Module `aws_lambda_powertools.utilities.feature_flags.base`

Classes

class BaseValidator

Helper class that provides a standard way to create an ABC using inheritance.

Expand source code

class BaseValidator(ABC):
    @abstractmethod
    def validate(self):
        raise NotImplementedError()  # pragma: no cover

Ancestors

abc.ABC

Subclasses

Methods

def validate(self)

class StoreProvider

Helper class that provides a standard way to create an ABC using inheritance.

Expand source code

class StoreProvider(ABC):
    @property
    @abstractmethod
    def get_raw_configuration(self) -> Dict[str, Any]:
        """Get configuration from any store and return the parsed JSON dictionary"""
        raise NotImplementedError()  # pragma: no cover

    @abstractmethod
    def get_configuration(self) -> Dict[str, Any]:
        """Get configuration from any store and return the parsed JSON dictionary

        If envelope is set, it'll extract and return feature flags from configuration,
        otherwise it'll return the entire configuration fetched from the store.

        Raises
        ------
        ConfigurationStoreError
            Any error that can occur during schema fetch or JSON parse

        Returns
        -------
        Dict[str, Any]
            parsed JSON dictionary

            **Example**

        ```python
        {
            "premium_features": {
                "default": False,
                "rules": {
                    "customer tier equals premium": {
                        "when_match": True,
                        "conditions": [
                            {
                                "action": "EQUALS",
                                "key": "tier",
                                "value": "premium",
                            }
                        ],
                    }
                },
            },
            "feature_two": {
                "default": False
            }
        }
        ```
        """
        raise NotImplementedError()  # pragma: no cover

Ancestors

abc.ABC

Subclasses

AppConfigStore

Instance variables

prop get_raw_configuration : Dict[str, Any]

Get configuration from any store and return the parsed JSON dictionary

Expand source code

@property
@abstractmethod
def get_raw_configuration(self) -> Dict[str, Any]:
    """Get configuration from any store and return the parsed JSON dictionary"""
    raise NotImplementedError()  # pragma: no cover

Methods

def get_configuration(self) ‑> Dict[str, Any]

Get configuration from any store and return the parsed JSON dictionary

If envelope is set, it'll extract and return feature flags from configuration, otherwise it'll return the entire configuration fetched from the store.

Raises

ConfigurationStoreError: Any error that can occur during schema fetch or JSON parse

Returns

Dict[str, Any]

parsed JSON dictionary

Example

{
    "premium_features": {
        "default": False,
        "rules": {
            "customer tier equals premium": {
                "when_match": True,
                "conditions": [
                    {
                        "action": "EQUALS",
                        "key": "tier",
                        "value": "premium",
                    }
                ],
            }
        },
    },
    "feature_two": {
        "default": False
    }
}