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  • dubbo实战之二:与SpringBoot集成

欢迎访问我的GitHub

https://github.com/zq2599/blog_demos

内容:所有原创文章分类汇总及配套源码,涉及Java、Docker、Kubernetes、DevOPS等;

欢迎访问我的GitHub

这里分类和汇总了欣宸的全部原创(含配套源码):https://github.com/zq2599/blog_demos

《dubbo实战》系列导航

  1. 准备和初体验
  2. 与SpringBoot集成
  3. 使用Zookeeper注册中心
  4. 管理控制台dubbo-admin

本篇概览

  • 本文是《dubbo实战》系列的第二篇,一起来实战SpringBoot(2.3.3.RELEASE版本)与dubbo的集成,这也是分布式服务的常用技术组合,本文由以下内容组成:
  1. 创建子工程springbootmulticastprovider,对外提供服务;
  2. 创建子工程springbootmulticastconsumer,启动后提供一个web接口,咱们调用这个web接口时,springbootmulticastconsumer会远程调用springbootmulticastprovider提供的服务,如下图:

在这里插入图片描述

  1. 本篇的实战暂不使用注册中心,而是服务提供方启动时广播自己的地址,再由消费方启动时订阅,并随时远程调用,调用逻辑如下图所示:

在这里插入图片描述

源码下载

  1. 如果您不想编码,可以在GitHub下载所有源码,地址和链接信息如下表所示:
名称 链接 备注
项目主页 https://github.com/zq2599/blog_demos 该项目在GitHub上的主页
git仓库地址(https) https://github.com/zq2599/blog_demos.git 该项目源码的仓库地址,https协议
git仓库地址(ssh) git@github.com:zq2599/blog_demos.git 该项目源码的仓库地址,ssh协议
  1. 这个git项目中有多个文件夹,本章的应用在dubbopractice文件夹下,如下图红框所示:

在这里插入图片描述
3. dubbopractice是父子结构的工程,本篇的代码在springbootmulticastproviderspringbootmulticastconsumer这两个子工程中,如下图:

在这里插入图片描述

编码(服务提供方)

  • 先创建提供服务的工程springbootmulticastprovider,一共要创建4个文件,创建顺序和功能如下表:
创建顺序 文件名 作用
1 pom.xml 工程的pom文件
2 src/main/resources/application.yml 配置文件
3 DemoServiceImpl.java 提供具体的服务
4 SpringBootMulticastProviderApplication.java 启动类
  • 完整的文件位置如下图:

在这里插入图片描述

  • 接下来逐个创建上述内容;
  1. 创建名为springbootmulticastprovider的子工程,pom.xml内容如下,要重点关注的是新增依赖dubbo-spring-boot-starter,这就是dubbo在SpringBoot环境的starter依赖:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>dubbopractice</artifactId>
        <groupId>com.bolingcavalry</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <modelVersion>4.0.0</modelVersion>
    <groupId>com.bolingcavalry</groupId>
    <artifactId>springbootmulticastprovider</artifactId>
    <version>1.0-SNAPSHOT</version>
    <name>springbootmulticastprovider</name>
    <description>Demo project for dubbo service provider from Spring Boot, multicast mode</description>

    <!--不用spring-boot-starter-parent作为parent时的配置-->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${springboot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.bolingcavalry</groupId>
            <artifactId>practiceinterface</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>${springboot.version}</version>
            </plugin>
        </plugins>
    </build>
</project>
  1. 配置文件application.yml,要注意的是registry.address的配置是广播模式:
dubbo:
  application:
    #application-name 本模块名字
    name: springboot-multicast-provider
    id: springboot-multicast-provider
  registry:
    address: multicast://224.5.6.7:1234
    id: registry
  protocol:
    name: dubbo
    port: 20880
  1. 编写服务实现类DemoServiceImpl.java,注意@Service注解将当前类的实例作为远程服务对外暴露:
package com.bolingcavalry.springbootmulticastprovider;

import com.bolingcavalry.dubbopractice.service.DemoService;
import lombok.extern.slf4j.Slf4j;
import org.apache.dubbo.config.annotation.Service;
import org.apache.dubbo.rpc.RpcContext;

@Slf4j
@Service
public class DemoServiceImpl implements DemoService {
    @Override
    public String sayHello(String name) {
        log.info("I'm springboot-multicast-provider, Hello " + name + ", request from consumer: " + RpcContext.getContext().getRemoteAddress());
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "I'm springboot-multicast-provider, Hello " + name + ", response from provider: " + RpcContext.getContext().getLocalAddress();
    }
}
  1. 编写SpringBoot启动类SpringBootMulticastProviderApplication.java,注意要添加@EnableDubbo注解
package com.bolingcavalry.springbootmulticastprovider;

import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@EnableDubbo
public class SpringBootMulticastProviderApplication {
    public static void main(String[] args) {
        SpringApplication.run(SpringBootMulticastProviderApplication.class, args);
    }
}
  1. 至此服务提供方编码完成,直接在IDEA上运行SpringBootMulticastProviderApplication类即可启动服务,启动成功后的日志输出如下图:

在这里插入图片描述

编码(服务消费方)

