python第五十九天-----补上笔记

rabbitmq_server_topic    topic模式

 #!/usr/bin/env python
 #{data} {time}
 #_*_coding:utf-8_*_

 import pika,sys,time
 connection = pika.BlockingConnection(pika.ConnectionParameters(
                'localhost'))
 channel = connection.channel()#管道

 #severity = sys.argv[1] if len(sys.argv) > 1 else 'info'#启动参数 默认无参数为 info 级别
 routing_key= sys.argv[1] if len(sys.argv) > 1 else 'anorrymous.info'#启动参数 默认无参数为 info 级别
 msg=''.join(sys.argv[2:]) or  'info:消息默认发送………'#启动参数 为空，发默认消息
 for i in range(10):
     time.sleep(1)
     channel.basic_publish(exchange='direct_logs',#绑定频道
                           #routing_key=severity,#默认的消息队列级别
                           routing_key=routing_key,#默认的消息队列级别
                           body=msg+str(i),
                           #properties=pika.BasicProperties(delivery_mode=2)#持久化 广播不能使用
                            )
     #print(msg,severity)
     print(msg,routing_key)
 connection.close()
 #channel.close()

topic_client:  可按级别来接收  广播

 #!/usr/bin/env python
 #{data} {time}
 #_*_coding:utf-8_*_

 import pika,time,sys

 connection = pika.BlockingConnection(pika.ConnectionParameters(
                'localhost' ))
 channel = connection.channel()

 channel.exchange_declare(exchange='direct_logs',#定义一个接收的频道
                          type='topic')

 reult=channel.queue_declare(exclusive=True)#随机生成唯一的队列名，会在消息接收后自动删除
 queuename=reult.method.queue#队列名 自动生成

 #severities = sys.argv[1:]
 binding_key = sys.argv[1:]
 #if not severities:
 if not binding_key:
     sys.stderr.write("Usage: %s [info] [warning] [error]\n" % sys.argv[0])#启动接收的消息级别
     sys.exit(1)

 #for severity in severities:#循环接收各级别的消息
 for severity in binding_key:#循环接收各级别的消息
     channel.queue_bind(exchange='direct_logs',
                        queue=queuename,
                        routing_key=severity)

 def callback(ch, method, properties, body):#回调函数
     print('接收消息中…………')
     #time.sleep(5)
     print(" [x] Received %r" % body.decode())
     ch.basic_ack(delivery_tag=method.delivery_tag)

 channel.basic_qos(prefetch_count=1)#同时只处理一个消息
 channel.basic_consume(callback,#接收到消息调用回调函数 callback
                       queue=queuename,
                       #no_ack=True
                        )

 print(' [*] 接收消息中. To exit press CTRL+C')

 channel.start_consuming()#启动消息接收