Need help getting started

[gitdlam]

Hi sorry about newbie questioin. I've been messing with the basic examples and can't seem to get the effect i want. I just need a basic example of having a subscription setup and then wait forever, not sure if there is already a built in function for this. The Go version is marvelous but here i'm lost.

Many thanks.

[wallyqs]

Hi @gitdlam thanks for the feedback, I will be adding more examples... Here below there is a snippet of how subscriptions work that I can add to the repo. Let me know if it works for you.

import asyncio
from nats.aio.client import Client as NATS

def run(loop):
  nc = NATS()

  options = {
    "servers": ["nats://127.0.0.1:4222"],
    "io_loop": loop
  }

  yield from nc.connect(**options)
  print("Connected to NATS at {}...".format(nc.connected_url.netloc))

  @asyncio.coroutine
  def subscribe_handler(msg):
    subject = msg.subject
    reply = msg.reply
    data = msg.data.decode()
    print("Received a message on '{subject} {reply}': {data}".format(
      subject=subject, reply=reply, data=data))

  # Basic subscription to receive all published messages
  # which are being sent to a single topic 'discover'
  yield from nc.subscribe("discover", cb=subscribe_handler)

  # Subscription on queue named 'workers' so that
  # one subscriber handles a request at a time.
  yield from nc.subscribe("help.*", "workers", subscribe_handler)

if __name__ == '__main__':
  loop = asyncio.get_event_loop()
  loop.run_until_complete(run(loop))
  try:
      loop.run_forever()
  finally:
      loop.close()

[gitdlam]

Thanks @wallyqs for the quick response. This example is perfect!!!

[wallyqs]

Good to hear that it helped, I added a couple more examples to the repo and some basic tools: https://github.com/nats-io/asyncio-nats/blob/master/examples/nats-sub/__main__.py https://github.com/nats-io/asyncio-nats/blob/master/examples/context-manager.py Thanks for the feedback again!