singer_sdk.InlineMapper#

class singer_sdk.InlineMapper#

Bases: PluginBase, SingerReader

Abstract base class for inline mappers.

Create the tap or target.

Parameters:

config – May be one or more paths, either as str or PurePath objects, or it can be a predetermined config dict.
parse_env_config – True to parse settings from env vars.
validate_config – True to require validation of config settings.

Raises:

ValueError – If config is not a dict or path string.

classmethod append_builtin_config(config_jsonschema: dict) → None#

Appends built-in config to config_jsonschema if not already set.

To customize or disable this behavior, developers may either override this class method or override the capabilities property to disabled any unwanted built-in capabilities.

For all except very advanced use cases, we recommend leaving these implementations “as-is”, since this provides the most choice to users and is the most “future proof” in terms of taking advantage of built-in capabilities which may be added in the future.

Parameters:: config_jsonschema – [description]

classmethod cb_version(ctx: Context, param: Option, value: bool) → None#

CLI callback to print the plugin version and exit.

Parameters:

ctx – Click context.
param – Click parameter.
value – Boolean indicating whether to print the version.

property config: Mapping[str, Any]#

Get config.

Returns:: A frozen (read-only) config dictionary map.

static config_from_cli_args(*args: str) → tuple[list[Path], bool]#

Parse CLI arguments into a config dictionary.

Parameters:: args – CLI arguments.
Raises:: FileNotFoundError – If the config file does not exist.
Returns:: A tuple containing the config dictionary and a boolean indicating whether the config file was found.

deserialize_json(line: str) → dict#

Deserialize a line of json.

Parameters:: line – A single line of json.
Returns:: A dictionary of the deserialized json.
Raises:: json.decoder.JSONDecodeError – raised if any lines are not valid json

classmethod get_plugin_version() → str#

Return the package version number.

Returns:: The package version number.

classmethod get_sdk_version() → str#

Return the package version number.

Returns:: The package version number.

classmethod get_singer_command() → Command#

Execute standard CLI handler for inline mappers.

Returns:: A click.Command object.

classmethod get_supported_python_versions() → list[str] | None#

Return the supported Python versions.

Returns:: A list of supported Python versions.

property initialized_at: int#

Start time of the plugin.

Returns:: The start time of the plugin.

classmethod invoke(*, about: bool = False, about_format: str | None = None, config: tuple[str, ...] = (), file_input: IO[str] | None = None) → None#

Invoke the mapper.

Parameters:

about – Display package metadata and settings.
about_format – Specify output style for –about.
config – Configuration file location or ‘ENV’ to use environment variables. Accepts multiple inputs as a tuple.
file_input – Optional file to read input from.

listen(file_input: IO[str] | None = None) → None#

Read from input until all messages are processed.

Parameters:: file_input – Readable stream of messages. Defaults to standard in.

This method is internal to the SDK and should not need to be overridden.

abstract map_activate_version_message(message_dict: dict) → Iterable[Message]#

Map a version message to zero or more new messages.

Parameters:: message_dict – An ACTIVATE_VERSION message JSON dictionary.

map_batch_message(message_dict: dict) → Iterable[Message]#

Map a batch message to zero or more new messages.

Parameters:: message_dict – A BATCH message JSON dictionary.
Raises:: NotImplementedError – if not implemented by subclass.

abstract map_record_message(message_dict: dict) → Iterable[Message]#

Map a record message to zero or more new messages.

Parameters:: message_dict – A RECORD message JSON dictionary.

abstract map_schema_message(message_dict: dict) → Iterable[Message]#

Map a schema message to zero or more new messages.

Parameters:: message_dict – A SCHEMA message JSON dictionary.

abstract map_state_message(message_dict: dict) → Iterable[Message]#

Map a state message to zero or more new messages.

Parameters:: message_dict – A STATE message JSON dictionary.

property mapper: PluginMapper#

Plugin mapper for this tap.

Returns:: A PluginMapper object.
Raises:: MapperNotInitialized – If the mapper has not been initialized.

name: str#: The executable name of the tap or target plugin. e.g. tap-foo

package_name: str | None = None#: The package name of the plugin. e.g meltanolabs-tap-foo

classmethod print_about(output_format: str | None = None) → None#

Print capabilities and other tap metadata.

Parameters:: output_format – Render option for the plugin information.

classmethod print_version(print_fn: ~typing.Callable[[~typing.Any], None] = <built-in function print>) → None#

Print help text for the tap.

Parameters:: print_fn – A function to use to display the plugin version. Defaults to print.

setup_mapper() → None#: Initialize the plugin mapper for this tap.

property state: dict#

Get state.

Raises:: NotImplementedError – If the derived plugin doesn’t override this method.