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Dubbo入門Dubbo簡單案例

Dubbo簡單案例

編寫一個接口

HelloService.java

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

編寫服務端

編寫接口的實作類

HelloServiceImpl.java

package com.sherlock.service.impl;

import com.sherlock.service.HelloService;
import org.apache.dubbo.config.annotation.Service;

@Service
public class HelloServiceImpl implements HelloService {
    @Override
    public String sayHello(String name) {
        return "hello " + name;
    }
}

編寫啟動類

ProviderMain.java

package com.sherlock;

import org.apache.dubbo.config.RegistryConfig;
import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

import java.io.IOException;

public class ProviderMain {
    public static void main(String[] args) throws IOException {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(ProviderConfiguration.class);
        context.start();
		
		// 讓程式停在這裡
        System.in.read();
    }

	/**
	@EnableDubbo 啟動dubbo 掃描實作類的包
	@Configuration 讓類成為配置類
	@PropertySource 讀取指定位置的配置檔案
	*/
    @EnableDubbo(scanBasePackages="com.sherlock.service.impl")
    @Configuration
    @PropertySource("classpath:/dubbo-provider.properties")
    static class ProviderConfiguration{
    	/**
    	配置 注冊中心的資訊
    	*/
        @Bean
        public RegistryConfig registryConfig() {
            RegistryConfig registryConfig = new RegistryConfig();
            // 使用zookeeper為注冊中心
            registryConfig.setAddress("zookeeper://127.0.0.1:2181?timeout=10000");

            return registryConfig;
        }
    }
}

dubbo-provider.properties檔案

dubbo.application.name=service-provider4
dubbo.protocol.name=dubbo
dubbo.protocol.port=20889

編寫消費端

編寫一個元件類

ConsumerComponent.java

package com.sherlock.bean;

import com.sherlock.service.HelloService;
import org.apache.dubbo.config.annotation.Reference;
import org.springframework.stereotype.Component;

@Component
public class ConsumerComponent {

    @Reference
    private HelloService helloService;

    public String SysHello(String name) {
        return helloService.sayHello(name);
    }
}

編寫消費端的啟動類

package com.sherlock;

import com.sherlock.bean.ConsumerComponent;
import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

import java.io.IOException;

public class ConsumerMain {

    public static void main(String[] args) throws IOException, InterruptedException {
        AnnotationConfigApplicationContext annotationConfigApplicationContext = new AnnotationConfigApplicationContext(ConsumerConfiguration.class);
        annotationConfigApplicationContext.start();
		
		// 擷取bean對象
        ConsumerComponent bean = annotationConfigApplicationContext.getBean(ConsumerComponent.class);
        System.out.println(bean);
  		while (true) {
  			// 隻有當有輸入時， 才會執行
            System.in.read();
            String sysHello = bean.SysHello("sherlock");
            System.out.println(sysHello);
        }
    }

	/**
	@Configuration 标注此類為配置類
	@ComponentScan 掃描包
	@EnableDubbo 啟動dubbo
	@PropertySource 讀取配置檔案
	*/
    @Configuration
    @ComponentScan("com.sherlock")
    @EnableDubbo
    @PropertySource("classpath:/dubbo-consumer.properties")
    static class ConsumerConfiguration {

    }
}

dubbo-consumer.properties

dubbo.application.name=service-consumer
dubbo.registry.address=zookeeper://127.0.0.1:2181
dubbo.consumer.timeout=4000

測試

首先本地先啟動zookeeper，然後在啟動服務端，最後啟動消費端， 輸入任意字元加回車，就可以看到列印資訊了

POM檔案

父工程pom檔案

<groupId>com.sherlock</groupId>
    <artifactId>dubbo-demo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>dubbo-api</module>
        <module>dubbo-provider</module>
        <module>dubbo-consumer</module>
    </modules>
    <packaging>pom</packaging>

    <properties>
        <dubbo.version>2.7.5</dubbo.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-common</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-registry-zookeeper</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-registry-nacos</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-rpc-dubbo</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-remoting-netty4</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.dubbo</groupId>
                <artifactId>dubbo-serialization-hessian2</artifactId>
                <version>${dubbo.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <!-- 日志配置 -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.16</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.5</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.5</version>
        </dependency>

        <!-- json資料化轉換 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.62</version>
        </dependency>
    </dependencies>

提供者pom檔案

<dependencies>

        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>4.0.1</version>
        </dependency>
        <dependency>
            <groupId>com.sherlock</groupId>
            <artifactId>dubbo-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>4.2.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-registry-zookeeper</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-rpc-dubbo</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-remoting-netty4</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-serialization-hessian2</artifactId>
        </dependency>
    </dependencies>

消費者pom檔案

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

        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-registry-zookeeper</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-rpc-dubbo</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-remoting-netty4</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-serialization-hessian2</artifactId>
        </dependency>
    </dependencies>

項目目錄結構

Dubbo入門Dubbo簡單案例
# dubbo Dubbo
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