ZooKeeper+Dubbo+SpringBoot 微服务Demo搭建

　1、　首先创建springBoot项目，springBoot是一堆组件的集合，在pom文件中对需要的组件进行配置。生成如下目录结构

　　　　

　　　　创建test项目，同步在test创建dubbo-api,dubbo-consume,dubbo-provider三个Model

　　　　dubbo-provider 为服务的提供者，服务的实现层

　　　　dubbo-api 为服务提供者dubbo-provider的接口层 （此处dubbo-provider,dubbo-api相当于一个微服务，dubbo-api为对外接口，由消费者dubbo-consume调用）

　　　　dubbo-consume 为服务的消费者，消费由dubbo-api提供的服务

2、配置pom.xml

　　test中的pom.xml是其他三个Module的父文件，所以公共的部分在test中配置即可。

　　test 中 pom.xml部分配置　　

 1 <modules>
 2         <module>dubbo-providermodule>
 3         <module>dubbo-consumemodule>
 4         <module>dubbo-apimodule>
 5     modules>
 6 <parent>
 7         <groupId>org.springframework.bootgroupId>
 8         <artifactId>spring-boot-starter-parentartifactId>
 9         <version>2.0.3.RELEASEversion>
10         <relativePath/> 
11     parent>
12     <properties>
13         <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
14         <project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
15         <java.version>1.8java.version>
16         <com.alibaba.dubbo.version>2.5.3com.alibaba.dubbo.version>
17         <org.apache.zookeeper.version>3.4.12org.apache.zookeeper.version>
18         <com.github.sgroschupf.zkclient.version>0.1com.github.sgroschupf.zkclient.version>
19     properties>
20 <dependencies>
21         <dependency>
22             <groupId>org.springframework.bootgroupId>
23             <artifactId>spring-boot-starter-webartifactId>
24         dependency>
25 
26         <dependency>
27             <groupId>org.springframework.bootgroupId>
28             <artifactId>spring-boot-starter-testartifactId>
29             <scope>testscope>
30         dependency>
31     dependencies>
32 
33     <build>
34         <plugins>
35             <plugin>
36                 <groupId>org.springframework.bootgroupId>
37                 <artifactId>spring-boot-maven-pluginartifactId>
38             plugin>
39         plugins>
40     build>

pom.xml

　　dubbo-api中pom.xml

 1  <parent>
 2         <artifactId>testartifactId>
 3         <groupId>com.examplegroupId>
 4         <version>0.0.1-SNAPSHOTversion>
 5     parent>
 6 
 7     <artifactId>dubbo-apiartifactId>
 8     <packaging>jarpackaging>
 9     <name>dubbo-apiname>
10     <dependencies>
11         <dependency>
12             <groupId>org.springframework.bootgroupId>
13             <artifactId>spring-boot-starter-webartifactId>
14         dependency>
15     dependencies>
16     <build>
17         <plugins>
18             <plugin>
19                 <groupId>org.springframework.bootgroupId>
20                 <artifactId>spring-boot-maven-pluginartifactId>
21             plugin>
22         plugins>
23     build>

pom.xml

　　dubbo-provider中pom.xml

 1 xml version="1.0" encoding="UTF-8"?>
 2 <project xmlns="http://maven.apache.org/POM/4.0.0"
 3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 5     <modelVersion>4.0.0modelVersion>
 6     <parent>
 7         <artifactId>testartifactId>
 8         <groupId>com.examplegroupId>
 9         <version>0.0.1-SNAPSHOTversion>
10     parent>
11 
12     <artifactId>dubbo-providerartifactId>
13     <packaging>jarpackaging>
14     <name>dubbo-providename>
15     <dependencies>
16         <dependency>
17             <groupId>org.springframework.bootgroupId>
18             <artifactId>spring-boot-starterartifactId>
19         dependency>
20         <dependency>
21             <groupId>com.examplegroupId>
22             <artifactId>dubbo-apiartifactId>
23             <version>0.0.1-SNAPSHOTversion>
24         dependency>
25         
26         <dependency>
27             <groupId>com.alibabagroupId>
28             <artifactId>dubboartifactId>
29             <exclusions>
30                 <exclusion>
31                     <groupId>org.springframeworkgroupId>
32                     <artifactId>springartifactId>
33                 exclusion>
34             exclusions>
35             <version>${com.alibaba.dubbo.version}version>
36         dependency>
37         <dependency>
38             <groupId>org.apache.zookeepergroupId>
39             <artifactId>zookeeperartifactId>
40             <version>${org.apache.zookeeper.version}version>
41         dependency>
42         <dependency>
43             <groupId>com.github.sgroschupfgroupId>
44             <artifactId>zkclientartifactId>
45             <version>${com.github.sgroschupf.zkclient.version}version>
46         dependency>
47     dependencies>
48     <build>
49         <plugins>
50             <plugin>
51                 <groupId>org.springframework.bootgroupId>
52                 <artifactId>spring-boot-maven-pluginartifactId>
53             plugin>
54         plugins>
55     build>
56 project>

