FncClient Library Error Types

Any failure in the Client Library is reported as a FncClientError. This class extends the Exception class and can be imported from fnc.errors. The exact reason of the failure could be distinguished by looking into its internal fields and specifically its ErrorType. The entire list of identified error types is shown below. Any known error will be wrapped into a FncClientError with error type GENERIC_ERROR.

# Client related errors
    GENERIC_ERROR
    CLIENT_VALIDATION_ERROR
    CLIENT_API_TOKEN_VALIDATION_ERROR

# Continuous Polling related errors
    POLLING_VALIDATION_ERROR
    POLLING_TIME_WINDOW_ERROR
    POLLING_INVERTED_TIME_WINDOW_ERROR
    POLLING_EMPTY_TIME_WINDOW_ERROR
    POLLING_LIMIT_OVERPASSED
    MISSING_CONTEXT

# Endpoint related errors
    ENDPOINT_ERROR
    ENDPOINT_VALIDATION_ERROR
    ENDPOINT_RESPONSE_VALIDATION_ERROR

# Request related errors
    REQUEST_VALIDATION_ERROR
    REQUEST_CONNECTION_ERROR
    REQUEST_TIMEOUT_ERROR
    REQUEST_HTTP_ERROR
    REQUEST_CLOSING_SESSION_ERROR
    REQUEST_ERROR

# Metastream related errors
    EVENTS_FETCH_VALIDATION_ERROR
    EVENTS_UNKNOWN_DATE_PREFIX_FORMAT