| # | |
| # 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. | |
| # | |
| """A BeamPlugin base class.""" | |
| # pytype: skip-file | |
| class BeamPlugin(object): | |
| """Plugin base class to be extended by dependent users such as FileSystem. | |
| Any instantiated subclass will be imported at worker startup time.""" | |
| @classmethod | |
| def get_all_subclasses(cls): | |
| """Get all the subclasses of the BeamPlugin class.""" | |
| all_subclasses = [] | |
| for subclass in cls.__subclasses__(): | |
| all_subclasses.append(subclass) | |
| all_subclasses.extend(subclass.get_all_subclasses()) | |
| return all_subclasses | |
| @classmethod | |
| def get_all_plugin_paths(cls): | |
| """Get full import paths of the BeamPlugin subclass.""" | |
| def fullname(o): | |
| return o.__module__ + "." + o.__name__ | |
| return [fullname(o) for o in cls.get_all_subclasses()] |