spring cloud stream @EnableBinding 过期新版本简单demo

原创已于 2022-06-12 13:37:27 修改 · 2k 阅读

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#java #spring cloud

于 2022-06-12 13:30:58 首次发布

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该博客介绍了如何在Spring Boot应用中使用Spring Cloud Stream和RabbitMQ搭建消息生产者和消费者。首先，展示了项目的依赖配置，包括Spring Cloud和Spring Cloud Alibaba的版本。接着，提供了生产者组件的代码，通过StreamBridge发送消息到'demoChannel-out-0'通道。然后，给出了消费者的代码，定义了一个Consumer来接收'demoChannel-in-0'通道的消息。最后，列出了yaml配置，包括RabbitMQ的连接信息和通道配置。项目启动后，可以观察到消息的发送与接收。

本例子采用自己发送自己消费就没有弄多个项目了。

MQ使用的是rabbitMQ：可以用docker安装

官网文档地址：

spring cloud streamhttps://docs.spring.io/spring-cloud-stream/docs/current/reference/html/spring-cloud-stream.html#_batch_consumers

本文档代码：springcloudstreamrabbitmq资源-Java文档类资源-优快云下载

1.pom文件项目引入项目依赖

这边展示全部的项目依赖好展示相关的版本

  <properties>
        <java.version>1.8</java.version>
        <spring.cloud.version>2021.0.3</spring.cloud.version>
        <spring.cloud.alibaba.version>2021.1</spring.cloud.alibaba.version>
    </properties>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring.cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring.cloud.alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-stream</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-stream-rabbit</artifactId>
        </dependency>
    </dependencies>

2。生产者代码

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.stream.function.StreamBridge;
import org.springframework.messaging.support.MessageBuilder;
import org.springframework.stereotype.Component;

/**
 * @author weida.chen@joymo.tech
 * @since 2022/6/11
 */
@Component
public class Producter {
    

    @Autowired
    private StreamBridge streamBridge;

    public String sendMessage(String meaasge){
        streamBridge.send("demoChannel-out-0",
                    MessageBuilder.withPayload(meaasge).build());
        return null;
    }
}

3.消费者代码


import java.util.function.Consumer;

/**
 * @author weida.chen@joymo.tech
 * @since 2022/6/11
 */
@Service
@Slf4j
public class Listener {
    /**
     * demoChannel 是管道的名字
     * @return
     */
    @Bean
    public Consumer<String> demoChannel() {
        return message -> {
            log.info("接收消息为：{}", message);
        };
    }
}

4.yaml配置

spring:
  application:
    name: demo
  rabbitmq:
    host: 192.168.116.200
    port: 32688
    username: admin
    password: 123456
  cloud:
    stream:
      bindings:
        ## 新版本固定格式  channel名字-{out/in}-{index}  
        demoChannel-out-0:
          destination: demoExchange
          contentType: application/json
        demoChannel-in-0:
          destination: demoExchange
          contentType: application/json
server:
  port: 8081

management:
  endpoints:
    web:
      exposure:
        include: "*"

这边贴上官网的解释：