1.dubbon 基本使用

  

<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>
    <packaging>war</packaging>
    <artifactId>dubbo-server</artifactId>
    <properties>
        <spring.version>5.1.9.RELEASE</spring.version>
        <zookeeper.version>4.0.0</zookeeper.version>
        <dubbo.version>2.7.5</dubbo.version>
    </properties>
    <dependencies>
        <!-- spring的坐标 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- springmvc的坐标 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>${zookeeper.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>${zookeeper.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.dubbo</groupId>
            <artifactId>dubbo</artifactId>
            <version>${dubbo.version}</version>
        </dependency>
        <dependency>
            <groupId>com.example.demo</groupId>
            <artifactId>dubbo-interface</artifactId>
            <version>1.0-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <configuration>
                    <path>/</path>
                    <port>8093</port>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

<?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:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:dubbo="http://dubbo.apache.org/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/mvc
	http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
	http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans.xsd
	http://www.springframework.org/schema/context
	http://www.springframework.org/schema/context/spring-context-4.0.xsd
    http://dubbo.apache.org/schema/dubbo
	http://dubbo.apache.org/schema/dubbo/dubbo.xsd">
    <mvc:annotation-driven/>
    <dubbo:protocol port="20884"></dubbo:protocol>
    <dubbo:application name="dubbo-service"/>
    <dubbo:registry address="zookeeper://127.0.0.1:2181"></dubbo:registry>
    <dubbo:annotation package="com.example.demo.service.impl"/>
    <dubbo:metadata-report  address="zookeeper://127.0.0.1:2181"></dubbo:metadata-report>
</beans>

@Service(weight = 500)
public class UserServiceImpl implements UserService {
    public String sayHello() {
        return "hello dubbon client 3";
    }
}

2.dubbon 的高级特性

这个也不算啥高级特性，图形用户界面最没水平

负载均衡

负载均衡

Random 随机访问

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