Fifth: Python's RABBITMQ message distribution poll

#测试目的: RABBITMQ Message Distribution Polling
#1. Start two receive ports and sleep for 30 seconds in Callbackup.
#2. The send port sends the data.
#3. When the first receive receives the message, the first program aborts immediately.
#4. Check to see if the second receive is received again (normal)

#RabbitMQ queue information will only be canceled after the client acknowledges receipt, otherwise it persists.
#并且体现了RabbitMQ的分发轮询机制, the first one to receive, then to the second, or the first to receive, the second one.

#send   End Import pikacredentials = pika. Plaincredentials (' root ',  ' Password1 ') Connection = pika. Blockingconnection (Pika. Connectionparameters (' 10.3.151.86 ', 5672, '/', credentials)) Channel = connection.channel ()             #通过connection实例创建一个channel管道channel. Queue_declare (queue= ' Hello ')      #在管道中创建一个队列channel. Basic_publish (exchange= ", routing_key= ' hello ', body= ' hello  wfffforld! ') Connection.close () #receive   End Import pikaimport timecredentials = pika. Plaincredentials (' root ',  ' Password1 ') Connection = pika. Blockingconnection (Pika. Connectionparameters (' 10.3.151.86 ', 5672, '/', credentials)) Channel = connection.channel () Channel.queue _declare (queue= ' hello ') def callback (ch,method,properties,body):      #回调函数      time.sleep (           &NBSP);             #增加30秒等待     print (" [x] received %r"  % body)     ch.basic_ack (delivery_tag= Method.delivery_tag)       #通知服务端已确认收到channel. Basic_consume (     callback,    queue= ' Hello ',    # no_ack=true           #默认不写是指返回给服务器是否获取数据成功) print ('  [*] waiting for messages .  to exit press ctrl+c ') channel.start_consuming ()

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Fifth: Python's RABBITMQ message distribution poll