【RabbitMQ】
主要内容
- AMQP 简介
- RabbitMQ 简介
- RabbitMQ 原理
- Erlang 安装
- 安装 RabbitMQ
- RabbitMQ 账户管理
- 交换器
学习目标
一、 AMQP 简介
1 AMQP 是什么?
AMQP(Advanced Message Queuing Protocol,高级消息队列协议)是进程之间传递异步消息的网络协议。
2 AMQP 工作过程
发布者(Publisher)发布消息(Message),经过交换机(Exchange),交换机根据路由规则将收到消息分发给交换机绑定的队列(Queue),最后 AMQP 代理会将消息投递给订阅了此队列的消费者,或者消费者按照需求自行获取。
3 队列
队列是数据结构中概念。数据存储在一个队列中,数据是有顺序的,先进的先出,后进后出。其中一侧负责进数据,另一次负责出数据。
MQ(消息队列)很多功能都是基于此队列结构实现的
二、 RabbitMQ 简介
1 RabbitMQ 介绍
RabbitMQ 是由 Erlang 语言编写的基于 AMQP 的消息中间件。而消息中间件作为分布式系统重要组件之一,可以解决应用耦合,异步消息,流量削峰等问题。
1.1 解决应用耦合
1.1.1 不使用 MQ 时
1.1.2 使用 MQ 解决耦合
2 RabbitMQ 适用场景
同步转异步,并发并行转并发串行
排队算法、秒杀活动、消息分发、异步处理、数据同步、处理耗时任务、流量销峰等。
三、 RabbitMQ 原理
四、 Erlang 安装
RabbitMQ 是使用 Erlang 语言编写的,所以需要先配置 Erlang
1 修改主机名
RabbitMQ 是通过主机名进行访问的,必须指定能访问的主机名。
vim /etc/sysconfig/network
vim /etc/hosts
新添加了一行,前面为服务器 ip,空格后面添加计算机主机名
IP地址和主机名之间要有一个以上的空格
2 安装依赖
yum -y install make gcc gcc-c++ kernel-devel m4 ncurses-devel openssl-devel unixODBC unixODBC-devel
BUG:
换源内容如下:
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
[BaseOS]
name=CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
[BaseOS]
name=CentOS-$releasever - Base
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/BaseOS/$basearch/os/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=BaseOS&infra=$infra
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
[AppStream]
name=CentOS-$releasever - AppStream
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/AppStream/$basearch/os/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=AppStream&infra=$infra
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
[PowerTools]
name=CentOS-$releasever - PowerTools
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/PowerTools/$basearch/os/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=PowerTools&infra=$infra
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/extras/$basearch/os/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/centosplus/$basearch/os/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=BaseOS&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$releasever/BaseOS/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
3 上传并解压
上传 otp_src_22.0.tar.gz 到/usr/local/tmp 目录中,进入目录并解压。
解压时注意,此压缩包不具有 gzip 属性,解压参数没有 z,只有 xf
cd /usr/local/upload
tar xf otp_src_22.0.tar.gz
4 配置参数
先新建/usr/local/erlang 文件夹,作为安装文件夹
mkdir -p /usr/local/erlang
-p 表示递归
配置参数
./configure --prefix=/usr/local/erlang --with-ssl --enable-threads --enable-smp-support --enable-kernel-poll --enable-hipe --without-javac
5 编译并安装
编译
make
安装
make install
&& :先执行命令,执行完之后立即执行下一个命令
先编译,编译成功之后立即安装
make && make install
查看安装结果
查看安装的版本
6 修改环境变量
修改/etc/profile 文件
vim /etc/profile
在文件中添加下面代码
export PATH=$PATH:/usr/local/erlang/bin
使配置文件生效
语言环境安装完成
五、 安装 RabbitMQ
1 上传并解压
上传 rabbitmq-server-generic-unix-3.7.17.tar.xz 到/usr/loca/upload 中
