| # 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. | |
| """Concurrency concepts that support efficient multi-threading.""" | |
| from concurrent.futures import Executor, ThreadPoolExecutor | |
| from typing import Optional | |
| from pyiceberg.utils.config import Config | |
| class ExecutorFactory: | |
| _instance: Optional[Executor] = None | |
| def get_or_create() -> Executor: | |
| """Return the same executor in each call.""" | |
| if ExecutorFactory._instance is None: | |
| max_workers = ExecutorFactory.max_workers() | |
| ExecutorFactory._instance = ThreadPoolExecutor(max_workers=max_workers) | |
| return ExecutorFactory._instance | |
| def max_workers() -> Optional[int]: | |
| """Return the max number of workers configured.""" | |
| return Config().get_int("max-workers") | |