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SpringBoot中使用RocketMQ的示例代码

作者:陈家宝

本文主要介绍SpringBoot中使用RocketMQ的示例代码,文中通过示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下

接下来我们模拟一种场景:商品下单成功之后,向下单用户发送短信。以此来示例SpringBoot中RocketMQ的使用方式。

1 订单微服务发送消息

1.1 订单微服务添加rocketmq的依赖

        <!--rocketmq-->
        <dependency>
            <groupId>org.apache.rocketmq</groupId>
            <artifactId>rocketmq-spring-boot-starter</artifactId>
            <version>2.1.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.rocketmq</groupId>
            <artifactId>rocketmq-client</artifactId>
            <version>4.7.1</version>
        </dependency>

1.2 添加配置

rocketmq:
  name-server: 192.168.232.129:9876 # rocketmq服务的地址
  producer:
    group: jack-producer-group  # 生产者组名

1.3 编写测试代码

package cn.jack.controller;
 
import cn.jack.domain.Order;
import cn.jack.domain.Product;
import cn.jack.service.OrderService;
import cn.jack.service.ProductService;
import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.apache.rocketmq.spring.core.RocketMQTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
 
@RestController
@Slf4j
public class OrderController {
 
    @Autowired
    private RestTemplate restTemplate;
    @Autowired
    private OrderService orderService;
    @Autowired
    private DiscoveryClient discoveryClient;
    @Autowired
    private ProductService productService;
    @Autowired
    private RocketMQTemplate rocketMQTemplate;
 
    /**
     * 下单 -- 基于Feign实现服务调用
     * @param pid   商品id
     * @return
     */
    @RequestMapping("/order/prod/{pid}")
    public Order order(@PathVariable("pid") Long pid) {
        log.info("收到下单请求,准备查询商品信息。pid={}", pid);
 
        // 通过Feign调用商品微服务,查询商品信息
        Product product = this.productService.findByPid(pid);
        log.info("商品信息查询成功。内容为:{}", JSON.toJSONString(product));
 
        // 进行容错判断
        if (product.getPid() == -100) {
            Order order = new Order();
            order.setOid(-100L);
            order.setPname("下单失败");
            return order;
        }
 
        // 生成商品信息保存
        Order order = new Order();
        order.setNumber(1);
        order.setPid(pid);
        order.setPname(product.getPname());
        order.setPprice(product.getPprice());
        order.setUid(1);
        order.setUsername("陈家宝");
 
        this.orderService.createOrder(order);
        log.info("订单信息保存成功。内容为:{}", JSON.toJSONString(order));
 
        // TODO 下单成功之后,mq发送订单内容消息
        rocketMQTemplate.convertAndSend("jack-topic", order);
 
        return order;
    }
}

1.4 测试

访问下单接口,确认RocketMQ是否发送了消息。从RocketMQ控制台得到确认,消息发送成功。

2 用户微服务订阅消息

2.1 用户微服务增加rocketmq依赖

        <!--nacos客户端-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
 
        <!--rocketmq-->
        <dependency>
            <groupId>org.apache.rocketmq</groupId>
            <artifactId>rocketmq-spring-boot-starter</artifactId>
            <version>2.1.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.rocketmq</groupId>
            <artifactId>rocketmq-client</artifactId>
            <version>4.7.1</version>
        </dependency>

2.2 修改主类,启动nacos客户端

package cn.jack;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
 
@SpringBootApplication
@EnableDiscoveryClient
public class UserApplication {
    public static void main(String[] args) {
        SpringApplication.run(UserApplication.class);
    }
}

2.3 修改配置文件

rocketmq:
  name-server: 192.168.232.129:9876 # rocketmq服务的地址

2.4 编写消息接收服务

package cn.jack.service;
 
import cn.jack.domain.Order;
import lombok.extern.slf4j.Slf4j;
import org.apache.rocketmq.spring.annotation.RocketMQMessageListener;
import org.apache.rocketmq.spring.core.RocketMQListener;
import org.springframework.stereotype.Service;
 
@Slf4j
@Service
@RocketMQMessageListener(consumerGroup = "jack-consumer-group", topic = "jack-topic")
public class SmsService implements RocketMQListener<Order> {
    @Override
    public void onMessage(Order order) {
        log.info("收到订单信息,内容如下:{}, 接下来进行短信发送", order);
    }
}

2.5 测试

启动用户微服务,收到了来自RocketMQ的消息。

2020-09-16 21:46:30.465 INFO [service-user,,,] 660 --- [MessageThread_2] cn.jack.service.SmsService : 收到订单信息,内容如下:Order(oid=66, uid=1, username=陈家宝, pid=2, pname=雪梨, pprice=2000.0, number=1), 接下来进行短信发送
2020-09-16 21:46:30.465 INFO [service-user,,,] 660 --- [MessageThread_1] cn.jack.service.SmsService : 收到订单信息,内容如下:Order(oid=65, uid=1, username=陈家宝, pid=3, pname=华为, pprice=8000.0, number=1), 接下来进行短信发送

消息成功消费:

到此这篇关于SpringBoot中使用RocketMQ的示例代码的文章就介绍到这了,更多相关SpringBoot使用RocketMQ内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

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