rabbitmq简单了解
参考:https://www.rabbitmq.com/install-windows-manual.html
 
1. 安装
(1)简介
安装rabbitmq需要先安装erlang语言运行环境,因为rabbitmq是使用erlang语言编写的,如果
不安装erlang,在启动rabbitmq时会报ERLANG_HOME not set correctly. (windows环境下)。
erlang语言是一种通用的并发程序设计语言,也是运行于虚拟机之上的一种解释型语言,最早
由爱立信实验室研发,后开源,涵盖函数式、并行及分布式。
 
(2)安装erlang环境
erlang官网:https://www.erlang.org/downloads
erlang下载:http://erlang.org/download/otp_win64_23.0.exe  (88M大小,磁盘空间300M+)
ERLANG_HOME:D:\erlang\erl-23.0 (rabbitmq batch文件会执行%ERLANG_HOME%\bin\erl.exe.)
 
(3)下载rabbitmq
我下载的是zip包,名字是rabbitmq-server-windows-3.8.6.zip。
下载地址:https://github.com/rabbitmq/rabbitmq-server/releases/download/v3.8.6/rabbitmq-server-windows-3.8.6.zip
 
(4)同步erlang cookie -- 跳过此步骤
erlang cookie是一个在rabbitmq节点和cli工具之间共享的密钥,这个值存储在erlang cookie文件中。
在使用rabbitmqctl.bat启动时会使用到这个cookie文件,并且集群中所有节点必须使用相同的cookie值。
 
(5)运行方式
rabbitmq执行脚本在rabbitmq_server-3.8.6\sbin目录下。
rabbitmq可以以application形式运行,也可以以service形式运行。
rabbitmq-server.bat 以application形式运行;
rabbitmq-service.bat 以service形式运行;
rabbitmqctl.bat 管理中间件
 
(6)节点数据存储
存储目录:C:\Documents and Settings\%USERNAME%\Application Data
          C:\Users\%USERNAME%\AppData\Roaming 
想确定具体是上面哪个目录可以在cmd下输入:echo %APPDATA%
 
(7)以app方式启动
cmd执行:rabbitmq-server.bat    (想要后台运行,可以加-detached参数)
报错:BOOT FAILED ERROR: epmd error for host JALCHU-6JT6N: address (cannot connect to host/port)
参考:https://stackoverflow.com/questions/38343656/epmd-error-for-host-myhost-address-cannot-connect-to-host-port-on-windows-10
解决办法:添加环境变量,RABBITMQ_NODENAME=rabbit@localhost,添加后重新执行rabbitmq-server.bat即可。
查看状态:rabbitmqctl.bat status
关闭:rabbitmqctl.bat stop
 
(8)以windows service方式启动
cmd执行:rabbitmq-service.bat install
报错:Unable to register RabbitMQ service with service manager.Error: Access is denied.
解决办法:一般我们打开cmd默认都是普通用户,我们可以在左下角搜索cmd然后以管理员身份打开cmd窗口即可。
查看:cmd执行services.msc可以看到RabbitMQ service,右键启动。
一些基本命令
rabbitmq-service help    - Display this help
rabbitmq-service install - Install the RabbitMQ service
rabbitmq-service remove  - Remove the RabbitMQ service
rabbitmq-service start   - Start the RabbitMQ service
rabbitmq-service stop    - Stop the RabbitMQ service
rabbitmq-service disable - Disable the RabbitMQ service
rabbitmq-service enable  - Enable the RabbitMQ service
 
(9)启用管理插件
启用插件,cmd执行:rabbitmq-plugins.bat enable rabbitmq_management
禁用插件,cmd执行:rabbitmq-plugins.bat disable rabbitmq_management
在service启动前提下启用插件,浏览器输入http://127.0.0.1:15672/,
初始登录默认用户名和密码都是guest
进入后可以看到当前节点的一些配置,如Memory,Disk space
import pika
 
 
def emit_log_topic():
    connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
    channel = connection.channel()
    channel.exchange_declare(exchange='topic_logs', exchange_type='topic')
    routing_key = 'test'  # bind message key
    message = 'Hello World123!'  # bind message
    channel.basic_publish(exchange='topic_logs', routing_key=routing_key, body=message)
    print(" [Producer] sent %r:%r" % (routing_key, message))
    connection.close()
 
 
if __name__ == '__main__':
    print('start pika producer...')
    emit_log_topic()
import pika
 
 
def receive_logs_topic():
    credentials = pika.credentials.PlainCredentials(
        username='guest',
        password='guest'
    )
    connection_params = pika.ConnectionParameters(
        host='localhost',
        port=5672,
        connection_attempts=5,
        retry_delay=5,
        credentials=credentials
    )
    connection = pika.BlockingConnection(connection_params)
    channel = connection.channel()
    channel.exchange_declare(exchange='topic_logs', exchange_type='topic')
    result = channel.queue_declare('', exclusive=True)
    queue_name = result.method.queue
 
    for binding_key in ['test']:  # receive message key
        channel.queue_bind(
            exchange='topic_logs', queue=queue_name, routing_key=binding_key)
    print('[*] Waiting for logs. To exit press CTRL+C')
 
    channel.basic_consume(queue=queue_name, on_message_callback=callback, auto_ack=True)
    channel.start_consuming()
 
 
def callback(channel, method, properties, body):
    print(" [Consumer] receive %r" % body)
 
 
if __name__ == '__main__':
    print('start pika consumer...')
    receive_logs_topic()
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