What is Exchange in RABBITMQ

The x in is the Exchange

P is producer, red is queue

X can filter the task of p to decide what to do with the task: for example:

(1), discard the task

(2) To send tasks to a task

(3), send the task to all task

There are 4 types of exchange:Direct, Topic, Headers andfanout

This time the main use of fanout

Emit_log.py:task will be sent to exchange

#-*-Coding:utf-8-*-import pikaif __name__ = = ' __main__ ': Connection = Pika. Blockingconnection (Pika. Connectionparameters ("localhost")) Channel = Connection.channel () channel.exchange_declare (exchange= "Logs", type= "    Fanout ") message =" You are awsome! " For I in range (0, 100): # Loop 100 times Send Message Channel.basic_publish (exchange= "Logs", routing_key= ", Body=message +" "+ S TR (i),) print "Sending", message

receive_log.py

# -*- coding: utf-8 -*-import  pika__author__ =  ' Yue ' Def callback (ch, method, properties, body):     print bodyif __name__ ==  ' __main__ ':     connection= Pika. Blockingconnection (Pika. Connectionparameters ("localhost"))     channel=connection.channel ()      Channel.exchange_declare (exchange= "Logs", type= "Fanout")      #随机生成Queue      result=channel.queue_declare (exclusive=true)      #获取queue的name      queue_name=result.method.queue    print  "Queue_name",queue_name     channel.queue_bind (exchange= "Logs", Queue=queue_name)     channel.basic_consume ( callback,queue=queue_name,no_ack=true)     channel.start_consuming () 

What is Exchange in RABBITMQ