idea開發dubbo服務註冊到zookeeper入門示例

lightTrace發表於2018-07-29

我知道網上有很多優秀的部落格介紹dubbo+zookeeper，我自己也是參考別人優秀的東西來學習的，我只是想記錄下自己搭建的過程，以後看到這篇文章就能很快撿起來！

首先zookeeper下載地址：http://mirrors.cnnic.cn/apache/zookeeper/zookeeper-3.4.8/zookeeper-3.4.8.tar.gz
然後解壓到指定目錄E:\zookeeper（可隨意指定）：
修改zoo_sample.cfg 檔名(E:\zookeeper\zookeeper-3.4.8\conf) 為 zoo.cfg
主要修改一下日誌位置，具體配置檔案如下：

# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial 
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between 
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just 
# example sakes.
dataDir=E:\\zookeeper\\data
dataLogDir=E:\\zookeeper\\log

# the port at which the clients will connect
clientPort=2181
# the maximum number of client connections.
# increase this if you need to handle more clients
#maxClientCnxns=60
#
# Be sure to read the maintenance section of the 
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
#autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
#autopurge.purgeInterval=1

配置檔案簡單解析
1、tickTime：這個時間是作為 Zookeeper 伺服器之間或客戶端與伺服器之間維持心跳的時間間隔，也就是每個 tickTime 時間就會傳送一個心跳。
2、dataDir：顧名思義就是 Zookeeper 儲存資料的目錄，預設情況下，Zookeeper 將寫資料的日誌檔案也儲存在這個目錄裡。
3、dataLogDir：顧名思義就是 Zookeeper 儲存日誌檔案的目錄
4、clientPort：這個埠就是客戶端連線 Zookeeper 伺服器的埠，Zookeeper 會監聽這個埠，接受客戶端的訪問請求。

進入到bin目錄，並且啟動zkServer.cmd,就啟動了zookeeper，我們先把它放在這裡不動，然後來操作dubbo的rpc服務！

用idea建立一個maven專案叫dubbo-demo，然後在dubbo-demo下新建三個模組：dubbo-api,dubbo-provider,dubbo-consumer。
dubbo-api是用來提供服務介面的，dubbo-provider繼承dubbo-api實現介面提供具體服務，dubbo-consumer是消費者呼叫服務獲取所需要的功能！

在dubbo-demo中的pom.xml新增依賴：

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>DubboDemo</groupId>
  <artifactId>DubboDemo</artifactId>
  <packaging>pom</packaging>
  <version>1.0-SNAPSHOT</version>
  <modules>
    <module>dubbo-api</module>
    <module>dubbo-provider</module>
    <module>dubbo-consumer</module>
    <module>dubbo-consumer2</module>
  </modules>
  <name>DubboDemo Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <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版本號 -->
    <spring.version>4.2.5.RELEASE</spring.version>

    <!-- mybatis版本號 -->
    <mybatis.version>3.2.8</mybatis.version>

    <!-- mysql驅動版本號 -->
    <mysql-driver.version>5.1.29</mysql-driver.version>

    <!-- log4j日誌包版本號 -->
    <slf4j.version>1.7.18</slf4j.version>
    <log4j.version>1.2.17</log4j.version>

  </properties>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <!-- 新增jstl依賴 -->
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>

    <dependency>
      <groupId>javax</groupId>
      <artifactId>javaee-api</artifactId>
      <version>7.0</version>
    </dependency>

    <!-- 新增junit4依賴 -->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <!-- 指定範圍，在測試時才會載入 -->
      <scope>test</scope>
    </dependency>

    <!-- 新增spring核心依賴 -->
    <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>

    <!-- 新增mybatis依賴 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>

    <!-- 新增mybatis/spring整合包依賴 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.2.2</version>
    </dependency>

    <!-- 新增mysql驅動依賴 -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql-driver.version}</version>
    </dependency>
    <!-- 新增資料庫連線池依賴 -->
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>1.2.2</version>
    </dependency>

    <!-- 新增fastjson -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.22</version>
    </dependency>

    <!-- 新增日誌相關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>

    <!-- log end -->
    <!-- 映入JSON -->
    <dependency>
      <groupId>org.codehaus.jackson</groupId>
      <artifactId>jackson-mapper-asl</artifactId>
      <version>1.9.13</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.8.0</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.8.0</version>
    </dependency>

    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.3.1</version>
    </dependency>

    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.4</version>
    </dependency>

    <dependency>
      <groupId>commons-codec</groupId>
      <artifactId>commons-codec</artifactId>
      <version>1.9</version>
    </dependency>

    <dependency>
      <groupId>org.quartz-scheduler</groupId>
      <artifactId>quartz</artifactId>
      <version>2.2.1</version>
    </dependency>

