Kombu是否可以发布并订阅多个消费者

将Kombu与RabbitMQ结合使用以实现经典的发布/订阅设计模式。我创建了一个创建主题的生产者：

from kombu import Connection, Exchange, Queue

media_exchange = Exchange('media', 'topic', durable=False)
video_queue = Queue('video', exchange=media_exchange, routing_key='video')

with Connection('amqp://guest:guest@localhost//') as conn:
    producer = conn.Producer(serializer='json')
    producer.publish('Hello World!',
                      exchange=media_exchange, routing_key='video',
                      declare=[video_queue])

然后，我创建了一个要从发布者那里消费的消费者：

from kombu import Connection, Exchange, Queue

media_exchange = Exchange('media', type='topic', durable=False)
video_queue = Queue('video', exchange=media_exchange, routing_key='video')

def process_media(body, message):
    print(body)
    #message.ack()

with Connection('amqp://guest:guest@localhost//') as conn:
    with conn.Consumer(video_queue, callbacks=[process_media]) as consumer:
        # Process messages and handle events on all channels
        while True:
            conn.drain_events()

然后启动两个消费者，每个消费者在一个单独的终端中；两者都等待消息：

terminal 1: python consumer.py
terminal 2: python consumer.py

当我运行生产者时，只有一个消费者收到该消息。