diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..e72bfdd --- /dev/null +++ b/COPYING @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +the GNU General Public License is intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. We, the Free Software Foundation, use the +GNU General Public License for most of our software; it applies also to +any other work released this way by its authors. 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If the Library as you +received it does not specify a version number of the GNU Lesser +General Public License, you may choose any version of the GNU Lesser +General Public License ever published by the Free Software Foundation. + + If the Library as you received it specifies that a proxy can decide +whether future versions of the GNU Lesser General Public License shall +apply, that proxy's public statement of acceptance of any version is +permanent authorization for you to choose that version for the +Library. \ No newline at end of file diff --git a/README.md b/README.md index 9274038..c59578a 100644 --- a/README.md +++ b/README.md @@ -1,14 +1,45 @@ # asyncio-taskpool -Dynamically manage pools of asyncio tasks +**Dynamically manage pools of asyncio tasks** + +## Summary + +A task pool is an object with a simple interface for aggregating and dynamically managing asynchronous tasks. + +With an interface that is intentionally similar to the [`multiprocessing.Pool`](https://docs.python.org/3/library/multiprocessing.html#module-multiprocessing.pool) class from the standard library, the `TaskPool` provides you such methods as `apply`, `map`, and `starmap` to execute coroutines concurrently as [`asyncio.Task`](https://docs.python.org/3/library/asyncio-task.html#task-object) objects. There is no limitation imposed on what kind of tasks can be run or in what combination, when new ones can be added, or when they can be cancelled. + +For a more streamlined use-case, the `SimpleTaskPool` provides an even more intuitive and simple interface at the cost of flexibility. + +If you need control over a task pool at runtime, you can launch an asynchronous `ControlServer` to be able to interface with the pool from an outside process or via a network, and stop/start tasks within the pool as you wish. ## Usage -See [USAGE.md](usage/USAGE.md) +Generally speaking, a task is added to a pool by providing it with a coroutine function reference as well as the arguments for that function. Here is what that could look like: +```python +from asyncio_taskpool import SimpleTaskPool +... +async def work(foo, bar): ... +... +async def main(): + pool = SimpleTaskPool(work, args=('xyz', 420)) + await pool.start(5) + ... + pool.stop(3) + ... + pool.lock() + await pool.gather() + ... +``` + +Since one of the main goals of `asyncio-taskpool` is to be able to start/stop tasks dynamically or "on-the-fly", _most_ of the associated methods are non-blocking _most_ of the time. A notable exception is the `gather` method for awaiting the return of all tasks in the pool. (It is essentially a glorified wrapper around the [`asyncio.gather`](https://docs.python.org/3/library/asyncio-task.html#asyncio.gather) function.) + +For working and fully documented demo scripts see [USAGE.md](usage/USAGE.md). ## Installation -`pip install asyncio-taskpool` +```shell +pip install asyncio-taskpool +``` ## Dependencies @@ -16,9 +47,15 @@ Python Version 3.8+, tested on Linux ## Testing -Install `dev` dependencies or just manually install `coverage` with `pip`. -Run the [`coverage.sh`](coverage.sh) shell script to execute all unit tests and receive the coverage report. +Install `asyncio-taskpool[dev]` dependencies or just manually install `coverage` with `pip`. +Execute the [`./coverage.sh`](coverage.sh) shell script to run all unit tests and receive the coverage report. -## Building from source +## License -Run `python -m build` +`asyncio-taskpool` is licensed under the **GNU LGPL version 3.0** specifically. + +The full license texts for the [GNU GPLv3.0](COPYING) and the [GNU LGPLv3.0](COPYING.LESSER) are included in this repository. If not, see https://www.gnu.org/licenses/. + +## Copyright + +© 2022 Daniil Fajnberg diff --git a/setup.cfg b/setup.cfg index 5e2d782..965f410 100644 --- a/setup.cfg +++ b/setup.cfg @@ -1,17 +1,25 @@ [metadata] name = asyncio-taskpool -version = 0.2.0 +version = 0.2.1 author = Daniil Fajnberg author_email = mail@daniil.fajnberg.de description = Dynamically manage pools of asyncio tasks long_description = file: README.md long_description_content_type = text/markdown +keywords = asyncio, concurrency, tasks, coroutines, asynchronous, server url = https://git.fajnberg.de/daniil/asyncio-taskpool project_urls = Bug Tracker = https://git.fajnberg.de/daniil/asyncio-taskpool/issues classifiers = + Development Status :: 3 - Alpha