（十七）Java springcloud B2B2C o2o多使用者商城 springcloud架構-訊息驅動 Spring Cloud Stream

在使用spring cloud雲架構的時候，我們不得不使用Spring cloud Stream，因為訊息中介軟體的使用在專案中無處不在，我們公司後面做了娛樂方面的APP，在使用spring cloud做架構的時候，其中訊息的非同步通知，業務的非同步處理都需要使用訊息中介軟體機制。spring cloud的官方給出的整合建議（使用rabbit mq和kafka），我看了一下原始碼和配置，只要把rabbit mq整合，kafka只是換了一個pom配置jar包而已，閒話少說，我們就直接進入配置實施：

1. 簡介：

Spring cloud Stream 資料流操作開發包，封裝了與Redis,Rabbit、Kafka等傳送接收訊息。

2. 使用工具：

rabbit，具體的下載和安裝細節我這裡不做太多講解，網上的例項太多了

3. 建立commonservice-mq-producer訊息的傳送者專案，在pom裡面配置stream-rabbit的依賴

<span style="font-size: 16px;"><!-- 引入MQ訊息驅動的微服務包，引入stream只需要進行配置化即可，是對rabbit、kafka很好的封裝 -->  
<dependency>  
    <groupId>org.springframework.cloud</groupId>  
    <artifactId>spring-cloud-starter-stream-rabbit</artifactId>  
</dependency></span>  複製程式碼

4. 在yml檔案裡面配置rabbit mq

<span style="font-size: 16px;">server:  
  port: 5666  
spring:  
  application:  
    name: commonservice-mq-producer  
  profiles:   
    active: dev  
  cloud:  
    config:  
      discovery:   
        enabled: true  
        service-id: commonservice-config-server  
  <span style="color: #ff0000;"># rabbitmq和kafka都有相關配置的預設值，如果修改，可以再次進行配置  
    stream:  
      bindings:  
        mqScoreOutput:   
          destination: honghu_exchange  
          contentType: application/json  
            
  rabbitmq:  
     host: localhost  
     port: 5672  
     username: honghu  
     password: honghu</span>  
eureka:   
  client:  
    service-url:  
      defaultZone: http://honghu:123456@localhost:8761/eureka  
  instance:  
    prefer-ip-address: true</span>  複製程式碼

5. 定義介面ProducerService

<span style="font-size: 16px;">package com.honghu.cloud.producer;  
  
import org.springframework.cloud.stream.annotation.Output;  
import org.springframework.messaging.SubscribableChannel;  
  
public interface ProducerService {  
      
    String SCORE_OUPUT = "mqScoreOutput";  
      
    @Output(ProducerService.SCORE_OUPUT)  
    SubscribableChannel sendMessage();  
}</span>  複製程式碼

6. 定義繫結

<span style="font-size: 16px;">package com.honghu.cloud.producer;  
  
import org.springframework.cloud.stream.annotation.EnableBinding;  
  
@EnableBinding(ProducerService.class)  
public class SendServerConfig {  
  
}</span>  複製程式碼

7. 定義傳送訊息業務ProducerController

<span style="font-size: 16px;">package com.honghu.cloud.controller;  
  
  
import org.springframework.beans.factory.annotation.Autowired;  
import org.springframework.integration.support.MessageBuilder;  
import org.springframework.messaging.Message;  
import org.springframework.web.bind.annotation.PathVariable;  
import org.springframework.web.bind.annotation.RequestBody;  
import org.springframework.web.bind.annotation.RequestMapping;  
import org.springframework.web.bind.annotation.RequestMethod;  
import org.springframework.web.bind.annotation.RestController;  
  
import com.honghu.cloud.common.code.ResponseCode;  
import com.honghu.cloud.common.code.ResponseVO;  
import com.honghu.cloud.entity.User;  
import com.honghu.cloud.producer.ProducerService;  
  
import net.sf.json.JSONObject;  
  
@RestController  
@RequestMapping(value = "producer")  
public class ProducerController {  
      
    @Autowired  
    private ProducerService producerService;  
      
      
    /** 
     * 通過get方式傳送</span>物件<span style="font-size: 16px;"> 
     * @param name 路徑引數 
     * @return 成功|失敗 
     */  
    @RequestMapping(value = "/sendObj", method = RequestMethod.GET)  
    public ResponseVO sendObj() {  
        User user = new User(1, "hello User");  
        <span style="color: #ff0000;">Message<User> msg = MessageBuilder.withPayload(user).build();</span>  
        boolean result = producerService.sendMessage().send(msg);  
        if(result){  
            return ResponseCode.buildEnumResponseVO(ResponseCode.RESPONSE_CODE_SUCCESS, false);  
        }  
        return ResponseCode.buildEnumResponseVO(ResponseCode.RESPONSE_CODE_FAILURE, false);  
    }  
      
