RabbitMQ
introduce
RabbitMQ: 基于AMQP协议标准，采用 Erlang 实现的工业级的消息队列(MQ)服务器 AMQP 0-9-1 (Advanced Message Queuing Protocol) 中间件（允许不同程序协同工作）
concept
路由不会发生争抢消息的情况（和kafka不同消费者使用同样的group会争抢消息的情况不同）
- exchange - route rules (四种类型)
- Direct(routing keys, a message attribute) (default)， 比如amq.direct
- Fanout(bindings) broadcast, 忽略了routing key, 绑定了所有queue。比如amq.fanout
- Topic(wildcard in bindings and routing keys) (#, *)， 比如amq.topic 使用 * ，匹配一个word， 类似 Direct 使用#，匹配任意多words， 类似 Fanout
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Headers(header attributes,key-value format)，比如amq.headers 参数：durable, temporary（rabbitmq关闭时会删除）, and auto delete
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routing key address (binding key（exchange和queue绑定的参数） = routing key（exchange路由的参数）) the routing key acts like a filter. 当一条消息的routing key不匹配任何一个binding key时，消息会被丢弃
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channels ： "lightweight connections that share a single TCP connection".
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virtual hosts 多租户系统 connections, exchanges, queues, bindings, user permissions, policies and some other things belong to virtual hosts, logical groups of entities
process
消息从exchange路由到queue的依据信息： header attribute, routing key, binding key 但不同类型exchange采用不同信息
producer - route(messaging broker) - consumer
Publisher -> (publish) -> Exchange -> (routes) -> Queue -> (consumes) -> Consumer
setup
install erlang, set system environment: ERLANG_HOME
cmd 进入 rabbitmq 下面的 sbin文件夹
1.安装web页面 (localhost:15672 guest/guest， guest用户不能远程登陆))
rabbitmq-plugins.bat enable rabbitmq_management
start rabbitmq : double click rabbitmq-service.bat or rabbitmq-server.bat
2.创建用户
rabbitmqctl.bat add_user admin admin
3.设置管理员
rabbitmqctl.bat set_user_tags admin administrator
4.设置权限
rabbitmqctl.bat set_permissions -p / admin ".*" ".*" ".*"
5.other
rabbitmqctl.bat list_users