一、SpringBoot 整合 Dubbo 光速入门

0、docker 启动 zk

docker-compose.yml

version: '3'
services:
  zoo1:
    image: zookeeper
    restart: always
    hostname: zoo1
    ports:
      - 2181:2181

docker-compose up -d

1、创建父 pom

    4.0.0

    com.csp
    dubbo-exam
    pom
    1.0-SNAPSHOT
    
        dubbo-api
        dubbo-provider
        dubbo-consumer
    

    
        org.springframework.boot
        spring-boot-starter-parent
        2.1.7.RELEASE
         
    

    
        
            org.springframework.boot
            spring-boot-starter-web
        

        
            org.springframework.boot
            spring-boot-starter-test
            test
        

        
            org.apache.dubbo
            dubbo-spring-boot-starter
            2.7.7
            
                
                    org.slf4j
                    slf4j-log4j12
                
            
        

        
            org.apache.dubbo
            dubbo
            2.7.7
        

        
            org.apache.curator
            curator-framework
            4.0.1
        

        
            org.apache.curator
            curator-recipes
            2.8.0
        

        
            org.apache.zookeeper
            zookeeper
            3.4.13
            pom
            
                
                    org.slf4j
                    slf4j-log4j12
                
            
        

        
            com.101tec
            zkclient
            0.10
        
    

2、创建 api maven 工程

package com.csp.dubbo.demo;

public interface TestApiService {
    String sayHello(String name);
}

3、创建服务提供者

Application

package com.csp.dubbo.demo.provider;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class);
    }
}

TestApiServiceImpl

package com.csp.dubbo.demo.provider.impl;

import com.csp.dubbo.demo.TestApiService;
import org.apache.dubbo.config.annotation.DubboService;

@DubboService(version = "1.0.0", interfaceClass = TestApiService.class)
public class TestApiServiceImpl implements TestApiService {

    @Override
    public String sayHello(String name) {
        System.out.println("我是 provider， 我被调用了");
        return name + " say hello";
    }
}

application.properties

#spring项目名
spring.application.name=dubbo_auto_configuration_provider_demo
#Dubbo provider configuration
dubbo.application.name=dubbo_provider
dubbo.registry.protocol=zookeeper
dubbo.registry.address=zookeeper://127.0.0.1:2181
dubbo.protocol.name=dubbo
dubbo.protocol.port=20880
#扫描注解包通过该设置将服务注册到zookeeper
dubbo.scan.base-packages=com.csp.dubbo.demo.provider

4、创建消费者

Application

package com.csp.dubbo.demo.consumer;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class);
    }
}

TestController

package com.csp.dubbo.demo.consumer.controller;

import com.csp.dubbo.demo.Test2Service;
import com.csp.dubbo.demo.TestApiService;
import org.apache.dubbo.config.annotation.DubboReference;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TestController {

    @DubboReference(version = "1.0.0")
    TestApiService testApiService;

    @GetMapping("/sayHello")
    public Object sayHello(String name) {
        String hello = testApiService.sayHello(name);
        return hello;
    }
}

application.properties

#spring项目名
spring.application.name=dubbo_auto_configuration_consumer_demo
#Dubbo provider configuration
dubbo.application.name=dubbo_consumer
dubbo.registry.protocol=zookeeper
dubbo.registry.address=zookeeper://127.0.0.1:2181

server.port=8082

5、总结

1. provider 和 consumer 必须实现同一个接口。
2. consumer 设置的 version 也要和 provider 写的 version 一致。
3. 实际上，provider 是不需要启动 web 容器的！