springcloud整合stream解决项目升级的多个消息中间件的收发问题

cloud stream

（一）简介
Spring Cloud Stream 是一个用来为微服务应用构建消息驱动能力的框架。它可以基于 Spring Boot 来创建独立的、可用于生产的 Spring 应用程序。Spring Cloud Stream 为一些供应商的消息中间件产品提供了个性化的自动化配置实现，并引入了发布-订阅、消费组、分区这三个核心概念。通过使用 Spring Cloud Stream，可以有效简化开发人员对消息中间件的使用复杂度，让系统开发人员可以有更多的精力关注于核心业务逻辑的处理。但是目前 Spring Cloud Stream 只支持 RabbitMQ 和 Kafka 的自动化配置。

（二）快速搭建
首先，我们通过一个简单的示例对 Spring Cloud Stream 有一个初步的认识。我们中间件使用 RabbitMQ，创建 spring-cloud-stream 模块

消息的发送者：springboot工程

POM

<dependencies>
    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
    <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>

    <!-- https://mvnrepository.com/artifact/com.rabbitmq/amqp-client -->
    <dependency>
        <groupId>com.rabbitmq</groupId>
        <artifactId>amqp-client</artifactId>
        <version>5.7.3</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-amqp</artifactId>
    </dependency>

    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-core</artifactId>
    </dependency>

    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
    </dependency>

    <!--spring boot热部署插件-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <optional>true</optional>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-stream-rabbit -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-stream-rabbit</artifactId>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-actuator -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    </dependency>
</dependencies>

application.yml文件：

server:
  port: 8801

spring:
  application:
    name: stream-output
  cloud:
    stream:
      bindings:
        output_channel: #通道
          destination: exchange-stream #交换机名称
          group: queue1 #队列名称
          binder: rabbit_cluster # 连接对象
      binders:
        rabbit_cluster:
          type: rabbit
          environment:
            spring:
              rabbitmq:
                host: 127.0.0.1
                port: 5672
                username: guest
                password: guest

eureka:
  client:
    serviceUrl: #注册中心的注册地址
      defaultZone: http://eureka-server1:8761/eureka/
  instance:
    prefer-ip-address: true  #在eureka上显示IP地址
    instance-id: stream-output #在eureka上显示的名称

启动入口：

@SpringBootApplication
@EnableEurekaClient
public class CloudStream8801Application {
    public static void main(String[] args) {

        SpringApplication.run(CloudStream8801Application.class,args);
    }

创建一个通道：

public interface IMessageProvide {

    String OUTPUT_CHANNEL = "output_channel";

    //注解@Output表明了它是一个输出类型的通道类，名字output_channel。这一名字与app1中通道名一致，表明注入了
    //一个名字为output_channel的通道
    @Output(IMessageProvide.OUTPUT_CHANNEL)
    MessageChannel logoutput();
}

定义发送消息的方法：

@Service
@EnableBinding(IMessageProvide.class)
public class RabbitmqSender {
    @Autowired
    private IMessageProvide messageProvide;

    // 发送消息的方法
    public String sendMessage(Object message, Map<String,Object> properties){

        MessageHeaders headers = new MessageHeaders(properties);
        Message<Object> objectMessage = MessageBuilder.createMessage(message, headers);
        boolean send = messageProvide.logoutput().send(objectMessage);
        if (send)
            return "完成。。";
        return "00000";
    }
}

测试发送消息的controller

@RequestMapping("/stream")
@RestController
public class StreamController {

    @Autowired
    private RabbitmqSender rabbitmqSender;

    @RequestMapping("/sane")
    public String saneMessage(){
        String uuid = UUID.randomUUID().toString();
        Map<String, Object> map = new HashMap<>();
        map.put("aa","11");
        map.put("bb","22");
        map.put("cc","33");

        String s = rabbitmqSender.sendMessage(uuid, map);
        return s;
    }
}

消息消费的工程：
POM：

<dependencies>
    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
    <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>

    <!-- https://mvnrepository.com/artifact/com.rabbitmq/amqp-client -->
    <dependency>
        <groupId>com.rabbitmq</groupId>
        <artifactId>amqp-client</artifactId>
        <version>5.7.3</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-amqp</artifactId>
    </dependency>

    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-core</artifactId>
    </dependency>

    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
    </dependency>

    <!--spring boot热部署插件-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <optional>true</optional>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-stream-rabbit -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-stream-rabbit</artifactId>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-actuator -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    </dependency>
</dependencies>
和发送消息的工程没差别
application.yml

server:
  port: 8802

spring:
  application:
    name: cloud-input
  cloud:
    stream:
      binders:
        rabbit_cluster:
          type: rabbit
          environment:
            spring:
              rabbitmq:
                host: 127.0.0.1
                port: 5672
                username: guest
                password: guest
      bindings:
        input_channel:
          destination: exchange-stream
          group: queue1
          binder: rabbit_cluster
          consumer:
            concurrency: 1 #每次从队列中获取一个消息消费
eureka:
  client:
    serviceUrl: #注册中心的注册地址
      defaultZone: http://eureka-server1:8761/eureka/
  instance:
    prefer-ip-address: true  #在eureka上显示IP地址
    instance-id: cloud-input #在eureka上显示的名称

启动的方法：

@SpringBootApplication
@EnableEurekaClient
public class CloudStream8802Application {
    public static void main(String[] args) {

        SpringApplication.run(CloudStream8802Application.class,args);
    }
}

监听队列的service类：
监听的通道：

public interface Imessage {
    String INPUT_CHANNEL = "input_channel";

    //注解@Input声明了它是一个输入类型的通道，名字是input_channel
    @Input(Imessage.INPUT_CHANNEL)
    SubscribableChannel loginput();
}

消费消息的类：

@EnableBinding(Imessage.class) //绑定通道
public class RabbitmqReceiver {
    @Autowired
    private Imessage imessage;

    @StreamListener(Imessage.INPUT_CHANNEL)
    public void receiver(Message message) throws Exception {
        Channel channel = (Channel)message.getHeaders().get(AmqpHeaders.CHANNEL);
        Long deliveryTag = (Long)message.getHeaders().get(AmqpHeaders.DELIVERY_TAG);
        System.err.println("Input Stream 1 接受数据：" + message);
        System.err.println("消息为   ："+message.getPayload().toString());
        System.err.println("消费完毕---------------");
//        channel.basicAck(deliveryTag, false);
    }
}

最基础的stream整合就完成了，后面开发中高级的应用后面再补充