Are these methods of pub/sub in aioredis equivalent?

There seem to be two methods to do pub/sub:

use channel.wait_message() and channel.get()

use Receiver.iter()

The doc says wait_message() is blocking when waiting for new messages. I did some test with a modified aioredis example and they seem both work and not blocking. Are they equivalent?
Do I need to add a small sleep in the reader? If not how does aioredis handle the poll frequency?

import asyncio

import aioredis

import random

from itertools import count





async def reader(ch):

    # while await ch.wait_message():

    #     msg = await ch.get_json()

    async for msg in ch.iter(encoding='utf-8'):

        print("Got Message:", msg)

        **# await asyncio.sleep(.1)  # is this necessary?**





async def sender(pub):

    while True:

        pub.publish_json('chan:1', ["Hello", "world"])

        await asyncio.sleep(random.randint(1, 5))





async def foo():

    while True:

        print('bar')

        await asyncio.sleep(random.random())





async def main():

    pub = await aioredis.create_redis(

        'redis://localhost')

    sub = await aioredis.create_redis(

        'redis://localhost')



    ch1, = await sub.subscribe('chan:1')

    tsk = asyncio.ensure_future(reader(ch1))

    tsk1 = asyncio.ensure_future(foo())

    tsk2 = asyncio.ensure_future(sender(pub))



    await foo()

    await sub.unsubscribe('chan:1')

    await tsk

    tsk1.cancel()

    await tsk1

    tsk2.cancel()

    await tsk2

    sub.close()

    pub.close()





if __name__ == '__main__':

    asyncio.get_event_loop().run_until_complete(main())



    try:

        pass

    except KeyboardInterrupt:

        for task in asyncio.all_tasks():

            task.cancel()

asked Nov 24 '18 at 13:17

solst

274

add a comment |

There seem to be two methods to do pub/sub:

use channel.wait_message() and channel.get()

use Receiver.iter()

import asyncio

import aioredis

import random

from itertools import count





async def reader(ch):

    # while await ch.wait_message():

    #     msg = await ch.get_json()

    async for msg in ch.iter(encoding='utf-8'):

        print("Got Message:", msg)

        **# await asyncio.sleep(.1)  # is this necessary?**





async def sender(pub):

    while True:

        pub.publish_json('chan:1', ["Hello", "world"])

        await asyncio.sleep(random.randint(1, 5))





async def foo():

    while True:

        print('bar')

        await asyncio.sleep(random.random())





async def main():

    pub = await aioredis.create_redis(

        'redis://localhost')

    sub = await aioredis.create_redis(

        'redis://localhost')



    ch1, = await sub.subscribe('chan:1')

    tsk = asyncio.ensure_future(reader(ch1))

    tsk1 = asyncio.ensure_future(foo())

    tsk2 = asyncio.ensure_future(sender(pub))



    await foo()

    await sub.unsubscribe('chan:1')

    await tsk

    tsk1.cancel()

    await tsk1

    tsk2.cancel()

    await tsk2

    sub.close()

    pub.close()





if __name__ == '__main__':

    asyncio.get_event_loop().run_until_complete(main())



    try:

        pass

    except KeyboardInterrupt:

        for task in asyncio.all_tasks():

            task.cancel()

asked Nov 24 '18 at 13:17

solst

274

add a comment |

There seem to be two methods to do pub/sub:

use channel.wait_message() and channel.get()

use Receiver.iter()

import asyncio

import aioredis

import random

from itertools import count





async def reader(ch):

    # while await ch.wait_message():

    #     msg = await ch.get_json()

    async for msg in ch.iter(encoding='utf-8'):

        print("Got Message:", msg)

        **# await asyncio.sleep(.1)  # is this necessary?**





async def sender(pub):

    while True:

        pub.publish_json('chan:1', ["Hello", "world"])

        await asyncio.sleep(random.randint(1, 5))





async def foo():

    while True:

        print('bar')

        await asyncio.sleep(random.random())





async def main():

    pub = await aioredis.create_redis(

        'redis://localhost')

    sub = await aioredis.create_redis(

        'redis://localhost')



    ch1, = await sub.subscribe('chan:1')

    tsk = asyncio.ensure_future(reader(ch1))

    tsk1 = asyncio.ensure_future(foo())

    tsk2 = asyncio.ensure_future(sender(pub))



    await foo()

    await sub.unsubscribe('chan:1')

    await tsk

    tsk1.cancel()

    await tsk1

    tsk2.cancel()

    await tsk2

    sub.close()

    pub.close()





if __name__ == '__main__':

    asyncio.get_event_loop().run_until_complete(main())



    try:

        pass

    except KeyboardInterrupt:

        for task in asyncio.all_tasks():

            task.cancel()

asked Nov 24 '18 at 13:17

solst

274

There seem to be two methods to do pub/sub:

use channel.wait_message() and channel.get()

use Receiver.iter()

import asyncio

import aioredis

import random

from itertools import count





async def reader(ch):

    # while await ch.wait_message():

    #     msg = await ch.get_json()

    async for msg in ch.iter(encoding='utf-8'):

        print("Got Message:", msg)

        **# await asyncio.sleep(.1)  # is this necessary?**





async def sender(pub):

    while True:

        pub.publish_json('chan:1', ["Hello", "world"])

        await asyncio.sleep(random.randint(1, 5))





async def foo():

    while True:

        print('bar')

        await asyncio.sleep(random.random())





async def main():

    pub = await aioredis.create_redis(

        'redis://localhost')

    sub = await aioredis.create_redis(

        'redis://localhost')



    ch1, = await sub.subscribe('chan:1')

    tsk = asyncio.ensure_future(reader(ch1))

    tsk1 = asyncio.ensure_future(foo())

    tsk2 = asyncio.ensure_future(sender(pub))



    await foo()

    await sub.unsubscribe('chan:1')

    await tsk

    tsk1.cancel()

    await tsk1

    tsk2.cancel()

    await tsk2

    sub.close()

    pub.close()





if __name__ == '__main__':

    asyncio.get_event_loop().run_until_complete(main())



    try:

        pass

    except KeyboardInterrupt:

        for task in asyncio.all_tasks():

            task.cancel()

python redis python-asyncio

asked Nov 24 '18 at 13:17

solst

274

asked Nov 24 '18 at 13:17

solst

274

asked Nov 24 '18 at 13:17

solst

274

asked Nov 24 '18 at 13:17

solst

274

asked Nov 24 '18 at 13:17

solst

274

add a comment |

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