# lint-amnesty, pylint: disable=missing-module-docstring
class InvalidDefinitionError(Exception):
    pass


class NotFoundError(Exception):
    pass


class InvalidVersionError(Exception):
    """
    Tried to save an item with a location that a store cannot support (e.g., draft version
    for a non-leaf node)
    """
    def __init__(self, location):
        super().__init__()
        self.location = location


class SerializationError(Exception):
    """
    Thrown when a module cannot be exported to XML
    """
    def __init__(self, location, msg):
        super().__init__(msg)
        self.location = location


class UndefinedContext(Exception):
    """
    Tried to access an xmodule field which needs a different context (runtime) to have a value.
    """
    pass  # lint-amnesty, pylint: disable=unnecessary-pass


class HeartbeatFailure(Exception):
    """
    Raised when heartbeat fails.
    """

    def __init__(self, msg, service):
        """
        In addition to a msg, provide the name of the service.
        """
        self.service = service
        super().__init__(msg)