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async-worker

O projeto tem como objetivo ser um framework para escrever workers assíncronos em python. Por worker entende-se qualquer aplicação que rode por tempo indeterminado e que receba estímulos de várias origens diferentes. Essas orignes podem ser:

  • Uma mensagem em um broker, como RabbitMQ;
  • Um evento recorrente gerado em um intervalo fixo de tempo;
  • Uma requisição HTTP
  • ...

Documentação: https://async-worker.github.io/async-worker/

Exemplos rápidos

Abaixo estão alguns exemplos bem simples que dão uma ideia do projeto e de como fica um código escrito com async-worker.

Handler HTTP

from aiohttp import web

from asyncworker import App

app = App()


@app.http.get(["/", "/other"])
async def handler():
    return web.json_response({})


app.run()

Esse handler recebe reqisições HTTP (GET) nos seguintes endereços (por padrão): http://127.0.0.1:8080/ e http://127.0.0.1:8080/other

Handler RabbitMQ

from typing import List

from asyncworker import App
from asyncworker.connections import AMQPConnection
from asyncworker.options import Options
from asyncworker.rabbitmq import RabbitMQMessage, AMQPRouteOptions

amqp_conn = AMQPConnection(
    hostname="127.0.0.1",
    username="guest",
    password="guest",
    prefetch_count=1024,
)

app = App(connections=[amqp_conn])


@app.amqp.consume(
    ["queue", "queue-2"], options=AMQPRouteOptions(bulk_size=512)
)
async def handler(messages: List[RabbitMQMessage]):
    print(f"Received {len(messages)} messages")
    for m in messages:
        await amqp_conn.put(
            data=m.body, exchange="other", routing_key="another-routing-key"
        )


@app.run_every(1)
async def produce(app: App):
    await amqp_conn.put(data={"msg": "ok"}, routing_key="queue")


app.run()

Esse handler recebe mensagens das filas queue e queue-2 em lotes de 512 mensagens. Se essas duas filas demorarem mais de 60 segundos para acumular, juntas, 1024 mensagens o handler será chamado imediatamente com a quantidade de mensagens que estiver disponível no momento.

O que esse handler está fazendo é apenas pegar todas as mensagens que ele recebe e enviar para o exchange="", routing_key="queue".


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Release files for async-worker 0.20.2

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Source distribution for async-worker 0.20.2
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