2.Spring&SpringBoot整合Dubbo

Dubbo

Apache Dubbo 是⼀款⾼性能、轻量级的开源服务框架。

Apache Dubbo 提供了六⼤核⼼能⼒：⾯向接⼝代理的⾼性能RPC调⽤，智能容错和负载均衡，服务⾃动注册和发现，⾼度可扩展能⼒，运⾏期流量调度，可视化的服务治理与运维

Dubbo实现RPC原理

服务消费者去注册中⼼订阅到服务提供者的信息。然后通过dubbo进⾏远程调⽤。

相当于dubbo自定义了通信方式以及方法的代理，由手写RPC框架实现的代理、注册等代码都交给了Dubbo

Spring整合Dubbo

首先启动Zookeeper,如何启动见此处

创建Maven父工程

创建接口项目

package com.rb.myInterface;

/**
 * 定义一个功能接口
 */
public interface HelloWordService {
    String helloWord(String parameter);
}

创建服务提供项目(生产者)

POM

<?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>dubbo-by-xml-demo</artifactId>
        <groupId>org.example</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>my-producer</artifactId>
    <dependencies>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.8.0-alpha2</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.dubbo/dubbo -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.7.3</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.curator/curator-framework -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>5.2.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.curator/curator-recipes -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>5.2.1</version>
        </dependency>
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>my-interface</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>

</project>

XML

producer.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
    <!--    服务名称-->
    <dubbo:application name="hello-word-service"/>
    <!--    连接集群-->
    <dubbo:registry address="zookeeper://192.168.0.104:2181,192.168.0.104:2182,192.168.0.104:2183,192.168.0.104:2184"/>
    <!--配置当前这个服务在dubbo容器中的端⼝号，每个dubbo容器内部的服务的端⼝号唯一-->
    <dubbo:protocol name="dubbo" port="20881"/>
    <!--HelloWordService，指明该服务具体的实现bean是helloWordImpl-->
    <dubbo:service interface="com.rb.myInterface.HelloWordService" ref="helloWordImpl"/>
    <!--将服务提供者的bean注⼊到ioc容器中-->
    <bean id="helloWordImpl" class="com.rb.impl.HelloWordImpl"/>
</beans>

接口实现方法

package com.rb.impl;

import com.rb.myInterface.HelloWordService;

/**
 * 对接口的实现
 */
public class HelloWordImpl implements HelloWordService {
    public String helloWord(String s) {
        return "HelloWordImpl:"+s;
    }
}

生产者启动

import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.io.IOException;

public class ProducerRun {
    public static void main(String[] args) throws IOException {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"producer.xml"});
        context.start();
        System.in.read();
    }
}

创建服务调用项目(消费者)

POM

<?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>dubbo-by-xml-demo</artifactId>
        <groupId>org.example</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>my-customer</artifactId>
    <dependencies>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.8.0-alpha2</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.dubbo/dubbo -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.7.3</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.curator/curator-framework -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>5.2.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.curator/curator-recipes -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>5.2.1</version>
        </dependency>
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>my-interface</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

    </dependencies>

</project>

XML

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<!--    服务名称-->
    <dubbo:application name="hello-word-consumer"/>
<!--    连接集群-->
    <dubbo:registry address="zookeeper://192.168.0.104:2181,192.168.0.104:2182,192.168.0.104:2183,192.168.0.104:2184"/>
    <!--需要调⽤的dubbo中的哪个服务，注入接口全名，把HelloWordService交给IOC容器，名为helloWordService-->
    <dubbo:reference interface="com.rb.myInterface.HelloWordService" id="helloWordService"/>
</beans>