cd /usr/local/upload
tar -xf rabbitmq-server-generic-unix-3.7.17.tar.xz
2 复制到 local 下
复制解压文件到/usr/local 下,命名为 rabbitmq
cp -r rabbitmq_server-3.7.17 /usr/local/rabbitmq
3 配置环境变量
vim /etc/profile
在文件中添加
export PATH=$PATH:/usr/local/rabbitmq/sbin
解析文件
source /etc/profile
4 开启 web 管理插件
进入 rabbitmq/sbin 目录
cd /usr/local/rabbitmq/sbin
查看插件列表
./rabbitmq-plugins list
生效管理插件
./rabbitmq-plugins enable rabbitmq_management
如果安装的插件生效了会在rabbit安装目录的etc目录下生成一个配置文件 enable_plugins
5 后台运行
启动 rabbitmq。
./rabbitmq-server -detached
启动成功信息如下:
./rabbitmqctl stop_app
停止命令,如果无法停止,使用 kill -9 进程号进行关闭
BUG:
客户端代码和tcp协议开放的端口为5672 对http协议开放的端口为15672
5.1 启动错误解决
如果启动 RabbitMQ 发生下述错误,可以提供环境配置文件,解决。环境配置文件命
名为: rabbitmq-env.conf。所在位置是: $rabbitmq_home/etc/rabbitmq/目录。
内容是: HOSTNAME=主机名称
6 查看 web 管理界面
默认可以在安装 rabbitmq 的电脑上通过用户名:guest 密码 guest 进行访问 web 管理界面
端口号:15672(放行端口,或关闭防火墙)
在虚拟机浏览器中输入:
http://localhost:15672
六、 RabbitMq 账户管理
1 创建账户
语法:./rabbitmqctl add_user username password
cd /usr/local/rabbitmq/sbin
./rabbitmqctl add_user admin admin
2 给用户授予管理员角色
其中 smallming 为新建用户的用户名
./rabbitmqctl set_user_tags admin administrator
3 给用户授权
“/” 表示 RabbitMQ 根虚拟主机
admin 表示用户名
“." ".” “.*” 表示完整权限
./rabbitmqctl set_permissions -p “/” admin “." ".” “.*”
4 登录
使用新建账户和密码在 windows 中访问 rabbitmq 并登录
在浏览器地址栏输入:
http://ip:15672/
用户名:admin
密码:admin
七、 Exchange 交换器(交换机)
交换器负责接收客户端传递过来的消息,并转发到对应的队列中。在 RabbitMQ 中支持四种交换器
-
Direct Exchange:直连交换器(默认)
-
Fanout Exchange:扇形交换器
-
Topic Exchange:主题交换器 可以实现所有功能
-
Header Exchange:首部交换器。
在 RabbitMq 的 Web 管理界面中 Exchanges 选项卡就可以看见这四个交换器。
1 direct 交换器
点对点,对应唯一一个Queue
如果有多个consumer消费同一个Queue默认使用轮询机制(公平调度)让所有的consumer依次消费消息,轮询轮的不是位置顺序而是下一个空闲消费者,哪个消费者先执行完则优先执行下一个消息
**direct 交换器是 RabbitMQ 默认交换器。**默认会进行公平调度。所有接受者依次从消息队列中获取值。Publisher 给哪个队列发消息,就一定是给哪个队列发送消息。对交换器绑定的其他队列没有任何影响。
(代码演示)一个队列需要绑定多个消费者
需要使用注解/API:
org.springframework.amqp.core.Queue:队列
AmqpTemplate:操作 RabbitMQ 的接口。负责发送或接收消息
@RabbitListener(queues = “”) 注解某个方法为接收消息方法
1.1 代码实现
1.1.1 新建项目 Publisher
amqp_rabbit/pm.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.bjsxt</groupId>
<artifactId>amqp_rabbit</artifactId>
<packaging>pom</packaging>
<version>1.0-SNAPSHOT</version>
<modules>
<module>amqp_rabbit_consumer</module>
</modules>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>2.2.5.RELEASE</version>
<scope>import</scope>
<type>pom</type>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<!--Springboot提供的关于AMQP协议实现的启动器,可以使用AMQP快速访问MQ消息中间件-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-amqp</artifactId>
</dependency>
</dependencies>
</project>
创建子模块
package com.bjsxt.rabbit.consumer;
import org.springframework.amqp.rabbit.annotation.*;
import org.springframework.stereotype.Component;
/**
* 日志消息消费者,只消费Info日志
* 日志消息存储在队列 log-info-queue
* 使用的交换器名称是 log-ex-direct
* 交换器类型是 direct
* 队列的路由键是 direct-rk-info