      
    /** 
     * 通過get方式傳送字串訊息 
     * @param name 路徑引數 
     * @return 成功|失敗 
     */  
    @RequestMapping(value = "/send/{name}", method = RequestMethod.GET)  
    public ResponseVO send(@PathVariable(value = "name", required = true) String name) {  
        Message msg = MessageBuilder.withPayload(name.getBytes()).build();  
        boolean result = producerService.sendMessage().send(msg);  
        if(result){  
            return ResponseCode.buildEnumResponseVO(ResponseCode.RESPONSE_CODE_SUCCESS, false);  
        }  
        return ResponseCode.buildEnumResponseVO(ResponseCode.RESPONSE_CODE_FAILURE, false);  
    }  
      
    /** 
     * 通過post方式傳送</span>json物件<span style="font-size: 16px;"> 
     * @param name 路徑引數 
     * @return 成功|失敗 
     */  
    @RequestMapping(value = "/sendJsonObj", method = RequestMethod.POST)  
    public ResponseVO sendJsonObj(@RequestBody JSONObject jsonObj) {  
        Message<JSONObject> msg = MessageBuilder.withPayload(jsonObj).build();  
        boolean result = producerService.sendMessage().send(msg);  
        if(result){  
            return ResponseCode.buildEnumResponseVO(ResponseCode.RESPONSE_CODE_SUCCESS, false);  
        }  
        return ResponseCode.buildEnumResponseVO(ResponseCode.RESPONSE_CODE_FAILURE, false);  
    }  
}  
</span>  複製程式碼

8. 建立commonservice-mq-consumer1訊息的消費者專案，在pom裡面配置stream-rabbit的依賴

<!-- 引入MQ訊息驅動的微服務包，引入stream只需要進行配置化即可，是對rabbit、kafka很好的封裝 -->  
<dependency>  
    <groupId>org.springframework.cloud</groupId>  
    <artifactId>spring-cloud-starter-stream-rabbit</artifactId>  
</dependency>  複製程式碼

9. 在yml檔案中配置：

server:  
  port: 5111  
spring:  
  application:  
    name: commonservice-mq-consumer1  
  profiles:   
    active: dev  
  cloud:  
    config:  
      discovery:   
        enabled: true  
        service-id: commonservice-config-server  
          
    <span style="color: #ff0000;">stream:  
      bindings:  
        mqScoreInput:  
          group: honghu_queue  
          destination: honghu_exchange  
          contentType: application/json  
            
  rabbitmq:  
     host: localhost  
     port: 5672  
     username: honghu  
     password: honghu</span>  
eureka:   
  client:  
    service-url:  
      defaultZone: http://honghu:123456@localhost:8761/eureka  
  instance:  
    prefer-ip-address: true  複製程式碼

10. 定義介面ConsumerService

package com.honghu.cloud.consumer;  
  
import org.springframework.cloud.stream.annotation.Input;  
import org.springframework.messaging.SubscribableChannel;  
  
public interface ConsumerService {  
      
    <span style="color: #ff0000;">String SCORE_INPUT = "mqScoreInput";  
  
    @Input(ConsumerService.SCORE_INPUT)  
    SubscribableChannel sendMessage();</span>  
  
}  複製程式碼

11. 定義啟動類和訊息消費

package com.honghu.cloud;  
  
import org.springframework.boot.SpringApplication;  
import org.springframework.boot.autoconfigure.SpringBootApplication;  
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;  
import org.springframework.cloud.stream.annotation.EnableBinding;  
import org.springframework.cloud.stream.annotation.StreamListener;  
  
import com.honghu.cloud.consumer.ConsumerService;  
import com.honghu.cloud.entity.User;  
  
@EnableEurekaClient  
@SpringBootApplication  
@EnableBinding(ConsumerService.class) //可以繫結多個介面  
public class ConsumerApplication {  
      
    public static void main(String[] args) {  
        SpringApplication.run(ConsumerApplication.class, args);  
    }  
      
    <span style="color: #ff0000;">@StreamListener(ConsumerService.SCORE_INPUT)  
    public void onMessage(Object obj) {  
        System.out.println("消費者1，接收到的訊息：" + obj);  
    }</span>  
  
}  複製程式碼

12. 分別啟動commonservice-mq-producer、commonservice-mq-consumer1

13. 通過postman來驗證訊息的傳送和接收

可以看到接收到了訊息，下一章我們介紹mq的叢集方案。

到此，整個訊息中心方案整合完畢。

歡迎大家和我一起學習spring cloud構建微服務雲架構，我這邊會將近期研發的spring cloud微服務雲架構的搭建過程和精髓記錄下來，幫助更多有興趣研發spring cloud框架的朋友，大家來一起探討spring cloud架構的搭建過程及如何運用於企業專案。
Spring Cloud大型企業分散式微服務雲構建的B2B2C電子商務平臺原始碼請加企鵝求求：一零叄八七七四六貳六完整專案的原始碼來源

（十七）Java springcloud B2B2C o2o多使用者商城 springcloud架構-訊息驅動 Spring Cloud Stream

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