Programming Language :: Python :: 3 Operating System :: OS Independent + License :: OSI Approved :: GNU Lesser General Public License v3 (LGPLv3) + Intended Audience :: Developers + Intended Audience :: System Administrators + Framework :: AsyncIO + Topic :: Software Development :: Libraries + Topic :: Software Development :: Libraries :: Python Modules [options] package_dir = diff --git a/src/asyncio_taskpool/__init__.py b/src/asyncio_taskpool/__init__.py index 5cef20b..d28d142 100644 --- a/src/asyncio_taskpool/__init__.py +++ b/src/asyncio_taskpool/__init__.py @@ -1,2 +1,23 @@ +__author__ = "Daniil Fajnberg" +__copyright__ = "Copyright © 2022 Daniil Fajnberg" +__license__ = """GNU LGPLv3.0 + +This file is part of asyncio-taskpool. + +asyncio-taskpool is free software: you can redistribute it and/or modify it under the terms of +version 3.0 of the GNU Lesser General Public License as published by the Free Software Foundation. + +asyncio-taskpool is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; +without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +See the GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along with asyncio-taskpool. +If not, see .""" + +__doc__ = """ +Brings the main classes up to package level for import convenience. +""" + + from .pool import TaskPool, SimpleTaskPool from .server import UnixControlServer diff --git a/src/asyncio_taskpool/__main__.py b/src/asyncio_taskpool/__main__.py index d3c7f76..b997fdb 100644 --- a/src/asyncio_taskpool/__main__.py +++ b/src/asyncio_taskpool/__main__.py @@ -1,3 +1,24 @@ +__author__ = "Daniil Fajnberg" +__copyright__ = "Copyright © 2022 Daniil Fajnberg" +__license__ = """GNU LGPLv3.0 + +This file is part of asyncio-taskpool. + +asyncio-taskpool is free software: you can redistribute it and/or modify it under the terms of +version 3.0 of the GNU Lesser General Public License as published by the Free Software Foundation. + +asyncio-taskpool is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; +without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +See the GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along with asyncio-taskpool. +If not, see .""" + +__doc__ = """ +CLI client entry point. +""" + + import sys from argparse import ArgumentParser from asyncio import run diff --git a/src/asyncio_taskpool/client.py b/src/asyncio_taskpool/client.py index c27ac06..5c71f59 100644 --- a/src/asyncio_taskpool/client.py +++ b/src/asyncio_taskpool/client.py @@ -1,3 +1,24 @@ +__author__ = "Daniil Fajnberg" +__copyright__ = "Copyright © 2022 Daniil Fajnberg" +__license__ = """GNU LGPLv3.0 + +This file is part of asyncio-taskpool. + +asyncio-taskpool is free software: you can redistribute it and/or modify it under the terms of +version 3.0 of the GNU Lesser General Public License as published by the Free Software Foundation. + +asyncio-taskpool is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; +without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +See the GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along with asyncio-taskpool. +If not, see .""" + +__doc__ = """ +Classes of control clients for a simply interface to a task pool control server. +""" + + import sys from abc import ABC, abstractmethod from asyncio.streams import StreamReader, StreamWriter, open_unix_connection diff --git a/src/asyncio_taskpool/constants.py b/src/asyncio_taskpool/constants.py index 6716797..4812cda 100644 --- a/src/asyncio_taskpool/constants.py +++ b/src/asyncio_taskpool/constants.py @@ -1,3 +1,24 @@ +__author__ = "Daniil Fajnberg" +__copyright__ = "Copyright © 2022 Daniil Fajnberg" +__license__ = """GNU LGPLv3.0 + +This file is part of asyncio-taskpool. + +asyncio-taskpool is free software: you can redistribute it and/or modify it under the terms of +version 3.0 of the GNU Lesser General Public License as published by the Free Software Foundation. + +asyncio-taskpool is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; +without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +See the GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along with asyncio-taskpool. +If not, see .""" + +__doc__ = """ +Constants used by more than one module in the package. +""" + + PACKAGE_NAME = 'asyncio_taskpool' MSG_BYTES = 1024 CMD_START = 'start' diff --git a/src/asyncio_taskpool/exceptions.py b/src/asyncio_taskpool/exceptions.py index b717de5..f9772d9 100644 --- a/src/asyncio_taskpool/exceptions.py +++ b/src/asyncio_taskpool/exceptions.py @@ -1,3 +1,24 @@ +__author__ = "Daniil Fajnberg" +__copyright__ = "Copyright © 2022 Daniil Fajnberg" +__license__ = """GNU LGPLv3.0 + +This file is part of asyncio-taskpool. + +asyncio-taskpool is free software: you can redistribute it and/or modify it under the terms of +version 3.0 of the GNU Lesser General Public License as published by