broadcast-service 2.0.0

A lightweight third-party broadcast/pubsub library

broadcast-service

A lightweight python broadcast library. You can easily construct a Broadcast pattern/Publish subscriber pattern through this library.

Features

• A publishing subscriber pattern can be built with a very simple syntax
• Support different application scenarios, such as asynchronous and synchronous
• Provide different syntax writing modes for lambda, callback functions, decorators, etc
• A callback function listens on multiple subscriptions
• Provide publisher dispatch callback manage

Quick Start

• document github-pages
• document gitee-pages
• https://pypi.org/project/broadcast-service/

Setup

pip install broadcast-service

Usage

There is an easy demo to show how to use broadcast-service.

from broadcast_service import broadcast_service

# callback of decorator
@broadcast_service.on_listen('my_topic')
def handle_decorator_msg(params):
    print(f"handle_decorator_msg receive params: {params}")

if __name__ == '__main__':
    info = 'This is very important msg'

    # publish broadcast
    broadcast_service.publish('my_topic', info)

• You can use publish, emit, broadcast to send your topic msg and use listen, on, subscribe to listen your topic msg.

• You can also add more arguments or no argument when you publish thr broadcast.

from broadcast_service import broadcast_service

# subscribe topic
@broadcast_service.on_listen(['my_topic'])
def handle_msg(info, info2):
    print(info)
    print(info2)

if __name__ == '__main__':
    info = 'This is very important msg'
    info2 = 'This is also a very important msg.'

    # publish broadcast
    broadcast_service.publish('my_topic', info, info2)

from broadcast_service import broadcast_service

# subscribe topic
@broadcast_service.on_listen(['my_topic'])
def handle_msg():
    print('handle_msg callback')

if __name__ == '__main__':
    # publish broadcast
    broadcast_service.publish('Test')

You can use config to make publisher callback If you want.

from broadcast_service import broadcast_service


@broadcast_service.on_listen("topic")
def handle_subscriber_callback():
    print("handle_subscriber_callback")


def handle_publisher_callback(*args):
    print("handle_publisher_callback")


if __name__ == '__main__':
    broadcast_service.config(
        num_of_executions=5,
        callback=handle_publisher_callback,
        enable_final_return=True,
        interval=0.1
    ).publish("topic")

Moreover, you can see more example in document.

TODO

• optimize documents and show more examples.
• optimize the syntax expression of broadcast-service
• provide more test cases
• provide the ability to subscribe the topic and callback once
• support for fuzzy subscriptions
• the publisher of the topic can provide a return value
• optimize usage in class ('self' params problem)
• build observer mode
• provide publisher callback when all subscriber have completed callback

Contribution

If you want to contribute to this project, you can submit pr or issue. I am glad to see more people involved and optimize it.