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全国旅游大型网站建设,百度网页推广费用,建设我们的网站教案,网站建设销售怎么做目录 zookeeper为什么可作为注册中心zookeeper注册中心优缺点启动zookeeper编写springboot项目提供dubbo服务1. 服务接口2. Springboot引入dubbo实现服务接口2.1 工程目录和依赖2.2 启动程序和application.properties2.3 DubboService 实现服务接口2.4 测试api，用于…

- zookeeper为什么可作为注册中心
- zookeeper注册中心优缺点
- 启动zookeeper
- 编写springboot项目提供dubbo服务
- - 1. 服务接口
  - 2. Springboot引入dubbo实现服务接口
  - - 2.1 工程目录和依赖
    - 2.2 启动程序和application.properties
    - 2.3 @DubboService 实现服务接口
    - 2.4 测试api，用于测试启动
- 开启两个springboot应用
- dubboAdmin配置随机策略
- 客户端测试
- - zookeeper客户端查看服务信息
  - zookeeper node metadata字段含义说明
  - 服务提供者2个实例
  - 测试输出和关闭
- dubbo客户端分析
- dubbo服务端分析

zookeeper为什么可作为注册中心

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zookeeper注册中心优缺点

首先需要了解下zookeeper作为注册中心的优缺点
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结论：尽管ZooKeeper在服务注册与发现、配置管理、分布式锁等场景中非常有用，但它并不适合所有的场景。在选择使用ZooKeeper时，需要根据具体的应用需求、性能要求以及系统的复杂性来综合考虑其优缺点。在一些情况下，可以考虑使用更轻量级的解决方案如Consul或Etcd，这些工具在某些方面可能更适合特定的需求。

启动zookeeper

随意启动即可

mubi@mubideMacBook-Pro zookeeper-3.4.12 $ ./bin/zkServer.sh start conf/zoo_local.cfg
ZooKeeper JMX enabled by default
Using config: conf/zoo_local.cfg
Starting zookeeper ... STARTED

编写springboot项目提供dubbo服务

1. 服务接口

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简单的测试服务接口

package com.example.demoapi.dubboprovider;/*** @Author mubi* @Date 2025/2/21 21:46*/
public interface TestService {int add(int a, int b);
}

依赖

<dependency><groupId>com.dq</groupId><artifactId>spring-groovy-open-service</artifactId><version>1.0-SNAPSHOT</version>
</dependency>

2. Springboot引入dubbo实现服务接口

2.1 工程目录和依赖

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依赖如下

dubbo 2.7.8
spring 4.3.18.RELEASE
springboot 2.1.4.RELEASE

<?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>spring-groovy-test</artifactId><groupId>com.dq</groupId><version>1.0-SNAPSHOT</version></parent><modelVersion>4.0.0</modelVersion><artifactId>spring-api2</artifactId><dependencies><dependency><groupId>org.apache.dubbo</groupId><artifactId>dubbo-spring-boot-starter</artifactId><version>2.7.8</version></dependency><dependency><groupId>org.apache.dubbo</groupId><artifactId>dubbo</artifactId><version>2.7.8</version></dependency><dependency><groupId>org.apache.curator</groupId><artifactId>curator-framework</artifactId><version>4.0.1</version></dependency><dependency><groupId>org.apache.curator</groupId><artifactId>curator-recipes</artifactId><version>2.8.0</version></dependency><!--模块依赖--><dependency><groupId>com.dq</groupId><artifactId>spring-groovy-open-service</artifactId><version>1.0-SNAPSHOT</version></dependency><!--依赖--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><!-- https://mvnrepository.com/artifact/com.alibaba/fastjson --><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.76</version></dependency><!-- junit依赖包 --><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version><scope>test</scope></dependency></dependencies></project>

<parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.4.RELEASE</version>
</parent>

2.2 启动程序和application.properties

package com.example.demoapi;import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;/*** @Author mubi* @Date 2021/2/13 12:04*/
@EnableDubbo
@SpringBootApplication
@ComponentScan("com.example")
public class DemoApiApplication2 {public static void main(String[] args) {SpringApplication.run(DemoApiApplication2.class, args);}
}

application.properties

#https
server.port=8089# Dubbo 配置
dubbo.application.name=demoprovider
dubbo.registry.address=zookeeper://127.0.0.1:2181 
dubbo.protocol.name=dubbo
dubbo.scan.base-packages=com.example.demoapi.dubboprovider
dubbo.protocol.port=20881

2.3 @DubboService 实现服务接口

package com.example.demoapi.dubboprovider;import org.apache.dubbo.config.annotation.DubboService;
import org.springframework.stereotype.Service;@DubboService
@Service
public class TestServiceImpl implements TestService {@Overridepublic int add(int a, int b) {return a + b + 1;}
}

2.4 测试api，用于测试启动

package com.example.demoapi.control;import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;/*** @Author mubi* @Date 2021/2/13 12:04*/
@RestController
public class TestControl {@GetMapping(value = "/test")public String getTest() {return "hello test2";}}

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开启两个springboot应用

都提供同样的服务：com.example.demoapi.dubboprovider.TestService，dubbo端口不同

dubbo.protocol.port=20880
dubbo.protocol.port=20881

为了方便测试，可以故意把实现写的不一样

一个是return a + b;
一个是return a + b + 1;

dubboAdmin配置随机策略

下载一个dubboAmdin.war 然后放到tomcat webapps下启动tomcat即可，如下图
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打开dubbo-admin: http://localhost:8080/dubbo-admin-2.8.4/
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配置一个随机策略，方便测试

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客户端测试

随便起个maven项目
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spring xml配置如下

<?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.xsdhttp://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"><dubbo:application name="dubbotest" /><dubbo:registry address="zookeeper://127.0.0.1:2181" /><!-- 向注册中心订阅服务 --><dubbo:reference id="testService" interface="com.example.demoapi.dubboprovider.TestService" />
</beans>

pom.xml

<?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-demo</artifactId><groupId>com.mubi.dubbo</groupId><version>1.0-SNAPSHOT</version></parent><modelVersion>4.0.0</modelVersion><artifactId>dubbotest</artifactId><properties><maven.compiler.source>1.8</maven.compiler.source><maven.compiler.target>1.8</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><!-- spring版本号 --><spring.version>4.3.18.RELEASE</spring.version><!-- log4j日志包版本号 --><slf4j.version>1.7.18</slf4j.version><log4j.version>1.2.17</log4j.version></properties><dependencies><!--模块依赖--><dependency><groupId>com.dq</groupId><artifactId>spring-groovy-open-service</artifactId><version>1.0-SNAPSHOT</version></dependency><!-- spring begin --><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-oxm</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-tx</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context-support</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aop</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>${spring.version}</version></dependency><!-- spring end --><!-- 注册中心zookeeper begin --><dependency><groupId>org.apache.zookeeper</groupId><artifactId>zookeeper</artifactId><version>3.4.14</version></dependency><!-- 注册中心zookeeper end --><!-- 添加日志相关jar包 --><dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>${log4j.version}</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-api</artifactId><version>${slf4j.version}</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId><version>${slf4j.version}</version></dependency><!-- dubbo --><dependency><groupId>com.alibaba</groupId><artifactId>dubbo</artifactId><version>2.5.3</version><exclusions><exclusion><groupId>org.springframework</groupId><artifactId>spring</artifactId></exclusion></exclusions></dependency><dependency><groupId>com.101tec</groupId><artifactId>zkclient</artifactId><version>0.10</version></dependency></dependencies></project>