Spring Cloud Stream整合RocketMQ的搭建方法_Java

spring cloud stream整合rocketmq

这里书接上回，默认你已经搭建好了rocketmq主从异步集群，前面文章已经介绍过搭建方法。

1、spring cloud stream介绍

spring cloud stream是一个框架，用于构建与共享消息系统连接的高度可扩展的事件驱动微服务。

官网：https://spring.io/projects/spring-cloud-stream

该框架提供了一个灵活的编程模型，该模型基于已经建立和熟悉的spring习惯用法和最佳实践，包括对持久pub/sub语义、消费者组和有状态分区的支持。

spring cloud stream的核心构建块是：

destination binders:负责提供与外部消息传递系统集成的组件。
destination bindings:外部消息系统和最终用户提供的应用程序代码(生产者/消费者)之间的桥梁。
message:生产者和消费者用来与目标绑定器(以及通过外部消息系统的其他应用程序)进行通信的规范数据结构。

2、生产者

2.1 引入依赖

<dependencies>
        <dependency>
            <groupid>com.alibaba.cloud</groupid>
            <artifactid>spring-cloud-alibaba-dependencies</artifactid>
            <version>${spring-cloud-alibaba.version}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
        <dependency>
            <groupid>org.springframework.boot</groupid>
            <artifactid>spring-boot-starter-web</artifactid>
        </dependency>
        <dependency>
            <groupid>com.alibaba.cloud</groupid>
            <artifactid>spring-cloud-starter-stream-rocketmq</artifactid>
            <version>2.2.2.release</version>
            <exclusions>
                <exclusion>
                    <groupid>org.apache.rocketmq</groupid>
                    <artifactid>rocketmq-client</artifactid>
                </exclusion>
                <exclusion>
                    <groupid>org.apache.rocketmq</groupid>
                    <artifactid>rocketmq-acl</artifactid>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupid>org.apache.rocketmq</groupid>
            <artifactid>rocketmq-client</artifactid>
            <version>4.7.1</version>
        </dependency>
        <dependency>
            <groupid>org.apache.rocketmq</groupid>
            <artifactid>rocketmq-acl</artifactid>
            <version>4.7.1</version>
        </dependency>
        <dependency>
            <groupid>org.springframework.boot</groupid>
            <artifactid>spring-boot-starter-test</artifactid>
            <scope>test</scope>
        </dependency>
    </dependencies>

注意，rocketmq官方维护的spring-cloud-stream依赖中的rocketmq版本为4.4，需要排出后加入4.7.1的依。

2.2 编写配置文件

spring:
  application:
    name: my-spring-cloud-rocketmq-producer
  cloud:
    stream:
      bindings:
        output:
          destination: topictest
      rocketmq:
        binder:
          name-server: 192.168.159.34:9876
server:
  port: 8080

2.3 启动类打上注解

import org.springframework.boot.springapplication;
import org.springframework.boot.autoconfigure.springbootapplication;
import org.springframework.cloud.stream.annotation.enablebinding;
import org.springframework.cloud.stream.messaging.source;
@enablebinding(source.class)
@springbootapplication
public class myspringcloudrocketmqproducerapplication {
    public static void main(string[] args) {
        springapplication.run(myspringcloudrocketmqproducerapplication.class, args);
    }
}

其中，@enablebinding(source.class)指向配置文件的output参数。

2.4 编写生产者程序

import org.apache.rocketmq.common.message.messageconst;
import org.springframework.cloud.stream.messaging.source;
import org.springframework.messaging.message;
import org.springframework.messaging.messageheaders;
import org.springframework.messaging.support.messagebuilder;
import org.springframework.stereotype.component;
import javax.annotation.resource;
import java.util.hashmap;
import java.util.map;
@component
public class myproducer {
    @resource
    private source source;
    public void sendmessage(string msg){
        //封装消息头
        map<string,object> headers=new hashmap<>();
        headers.put(messageconst.property_tags,"taga");
        messageheaders messageheaders=new messageheaders(headers);
        //创建消息对象
        message<string> message = messagebuilder.createmessage(msg, messageheaders);
        //发送消息
        source.output().send(message);
    }
}

2.5 编写单元测试发送消息

@springboottest
class myspringcloudrocketmqproducerapplicationtests {
    @autowired
    private myproducer producer;
    @test
    void contextloads() {
        producer.sendmessage("hello,spring cloud stream message");
    }
}

3、消费者

3.1 引入依赖

与生产者相同。

3.2 编写配置文件

spring:
  application:
    name: my-spring-cloud-rocketmq-consumer
  cloud:
    stream:
      bindings:
      	# input消费者
        input:
          destination: topictest
          group: spring-cloud-stream-consumer-group
      # 配置rocketmq
      rocketmq:
        binder:
          name-server: 192.168.159.34:9876
server:
  port: 8081

3.3 启动类打上注解

import org.springframework.boot.springapplication;
import org.springframework.boot.autoconfigure.springbootapplication;
import org.springframework.cloud.stream.annotation.enablebinding;
import org.springframework.cloud.stream.messaging.sink;
@enablebinding(sink.class)
@springbootapplication
public class myspringcloudrocketmqconsumerapplication {
    public static void main(string[] args) {
        springapplication.run(myspringcloudrocketmqconsumerapplication.class, args);
    }
}

其中@enablebinding(sink.class)指向配置文件的input参数。

3.4 编写消费者程序

import org.springframework.cloud.stream.annotation.streamlistener;
import org.springframework.cloud.stream.messaging.sink;
import org.springframework.stereotype.component;
@component
public class myconsumer {
    @streamlistener(sink.input)
    public void processmessage(string message){
        system.out.println("收到的消息："+message);
    }
}

先启动消费者，使用单元测试发送消息。