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Message service implementing publisher/subscriber pattern

Project description

APubSub

Build Status Coverage PyPI version GitHub

Simple, single-purpose message service implementation.

Installation

Python versin 3.7+ required

Just install it with pip: pip install apubsub

Usage

from apubsub import Service

service = Service()

# Note that service is started in stand-alone process
# so start it as early as possible to minimize resource pickling*
service.start()

class Klass:

    def __init__(self):
        self.sub = service.get_client()
        await self.sub.start_consuming()  # subscriber should be started
        
        self.pub = service.get_client()  # if used only as publisher, it is not required

    async def do_smth(self):
        data = await self.sub.get(.1)  # fetch received data with timeout
        if data is None:
            print("No data received by subscriber")
            return
        print(data)
    
    async def do_smth_else(self):
        msg = "some string data"
        await self.pub.publish("topic", msg)

    async def use_iter_get(self):
        async for data in self.sub.get_iter():
            print(f"Data received: {data}")

Check out more examples in tests

Project details


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