Are these methods of pub/sub in aioredis equivalent?
2
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()
python redis python-asyncio
asked Nov 24 '18 at 13:17
solstsolst
274
add a comment |
2
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()
python redis python-asyncio
asked Nov 24 '18 at 13:17
solstsolst
274
add a comment |
2
2
2
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()
python redis python-asyncio
asked Nov 24 '18 at 13:17
solstsolst
274
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()
python redis python-asyncio
python redis python-asyncio
asked Nov 24 '18 at 13:17
solstsolst
274
asked Nov 24 '18 at 13:17
solstsolst
274
asked Nov 24 '18 at 13:17
solstsolst
274
asked Nov 24 '18 at 13:17
solstsolst
274
asked Nov 24 '18 at 13:17
solstsolst
274
274
add a comment |
add a comment |
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