基於SpringBoot的Dubbo泛化調用的實現

            Dubbo的泛化調用不需要引入調用方的接口，只需要指定接口的全類名，就可以調用服務，一般用於框架集成。接下來就基於SpringBoot實現了Dubbo的泛化調用。

1、服務端定義

1.1 服務定義及實現

package com.smart.springboot.api;

public interface HelloServiceFacade {
    void sayHello();
}

package com.smart.springboot.service;

import com.alibaba.dubbo.config.annotation.Service;
import com.smart.springboot.api.HelloServiceFacade;

/**
 * @author : cuantianhou 2020/1/14
 */
@Service(version = "1.0.0",timeout = 20000)
public class HelloService implements HelloServiceFacade {
    @Override
    public void sayHello() {
        System.out.println("123");
    }
}

1.2 服務提供者配置

package com.smart.springboot.config;

import com.alibaba.dubbo.config.ApplicationConfig;
import com.alibaba.dubbo.config.MonitorConfig;
import com.alibaba.dubbo.config.ProtocolConfig;
import com.alibaba.dubbo.config.RegistryConfig;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author : cuantianhou 2020/4/1
 */
@Configuration
public class DubboServiceConfig {

    @Bean
    public ApplicationConfig applicationConfig(){
        ApplicationConfig applicationConfig = new ApplicationConfig();

        applicationConfig.setId("springboot-dubbo-provider");

        applicationConfig.setName("springboot-dubbo-provider");

        return applicationConfig;
    }


    @Bean
    public ProtocolConfig protocolConfig() {
        ProtocolConfig protocolConfig = new ProtocolConfig();
        protocolConfig.setPort(20880);
        protocolConfig.setName("dubbo");
        return protocolConfig;
    }


    @Bean
    public RegistryConfig registryConfig() {
        RegistryConfig registryConfig = new RegistryConfig();
        registryConfig.setAddress("zookeeper://ip1:2181?backup=ip2:2181");
        registryConfig.setCheck(false);
        return registryConfig;
    }


    @Bean
    public MonitorConfig monitorConfig() {
       MonitorConfig monitorConfig = new MonitorConfig();
       monitorConfig.setProtocol("registry");
       return monitorConfig;
    }
}

1.3 啓動類

package com.smart.springboot;

import com.alibaba.dubbo.config.spring.context.annotation.DubboComponentScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * 啓動類
 *
 * @author : cuantianhou 2020/1/14
 */

@SpringBootApplication
@DubboComponentScan("com.smart.springboot")
public class SpringBootDubboProvider {


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

1.4 pom文件

<?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">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.smart.springboot</groupId>
    <artifactId>springboot-dubbo-provider</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.0.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>


        <!--引入dubbo環境-->
        <dependency>
            <groupId>com.alibaba.boot</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>0.2.0</version>
        </dependency>

        <dependency>
            <groupId>com.smart.springboot</groupId>
            <artifactId>springboot-dubbo-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>


    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

2、消費端定義

2.1 Dubbo配置類

package com.smart.springboot.config;

import com.alibaba.dubbo.config.*;
import com.alibaba.dubbo.rpc.service.GenericService;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author : cuantianhou 2020/4/1
 */
@Configuration
public class DubboConsumerConfig {

    @Bean
    public ApplicationConfig applicationConfig(){
     ApplicationConfig applicationConfig = new ApplicationConfig();
     applicationConfig.setId("springboot-dubbo-consumer");
     applicationConfig.setName("springboot-dubbo-consumer");
     return applicationConfig;
    }

    @Bean
    public ProtocolConfig protocolConfig() {
        ProtocolConfig protocolConfig = new ProtocolConfig();
        protocolConfig.setPort(20880);
        protocolConfig.setName("dubbo");
        return protocolConfig;
    }

    @Bean
    public RegistryConfig registryConfig() {
        RegistryConfig registryConfig = new RegistryConfig();
        registryConfig.setAddress("zookeeper://10.0.20.121:2181?backup=10.0.20.131:2181,10.0.20.132:2181,10.0.20.133:2181");
        registryConfig.setCheck(false);
        return registryConfig;
    }

    @Bean
    public MonitorConfig monitorConfig() {
        MonitorConfig monitorConfig = new MonitorConfig();
        monitorConfig.setProtocol("registry");
        return monitorConfig;
    }


    @Bean
    public ReferenceConfig<GenericService> referenceConfig(){
        ReferenceConfig<GenericService> referenceConfig = new ReferenceConfig<>();
        referenceConfig.setInterface("com.smart.springboot.api.HelloServiceFacade");
        referenceConfig.setApplication(applicationConfig());
        referenceConfig.setRegistry(registryConfig());
        referenceConfig.setMonitor(monitorConfig());
        referenceConfig.setVersion("1.0.0");
        referenceConfig.setTimeout(20000);
        referenceConfig.setId("helloService");
        referenceConfig.setGeneric(Boolean.TRUE);
        return referenceConfig;
    }
}

2.2 啓動類

package com.smart.springboot;


import com.alibaba.dubbo.config.ReferenceConfig;
import com.alibaba.dubbo.rpc.service.GenericService;



import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import java.util.Arrays;


/**
 * @author : cuantianhou 2020/1/14
 */
@SpringBootApplication
public class SpringBootDubboConsumer {


    public static void main(String[] args) {
        ConfigurableApplicationContext configurableApplicationContext =   SpringApplication.run(SpringBootDubboConsumer.class,args);
        String[] beanNames = configurableApplicationContext.getBeanDefinitionNames();
        Arrays.asList(beanNames).forEach(System.out::println);
        ReferenceConfig<GenericService> referenceConfig = configurableApplicationContext.getBean(ReferenceConfig.class);
        GenericService genericService =  referenceConfig.get();
        genericService.$invoke("sayHello",null,null);
    }
}

2.3 pom文件

<?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">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.smart.springboot</groupId>
    <artifactId>springboot-dubbo-consumer</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.0.RELEASE</version>
    </parent>



    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>


        <!--引入dubbo環境-->
        <dependency>
            <groupId>com.alibaba.boot</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>0.2.0</version>
        </dependency>


    </dependencies>


    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

3、 運行結果

4 、結論

       從泛化調用實現的過程來看，我們可以對自己提供所有服務進行測試，不需要引入調用的接口，減少代碼的侵入，如有問題，歡迎指正。

5、改進

關於服務暴露的改進

5.1 關於服務的實現

/**
 * @author : cuantianhou 2020/1/14
 */
public class HelloService implements HelloServiceFacade {
    @Override
    public void sayHello() {
        System.out.println("123");
    }
}

5.2 在服務端配置中增加代碼

  @Bean
    public ServiceConfig<HelloServiceFacade> serviceConfig(){
        ServiceConfig<HelloServiceFacade> serviceConfig = new ServiceConfig<>();
        serviceConfig.setInterface("com.smart.springboot.api.HelloServiceFacade");
        serviceConfig.setRef(helloService());
        serviceConfig.setApplication(applicationConfig());
        serviceConfig.setRegistry(registryConfig());
        serviceConfig.setMonitor(monitorConfig());
        serviceConfig.setVersion("1.0.0");
        serviceConfig.setTimeout(20000);
        serviceConfig.setId("helloService");
        serviceConfig.export();
        return serviceConfig;
    }
    @Bean
    public HelloService helloService(){
        return new HelloService();
    }