* <p>
* 以上名称都是自定义
*
* @RabbitListener - 监听注解。可以描述类型和方法
* 类型 - 当前类型监听某个队列
* 方法 - 当前方法监听某个队列
* 属性 -
* bindings - @QueueBinding[]类型,代表这个类型或方法监听的队列,交换器,路由键的绑定方式
*
* @QueueBinding -
* 属性 -
* value - 绑定的监听队列是什么
* exchange - 队列对应的交换器是什么
* key - 队列的路由键是什么
*
* @Queue : 描述一个队列
* 属性 -
* value/name - 队列名称
* autoDelete - 是否自动删除。默认为 "" ,如果队列名称定义,不自动删除,,队列名称不定义,队列为自动删除队列,队列名称随机生成
* 如果是自动删除,代表所有的consumer关闭后,队列自动删除
*
* @Exchange : 描述一个交换器
* 属性 -
* value/name - 交换器名称
* type - 交换器的类型,可选 direct/fanout/topic,默认direct
* autoDelete - 是否自动删除,默认为"false",不自动删除
*/
@RabbitListener(bindings = {
@QueueBinding(
value = @Queue(value = "log-info-queue",autoDelete = "false"),
exchange = @Exchange(value = "log-ex-direct",type = "direct",autoDelete = "false"),
key = "direct-rk-info"
)
})
@Component
public class InfoLogConsumer {
/**
* 消息消费方法。 当队列 log-info-queue中出现消息立刻消费
* @param msg 消息内容
*
* @RabbitHandler - 配合类型上的RabbitListener注解,标记当前的方法,是一个监听消息队列,消费消息的方法
* 如果将 @RabbitListener 注解写到方法上可以不用写 @RabbitHandler 注解
*/
@RabbitHandler
public void onMessage(String msg) {
System.out.println("InfoLogConsumer 消费消息: " + msg);
}
}
https://blog.youkuaiyun.com/dark868/article/details/105171660
启动类
package com.bjsxt;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class RabbitConsumerApp {
public static void main(String[] args) {
SpringApplication.run(RabbitConsumerApp.class, args);
}
}
配置文件
application.yml
spring:
rabbitmq:
host: 192.168.88.101 # RabbitMQ 服务的地址,默认Localhost
port: 5672 #RabbitMQ 的端口默认 5672
username: admin # 用户名
password: admin # 访问RabbitMQ的密码
virtual-host: / # 访问RabbitMQ的哪一个虚拟主机,默认为 /
添加注解,启动项目
54654 是客户端连接端口
D : 长期持久化,即使Consumer关闭了,这个交换器还存在
D : 队列创建之后长期保存,不会删除 如果是 AD (AUTO——DELETE)当consumer全部关闭时自动删除
新建一个类 日志消费者
package com.bjsxt.rabbit.consumer;
import org.springframework.amqp.rabbit.annotation.Exchange;
import org.springframework.amqp.rabbit.annotation.Queue;
import org.springframework.amqp.rabbit.annotation.QueueBinding;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;
/**
* 日志消息消费者,只消费error和warn日志
* error 日志消息存储在队列 log-error-queue
* warn 日志消息存储在队列 log-warn-queue
* * 使用的交换器名称是 log-ex-direct
* * 交换器类型是 direct
* error 队列的路由键是 direct-rk-error
* warn 队列的路由键是 direct-rk-warn
*/
@Component //让spring容器做加载
public class LogConsumers {
@RabbitListener(bindings = {
@QueueBinding(
value = @Queue(value = "log-error-queue"),
exchange = @Exchange(value = "log-ex-direct"),
key = "direct-rk-error"
)
})
public void onLogErrorMessage(String msg) {
System.out.println("错误日志信息:" + msg);
}
@RabbitListener(bindings = {
@QueueBinding(
value = @Queue(value = "log-warn-queue",autoDelete = "false"),
exchange = @Exchange(value = "log-ex-direct"),
key = "direct-rk-warn"
)
})
public void onLogWarnMessage(String msg) {
System.out.println("警告日志信息:" + msg);
}
}
重启项目
新建一个子模块 Publisher
