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Make queue with chainable interface from async tasks, then run sequence of tasks
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| from typing import List, Callable | |
| class QueueTask: | |
| task: Callable | |
| _args: tuple = tuple() | |
| _kwargs: dict = dict() | |
| def __init__(self, task: Callable): | |
| self.task = task | |
| def args(self, *args, **kwargs): | |
| self._args = args | |
| self._kwargs = kwargs | |
| return self | |
| async def run(self): | |
| await self.task(*self._args, **self._kwargs) | |
| class QueueRunner: | |
| queue: List[QueueTask] = [] | |
| def task(self, task: Callable): | |
| self.queue.append(QueueTask(task)) | |
| return self | |
| def args(self, *args, **kwargs): | |
| self.queue[-1].args(*args, **kwargs) | |
| return self | |
| async def run(self): | |
| for task in self.queue: | |
| await task.run() |
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| import asyncio | |
| import random | |
| from services.QueueRunner import QueueRunner, QueueTask | |
| async def task(val): | |
| sleep = random.uniform(0.05, 1.0) | |
| print(f'{val} sleeping for {sleep:.2f} seconds') | |
| await asyncio.sleep(sleep) | |
| print(f'{val} woke up') | |
| async def main(): | |
| queue = QueueRunner() | |
| for i in range(10): | |
| queue.task(task).args(i) | |
| await queue.run() | |
| asyncio.run(main()) |
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