the Free Software Foundation. + +asyncio-taskpool is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; +without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +See the GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along with asyncio-taskpool. +If not, see .""" + +__doc__ = """ +Custom exception classes used in various modules. +""" + + class PoolException(Exception): pass diff --git a/src/asyncio_taskpool/helpers.py b/src/asyncio_taskpool/helpers.py index 35ccaa4..5bc4168 100644 --- a/src/asyncio_taskpool/helpers.py +++ b/src/asyncio_taskpool/helpers.py @@ -1,3 +1,24 @@ +__author__ = "Daniil Fajnberg" +__copyright__ = "Copyright © 2022 Daniil Fajnberg" +__license__ = """GNU LGPLv3.0 + +This file is part of asyncio-taskpool. + +asyncio-taskpool is free software: you can redistribute it and/or modify it under the terms of +version 3.0 of the GNU Lesser General Public License as published by the Free Software Foundation. + +asyncio-taskpool is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; +without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +See the GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along with asyncio-taskpool. +If not, see .""" + +__doc__ = """ +Miscellaneous helper functions. +""" + + from asyncio.coroutines import iscoroutinefunction from asyncio.queues import Queue from typing import Any, Optional diff --git a/src/asyncio_taskpool/pool.py b/src/asyncio_taskpool/pool.py index 489b0f7..9dcf91c 100644 --- a/src/asyncio_taskpool/pool.py +++ b/src/asyncio_taskpool/pool.py @@ -1,3 +1,36 @@ +__author__ = "Daniil Fajnberg" +__copyright__ = "Copyright © 2022 Daniil Fajnberg" +__license__ = """GNU LGPLv3.0 + +This file is part of asyncio-taskpool. + +asyncio-taskpool is free software: you can redistribute it and/or modify it under the terms of +version 3.0 of the GNU Lesser General Public License as published by the Free Software Foundation. + +asyncio-taskpool is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; +without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +See the GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along with asyncio-taskpool. +If not, see .""" + +__doc__ = """ +This module contains the definitions of the task pool classes. + +A task pool is an object with a simple interface for aggregating and dynamically managing asynchronous tasks. +Generally speaking, a task is added to a pool by providing it with a coroutine function reference as well as the +arguments for that function. + +The `BaseTaskPool` class is a parent class and not intended for direct use. +The `TaskPool` and `SimpleTaskPool` are subclasses intended for direct use. +While the former allows for heterogeneous collections of tasks that can be entirely unrelated to one another, the +latter requires a preemptive decision about the function **and** its arguments upon initialization and only allows +to dynamically control the **number** of tasks running at any point in time. + +For further details about the classes check their respective docstrings. +""" + + import logging from asyncio import gather from asyncio.coroutines import iscoroutine, iscoroutinefunction diff --git a/src/asyncio_taskpool/server.py b/src/asyncio_taskpool/server.py index 15ff01a..77780c2 100644 --- a/src/asyncio_taskpool/server.py +++ b/src/asyncio_taskpool/server.py @@ -1,3 +1,24 @@ +__author__ = "Daniil Fajnberg" +__copyright__ = "Copyright © 2022 Daniil Fajnberg" +__license__ = """GNU LGPLv3.0 + +This file is part of asyncio-taskpool. + +asyncio-taskpool is free software: you can redistribute it and/or modify it under the terms of +version 3.0 of the GNU Lesser General Public License as published by the Free Software Foundation. + +asyncio-taskpool is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; +without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +See the GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along with asyncio-taskpool. +If not, see .""" + +__doc__ = """ +This module contains the task pool control server class definitions. +""" + + import logging from abc import ABC, abstractmethod from asyncio import AbstractServer diff --git a/src/asyncio_taskpool/types.py b/src/asyncio_taskpool/types.py index f0278c0..ac4a871 100644 --- a/src/asyncio_taskpool/types.py +++ b/src/asyncio_taskpool/types.py @@ -1,3 +1,24 @@ +__author__ = "Daniil Fajnberg" +__copyright__ = "Copyright © 2022 Daniil Fajnberg" +__license__ = """GNU LGPLv3.0 + +This file is part of asyncio-taskpool. + +asyncio-taskpool is free software: you can redistribute it and/or modify it under the terms of +version 3.0 of the GNU Lesser General Public License as published by the Free Software Foundation. + +asyncio-taskpool is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; +without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +See the GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along with asyncio-taskpool. +If not, see .""" + +__doc__ = """ +Custom type definitions used in various modules. +""" + + from asyncio.streams import StreamReader, StreamWriter from typing import Any, Awaitable, Callable, Iterable, Mapping, Tuple, TypeVar, Union diff --git a/tests/test_helpers.py b/tests/test_helpers.py index 6f2581a..5dbf657 100644 --- a/tests/test_helpers.py +++ b/tests/test_helpers.py @@ -1,3 +1,24 @@ +__author__ = "Daniil Fajnberg" +__copyright__ = "Copyright © 2022 Daniil Fajnberg" +__license__ = """GNU LGPLv3.0 + +This file is part of asyncio-taskpool. + +asyncio-taskpool is free software: you can redistribute it and/or modify it under the terms of +version 3.0 of the GNU Lesser General Public License as published by the Free Software Foundation. + +asyncio-taskpool is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; +without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +See the GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along with asyncio-taskpool. +If not, see .""" + +__doc__ = """ +Unittests for the `asyncio_taskpool.helpers` module. +""" + + from unittest import IsolatedAsyncioTestCase from unittest.mock import MagicMock, AsyncMock, NonCallableMagicMock diff --git a/tests/test_pool.py b/tests/test_pool.py index bc41e2b..69ff6d0 100644 --- a/tests/test_pool.py +++ b/tests/test_pool.py @@ -1,3 +1,24 @@ +__author__ = "Daniil Fajnberg" +__copyright__ = "Copyright © 2022 Daniil Fajnberg" +__license__ = """GNU LGPLv3.0 + +This file is part of asyncio-taskpool. + +asyncio-taskpool is free software: you can redistribute it and/or modify it under the terms of +version 3.0 of the GNU Lesser General Public License as published by the Free Software Foundation. + +asyncio-taskpool is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; +without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +See the GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along with asyncio-taskpool. +If not, see .""" + +__doc__ = """ +Unittests for the `asyncio_taskpool.pool` module. +""" + + import asyncio from asyncio.exceptions import CancelledError from asyncio.queues import Queue diff --git a/usage/USAGE.md b/usage/USAGE.md index a496cdb..e5c3314 100644 --- a/usage/USAGE.md +++ b/usage/USAGE.md @@ -12,7 +12,7 @@ The following demo code enables full log output first for additional clarity. It import logging import asyncio -from asyncio_taskpool.pool import SimpleTaskPool +from asyncio_taskpool import SimpleTaskPool logging.getLogger().setLevel(logging.NOTSET) logging.getLogger('asyncio_taskpool').addHandler(logging.StreamHandler()) @@ -23,8 +23,8 @@ async def work(n: int) -> None: Pseudo-worker function. Counts up to an integer with a second of sleep before each iteration. In a real-world use case, a worker function should probably have access - to some synchronisation primitive or shared resource to distribute work - between an arbitrary number of workers. + to some synchronisation primitive (such as a queue) or shared resource + to distribute work between an arbitrary number of workers. """ for i in range(n): await asyncio.sleep(1) @@ -91,7 +91,7 @@ The following demo code enables full log output first for additional clarity. It import logging import asyncio -from asyncio_taskpool.pool import TaskPool +from asyncio_taskpool import TaskPool logging.getLogger().setLevel(logging.NOTSET) logging.getLogger('asyncio_taskpool').addHandler(logging.StreamHandler()) @@ -181,7 +181,7 @@ TaskPool-0 is locked! Started TaskPool-0_Task-3 other_work with 9 `starmap` returned -Called `gather` +Called `gather` <--- now this will block `main()` until all tasks have ended work with 160 work with 160 other_work with 10 @@ -229,3 +229,5 @@ other_work with 39 Done. Ended TaskPool-0_Task-5 ``` + +© 2022 Daniil Fajnberg diff --git a/usage/example_server.py b/usage/example_server.py index 6ba867a..e5649ce 100644 --- a/usage/example_server.py +++ b/usage/example_server.py @@ -1,3 +1,25 @@ +__author__ = "Daniil Fajnberg" +__copyright__ = "Copyright © 2022 Daniil Fajnberg" +__license__ = """GNU LGPLv3.0 + +This file is part of asyncio-taskpool. + +asyncio-taskpool is free software: you can redistribute it and/or modify it under the terms of +version 3.0 of the GNU Lesser General Public License as published by the Free Software Foundation. + +asyncio-taskpool is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; +without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +See the GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public License along with asyncio-taskpool. +If not, see .""" + +__doc__ = """ +Working example of a UnixControlServer in combination with the SimpleTaskPool. +Use the main CLI client to interface at the socket. +""" + + import asyncio import logging