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。
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