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Adds mechanism for provider package discovery. (#12383)
This is a simple mechanism that will allow us to dynamically discover and register all provider packages in the Airflow core. Closes: #11422
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| # | ||
| # 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. | ||
| """Manages all providers.""" | ||
| import importlib | ||
| import json | ||
| import logging | ||
| import pkgutil | ||
| import traceback | ||
| from typing import Dict | ||
|
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| import jsonschema | ||
| import yaml | ||
|
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||
| try: | ||
| import importlib.resources as importlib_resources | ||
| except ImportError: | ||
| # Try backported to PY<37 `importlib_resources`. | ||
| import importlib_resources | ||
|
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| log = logging.getLogger(__name__) | ||
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| def _load_schema() -> Dict: | ||
| return json.loads(importlib_resources.read_text('airflow', 'provider.yaml.schema.json')) | ||
|
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| class ProvidersManager: | ||
| """Manages all provider packages.""" | ||
|
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| def __init__(self): | ||
| self._provider_directory = {} | ||
| try: | ||
| from airflow import providers | ||
| except ImportError as e: | ||
| log.warning("No providers are present or error when importing them! :%s", e) | ||
| return | ||
| self._schema = _load_schema() | ||
| self.__find_all_providers(providers.__path__) | ||
|
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| def __find_all_providers(self, paths: str): | ||
| def onerror(_): | ||
| exception_string = traceback.format_exc() | ||
| log.warning(exception_string) | ||
|
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| for module_info in pkgutil.walk_packages(paths, prefix="airflow.providers.", onerror=onerror): | ||
| try: | ||
| imported_module = importlib.import_module(module_info.name) | ||
| except Exception as e: # noqa pylint: disable=broad-except | ||
| log.warning("Error when importing %s:%s", module_info.name, e) | ||
| continue | ||
| try: | ||
| provider = importlib_resources.read_text(imported_module, 'provider.yaml') | ||
| provider_info = yaml.safe_load(provider) | ||
| jsonschema.validate(provider_info, schema=self._schema) | ||
| self._provider_directory[provider_info['package-name']] = provider_info | ||
| except FileNotFoundError: | ||
| # This is OK - this is not a provider package | ||
| pass | ||
| except TypeError as e: | ||
| if "is not a package" not in str(e): | ||
| log.warning("Error when loading 'provider.yaml' file from %s:%s}", module_info.name, e) | ||
| # Otherwise this is OK - this is likely a module | ||
| except Exception as e: # noqa pylint: disable=broad-except | ||
| log.warning("Error when loading 'provider.yaml' file from %s:%s", module_info.name, e) | ||
|
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| @property | ||
| def providers(self): | ||
| """Returns information about available providers.""" | ||
| return self._provider_directory |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| # | ||
| # 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. | ||
| import unittest | ||
|
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| from airflow.providers_manager import ProvidersManager | ||
|
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| ALL_PROVIDERS = [ | ||
| 'apache-airflow-providers-amazon', | ||
| 'apache-airflow-providers-apache-cassandra', | ||
| 'apache-airflow-providers-apache-druid', | ||
| 'apache-airflow-providers-apache-hdfs', | ||
| 'apache-airflow-providers-apache-hive', | ||
| 'apache-airflow-providers-apache-kylin', | ||
| 'apache-airflow-providers-apache-livy', | ||
| 'apache-airflow-providers-apache-pig', | ||
| 'apache-airflow-providers-apache-pinot', | ||
| 'apache-airflow-providers-apache-spark', | ||
| 'apache-airflow-providers-apache-sqoop', | ||
| 'apache-airflow-providers-celery', | ||
| 'apache-airflow-providers-cloudant', | ||
| 'apache-airflow-providers-cncf-kubernetes', | ||
| 'apache-airflow-providers-databricks', | ||
| 'apache-airflow-providers-datadog', | ||
| 'apache-airflow-providers-dingding', | ||
| 'apache-airflow-providers-discord', | ||
| 'apache-airflow-providers-docker', | ||
| 'apache-airflow-providers-elasticsearch', | ||
| 'apache-airflow-providers-exasol', | ||
| 'apache-airflow-providers-facebook', | ||
| 'apache-airflow-providers-ftp', | ||
| 'apache-airflow-providers-google', | ||
| 'apache-airflow-providers-grpc', | ||
| 'apache-airflow-providers-hashicorp', | ||
| 'apache-airflow-providers-http', | ||
| 'apache-airflow-providers-imap', | ||
| 'apache-airflow-providers-jdbc', | ||
| 'apache-airflow-providers-jenkins', | ||
| 'apache-airflow-providers-jira', | ||
| 'apache-airflow-providers-microsoft-azure', | ||
| 'apache-airflow-providers-microsoft-mssql', | ||
| 'apache-airflow-providers-microsoft-winrm', | ||
| 'apache-airflow-providers-mongo', | ||
| 'apache-airflow-providers-mysql', | ||
| 'apache-airflow-providers-odbc', | ||
| 'apache-airflow-providers-openfaas', | ||
| 'apache-airflow-providers-opsgenie', | ||
| 'apache-airflow-providers-oracle', | ||
| 'apache-airflow-providers-pagerduty', | ||
| 'apache-airflow-providers-papermill', | ||
| 'apache-airflow-providers-plexus', | ||
| 'apache-airflow-providers-postgres', | ||
| 'apache-airflow-providers-presto', | ||
| 'apache-airflow-providers-qubole', | ||
| 'apache-airflow-providers-redis', | ||
| 'apache-airflow-providers-salesforce', | ||
| 'apache-airflow-providers-samba', | ||
| 'apache-airflow-providers-segment', | ||
| 'apache-airflow-providers-sendgrid', | ||
| 'apache-airflow-providers-sftp', | ||
| 'apache-airflow-providers-singularity', | ||
| 'apache-airflow-providers-slack', | ||
| 'apache-airflow-providers-snowflake', | ||
| 'apache-airflow-providers-sqlite', | ||
| 'apache-airflow-providers-ssh', | ||
| 'apache-airflow-providers-vertica', | ||
| 'apache-airflow-providers-yandex', | ||
| 'apache-airflow-providers-zendesk', | ||
| ] | ||
|
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|
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| class TestProviderManager(unittest.TestCase): | ||
| def test_providers_are_loaded(self): | ||
| provider_manager = ProvidersManager() | ||
| provider_list = list(provider_manager.providers.keys()) | ||
| provider_list.sort() | ||
| self.assertEqual(ALL_PROVIDERS, provider_list) |