安装环境 erlang
队列 RabbitMQ
启动RabbitMQ，然后添加一个用户， 并给用户设置权限
庞凯博# 后台启动
rabbitmq-server -detached
# 添加用户
rabbitmqctl add_user root 123456
# 设置用户权限：
rabbitmqctl set_permissions -p "/" root ".*" ".*" ".*"
接下来创建一个springboot工程，并集成RabbitMQ。
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.2.8.RELEASEversion>
<relativePath/>
parent>
<groupId>com.lagougroupId>
<artifactId>rabbitmq-workartifactId>
<version>0.0.1-SNAPSHOTversion>
<name>rabbitmq-workname>
<description>Demo project for Spring Bootdescription>
<properties>
<java.version>1.8java.version>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-amqpartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-data-redisartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>5.1.47version>
<scope>runtimescope>
dependency>
<dependency>
<groupId>com.baomidougroupId>
<artifactId>mybatis-plus-boot-starterartifactId>
<version>3.3.2version>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
plugin>
plugins>
build>
project>
接下来在application.yml配置文件中假如rabbitmq配置
spring:
application:
name: rabbit-work
# rabbitmq配置
rabbitmq:
host: localhost
virtual-host: /
username: root
password: 123456
# redis配置
redis:
timeout: 6000
host: localhost
port: 6379
database: 0
# 数据源配置
datasource:
url: jdbc:mysql://localhost:3306/order?useunicode=true&characterEncoding=utf8&useSSL=false
driver-class-name: com.mysql.jdbc.Driver
username: root
password: 123456
hikari:
minimum-idle: 3
maximum-pool-size: 5
max-lifetime: 30000
connection-init-sql: SELECT 1
# mybatis-plus配置
mybatis-plus:
mapper-locations: classpath:com.lagou.*.mapper/*.xml
type-aliases-package: com.lagou.*.domain
定义RabbitConfig
@Configuration
public class RabbitConfig {
/**
* 订单队列
*
* @return {@link Queue}
*/
@Bean
public Queue orderQueue() {
Map argments = new HashMap<>();
argments.put("x-message-ttl", 60000);
argments.put("x-dead-letter-exchange", RabbitConstants.ORDER_DLX_EXCHANGE);
argments.put("x-dead-letter-routing-key", RabbitConstants.ORDER_DLX_ROUTING_KEY);
Queue queue = new Queue(RabbitConstants.ORDER_QUEUE, true, false, false, argments);
return queue;
}
/**
* 订单交换机
*
* @return {@link Exchange}
*/
@Bean
public Exchange orderExchange() {
return new DirectExchange(RabbitConstants.ORDER_EXCHANGE, true, false, null);
}
/**
* 订单路由键
*
* @return {@link Binding}
*/
@Bean
public Binding orderRouting() {
return BindingBuilder.bind(orderQueue()).to(orderExchange()).with(RabbitConstants.ORDER_ROUTING_KEY).noargs();
}
/**
* 订单死信队列
*
* @return {@link Queue}
*/
@Bean
public Queue orderDlxQueue() {
Queue queue = new Queue(RabbitConstants.ORDER_DLX_QUEUE, true, false, false);
return queue;
}
/**
* 订单死信交换机
*
* @return {@link Exchange}
*/
@Bean
public Exchange orderDlxExchange() {
return new DirectExchange(RabbitConstants.ORDER_DLX_EXCHANGE, true, false, null);
}
/**
* 订单死信路由键
*
* @return {@link Binding}
*/
@Bean
public Binding orderDlxRouting() {
return BindingBuilder.bind(orderDlxQueue()).to(orderDlxExchange()).with(RabbitConstants.ORDER_DLX_ROUTING_KEY).noargs();
}
/**
* 库存队列
*
* @return {@link Queue}
*/
@Bean
public Queue stockQueue() {
return new Queue(RabbitConstants.STOCK_QUEUE, true, false, false, null);
}
/**
* 库存交换机
*
* @return {@link Exchange}
*/
@Bean
public Exchange stockExchange() {
return new DirectExchange(RabbitConstants.STOCK_EXCHANGE, true, false, null);
}
/**
* 库存路由键
*
* @return {@link Binding}
*/
@Bean
public Binding stockRouting() {
return BindingBuilder.bind(stockQueue()).to(stockExchange()).with(RabbitConstants.STOCK_ROUTING_KEY).noargs();
}
}
实现消息发送
@RequestMapping(value = "/submit", produces = "application/json;charset=UTF-8")
public R submit(@RequestBody OrderVo orderVo) throws UnsupportedEncodingException {
Order order = orderService.createOrder(orderVo);
System.out.println("OrderController.submit... createOrder");
// 放入死信队列
amqpTemplate.convertAndSend(RabbitConstants.ORDER_EXCHANGE,
RabbitConstants.ORDER_ROUTING_KEY,
(order.getId() + ""));
System.out.println("OrderController.submit... sendMessage to orderExchange");
return R.ok(order);
}
消息消费者监听
@Component
public class OrderHandler {
@Autowired
private OrderService orderService;
@RabbitListener(queues = RabbitConstants.ORDER_DLX_QUEUE, ackMode = "MANUAL")
public void onMessage(Message message, Channel channel) throws IOException {
System.out.println("消息进入死信队列...");
String s = new String(message.getBody());
Order o = orderService.getById(Long.parseLong(s));
if (o != null && OrderConstants.TOPAID.getCode().equals(o.getOrderState())) {
Order order = new Order();
order.setId(o.getId());
order.setOrderState(OrderConstants.CANCEL.getCode());
order.setGmtModified(new Date());
orderService.updateById(order);
}
// 手动ack
channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
}
}
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