donald 0.9.0

Donald is here

Donald – A simple task engine for Asyncio.

The main goal for Donald to run async/sync code without blocking main loop.

Donald supports synchronous and asynchronous paradigms. The package is running coroutines and functions in multi loops. Donald could run periodic tasks and listen AMQP queues.

Contents

• Requirements

• Installation

• Usage

  • Connect and receive tasks using AMQP

  • Submit tasks to AMQP

• Bug tracker

• Contributing

• Contributors

• License

Requirements

• python 3.8+

Installation

Donald should be installed using pip:

pip install donald

Usage

From shell:

$ donald --help

From asynchronous python code:

# Init Donald
donald = Donald(
    # Params (default values)
    # -----------------------

    # Run tasks imediatelly in the same process/thread
    fake_mode=False,

    # Number of workers
    num_workers=multiprocessing.cpu_count() - 1,

    # Maximum concurent tasks per worker
    max_tasks_per_worker=100,

    # Ensure that the Donald starts only once (set to filename to lock)
    filelock=None,

    # logging level
    loglevel='INFO',

    # AMQP params
    queue=False,
    queue_name='donald',
    queue_params={},
)

# Schedule periodic tasks
@donald.schedule(crontab_string | seconds_float | datetime_timedelta, *args, **kwargs)
async def task(*args, **kwargs):
    # ...

# Start the donald
await donald.start()

# ...

# Submit a task to donald
donald.submit(corofunction or function, *args, **kwargs)

# Submit and wait for result
result = await donald.submit(corofunction or function, *args, **kwargs)

# Submit a task to queue
queue.submit(corofunction or function, *args, **kwargs)
await donald.queue.submit(corofunction or function, *args, **kwargs)

# note: queue dont support waiting for results

# ...

# Stop the donald
await donald.stop()

Connect and receive tasks using AMQP

donald = Donald()

await donald.start()
await donald.queue.start()

# ...


# Stop the donald
await donald.queue.stop()
await donald.stop()

Submit tasks to AMQP

# Send task to queue
await donald.queue.submit(<coro or func>, *args, **kwargs)

# ...

Bug tracker

If you have any suggestions, bug reports or annoyances please report them to the issue tracker at https://github.com/klen/donald/issues

Contributing

Development of starter happens at github: https://github.com/klen/donald

Contributors

• klen (Kirill Klenov)

License

Licensed under a BSD license.