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Rename remaing modules to match AIP-21 (apache#12917)
As discussed in AIP-21 * Rename airflow.hooks.base_hook to airflow.hooks.base * Rename airflow.hooks.dbapi_hook to airflow.hooks.dbapi * Rename airflow.sensors.base_sensor_operator to airflow.sensors.base * Rename airflow.sensors.date_time_sensor to airflow.sensors.date_time * Rename airflow.sensors.time_delta_sensor to airflow.sensors.time_delta Co-authored-by: Kaxil Naik <[email protected]>
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| # | ||
| # Licensed to the Apache Software Foundation (ASF) under one | ||
| # or more contributor license agreements. See the NOTICE file | ||
| # distributed with this work for additional information | ||
| # regarding copyright ownership. The ASF licenses this file | ||
| # to you under the Apache License, Version 2.0 (the | ||
| # "License"); you may not use this file except in compliance | ||
| # with the License. You may obtain a copy of the License at | ||
| # | ||
| # http://www.apache.org/licenses/LICENSE-2.0 | ||
| # | ||
| # Unless required by applicable law or agreed to in writing, | ||
| # software distributed under the License is distributed on an | ||
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| # KIND, either express or implied. See the License for the | ||
| # specific language governing permissions and limitations | ||
| # under the License. | ||
| """Base class for all hooks""" | ||
| import logging | ||
| import warnings | ||
| from typing import Any, Dict, List | ||
|
|
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| from airflow.models.connection import Connection | ||
| from airflow.typing_compat import Protocol | ||
| from airflow.utils.log.logging_mixin import LoggingMixin | ||
|
|
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| log = logging.getLogger(__name__) | ||
|
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|
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| class BaseHook(LoggingMixin): | ||
| """ | ||
| Abstract base class for hooks, hooks are meant as an interface to | ||
| interact with external systems. MySqlHook, HiveHook, PigHook return | ||
| object that can handle the connection and interaction to specific | ||
| instances of these systems, and expose consistent methods to interact | ||
| with them. | ||
| """ | ||
|
|
||
| @classmethod | ||
| def get_connections(cls, conn_id: str) -> List[Connection]: | ||
| """ | ||
| Get all connections as an iterable, given the connection id. | ||
| :param conn_id: connection id | ||
| :return: array of connections | ||
| """ | ||
| warnings.warn( | ||
| "`BaseHook.get_connections` method will be deprecated in the future." | ||
| "Please use `BaseHook.get_connection` instead.", | ||
| PendingDeprecationWarning, | ||
| stacklevel=2, | ||
| ) | ||
| return [cls.get_connection(conn_id)] | ||
|
|
||
| @classmethod | ||
| def get_connection(cls, conn_id: str) -> Connection: | ||
| """ | ||
| Get connection, given connection id. | ||
| :param conn_id: connection id | ||
| :return: connection | ||
| """ | ||
| conn = Connection.get_connection_from_secrets(conn_id) | ||
| if conn.host: | ||
| log.info( | ||
| "Using connection to: id: %s. Host: %s, Port: %s, Schema: %s, Login: %s, Password: %s, " | ||
| "extra: %s", | ||
| conn.conn_id, | ||
| conn.host, | ||
| conn.port, | ||
| conn.schema, | ||
| conn.login, | ||
| "XXXXXXXX" if conn.password else None, | ||
| "XXXXXXXX" if conn.extra_dejson else None, | ||
| ) | ||
| return conn | ||
|
|
||
| @classmethod | ||
| def get_hook(cls, conn_id: str) -> "BaseHook": | ||
| """ | ||
| Returns default hook for this connection id. | ||
| :param conn_id: connection id | ||
| :return: default hook for this connection | ||
| """ | ||
| # TODO: set method return type to BaseHook class when on 3.7+. | ||
| # See https://stackoverflow.com/a/33533514/3066428 | ||
| connection = cls.get_connection(conn_id) | ||
| return connection.get_hook() | ||
|
|
||
| def get_conn(self) -> Any: | ||
| """Returns connection for the hook.""" | ||
| raise NotImplementedError() | ||
|
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|
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| class DiscoverableHook(Protocol): | ||
| """ | ||
| Interface that providers *can* implement to be discovered by ProvidersManager. | ||
| It is not used by any of the Hooks, but simply methods and class fields described here are | ||
| implemented by those Hooks. Each method is optional -- only implement the ones you need. | ||
| The conn_name_attr, default_conn_name, conn_type should be implemented by those | ||
| Hooks that want to be automatically mapped from the connection_type -> Hook when get_hook method | ||
| is called with connection_type. | ||
| Additionally hook_name should be set when you want the hook to have a custom name in the UI selection | ||
| Name. If not specified, conn_name will be used. | ||
| The "get_ui_field_behaviour" and "get_connection_form_widgets" are optional - override them if you want | ||
| to customize the Connection Form screen. You can add extra widgets to parse your extra fields via the | ||
| get_connection_form_widgets method as well as hide or relabel the fields or pre-fill | ||
| them with placeholders via get_ui_field_behaviour method. | ||
| Note that the "get_ui_field_behaviour" and "get_connection_form_widgets" need to be set by each class | ||
| in the class hierarchy in order to apply widget customizations. | ||
| For example, even if you want to use the fields from your parent class, you must explicitly | ||
| have a method on *your* class: | ||
| .. code-block:: python | ||
| @classmethod | ||
| def get_ui_field_behaviour(cls): | ||
| return super().get_ui_field_behaviour() | ||
| You also need to add the Hook class name to list 'hook_class_names' in provider.yaml in case you | ||
| build an internal provider or to return it in dictionary returned by provider_info entrypoint in the | ||
| package you prepare. | ||
| You can see some examples in airflow/providers/jdbc/hooks/jdbc.py. | ||
| """ | ||
|
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||
| conn_name_attr: str | ||
| default_conn_name: str | ||
| conn_type: str | ||
| hook_name: str | ||
|
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| @staticmethod | ||
| def get_connection_form_widgets() -> Dict[str, Any]: | ||
| """ | ||
| Returns dictionary of widgets to be added for the hook to handle extra values. | ||
| If you have class hierarchy, usually the widgets needed by your class are already | ||
| added by the base class, so there is no need to implement this method. It might | ||
| actually result in warning in the logs if you try to add widgets that have already | ||
| been added by the base class. | ||
| Note that values of Dict should be of wtforms.Field type. It's not added here | ||
| for the efficiency of imports. | ||
| """ | ||
| ... | ||
|
|
||
| @staticmethod | ||
| def get_ui_field_behaviour() -> Dict: | ||
| """ | ||
| Returns dictionary describing customizations to implement in javascript handling the | ||
| connection form. Should be compliant with airflow/customized_form_field_behaviours.schema.json' | ||
| If you change conn_type in a derived class, you should also | ||
| implement this method and return field customizations appropriate to your Hook. This | ||
| is because the child hook will have usually different conn_type and the customizations | ||
| are per connection type. | ||
| .. seealso:: | ||
| :class:`~airflow.providers.google.cloud.hooks.compute_ssh.ComputeSSH` as an example | ||
| """ | ||
| ... |
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