pom.xml

　　dubbo-consume中pom.xml

 1 xml version="1.0" encoding="UTF-8"?>
 2 <project xmlns="http://maven.apache.org/POM/4.0.0"
 3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 5     <modelVersion>4.0.0modelVersion>
 6     <parent>
 7         <artifactId>testartifactId>
 8         <groupId>com.examplegroupId>
 9         <version>0.0.1-SNAPSHOTversion>
10     parent>
11 
12     <artifactId>dubbo-consumeartifactId>
13      <name>dubbo-consumename>
14     <packaging>jarpackaging>
15     <dependencies>
16         <dependency>
17             <groupId>org.springframework.bootgroupId>
18             <artifactId>spring-boot-starter-webartifactId>
19         dependency>
20         <dependency>
21             <groupId>com.examplegroupId>
22             <artifactId>dubbo-apiartifactId>
23             <version>0.0.1-SNAPSHOTversion>
24         dependency>
25         
26         <dependency>
27             <groupId>com.alibabagroupId>
28             <artifactId>dubboartifactId>
29             <exclusions>
30                 <exclusion>
31                     <groupId>org.springframeworkgroupId>
32                     <artifactId>springartifactId>
33                 exclusion>
34             exclusions>
35             <version>${com.alibaba.dubbo.version}version>
36         dependency>
37         <dependency>
38             <groupId>org.apache.zookeepergroupId>
39             <artifactId>zookeeperartifactId>
40             <version>${org.apache.zookeeper.version}version>
41         dependency>
42         <dependency>
43             <groupId>com.github.sgroschupfgroupId>
44             <artifactId>zkclientartifactId>
45             <version>${com.github.sgroschupf.zkclient.version}version>
46         dependency>
47     dependencies>
48     <build>
49         <plugins>
50             <plugin>
51                 <groupId>org.springframework.bootgroupId>
52                 <artifactId>spring-boot-maven-pluginartifactId>
53             plugin>
54         plugins>
55     build>
56 project>

pom.xml

 

3、dubbo-api　　

　　

　　定义接口IDubboDemoService

public interface IDubboDemoService {

    public String getString();
}

 

4、dubbo-provider

首先创建启动类，和dubbo配置文件启动类，mainConfig项目启动类就不多说了

@Configuration
@PropertySource("classpath:dubbo-provider.properties")
@ImportResource({ "classpath:dubbo-provider.xml" })
public class DubboConfig {
}

DubboConfig.java

dubbo读取的两个配置文件

首先对dubbo进行配置

#应用名称
dubbo.application.name=dubbo-provider
#注册中心类型
dubbo.registry.protocol=zookeeper
#注册中心地址
dubbo.registry.address=127.0.0.1:2181
#暴露服务方式
dubbo.protocol.name=dubbo
#暴露服务端口
dubbo.protocol.port=20880

之后对dubbo中的接口进行配置

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.application.name}" />

    
    

    
    <dubbo:registry protocol="${dubbo.registry.protocol}" address="${dubbo.registry.address}" />

    
    <dubbo:protocol name="${dubbo.protocol.name}" port="${dubbo.protocol.port}" />
　　
    <dubbo:service interface="com.example.service.IDubboDemoService"
                   ref="dubboDemoServiceImpl" retries="0" timeout="6000" />

beans>

注意：mainConfig.java和DubboConfg.java 两个文件要放在接口的上一层，否则加载时会找不到接口

　　接口实现：

@Service
public class DubboDemoServiceImpl implements IDubboDemoService {
    @Override
    public String   getString() {
        return "成功";
    }
}

 

 5、dubbo-consume

只来看下配置文件

　　dubbo.consume.properties:消费者只需要知道注册中心的类型和地址

#应用名称
dubbo.application.name=dubbo-consume
#注册中心类型
dubbo.registry.protocol=zookeeper
#注册中心地址
dubbo.registry.address=127.0.0.1:2181

　　dubbo-consume.xml:只需要配置消费方需要引用的接口即可

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.application.name}" />

    
    

    
    <dubbo:registry protocol="${dubbo.registry.protocol}" address="${dubbo.registry.address}" />

    <dubbo:reference id="consumeService" interface="com.example.service.IDubboDemoService" />

beans>

测试代码

　　

 1 @RestController
 2 @RequestMapping("/dubbo")
 3 public class DubboDemoController {
 4 
 5         @Resource
 6          public IDubboDemoService service;
 7          
 8         @RequestMapping(value = "/getString", method = RequestMethod.GET)
 9         public String getString(){
10             return service.getString();
11         }
12 
13 }

DubboDemoController.java

  到此简单的配置已经ok了。

 

6、整个流程为 服务的提供者方面 dubbo将对外的服务注册到zooKeeper上，同时在zooKeeper生成相应的node,对其监控。消费方从zooKeeper中去拿服务，所以服务的接口必须到时提供者和消费者约定好的。这样就利用dubbo+zooKeeper实现的远程RPC调用