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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