package com.bjsxt.rabbit.sender;
import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
/**
* 发送消息的类型
* 把消息发送到RabbitMQ中
* 在spring-boot-starter-amqp中,启动器自动创建初始化一个AMQPTemplate,
* 作为访问AMQP消息服务器(MQ消息中间件)的客户端对象
*/
@Component //注册到Spring IOC容器中
public class LogMessageSender {
@Autowired
private AmqpTemplate amqpTemplate;
/**
* 发送消息的方法
* amqpTemplate.convertAndSend(String exchange,String routingKey,Object message)
* exchange - 交换器名称
* routingKey - 路由键
* message - 要发送的消息内容,就是传递的消息对象的消息体。
*/
public void sendMessage(String exchange,String routingKey,String message) {
this.amqpTemplate.convertAndSend(exchange, routingKey, message);
}
}
package com.bjsxt;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class RabbitPublisherApp {
public static void main(String[] args) {
SpringApplication.run(RabbitPublisherApp.class, args);
}
}
配置文件:
application.yml
spring:
rabbitmq:
host: 192.168.88.101
port: 5672
username: admin
password: admin
package com.bjsxt.test;
import com.bjsxt.RabbitConsumerApp;
import com.bjsxt.rabbit.sender.LogMessageSender;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.Random;
/**
* 消息发送者测试类型
*/
@SpringBootTest(classes = {RabbitPublisherApp.class})
@RunWith(SpringRunner.class)
public class TestPublisher {
@Autowired
private LogMessageSender sender;
private String exchange = "log-ex-direct";
private String rkInfo = "direct-rk-info";
private String rkError = "direct-rk-error";
private String rkWarn = "direct-rk-warn";
@Test
public void testSend() {
Random r = new Random();
//发送十条消息
for (int i = 0; i < 10; i++) {
// rInt%3 - 0:投递消息到 info 1:投递消息到 error 2: 投递消息到 warn
int rInt = r.nextInt(100);
if (rInt % 3 == 0) {
this.sender.sendMessage(exchange, rkInfo, "发送Info日志消息 - index = " + i + "; rInt = " + rInt);
} else if (rInt % 3 == 1) {
this.sender.sendMessage(exchange, rkError, "发送Error日志消息 - index = " + i + "; rInt = " + rInt);
} else if (rInt % 3 == 2) {
this.sender.sendMessage(exchange, rkWarn, "发送Warn日志消息 - index = " + i + "; rInt = " + rInt);
}
}
}
}
启动测试类之前得保证Consumer是启动的
创建Consumer集群,复制启动类都启动,自动搭建Consumer集群
队列里有两个Consumer了
两个connection
每个Connection对应3个消息队列
发送十条消息,两个消费者轮询处理
@Test
public void testSend2Consumers() {
for (int i = 0; i < 10; i++) {
this.sender.sendMessage(exchange, rkInfo, "Info消息" + i);
this.sender.sendMessage(exchange, rkError, "Error消息" + i);
this.sender.sendMessage(exchange, rkWarn, "Warn消息" + i);
}
}
2 fanout 交换器
扇形交换器,实际上做的事情就是广播,fanout 会把消息发送给所有的绑定在当前交换器上的队列。 对应 Consumer 依然采用公平调度方式。
(代码演示)一个交换器需要绑定多个队列
需要使用注解/API:
FanoutExchange:fanout 交换器
Binding:绑定交换器和队列
BindingBuilder:Binding 的构建器
amq.fanout:内置 fanout 交换器名称
新建一个模块
package com.bjsxt.entity;
import java.io.Serializable;
import java.util.Objects;
//实体类型
public class User implements Serializable {
// 定义一个序列化唯一ID
public static final long serialVersionUID = 1L;