消费者启动

import com.rb.myInterface.HelloWordService;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class CustomerRun {
    public static void main(String[] args) {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"customer.xml"});
        context.start();
        //RPC 开始
        //获取⼀个代理，（类似手写RPC框架中ProxyFactory.java，只不过代理交给Dubbo了）的代理服务提供者内提供的bean
        HelloWordService helloWordService = (HelloWordService)context.getBean("helloWordService");
        //调⽤代理对象的getName⽅法。通过代理对象调到服务提供者内的bean
        String result = helloWordService.helloWord("rb");
        System.out.println(result);
        //RPC 结束
    }
}

Spring整合代码下载

下载

SpringBoot整合Dubbo

创建服务提供项目(生产者)

POM

<!--        引入‘手写RPCDemo’时创建的接口jar-->
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>rpc-interface</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.dubbo/dubbo-spring-boot-starter -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>3.0.6</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.dubbo/dubbo-registry-zookeeper -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-registry-zookeeper</artifactId>
            <version>3.0.6</version>
        </dependency>

YML

dubbo:
  application:
    name: hello-word-service #服务名称
  registry:
    address: zookeeper://192.168.0.104:2181,192.168.0.104:2182,192.168.0.104:2183,192.168.0.104:2184 #zk地址
  protocol:
    port: 20881 #配置当前这个服务在dubbo容器中的端⼝号，每个dubbo容器内部的服务的端⼝号唯一

接口实现方法

添加@DubboService

package com.rb.producer.impl;


import myinterface.HelloWord;
import org.apache.dubbo.config.annotation.DubboService;

/**
 * 对接口的实现
 */
//添加Dubbo注解
@DubboService
public class HelloWordImpl implements HelloWord {
    public String helloWord(String s) {
        return "HelloWordImpl:"+s;
    }
}

开启Dubbo支持

添加@EnableDubbo

package com.rb.producer;

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

@EnableDubbo
@SpringBootApplication
public class ProducerApplication {

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

}

启动服务

创建服务调用项目(消费者)

POM

 <!--        引入手写RPC框架时创建的接口jar-->
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>rpc-interface</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.dubbo/dubbo-spring-boot-starter -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-spring-boot-starter</artifactId>
            <version>3.0.6</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.dubbo/dubbo-registry-zookeeper -->
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo-registry-zookeeper</artifactId>
            <version>3.0.6</version>
        </dependency>

YML

server:
  port: 8081

dubbo:
  application:
    name: hello-word-consumer
  registry:
    address: zookeeper://192.168.0.104:2181,192.168.0.104:2182,192.168.0.104:2183,192.168.0.104:2184 #zk地址

开启Dubbo支持

package com.rb.customer;

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

@EnableDubbo
@SpringBootApplication
public class CustomerApplication {

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

}

发起请求

@DubboReference

服务启动去zk中订阅提供HelloWord服务的URL
将IOC中的代理对象注入

package com.rb.customer;

import com.alibaba.dubbo.config.annotation.Reference;
import myinterface.HelloWord;
import org.apache.dubbo.config.annotation.DubboReference;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class CustomerApplicationTests {
    //通过Dubbo引入代理对象
    @DubboReference
    private HelloWord helloWord;

    @Test
    void contextLoads() {
        //执行代理方法
        System.out.println(helloWord.helloWord("RB"));
    }

}

SpringBoot整合代码下载

下载

posted @ 2022-04-05 17:06 RollBack2010 阅读(80) 评论(0) 编辑收藏举报

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RB2010

学习决定命运，细节决定成败。

2.Spring&SpringBoot整合Dubbo

Dubbo

Dubbo实现RPC原理

Spring整合Dubbo

创建Maven父工程

创建接口项目

创建服务提供项目(生产者)

POM

XML

接口实现方法

生产者启动

创建服务调用项目(消费者)

POM

XML

消费者启动

Spring整合代码下载

SpringBoot整合Dubbo

创建服务提供项目(生产者)

POM

YML

接口实现方法

开启Dubbo支持

启动服务

创建服务调用项目(消费者)

POM

YML

开启Dubbo支持

发起请求

SpringBoot整合代码下载

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