py

@@ -2,9 +2,12 @@
 Idempotency errors
 """
 
-from typing import Optional, Union
+from __future__ import annotations
 
-from aws_lambda_powertools.utilities.idempotency.persistence.datarecord import DataRecord
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from aws_lambda_powertools.utilities.idempotency.persistence.datarecord import DataRecord
 
 
 class BaseError(Exception):
@@ -13,7 +16,7 @@ class BaseError(Exception):
     See https://github.com/aws-powertools/powertools-lambda-python/issues/1772
     """
 
-    def __init__(self, *args: Optional[Union[str, Exception]]):
+    def __init__(self, *args: str | Exception | None):
         self.message = str(args[0]) if args else ""
         self.details = "".join(str(arg) for arg in args[1:]) if args[1:] else None
 
@@ -31,7 +34,7 @@ class IdempotencyItemAlreadyExistsError(BaseError):
     Item attempting to be inserted into persistence store already exists and is not expired
     """
 
-    def __init__(self, *args: Optional[Union[str, Exception]], old_data_record: Optional[DataRecord] = None):
+    def __init__(self, *args: str | Exception | None, old_data_record: DataRecord | None = None):
         self.old_data_record = old_data_record
         super().__init__(*args)
 

aws_lambda_powertools/utilities/idempotency/hook.py

@@ -1,6 +1,9 @@
-from typing import Any, Protocol
+from __future__ import annotations
 
-from aws_lambda_powertools.utilities.idempotency.persistence.datarecord import DataRecord
+from typing import TYPE_CHECKING, Any, Protocol
+
+if TYPE_CHECKING:
+    from aws_lambda_powertools.utilities.idempotency.persistence.datarecord import DataRecord
 
 
 class IdempotentHookFunction(Protocol):

aws_lambda_powertools/utilities/idempotency/idempotency.py

@@ -2,36 +2,40 @@
 Primary interface for idempotent Lambda functions utility
 """
 
+from __future__ import annotations
+
 import functools
 import logging
 import os
 from inspect import isclass
-from typing import Any, Callable, Dict, Optional, Type, Union, cast
+from typing import TYPE_CHECKING, Any, Callable, cast
 
 from aws_lambda_powertools.middleware_factory import lambda_handler_decorator
 from aws_lambda_powertools.shared import constants
 from aws_lambda_powertools.shared.types import AnyCallableT
 from aws_lambda_powertools.utilities.idempotency.base import IdempotencyHandler
 from aws_lambda_powertools.utilities.idempotency.config import IdempotencyConfig
-from aws_lambda_powertools.utilities.idempotency.persistence.base import (
-    BasePersistenceLayer,
-)
 from aws_lambda_powertools.utilities.idempotency.serialization.base import (
     BaseIdempotencyModelSerializer,
     BaseIdempotencySerializer,
 )
-from aws_lambda_powertools.utilities.typing import LambdaContext
+
+if TYPE_CHECKING:
+    from aws_lambda_powertools.utilities.idempotency.persistence.base import (
+        BasePersistenceLayer,
+    )
+    from aws_lambda_powertools.utilities.typing import LambdaContext
 
 logger = logging.getLogger(__name__)
 
 
 @lambda_handler_decorator
 def idempotent(
     handler: Callable[[Any, LambdaContext], Any],
-    event: Dict[str, Any],
+    event: dict[str, Any],
     context: LambdaContext,
     persistence_store: BasePersistenceLayer,
-    config: Optional[IdempotencyConfig] = None,
+    config: IdempotencyConfig | None = None,
     **kwargs,
 ) -> Any:
     """
@@ -41,9 +45,9 @@ def idempotent(
     ----------
     handler: Callable
         Lambda's handler
-    event: Dict
+    event: dict
         Lambda's Event
-    context: Dict
+    context: dict
         Lambda's Context
     persistence_store: BasePersistenceLayer
         Instance of BasePersistenceLayer to store data
@@ -86,12 +90,12 @@ def idempotent(
 
 
 def idempotent_function(
-    function: Optional[AnyCallableT] = None,
+    function: AnyCallableT | None = None,
     *,
     data_keyword_argument: str,
     persistence_store: BasePersistenceLayer,
-    config: Optional[IdempotencyConfig] = None,
-    output_serializer: Optional[Union[BaseIdempotencySerializer, Type[BaseIdempotencyModelSerializer]]] = None,
+    config: IdempotencyConfig | None = None,
+    output_serializer: BaseIdempotencySerializer | type[BaseIdempotencyModelSerializer] | None = None,
     **kwargs: Any,
 ) -> Any:
     """
@@ -107,7 +111,7 @@ def idempotent_function(
         Instance of BasePersistenceLayer to store data
     config: IdempotencyConfig
         Configuration
-    output_serializer: Optional[Union[BaseIdempotencySerializer, Type[BaseIdempotencyModelSerializer]]]
+    output_serializer: BaseIdempotencySerializer | type[BaseIdempotencyModelSerializer] | None
             Serializer to transform the data to and from a dictionary.
             If not supplied, no serialization is done via the NoOpSerializer.
             In case a serializer of type inheriting BaseIdempotencyModelSerializer is given,