private Long id;
private String name;
private int age;
public User() {
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", name='" + name + '\'' +
", age=" + age +
'}';
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
User user = (User) o;
return age == user.age &&
Objects.equals(id, user.id) &&
Objects.equals(name, user.name);
}
@Override
public int hashCode() {
return Objects.hash(id, name, age);
}
}
导入依赖
package com.bjsxt.rabbit.fanout;
import com.bjsxt.entity.User;
import org.springframework.amqp.rabbit.annotation.Exchange;
import org.springframework.amqp.rabbit.annotation.Queue;
import org.springframework.amqp.rabbit.annotation.QueueBinding;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;
/**
* 广播交换器,消费者。 不需要路由键
*/
@Component
public class FanoutConsumer {
/**
* 消费消息的方法
* @param user
*
* autoDelete = "false" 为默认值可以不写
*/
@RabbitListener(bindings = {
@QueueBinding(
value = @Queue(value = "queue-user-1",autoDelete = "false"),
exchange = @Exchange(value = "ex-fanout",type = "fanout",autoDelete = "false")
)
})
public void onMessage1(User user) {
System.out.println("onMessage1 run :" + user);
}
@RabbitListener(bindings = {
@QueueBinding(
value = @Queue(value = "queue-user-2",autoDelete = "false"),
exchange = @Exchange(value = "ex-fanout",type = "fanout")
)
})
public void onMessage2(User user) {
System.out.println("onMessage2 run :" + user);
}
}
启动
3个direct 2个fanout
导入依赖
创建消息发送者
package com.bjsxt.rabbit.fanout.sender;
import com.bjsxt.entity.User;
import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
/**
* 发送消息类型。消息发送到fanout交换器中
* 交换器名称是: ex-fanout
*/
@Component
public class UserMessageSender {
@Autowired
private AmqpTemplate amqpTemplate;
/**
* 发送消息
* @param user
* exchange 接收到消息之后会消息投递到所有绑定好的队列,所以不需要路由键
*/
public void sender(User user) {
this.amqpTemplate.convertAndSend("ex-fanout","",user);
}
}
package com.bjsxt.test;
import com.bjsxt.RabbitPublisherApp;
import com.bjsxt.entity.User;
import com.bjsxt.rabbit.fanout.sender.UserMessageSender;
import com.bjsxt.rabbit.sender.LogMessageSender;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.Random;
/**
* 消息发送者测试类型
*/
@SpringBootTest(classes = {RabbitPublisherApp.class})
@RunWith(SpringRunner.class)
public class TestPublisher {
@Autowired
private LogMessageSender sender;
@Autowired
private UserMessageSender userMessageSender;
private String exchange = "log-ex-direct";
private String rkInfo = "direct-rk-info";
private String rkError = "direct-rk-error";
private String rkWarn = "direct-rk-warn";
@Test
public void testSendUserMessage2Fanout() {
for (int i = 0; i < 3; i++) {
User user = new User();
user.setId((long) i);
user.setName("姓名 - " + i);
user.setAge(20 + i);
this.userMessageSender.sender(user);
}
}
@Test
public void testSend2Consumers() {
for (int i = 0; i < 10; i++) {