  • 现在网络上已经有了服务,咱们再来编写服用消费方的代码,一共要创建6个文件,创建顺序和功能如下表:
创建顺序 文件名 作用
1 pom.xml 工程的pom文件
2 src/main/resources/application.yml 配置文件
3 RemoteInvokeServiceImpl.java service层,在这里远程调用服务提供方的服务
4 DemoController.java web接口类,对外提供web服务
5 SwaggerConfig.java swagger配置类,便于通过页面测试接口
6 SpringBootMulticastConsumerApplication.java 启动类
  • 完整的文件位置如下图:

在这里插入图片描述

  • 接下来逐个创建上述文件;
  1. 创建名为springbootmulticastconsumer的子工程,pom.xml内容如下,同样需要依赖dubbo-spring-boot-starter
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>dubbopractice</artifactId>
        <groupId>com.bolingcavalry</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <modelVersion>4.0.0</modelVersion>
    <groupId>com.bolingcavalry</groupId>
    <artifactId>springbootmulticastconsumer</artifactId>
    <version>1.0-SNAPSHOT</version>
    <name>springbootmulticastconsumer</name>
    <description>Demo project for dubbo service consumer from Spring Boot, multicast mode</description>

    <!--不用spring-boot-starter-parent作为parent时的配置-->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${springboot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- swagger依赖 -->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
        </dependency>
        <!-- swagger-ui -->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
        </dependency>
        <dependency>
            <groupId>com.bolingcavalry</groupId>
            <artifactId>practiceinterface</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>${springboot.version}</version>
            </plugin>
        </plugins>
    </build>
</project>
  1. 编写配置文件application.yml,注意dubbo.registry.address的值,除了是广播模式,还要添加unicast=false,这样才能保证多个消费者进程都能收到广播:
dubbo:
  application:
    name: springboot-multicast-consumer
    id: springboot-multicast-consumer
    qosEnable: false
  registry:
    address: multicast://224.5.6.7:1234?unicast=false
    id: registry
  protocol:
    name: dubbo
    port: 20880
server:
  port: 8081
  1. 编写调用远程服务的代码,如下,可见如果想调用远程服务,只要对接口做@Reference注释即可,另外还通过timeout属性增加了超时配置:
package com.bolingcavalry.springbootmulticastconsumer.service;

import com.bolingcavalry.dubbopractice.service.DemoService;
import org.apache.dubbo.config.annotation.Reference;
import org.springframework.stereotype.Service;

@Service
public class RemoteInvokeServiceImpl {

    @Reference(timeout = 2000)
    private DemoService demoService;

    public String sayHello(String name) {
        return "from dubbo remote (multicast mode) : " + demoService.sayHello(name);
    }
}
  1. 再编写对外提供web服务的Controller类:
package com.bolingcavalry.springbootmulticastconsumer.controller;

import com.bolingcavalry.springbootmulticastconsumer.service.RemoteInvokeServiceImpl;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/demo")
@Api(tags = {"DemoController"})
public class DemoController {
    @Autowired
    private RemoteInvokeServiceImpl remoteInvokeService;

    @ApiOperation(value = "获取dubbo service provider的响应", notes="\"获取dubbo service provider的响应")
    @ApiImplicitParam(name = "name", value = "昵称", paramType = "path", required = true, dataType = "String")
    @RequestMapping(value = "/{name}", method = RequestMethod.GET)
    public String sayHello(@PathVariable String name){
        return remoteInvokeService.sayHello(name);
    }
}
  1. 还要添加swagger配置类:
package com.bolingcavalry.springbootmulticastconsumer;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
import springfox.documentation.service.Tag;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

@Configuration
@EnableSwagger2
public class SwaggerConfig {

    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .tags(new Tag("DemoController", "演示服务"))
                .select()
                // 当前包路径
                .apis(RequestHandlerSelectors.basePackage("com.bolingcavalry.springbootmulticastconsumer.controller"))
                .paths(PathSelectors.any())
                .build();
    }

    //构建 api文档的详细信息函数,注意这里的注解引用的是哪个
    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                //页面标题
                .title("dubbo远程调用服务的操作(广播模式)")
                //创建人
                .contact(new Contact("程序员欣宸", "https://github.com/zq2599/blog_demos", "zq2599@gmail.com"))
                //版本号
                .version("1.0")
                //描述
                .description("API 描述")
                .build();
    }
}
  1. 最后是启动类SpringBootMulticastConsumerApplication.java:
package com.bolingcavalry.springbootmulticastconsumer;

import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@EnableDubbo
public class SpringBootMulticastConsumerApplication {
    public static void main(String[] args) {
        SpringApplication.run(SpringBootMulticastConsumerApplication.class, args);
    }
}
  1. 至此,服务消费方编码完成,直接在IDEA上运行SpringBootMulticastConsumerApplication类即可启动;
  2. 通过浏览器访问swagger,地址是:http://localhost:8081/swagger-ui.html ,如下图,点击红框位置展开接口详情:

在这里插入图片描述

  1. 如下图,输入web接口参数发起请求:
    在这里插入图片描述

  2. 下图红框中就是响应的数据,内容是springbootmulticastconsumer远程调用springbootmulticastprovider的服务得到的:

在这里插入图片描述

  • 至此,dubbo与springboot集成的实战就完成了,希望能给您提供一些参考,助您快速开发dubbo应用;
来源:https://www.cnblogs.com/bolingcavalry/p/14484056.html

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