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《dubbo 实战》系列导航
- 筹备和初体验
- 与 SpringBoot 集成
- 应用 Zookeeper 注册核心
- 治理控制台 dubbo-admin
本篇概览
- 本文是《dubbo 实战》系列的第二篇,一起来实战 SpringBoot(<font color=”red”>2.3.3.RELEASE</font> 版本)与 dubbo 的集成,这也是分布式服务的罕用技术组合,本文由以下内容组成:
- 创立子工程 <font color=”blue”>springbootmulticastprovider</font>,对外提供服务;
- 创立子工程 <font color=”blue”>springbootmulticastconsumer</font>,启动后提供一个 web 接口,咱们调用这个 web 接口时,springbootmulticastconsumer 会近程调用 springbootmulticastprovider 提供的服务,如下图:
- 本篇的实战暂不应用注册核心,而是服务提供方启动时播送本人的地址,再由生产方启动时订阅,并随时近程调用,调用逻辑如下图所示:
源码下载
- 如果您不想编码,能够在 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 |
---|---|---|
我的项目主页 | https://github.com/zq2599/blo… | 该我的项目在 GitHub 上的主页 |
git 仓库地址 (https) | https://github.com/zq2599/blo… | 该我的项目源码的仓库地址,https 协定 |
git 仓库地址 (ssh) | git@github.com:zq2599/blog_demos.git | 该我的项目源码的仓库地址,ssh 协定 |
- 这个 git 我的项目中有多个文件夹,本章的利用在 <font color=”blue”>dubbopractice</font> 文件夹下,如下图红框所示:
- <font color=”blue”>dubbopractice</font> 是父子构造的工程,本篇的代码在 <font color=”red”>springbootmulticastprovider</font> 和 <font color=”red”>springbootmulticastconsumer</font> 这两个子工程中,如下图:
编码 (服务提供方)
- 先创立提供服务的工程 <font color=”blue”>springbootmulticastprovider</font>,一共要创立 4 个文件,创立程序和性能如下表:
创立程序 | 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 |
- 残缺的文件地位如下图:
- 接下来一一创立上述内容;
- 创立名为 <font color=”blue”>springbootmulticastprovider</font> 的子工程,pom.xml 内容如下,要重点关注的是新增依赖 <font color=”blue”>dubbo-spring-boot-starter</font>,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>
<!-- 不必 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>
- 配置文件 <font color=”blue”>application.yml</font>,要留神的是 <font color=”red”>registry.address</font> 的配置是播送模式:
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
- 编写服务实现类 <font color=”blue”>DemoServiceImpl.java</font>,留神 <font color=”red”>@Service</font> 注解将以后类的实例作为近程服务对外裸露:
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();
}
}
- 编写 SpringBoot 启动类 <font color=”blue”>SpringBootMulticastProviderApplication.java</font>,留神要增加 <font color=”red”>@EnableDubbo 注解 </font>:
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);
}
}
- 至此服务提供方编码实现,间接在 IDEA 上运行 <font color=”blue”>SpringBootMulticastProviderApplication</font> 类即可启动服务,启动胜利后的日志输入如下图:
编码 (服务生产方)
- 当初网络上曾经有了服务,咱们再来编写服用生产方的代码,一共要创立 6 个文件,创立程序和性能如下表:
创立程序 | 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,在这里近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 |
- 残缺的文件地位如下图:
- 接下来一一创立上述文件;
- 创立名为 <font color=”blue”>springbootmulticastconsumer</font> 的子工程,pom.xml 内容如下,同样须要依赖 <font color=”blue”>dubbo-spring-boot-starter</font>:
<?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>
<!-- 不必 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>
- 编写配置文件 <font color=”blue”>application.yml</font>,留神 dubbo.registry.address 的值,除了是播送模式,还要增加 <font color=”blue”>unicast=false</font>,这样能力保障多个消费者过程都能收到播送:
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
- 编写调用近程服务的代码,如下,可见如果想调用近程服务,只有对接口做 @Reference 正文即可,另外还通过 <font color=”red”>timeout</font> 属性减少了超时配置:
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);
}
}
- 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);
}
}
- 还要增加 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()
// 以后包门路
.apis(RequestHandlerSelectors.basePackage("com.bolingcavalry.springbootmulticastconsumer.controller"))
.paths(PathSelectors.any())
.build();}
// 构建 api 文档的详细信息函数, 留神这里的注解援用的是哪个
private ApiInfo apiInfo() {return new ApiInfoBuilder()
// 页面题目
.title("dubbo 近程调用服务的操作 ( 播送模式)")
// 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")
// 形容
.description("API 形容")
.build();}
}
- 最初是启动类 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);
}
}
- 至此,服务生产方编码实现,间接在 IDEA 上运行 <font color=”blue”>SpringBootMulticastConsumerApplication</font> 类即可启动;
- 通过浏览器拜访 swagger,地址是:http://localhost:8081/swagger-ui.html,如下图,点击红框地位开展接口详情:
- 如下图,输出 web 接口参数发动申请:
- 下图红框中就是响应的数据,内容是 <font color=”blue”>springbootmulticastconsumer</font> 近程调用 <font color=”blue”>springbootmulticastprovider</font> 的服务失去的:
- 至此,dubbo 与 springboot 集成的实战就实现了,心愿能给您提供一些参考,助您疾速开发 dubbo 利用;
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https://github.com/zq2599/blog_demos