SpringCloud Stream 使用

第一步:

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

第二步 定义接口:

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package com.example.order.message;   import org.springframework.cloud.stream.annotation.Input; import org.springframework.cloud.stream.annotation.Output; import org.springframework.messaging.MessageChannel; import org.springframework.messaging.SubscribableChannel;   /**  * @Title: StreamClient  * @ProjectName order  * @date 2019/11/2015:06  */ public interface StreamClient {     String INPUT = "input";     String OUTPUT = "output";       String INPUT2 = "input2";     String OUTPUT2 = "output2";       @Input(StreamClient.INPUT)     SubscribableChannel input();       @Output(StreamClient.OUTPUT)     MessageChannel output();       @Input(StreamClient.INPUT2)     SubscribableChannel input2();       @Output(StreamClient.OUTPUT2)     MessageChannel output2(); }

　　

第三步 定义接受方:

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package com.example.order.message;   import com.example.order.dto.OrderDTO; import lombok.extern.slf4j.Slf4j; import org.springframework.cloud.stream.annotation.EnableBinding; import org.springframework.cloud.stream.annotation.StreamListener; import org.springframework.messaging.handler.annotation.SendTo; import org.springframework.stereotype.Component;   /**  * 消息接收类  * @Title: StreamReceiver  * @ProjectName order  * @date 2019/11/2015:09  */ @Component @EnableBinding(StreamClient.class)  // 定义的接口类 @Slf4j public class StreamReceiver {     // 接收字符串     /*@StreamListener(value = StreamClient.INPUT)     public void process(Object message) {         log.info("StreamReceiver: {}", message);     }*/      /**      * 接收对象, 接收成功后在回应一下      * @param message      */     @StreamListener(value = StreamClient.INPUT)     @SendTo(value = StreamClient.INPUT2)     public String process(OrderDTO message) {         log.info("StreamReceiver: {}", message);         return "ok";     }       // 回应接收     @StreamListener(value = StreamClient.INPUT2)     public void process2(String message) {         log.info("INPUT2, {}", message);     }   }

 

第四步 定义发送方:

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package com.example.order.controller;   import com.example.order.dto.OrderDTO; import com.example.order.message.StreamClient; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.messaging.support.MessageBuilder; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController;   import java.util.Date;   /**  * @Title: SendMessageController  * @ProjectName order  * @date 2019/11/2015:11  */ @RestController public class SendMessageController {       @Autowired     private StreamClient streamClient;       // 发送字符串     /*@GetMapping("/sendMessage")     public void sendMessage() {         streamClient.output().send(MessageBuilder.withPayload("now " + new Date()).build());     }*/       /**      * 发送对象      */     @GetMapping("/sendMessage")     public void sendMessage() {         OrderDTO orderDTO = new OrderDTO();         orderDTO.setOrderId("123123123");         streamClient.output().send(MessageBuilder.withPayload(orderDTO).build());     }   }

第五步 配置yml文件

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spring:   application:     name: ORDER   cloud:     config:       discovery:         enabled: true         service-id: CONFIG       profile: dev     stream:       bindings:         input:           destination: mymessage # 指定mq           group: order  # 所属组         output:           destination: mymessage           group: order  # 所属组           content-type: application/json  # 内容类型为json           input2:           destination: mymessage2 # 指定mq           group: order  # 所属组         output2:           destination: mymessage2           group: order  # 所属组           content-type: application/json  # 内容类型为json eureka:    client:      service-url:        defaultZone: http://10.10.10.103:8761/eureka/