python 消息队列-rabbitMQ 和 redis介绍使用-数据库

1、rabbitMQ 与ptyhon 进程queue 区别。进程queue 主要用户Python父子进程之间或者统一进程不同子进程。rabbit可以用户不同语言之前的相互交流，socket可以实现同样功能，但是较为复杂。

2、 rabbitMQ 消息轮训。一个生产者对多个消费者时候。会自动将消息轮训给不同消费者。

# Author : xiajinqi

import pika

connetction = pika.BlockingConnection(pika.ConnectionParameters("localhost"))

channel = connetction.channel()

channel.queue_declare(queue='hello')
#  1个生产着，三个消费者，会自动轮训，其中一个消费者宕机后，消息会自动发给其他消费者处理。
channel.basic_publish(exchange='',routing_key='hello',body='hello world!')

print("消息已经发送")

channel.close()



# Author : xiajinqi
import pika
import time

connetction = pika.BlockingConnection(pika.ConnectionParameters("localhost"))

channel = connetction.channel()

channel.queue_declare(queue='hello')  #避免生产者后启动，没有这个队列报错。所以在此申明

def  callback(ch,method,properties,body):
    '''
    :param ch:  管道对象内存地址
    :param method: 发消息给谁的申明信息
    :param properties:
    :param body:
    :return:
    '''
    print(ch,method,properties,body)
    ch.basic_ack(delivery_tag=method.delivery_tag)  #执行完以后告诉服务端
   # time.sleep(30)
    pass

## 申明收到调用callbak处理  no_ack 默认为false消息不会丢失，表示需要客户端回调函数处理完，主动告诉服务端已经处理完。为true断电消息会丢失
#channel.basic_consume(callback,queue='hello',no_ack='True')
channel.basic_consume(callback,queue='hello')

print("开始收消息")

channel.start_consuming()

3、服务端消息持久化声明

channel.queue_declare(queue='hello1',durable='True') # durable队列持久化申明
#  1个生产着，三个消费者，会自动轮训，其中一个消费者宕机后，消息会自动发给其他消费者处理。
#delivery_mode 消息持久化声明
channel.basic_publish(exchange='',routing_key='hello1',body='hello world!',properties=pika.BasicProperties(delivery_mode=2))

4、消息轮训，机器性能不同时候，可能要求每个机器权重不一样。实现机制如下。prefetch_count =1 只要有消息没有处理完。自动转化给其他人

# Author : xiajinqi
import pika
import time

connetction = pika.BlockingConnection(pika.ConnectionParameters("localhost"))

channel = connetction.channel()

channel.queue_declare(queue='hello2',durable="True")  #避免生产者后启动，没有这个队列报错。所以在此申明

def  callback(ch,method,properties,body):
    '''
    :param ch:  管道对象内存地址
    :param method: 发消息给谁的申明信息
    :param properties:
    :param body:
    :return:
    '''
    print(ch,method,properties,body)
    ch.basic_ack(delivery_tag=method.delivery_tag)  #执行完以后告诉服务端
   # time.sleep(30)
    pass


#channel.basic_consume(callback,queue='hello',no_ack='True')
channel.basic_consume(callback,queue='hello2')

channel.basic_qos(prefetch_count=1) 
print("开始收消息")

channel.start_consuming()

5、exchange 中的fanout模式，广播模式。服务端生成一个交换器exchange（广播台开始广播）。客户端每次随机生成一个队列（收音机）。然后绑定exchange。

广播模式中。会发给所有绑定exchange的队列。消息不会缓存。类似于广播。消息是实时的。即广播时候。用户不在消息不缓存。用户不在线。消息依旧发送

# Author : xiajinqi

import pika

connetction = pika.BlockingConnection(pika.ConnectionParameters("localhost"))

channel = connetction.channel()

#channel.queue_declare(queue='hello1',durable='True') #
channel.exchange_declare(exchange='logs',exchange_type='fanout')

channel.basic_publish(exchange='logs',routing_key='',body='hello world!',properties=pika.BasicProperties(delivery_mode=2))

print("消息已经发送")

channel.close()
#E:\RB\rabbitmq_server-3.7.7\sbin\rabbitmqctl.bat list_queues



# Author : xiajinqi
import pika
import time

connetction = pika.BlockingConnection(pika.ConnectionParameters("localhost"))

channel = connetction.channel()

