spring + dubbo 学习

  新启动的项目中可能会使用到dubbo,因为之前并没有接触过,所以先小试一下

  示例运行环境准备:OS X 10.10.5 + java version "1.8.0_40"

  zookeeper 和 dubbo-admin运行在虚拟机上,环境为Centos7.0 + java version "1.8.0_73"

  项目使用gradlle管理

              

  其中dubbo-demo未项目,里面新建了两个module,api为服务提供方,console为服务消费方。注意,需要在console module中添加api 的module依赖

  api中代码如下:

  DemoService

package com.dh.demo.service;

public interface DemoService {
    public String hello(String name);
}

  DemoServiceImpl

package com.dh.demo.service.impl;

import com.dh.demo.service.DemoService;

public class DemoServiceImpl implements DemoService {
    public String hello(String name) {
        return "hello " + name;
    }
}

服务端spring配置文件dubbo-provider.xml文件内容如下

<?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">

    <!-- 提供方应用信息,用于计算依赖关系 -->
    <dubbo:application name="dubbo-demo-api"/>

    <!-- 使用zookeeper注册中心暴露服务地址 -->
    <dubbo:registry address="zookeeper://vm:2181"/>

    <bean id="demoService" class="com.dh.demo.service.impl.DemoServiceImpl"/>

    <!-- 声明需要暴露的服务接口 -->
    <dubbo:service interface="com.dh.demo.service.DemoService" ref="demoService"/>

</beans>

启动api的测试代码如下:

package com.dh.test;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.io.IOException;

public class Provider {

    public static void main(String[] args) {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("file:/xxx/dubbo-demo/api/src/resources/dubbo-provider.xml");
        context.start();
        try {
            System.in.read();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

  服务提供者的配置到此结束。

  下面是消费者的配置和代码

  spring配置文件dubbo-consumer.xml内容如下

 

<?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">

    <dubbo:application name="dubbo-demo-console"></dubbo:application>
    <!-- 使用zookeeper注册中心暴露服务地址 -->
    <dubbo:registry address="zookeeper://vm:2181"/>

    <!-- 要引用的服务 -->
    <dubbo:reference interface="com.dh.demo.service.DemoService" id="demoService"></dubbo:reference>
</beans>

  启动消费者测试的代码如下

  Consumer:

package com.dh.test;

import com.dh.demo.service.DemoService;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.io.IOException;

public class Consumer {
    public static void main(String[] args) {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("file:/xxx/dubbo-demo/console/src/resources/dubbo-consumer.xml");
        context.start();
        DemoService testRegistryService = (DemoService)context.getBean("demoService"); // 获取远程服务代理
        String hello = testRegistryService.hello("world");
        System.out.println(hello);
        try {
            System.in.read();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

  先运行提供者测试代码,再运行消费者代码。可以看到下面输出  

  

  至此测试成功

  如果运行了dubbo-admin的话可以进去后可以查看和管理服务

  这是提供者:

  

  消费者:

  

   有些童鞋可能不知道怎么运行dubbo-demo

 看dubbo的github主页就行

 如果再jdk8的环境下运行可能在启动的时候会遇到如下问题

Bean property 'URIType' is not writable or has 。。。。。后面省略

 解决方式参考:https://github.com/alibaba/dubbo/issues/50 中 stirp 的方式即可 

 注:dubbo-demo的build.gradle内容如下

group 'com.dh'
version '1.0-SNAPSHOT'

apply plugin: 'java'

sourceCompatibility = 1.5


repositories {

    maven { url "http://repo.maven.apache.org/maven2" }
}
dependencies {
    compile(group: 'com.alibaba', name: 'dubbo', version: '2.5.3') {
        exclude(module: 'spring')
    }
    compile group: 'org.apache.zookeeper', name: 'zookeeper', version: '3.4.6'
    compile group: 'com.google.zxing', name: 'core', version: '3.1.0'
    compile group: 'com.google.code.gson', name: 'gson', version: '2.3.1'
    compile group: 'io.netty', name: 'netty', version: '4.0.0.Alpha8'
    compile group: 'javax.servlet', name: 'servlet-api', version: '2.5'
    compile group: 'org.springframework', name: 'spring-context-support', version: '4.1.3.RELEASE'
    compile group: 'org.springframework', name: 'spring-web', version: '4.1.3.RELEASE'
    compile group: 'org.springframework', name: 'spring-webmvc', version: '4.1.3.RELEASE'
    compile group: 'com.alibaba', name: 'fastjson', version: '1.2.7'
    compile group: 'org.apache.httpcomponents', name: 'httpclient', version: '4.3.5'
    compile group: 'com.fasterxml.jackson.dataformat', name: 'jackson-dataformat-xml', version: '2.6.3'
    compile group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.6.3'
    compile group: 'com.thoughtworks.xstream', name: 'xstream', version: '1.4.2'
    compile group: 'org.jdom', name: 'jdom', version: '1.1.3'
    compile group: 'com.github.sgroschupf', name: 'zkclient', version: '0.1'
}

  

原文地址:https://www.cnblogs.com/modprobe/p/5412400.html