python第六十天－－－－－RabbitMQ

RabbitMQ消息队列：默认为消息轮循模式，按client端启动是顺序接收

server端

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

 #声明queue
 #channel.queue_declare(queue='hello')#队列名 hello
 channel.queue_declare(queue='hello',durable=True)#队列名 hello,持久化队列

 for i in range(10):

     channel.basic_publish(exchange='',
                           routing_key='hello',
                           body='Hello World!%s'%i,
                           properties=pika.BasicProperties(delivery_mode=2))
     print(" [x] Sent 'Hello World!'",i)
 connection.close()

client端

 import pika,time

 connection = pika.BlockingConnection(pika.ConnectionParameters(
                'localhost'))
 channel = connection.channel()
 #channel.queue_declare(queue='hello')
 channel.queue_declare(queue='hello',durable=True)#队列名 hello,持久化队列

 def callback(ch, method, properties, body):#回调函数
     print('接收消息中…………')
     time.sleep(1)
     print(" [x] Received %r" % body)
     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='hello',
                       #no_ack=True
                        )

 print(' [*] 接收消息中. To exit press CTRL+C')
 channel.start_consuming()#启动消息接收

消息持久化

server端

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

 #声明queue
 channel.queue_declare(queue='hello2',durable=True)#队列名 hello
 #channel.queue_declare(queue='hello2',durable=True)#队列名 hello,持久化队列

 channel.basic_publish(exchange='',
                         routing_key='hello2',
                         body='Hello World!%s---->')
 print(" [x] Sent 'Hello World!'")
 connection.close()

client端

 import pika,time

 connection = pika.BlockingConnection(pika.ConnectionParameters(
                'localhost'))
 channel = connection.channel()
 channel.queue_declare(queue='hello2')#服务端与客户端的设置需一致，不然会报错
 #channel.queue_declare(queue='hello2',durable=True)#队列名 hello,持久化队列

 def callback(ch, method, properties, body):#回调函数
     print('接收消息中…………')
     time.sleep(5)
     print(" [x] Received %r" % body)
     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='hello2',
                       #no_ack=True
                        )

 print(' [*] 接收消息中. To exit press CTRL+C')
 channel.start_consuming()#启动消息接收

fanout广播模式：实时发送，发送时，如果client端没启动将无法收到消息

server端

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

 #声明queue 广播模式不用声明队列
 #channel.queue_declare(queue='hello')#队列名 hello
 #channel.queue_declare(queue='hello',durable=True)#队列名 hello,持久化队列

 argv=input('输入消息')
 msg=''.join(sys.argv[1:]) or  'info:消息默认发送………'
 for i in range(10):
     time.sleep(1)
     channel.basic_publish(exchange='logs',#绑定频道
                           #routing_key='hello',
                           routing_key='',
                           body=msg+str(i),
                           #properties=pika.BasicProperties(delivery_mode=2)#持久化 广播不能使用
                            )
     print(msg,i)
 #connection.close()

client端

 import pika,time

 connection = pika.BlockingConnection(pika.ConnectionParameters(
                'localhost'))
 channel = connection.channel()
 #channel.queue_declare(queue='hello2')#服务端与客户端的设置需一致，不然会报错
 #channel.queue_declare(queue='hello2',durable=True)#队列名 hello,持久化队列
 channel.exchange_declare(exchange='logs',#绑定频道
                          type='fanout')#接收类型
 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
 channel.queue_bind(exchange='logs',#先要绑定频道
                    queue=queuename
                    )

 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

direct广播模式：分级别发送消——客户端可以按级别接收

server端

 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
 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
                           body=msg+str(i),
                           #properties=pika.BasicProperties(delivery_mode=2)#持久化 广播不能使用
                            )
     print(msg,severity)
 connection.close()

client端

 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='direct')

 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:]
 if not severities:
     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
     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

topic细致消息过滤

server端

 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()

client端

 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

RPC模式：结果返回

server端

 import pika
 import time
 connection = pika.BlockingConnection(pika.ConnectionParameters(
         host='localhost'))#生成消息对队

 channel = connection.channel()#生成管道

 channel.queue_declare(queue='rpc_queue')#消息收接的模式

 def fib(n):#计算函数——非波那
     if n == 0:
         return 0
     elif n == 1:
         return 1
     else:
         return fib(n-1) + fib(n-2)

 def on_request(ch, method, props, body):#回调函数
     n = int(body)

     print(" [.] fib(%s)" % n)
     response = fib(n)#调用计算函数

     ch.basic_publish(exchange='',
                      routing_key=props.reply_to,#收消息的队列
                      properties=pika.BasicProperties(correlation_id =props.correlation_id),#返回消息的队列
                      body=str(response))#返回结果数据
     ch.basic_ack(delivery_tag = method.delivery_tag)##确保消息被 客户端接收

 channel.basic_qos(prefetch_count=1)#同时只处理一个消息
 channel.basic_consume(on_request, queue='rpc_queue')#接收消息，自动调用回调函数

 print(" [x] Awaiting RPC requests")
 channel.start_consuming()#开始接收

client端

 import pika
 import uuid

 class FibonacciRpcClient(object):
     def __init__(self):
         self.connection = pika.BlockingConnection(pika.ConnectionParameters(
                 host='localhost'))#生成连接的服务端 ip

         self.channel = self.connection.channel()#创建一个管道

         result = self.channel.queue_declare(exclusive=True)#随机生成一个队列，收消息后自动删除
         self.callback_queue = result.method.queue#赋于管道 变量

         self.channel.basic_consume(self.on_response,#回调函数
                                    no_ack=True,#不用服务端确认本条消息
                                    queue=self.callback_queue)#随机生的队列

     def on_response(self, ch, method, props, body):#回调函数
         if self.corr_id == props.correlation_id:#判断服务端返回的队列名是否与当前所生成的队列名一致
             self.response = body#  将服务端的结果赋于返回来的结果变量

     def call(self, n):#发送消息的函数
         self.response = None#初始返回结果为空
         self.corr_id = str(uuid.uuid4())#生成一个服务端返回消息的队列名
         self.channel.basic_publish(exchange='',
                                    routing_key='rpc_queue',#确认为rpc模式 实时发送
                                    properties=pika.BasicProperties(
                                          reply_to = self.callback_queue,#发送的管道队列名
                                          correlation_id = self.corr_id,#发送给服务端，用于返回消息的队列名
                                          ),
                                    body=str(n))#发送的内容数据
         while self.response is None:
             self.connection.process_data_events()#非阻塞模式接收消息
             print('没有返回消息……')
         return int(self.response)#返回结果

 fibonacci_rpc = FibonacciRpcClient()#生成一个实例

 print(" [x] Requesting fib(10)")
 response = fibonacci_rpc.call(10)#调用发送消息的函数
 print(" [.] Got %r" % response)#打印结果