this.sender.sendMessage(exchange, rkInfo, "Info消息" + i);
this.sender.sendMessage(exchange, rkError, "Error消息" + i);
this.sender.sendMessage(exchange, rkWarn, "Warn消息" + i);
}
}
@Test
public void testSend() {
Random r = new Random();
//发送十条消息
for (int i = 0; i < 10; i++) {
// rInt%3 - 0:投递消息到 info 1:投递消息到 error 2: 投递消息到 warn
int rInt = r.nextInt(100);
if (rInt % 3 == 0) {
this.sender.sendMessage(exchange, rkInfo, "发送Info日志消息 - index = " + i + "; rInt = " + rInt);
} else if (rInt % 3 == 1) {
this.sender.sendMessage(exchange, rkError, "发送Error日志消息 - index = " + i + "; rInt = " + rInt);
} else if (rInt % 3 == 2) {
this.sender.sendMessage(exchange, rkWarn, "发送Warn日志消息 - index = " + i + "; rInt = " + rInt);
}
}
}
}
选中测试 testSendUserMessage2Fanout() 方法
队列是先进先出,两个消费者都是按照 0,1,2的顺序消费消息的,交叉在一起是因为System.out输出语句有缓存
3 topic 交换器
编写消费者
package com.bjsxt.rabbit.topic;
import org.springframework.amqp.rabbit.annotation.Exchange;
import org.springframework.amqp.rabbit.annotation.Queue;
import org.springframework.amqp.rabbit.annotation.QueueBinding;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
/**
* 主题消息消费者
*/
@Component //被spring容器加载
public class TopicConsumers {
/**
* 短信消息消费者,对应的routingKey 是 user.rk.sms | order.rk.sms | pay.rk.sms | reg.rk.sms等.
* 分别代表,用户登录短信|订单下订成功通知短信 | 支付成功通知短信 | 注册码通知短信 等。
*/
@RabbitListener(bindings = {
@QueueBinding(
value = @Queue(value = "queue-sms-topic",autoDelete = "false"),
exchange = @Exchange(value = "ex-topic",type = "topic"),
key = "*.rk.sms"
)
})
public void onSMSMessage(String message) {
System.out.println("用户短信内容消息是:" + message);
}
/**
* 路由键包括:user.rk.email | reg.rk.email | reg.rk.email 等
* @param message
*/
@RabbitListener(bindings = {
@QueueBinding(
value = @Queue(value = "queue-email-topic",autoDelete = "false"),
exchange = @Exchange(value = "ex-topic",type = "topic"),
key = "*.rk.email"
)
})
public void onEmailMessage(String message) {
System.out.println("用户邮件内容消息是:" + message);
}
/**
* 所有的和rk 相关的消息,统一处理消费
* 包括的路由键有: user.rk.sms | user.rk.email | reg.rk.sms | reg.rk.email 等
* 不发短信,不发邮件,作为一个日志记录存在
* @param message
*/
@RabbitListener(bindings = {
@QueueBinding(
value = @Queue(value = "queue-all-topic",autoDelete = "false"),
exchange = @Exchange(value = "ex-topic",type = "topic"),
key = "*.rk.*"
)
})
public void onServiceMessage(String message) {
System.out.println("执行的消息处理逻辑是:" + message);
}
}
启动测试
编写Publisher
package com.bjsxt.rabbit.topicsender;
import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
/**
* 发送消息到主题交换器
*/
@Component //让spring容器去加载
public class TopicMessageSender {
@Autowired
private AmqpTemplate amqpTemplate;
/**
* 发送消息的方法
* @param exchange
* @param routingKey
* @param message
*/
public void send(String exchange, String routingKey, String message) {
this.amqpTemplate.convertAndSend(exchange, routingKey, message);
