asyncio async/await nsq support
Project description
asyncnsq
async nsq with asyncio
if you dont like the pynsq(which use tornado) way to interact with nsq, then this library may be suitable for you
you can use this library as the common way to write things
Important
-
from version 1.0.0 asyncnsq has a break change in api
-
it is not stable yet
-
you may want to use stable " pip install asyncnsq==0.4.5"
Features
Http Client
- support all the method nsq http supplied
Tcp Client
Connection
- low level connection.
Reader
-
reader from both lookupd for auto finding nsqd
-
list of known nsqd but they can not use together.
-
above two can't use together
Writer
- all the common method for nsqd writer
Next Features
different reader protocol support
more doc to write
more tests
Install
pip install asyncnsq
Usage examples
All you need is a loop, then enjoy. you can refer to examples, as well.
Consumer:
from asyncnsq import create_reader
from asyncnsq.utils import get_logger
loop = asyncio.get_event_loop()
async def go():
try:
reader = await create_reader(
nsqd_tcp_addresses=['127.0.0.1:4150'],
max_in_flight=200)
await reader.subscribe('test_async_nsq', 'nsq')
async for message in reader.messages():
print(message.body)
await message.fin()
except Exception as tmp:
self.logger.exception(tmp)
loop.run_until_complete(go())
Producer:
from asyncnsq import create_writer
loop = asyncio.get_event_loop()
async def go():
writer = await create_writer(host='127.0.0.1', port=4150,
heartbeat_interval=30000,
feature_negotiation=True,
tls_v1=True,
snappy=False,
deflate=False,
deflate_level=0,
loop=loop)
for i in range(100):
await writer.pub('test_async_nsq', 'test_async_nsq:{i}'.format(i=i))
await writer.dpub('test_async_nsq', i * 1000,
'test_delay_async_nsq:{i}'.format(i=i))
loop.run_until_complete(go())
Requirements
-
Python_ 3.6+ https://www.python.org
-
nsq_ http://nsq.io
-
python-snappy
- ubuntu:
- sudo apt-get install libsnappy-dev
- pip install python-snappy
- centos:
- sudo yum install snappy-devel
- pip install python-snappy
- mac:
- brew install snappy # snappy library from Google
- CPPFLAGS="-I/usr/local/include -L/usr/local/lib" pip install python-snappy
- ubuntu:
Running Tests
-
install nsq requirements
- install nsq https://nsq.io/deployment/installing.html
-
install requirements (in a virtual environment)
pip install aiohttp python-snappy
pip install pytest
dev test package if you want autotest support
-
run the auth server in a separate terminal session
python -m aiohttp.web -H localhost -P 8080 asyncnsq.http.auth:create_dev_auth_server
-
run nsq in separate terminal sessions
- if you've built nsq through
make
,cd
into thebuild
directory of nsq ./nsqlookupd
./nsqd --lookupd-tcp-address=localhost:4160 -auth-http-address=localhost:8080
- if you've built nsq through
-
run tests
python runtests.py
example output:
$ python runtests.py test_reader_and_writer decorator test_01_writer (tests.test_reader_and_writer.NsqTest) <_UnixSelectorEventLoop running=False closed=False debug=False> () {} .decorator test_02_reader (tests.test_reader_and_writer.NsqTest) <_UnixSelectorEventLoop running=False closed=False debug=False> () {} . ---------------------------------------------------------------------- Ran 2 tests in 0.260s OK
pytest
just pytest will do all the trick
$ pytest -k test_reader_and_writer ------------------------------------------------------------------------------ live log call ------------------------------------------------------------------------------- DEBUG asyncnsq.tcp:connection.py:82 execute command b'IDENTIFY\n\x00\x00\x00\x1d {"feature_negotiation": true}' DEBUG asyncnsq.tcp:connection.py:239 got nsq data: (0, b'{"max_rdy_count":2500,"version":"1.2.0", "max_msg_timeout":900000,"msg_timeout":60000,"tls_v1":false,"deflate":false,"deflate_level":6, "max_deflate_level":6,"snappy":false,"sample_rate":0,"auth_required":false,"output_buffer_size":16384, "output_buffer_timeout":250}') DEBUG asyncnsq.tcp:connection.py:208 Task is canceled SKIPPED (no auth enabled) [ 75%] tests/test_reader_and_writer.py::NsqTest::test_04_reader_fail_missing_secret ------------------------------------------------------------------------------ live log call ------------------------------------------------------------------------------- DEBUG asyncnsq.tcp:connection.py:82 execute command b'IDENTIFY\n\x00\x00\x00\x1d {"feature_negotiation": true}' DEBUG asyncnsq.tcp:connection.py:239 got nsq data: (0, b'{"max_rdy_count":2500,"version":"1.2.0", "max_msg_timeout":900000,"msg_timeout":60000,"tls_v1":false,"deflate":false,"deflate_level":6, "max_deflate_level":6,"snappy":false,"sample_rate":0,"auth_required":false,"output_buffer_size":16384, "output_buffer_timeout":250}') DEBUG asyncnsq.tcp:connection.py:208 Task is canceled SKIPPED (no auth enabled) [100%] =============================================================== 2 passed, 2 skipped, 39 deselected in 0. 65s ================================================================
License
The asyncnsq is offered under MIT license.
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