springcloud(一)——spring-cloud-alibaba集成rocketmq

前言

在之前的工作中,微服务框架使用的是springcloud,消息中间件使用的rocketmq,这段时间看到阿里出了spring cloud alibaba集成了rocketmq,出于好奇,写了个demo

一些概念

  • 官方对 Spring Cloud Stream 的一段介绍:Spring Cloud Stream 是一个用于构建基于消息的微服务应用框架。基于 SpringBoot 创建具有生产级别的单机 Spring 应用,并且使用 Spring Integration 与 Broker 进行连接。
  • Binder :Components responsible to provide integration with the external messaging systems.【与外部消息中间件进行集成】
  • Binding:Bridge between the external messaging systems and application provided Producers and Consumers of messages (created by the Destination Binders).【在消息中间件与应用程序提供的 Provider 和 Consumer 之间提供了一个桥梁,开发者只需使用应用程序的 生产者或消费者生产或消费数据即可,屏蔽了开发者与底层消息中间件的接触。】
  • Message: The canonical data structure used by producers and consumers to communicate with Destination Binders (and thus other applications via external messaging systems).【生产者和消费者用于与目标绑定器通信的规范数据结构。】

快速在本地启动rocketmq

第一步:下载:https://www.apache.org/dyn/closer.cgi?path=rocketmq/4.3.2/rocketmq-all-4.3.2-bin-release.zip
第二步:解压
第三步:修改三个配置文件:runbroker.sh,runserver.sh,tools.sh,将其中JAVA_HOME改成自己电脑的环境配置,修改完如下

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[ ! -e "$JAVA_HOME/bin/java" ] && JAVA_HOME=自己的地址
#[ ! -e "$JAVA_HOME/bin/java" ] && JAVA_HOME=/usr/java
[ ! -e "$JAVA_HOME/bin/java" ] && error_exit "Please set the JAVA_HOME variable in your environment, We need java(x64)!"

第四步:依次执行命令

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./mqnamesrv
./mqbroker -n localhost:9876
./mqadmin updateTopic -n localhost:9876 -c DefaultCluster -t test-topic

如果启动成功,没有报错,代表启动成功哈,下面就可以开发了

开发demo

第一步:导入相关的pom

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<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>0.2.1.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>

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<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-stream-rocketmq</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 为了Endpoint 信息查看 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>io.dropwizard.metrics</groupId>
<artifactId>metrics-core</artifactId>
<version>3.2.6</version>
</dependency>

第二步:建一个springboot项目,启动类如下:

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@SpringBootApplication
@EnableBinding({ Source.class, Sink.class })
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}

第三步:创建provider

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@Service
public class RocketmqProducer {
public void send(String message) throws MQClientException, RemotingException, InterruptedException, MQBrokerException {
DefaultMQProducer producer = new DefaultMQProducer("test_producer_group");
producer.setNamesrvAddr("127.0.0.1:9876");
producer.start();

Message msg = new Message("test-topic", "test-tag", message.getBytes());
producer.send(msg);
}
}

第四步:创建consumer

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@Service
public class ReceiveService {

/**
* 默认是input,在Sink类中指定,如果想要多个input,需要写一个实现Sink的类
* @param receiveMsg
*/
@StreamListener("input")
public void receiveInput1(String receiveMsg) {
System.out.println("input receive: " + receiveMsg);
}

}

第五步:加入配置文件:

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server.port=8087
spring.application.name=spring-cloud-alibaba-rocketmq-demo

# 配置rocketmq的nameserver地址
spring.cloud.stream.rocketmq.binder.namesrv-addr=127.0.0.1:9876
# 定义name为output的binding
spring.cloud.stream.bindings.output.destination=test-topic
spring.cloud.stream.bindings.output.content-type=application/json
#定义name为input的binding
spring.cloud.stream.bindings.input.destination=test-topic
spring.cloud.stream.bindings.input.content-type=application/json
spring.cloud.stream.bindings.input.group=test-group

management.endpoint.health.show-details=always

第六步:写一个controller,启动项目,访问接口

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@RestController
@RequestMapping(value = "/api/demo/test")
public class TestController {

@Autowired
RocketmqProducer rocketmqProducer;

@RequestMapping(value = "/send", method = RequestMethod.GET)
public String send() throws InterruptedException, RemotingException, MQClientException, MQBrokerException {
rocketmqProducer.send("test rocketmq message");
return "success";
}
}

会看到控制台输出:input receive: test rocketmq message

Endpoint 信息查看

浏览器输入:http://127.0.0.1:8087/actuator/rocketmq-binder

结语

这一篇文章只是将spring cloud stream 和 rocketmq跑通了,其实对于spring cloud stream和rocketmq还是学习的阶段,只能感叹spring cloud博大精深

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