aiocronjob 0.2.6

Schedule async tasks and manage them using a REST API or WEB UI

aiocronjob

Schedule and run asyncio coroutines and manage them from a web interface or programmatically using the rest api.

Requires python >= 3.6

How to install

pip3 install aiocronjob

Usage example

# examples/simple_tasks.py

import asyncio

from aiocronjob import manager, Job
from aiocronjob import run_app


async def first_task():
    for i in range(20):
        print("first task log", i)
        await asyncio.sleep(1)


async def second_task():
    for i in range(10):
        await asyncio.sleep(1.5)
        print("second task log", i)
    raise Exception("second task exception")


manager.register(first_task, name="First task", crontab="22 * * * *")

manager.register(second_task, name="Second task", crontab="23 * * * *")


async def on_job_exception(job: Job, exc: BaseException):
    print(f"An exception occurred for job {job.name}: {exc}")


async def on_job_cancelled(job: Job):
    print(f"{job.name} was cancelled...")


async def on_startup():
    print("The app started.")


async def on_shutdown():
    print("The app stopped.")


manager.set_on_job_cancelled_callback(on_job_cancelled)
manager.set_on_job_exception_callback(on_job_exception)
manager.set_on_shutdown_callback(on_shutdown)
manager.set_on_startup_callback(on_startup)

if __name__ == "__main__":
    run_app()

After running the app, the FastAPI server runs at localhost:5000.

Web Interface

Open localhost:5000 in your browser:

Rest API

Open localhost:5000/docs for endpoints docs.

curl example:

$ curl http://0.0.0.0:5000/api/jobs

[
  {
    "name": "First task",
    "next_run_in": "3481.906931",
    "last_status": "pending",
    "enabled": "True",
    "crontab": "22 * * * *",
    "created_at": "2020-06-06T10:20:25.118630+00:00",
    "started_at": null,
    "stopped_at": null
  },
  {
    "name": "Second task",
    "next_run_in": "3541.904723",
    "last_status": "error",
    "enabled": "True",
    "crontab": "23 * * * *",
    "created_at": "2020-06-06T10:20:25.118661+00:00",
    "started_at": "2020-06-06T10:23:00.000906+00:00",
    "stopped_at": "2020-06-06T10:23:15.004351+00:00"
  }
]

Development

Requirements:

• Python >= 3.6 and Poetry for backend
• npm for frontend

The frontend is a separate Single Page Application (SPA), so the backend does not depend on it. It just calls the backend's API endpoints.

Install backend dependencies (Python)

$ git clone https://github.com/devtud/aiocronjob.git

$ cd aiocronjob

$ poetry install

Run backend tests

poetry run pytest --cov -s

Run backend example

poetry run python examples/simple_tasks.py

uvicorn will run the FastAPI app at http://localhost:5000.

Install frontend dependencies (React SPA)

Open another terminal tab in the project root.

$ cd src/webapp

$ npm i

Run frontend tests

npm test

Let frontend know about backend

Create .env file with the content from .env.example file to let the frontend know that the backend is running at http://localhost:5000.

cp .env.example .env

Serve frontend

npm start

A React app starts at http://localhost:3000.

You should now be able to view the example jobs in your browser at http://localhost:3000.