    <dependency>
      <groupId>org.apache.shiro</groupId>
      <artifactId>shiro-core</artifactId>
      <version>1.3.2</version>
    </dependency>
    <dependency>
      <groupId>org.apache.shiro</groupId>
      <artifactId>shiro-web</artifactId>
      <version>1.3.2</version>
    </dependency>
    <dependency>
      <groupId>org.apache.shiro</groupId>
      <artifactId>shiro-spring</artifactId>
      <version>1.3.2</version>
    </dependency>
    <dependency>
      <groupId>org.apache.shiro</groupId>
      <artifactId>shiro-ehcache</artifactId>
      <version>1.3.2</version>
    </dependency>
    <dependency>
      <groupId>org.apache.zookeeper</groupId>
      <artifactId>zookeeper</artifactId>
      <version>3.4.9</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>
  <build>
    <finalName>DubboDemo</finalName>
  </build>
</project>

然後在dubbo-api中新介面：

package com.alibaba.dubbo.demo;

import java.util.List;

/**
 * Created by wy on 2017/4/13.
 */
public interface DemoService {
    List<String> getPermissions(Long id);
}

然後maven install將dubbo-api打包供生產者和消費者使用。

在dubbo-provider中的resource目錄下新建provider.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">
    <!--定義了提供方應用資訊，用於計算依賴關係；在 dubbo-admin 或 dubbo-monitor 會顯示這個名字，方便辨識-->
    <dubbo:application name="demotest-provider" owner="programmer" organization="dubbox"/>
    <!--使用 zookeeper 註冊中心暴露服務，注意要先開啟 zookeeper-->
    <dubbo:registry address="zookeeper://localhost:2181"/>
    <!-- 用dubbo協議在20880埠暴露服務 -->
    <dubbo:protocol name="dubbo" port="20880" />
    <!--使用 dubbo 協議實現定義好的 api.PermissionService 介面-->
    <dubbo:service interface="com.alibaba.dubbo.demo.DemoService" ref="demoService" protocol="dubbo" />
    <!--具體實現該介面的 bean-->
    <bean id="demoService" class="com.alibaba.dubbo.demo.impl.DemoServiceImpl"/>
</beans>

同時修改dubbo-provider中pom.xml檔案，將dubbo-api依賴進來：

<?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>DubboDemo</artifactId>
        <groupId>DubboDemo</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>dubbo-provider</artifactId>

    <dependencies>
        <dependency>
            <groupId>DubboDemo</groupId>
            <artifactId>dubbo-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>


</project>

同時新建實現類DemoServiceImpl：

package com.alibaba.dubbo.demo.impl;

import com.alibaba.dubbo.demo.DemoService;

import java.util.ArrayList;
import java.util.List;

public class DemoServiceImpl implements DemoService {
    public List<String> getPermissions(Long id) {
        List<String> demo = new ArrayList<String>();
        demo.add(String.format("Permission_%d", id - 1));
        demo.add(String.format("Permission_%d", id));
        demo.add(String.format("Permission_%d", id + 1));
        return demo;
    }
}

然後建一個主函式Provider來啟動生產者：

package com.alibaba.dubbo.demo.impl;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.io.IOException;

/**
 * Created by wy on 2017/4/13.
 */
public class Provider {
        public static void main(String[] args) throws IOException {
            ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("provider.xml");
            System.out.println(context.getDisplayName() + ": here");
            context.start();
            System.out.println("服務已經啟動...");
            System.in.read();
        }
    }

控制檯輸出“服務已經啟動…”表示生產者provider已經開始提供服務

同樣對於dubbo-consumer也是同樣的三步走，首先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>DubboDemo</artifactId>
        <groupId>DubboDemo</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>dubbo-consumer</artifactId>
    <dependencies>
        <dependency>
            <groupId>DubboDemo</groupId>
            <artifactId>dubbo-api</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>


</project>

在resource下新建consumer.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">
    <dubbo:application name="demotest-consumer" owner="programmer" organization="dubbox"/>
    <!--向 zookeeper 訂閱 provider 的地址，由 zookeeper 定時推送-->
    <dubbo:registry address="zookeeper://localhost:2181"/>
    <!--使用 dubbo 協議呼叫定義好的 api.PermissionService 介面-->
    <dubbo:reference id="permissionService" interface="com.alibaba.dubbo.demo.DemoService"/>
</beans>

直接新建主函式Consumer來呼叫服務：

package com.alibaba.dubbo.consumer;

import com.alibaba.dubbo.demo.DemoService;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Consumer {
    public static void main(String[] args) {
        //測試常規服務
        ClassPathXmlApplicationContext context =
                new ClassPathXmlApplicationContext("consumer.xml");
        context.start();
        System.out.println("consumer start");
        DemoService demoService = context.getBean(DemoService.class);
        System.out.println("consumer");
        System.out.println(demoService.getPermissions(1L));
    }
}

看到相應輸出就表示呼叫成功！

一定記得idea的mvn install和src及resource目錄的正確設定哦！！！

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idea開發dubbo服務註冊到zookeeper入門示例

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