#channel.queue_declare(queue='hello2',durable="True")  #避免生产者后启动，没有这个队列报错。所以在此申明

channel.exchange_declare(exchange='logs',exchange_type='fanout')

result = channel.queue_declare(exclusive='True') #客户端每次启动会随机生成一个队列
queue_name = result.method.queue  #  获取随机生成的队列名


# exchange 绑定 queue
channel.queue_bind(exchange='logs',queue=queue_name)

def  callback(ch,method,properties,body):
    '''
    :param ch:  管道对象内存地址
    :param method: 发消息给谁的申明信息
    :param properties:
    :param body:
    :return:
    '''
    print(ch,method,properties,body)
    ch.basic_ack(delivery_tag=method.delivery_tag)  #执行完以后告诉服务端
   # time.sleep(30)
    pass

## 申明收到调用callbak处理  no_ack 默认为false消息不会丢失，表示需要客户端回调函数处理完，主动告诉服务端已经处理完。为true断电消息会丢失
#channel.basic_consume(callback,queue='hello',no_ack='True')
channel.basic_consume(callback,queue=queue_name)

channel.basic_qos(prefetch_count=1)
print("开始收消息")

channel.start_consuming()

6、direct 模式。

# Author : xiajinqi

import pika
import sys
connetction = pika.BlockingConnection(pika.ConnectionParameters("localhost"))

channel = connetction.channel()

#channel.queue_declare(queue='hello1',durable='True') #
channel.exchange_declare(exchange='direct_logs',exchange_type='direct')

serverity =  sys.argv[1]  if len(sys.argv)> 1 else 'info'
message = ''.join(sys.argv[2:]) or 'hello world'

channel.basic_publish(exchange='direct_logs',routing_key=serverity,body=message,properties=pika.BasicProperties(delivery_mode=2))

print("消息已经发送")

channel.close()


# Author : xiajinqi
import pika
import time
import sys
connetction = pika.BlockingConnection(pika.ConnectionParameters("localhost"))

channel = connetction.channel()

#channel.queue_declare(queue='hello2',durable="True")  #避免生产者后启动，没有这个队列报错。所以在此申明


channel.exchange_declare(exchange='direct_logs',exchange_type='direct')

result = channel.queue_declare(exclusive='True') #客户端每次启动会随机生成一个队列

channel.exchange_declare(exchange='direct_logs',exchange_type='direct')

serverity =  sys.argv[1:]

if not serverity:
    print("退出")
    sys.exit()


queue_name = result.method.queue  #  获取随机生成的队列名



for st in serverity:
    channel.queue_bind(exchange='direct_logs', queue=queue_name,routing_key=st)






def  callback(ch,method,properties,body):
    '''
    :param ch:  管道对象内存地址
    :param method: 发消息给谁的申明信息
    :param properties:
    :param body:
    :return:
    '''
    print(ch,method,properties,body)
    ch.basic_ack(delivery_tag=method.delivery_tag)  #执行完以后告诉服务端
   # time.sleep(30)
    pass

## 申明收到调用callbak处理  no_ack 默认为false消息不会丢失，表示需要客户端回调函数处理完，主动告诉服务端已经处理完。为true断电消息会丢失
#channel.basic_consume(callback,queue='hello',no_ack='True')
channel.basic_consume(callback,queue=queue_name)

channel.basic_qos(prefetch_count=1)
print("开始收消息")

channel.start_consuming()

7、topic 模式和 direct 可以动态匹配

# Author : xiajinqi

import pika
import sys
connetction = pika.BlockingConnection(pika.ConnectionParameters("localhost"))

channel = connetction.channel()

#channel.queue_declare(queue='hello1',durable='True') #
channel.exchange_declare(exchange='direct_logs',exchange_type='topic')

serverity =  sys.argv[1]  if len(sys.argv)> 1 else 'info'
message = ''.join(sys.argv[2:]) or 'hello world'

channel.basic_publish(exchange='direct_logs',routing_key=serverity,body=message,properties=pika.BasicProperties(delivery_mode=2))

print("消息已经发送")

channel.close()

8、

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