}
}
package com.bjsxt.test;
import com.bjsxt.RabbitPublisherApp;
import com.bjsxt.entity.User;
import com.bjsxt.rabbit.fanout.sender.UserMessageSender;
import com.bjsxt.rabbit.sender.LogMessageSender;
import com.bjsxt.rabbit.topicsender.TopicMessageSender;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.Random;
/**
* 消息发送者测试类型
*/
@SpringBootTest(classes = {RabbitPublisherApp.class})
@RunWith(SpringRunner.class)
public class TestPublisher {
@Autowired
private LogMessageSender sender;
@Autowired
private UserMessageSender userMessageSender;
@Autowired
private TopicMessageSender topicMessageSender;
private String exchange = "log-ex-direct";
private String rkInfo = "direct-rk-info";
private String rkError = "direct-rk-error";
private String rkWarn = "direct-rk-warn";
@Test
public void sendMessage2Topic() {
//随机数 %6
//0 rk - user.rk.sms *.rk.* *.rk.sms
//1 rk - user.rk.email *.rk.* *.rk.email
//2 rk - order.rk.sms *.rk.* *.rk.sms
//3 rk - order.rk.email *.rk.* *.rk.email
//4 rk - reg.rk.sms *.rk.* *.rk.sms
//5rk - reg.rk.qq *.rk.*
Random r = new Random();
for (int i = 0; i < 10; i++) {
int rInt = r.nextInt(100);
if (rInt % 6 == 0) {
this.topicMessageSender.send("ex-topic",
"user.rk.sms",
"用户登录验证码是:123456 - 发送短信");
} else if (rInt % 6 == 1) {
this.topicMessageSender.send("ex-topic",
"user.rk.email",
"用户登录验证码是:123456 - 发送到邮箱");
} else if (rInt % 6 == 2) {
this.topicMessageSender.send("ex-topic",
"order.rk.sms",
"订单下订成功 - 发送短信");
}else if (rInt % 6 == 3) {
this.topicMessageSender.send("ex-topic",
"order.rk.email",
"订单下订成功 - 发送到邮箱");
}else if (rInt % 6 == 4) {
this.topicMessageSender.send("ex-topic",
"reg.rk.sms",
"注册验证码是:654321 - 发送短信");
}else if (rInt % 6 == 5) {
this.topicMessageSender.send("ex-topic",
"reg.rk.qq",
"注册验证码是:654321 - 发送QQ");
}
}
}
@Test
public void testSendUserMessage2Fanout() {
for (int i = 0; i < 3; i++) {
User user = new User();
user.setId((long) i);
user.setName("姓名 - " + i);
user.setAge(20 + i);
this.userMessageSender.sender(user);
}
}
@Test
public void testSend2Consumers() {
for (int i = 0; i < 10; i++) {
this.sender.sendMessage(exchange, rkInfo, "Info消息" + i);
this.sender.sendMessage(exchange, rkError, "Error消息" + i);
this.sender.sendMessage(exchange, rkWarn, "Warn消息" + i);
}
}
@Test
public void testSend() {
Random r = new Random();
//发送十条消息
for (int i = 0; i < 10; i++) {
// rInt%3 - 0:投递消息到 info 1:投递消息到 error 2: 投递消息到 warn
int rInt = r.nextInt(100);
if (rInt % 3 == 0) {
this.sender.sendMessage(exchange, rkInfo, "发送Info日志消息 - index = " + i + "; rInt = " + rInt);
} else if (rInt % 3 == 1) {
this.sender.sendMessage(exchange, rkError, "发送Error日志消息 - index = " + i + "; rInt = " + rInt);
} else if (rInt % 3 == 2) {
this.sender.sendMessage(exchange, rkWarn, "发送Warn日志消息 - index = " + i + "; rInt = " + rInt);
}
}
}
}