使用 Kombu 和 RabbitMQ 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])
然后我创建了一个消费者从发布者那里消费:
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消息。