refactor(parameters): BaseProvider._get to also support Dict (#3090)

Author: leandrodamascena

Diff for: aws_lambda_powertools/utilities/parameters/base.py

@@ -147,7 +147,7 @@ def get(
         return value
 
     @abstractmethod
-    def _get(self, name: str, **sdk_options) -> Union[str, bytes]:
+    def _get(self, name: str, **sdk_options) -> Union[str, bytes, Dict[str, Any]]:
         """
         Retrieve parameter value from the underlying parameter store
         """

Diff for: examples/parameters/src/custom_provider_vault.py

@@ -1,5 +1,4 @@
-import json
-from typing import Dict
+from typing import Any, Dict
 
 from hvac import Client
 
@@ -8,21 +7,18 @@
 
 class VaultProvider(BaseProvider):
     def __init__(self, vault_url: str, vault_token: str) -> None:
-
         super().__init__()
 
         self.vault_client = Client(url=vault_url, verify=False, timeout=10)
         self.vault_client.token = vault_token
 
-    def _get(self, name: str, **sdk_options) -> str:
-
+    def _get(self, name: str, **sdk_options) -> Dict[str, Any]:
         # for example proposal, the mountpoint is always /secret
         kv_configuration = self.vault_client.secrets.kv.v2.read_secret(path=name)
 
-        return json.dumps(kv_configuration["data"]["data"])
+        return kv_configuration["data"]["data"]
 
     def _get_multiple(self, path: str, **sdk_options) -> Dict[str, str]:
-
         list_secrets = {}
         all_secrets = self.vault_client.secrets.kv.v2.list_secrets(path=path)
 

Diff for: examples/parameters/src/working_with_own_provider_vault.py

@@ -14,10 +14,9 @@
 
 
 def lambda_handler(event: dict, context: LambdaContext):
-
     try:
         # Retrieve a single parameter
-        endpoint_comments: Any = vault_provider.get("comments_endpoint", transform="json")
+        endpoint_comments: Any = vault_provider.get("comments_endpoint")
 
         # you can get all parameters using get_multiple and specifying vault mount point
         # # for testing purposes we will not use it