基于Curator操作ZooKeeper（三）-Curator整合Spring

Java原生API操作ZooKeeper可参看：

​​Java原生API操作Zookeeper（一）​​

​​Java原生API操作Zookeeper（二）​​

相关内容：

​​基于Curator操作ZooKeeper（一）-基本操作​​

​​基于Curator操作ZooKeeper（二）-Watcher操作-补充TreeCache​​

​​基于Curator操作ZooKeeper（二）-Watcher操作​​

 

Curator整合Spring和Spring Boot方式都是差不多的。

在Spring项目中引入依赖：

<!-- <dependency>
      <groupId>org.apache.zookeeper</groupId>
      <artifactId>zookeeper</artifactId>
      <version>3.4.11</version>

    </dependency>  -->

    <dependency>
      <groupId>org.apache.curator</groupId>
      <artifactId>curator-framework</artifactId>
      <version>4.0.0</version>
    </dependency>
    <dependency>
      <groupId>org.apache.curator</groupId>
      <artifactId>curator-recipes</artifactId>
      <version>4.0.0</version>
    </dependency>

增加applicationContext-xx.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:util="http://www.springframework.org/schema/util"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd">

    <description>ZK与Spring整合，启动项目时建立与ZK的连接</description>
    <!--ZK重试策略-->
    <bean id="retryPolicy" class="org.apache.curator.retry.RetryNTimes">
        <!--重试次数-->
        <constructor-arg index="0" value="10"/>
        <!--每次间隔ms-->
        <constructor-arg index="1" value="5000"/>
    </bean>

    <!--ZK客户端-->
    <bean id="client" class="org.apache.curator.framework.CuratorFrameworkFactory" factory-method="newClient"
          init-method="start">
        <!--ZK服务地址，集群使用逗号分隔-->
        <constructor-arg index="0" value="192.168.220.136,192.168.220.137"/>
        <!--session timeout会话超时时间-->
        <constructor-arg index="1" value="10000"/>
        <!--ConnectionTimeoutMs创建连接超时时间-->
        <constructor-arg index="2" value="5000"/>
        <!--重试策略-->
        <constructor-arg index="3" ref="retryPolicy"/>
    </bean>

    <!--扩展注入ZK工具-->
    <bean id="zkCurator" class="dongguabai.ZKCurator" init-method="init">
        <constructor-arg index="0" ref="client"/>
    </bean>
</beans>

ZK客户端：

package dongguabai;

import org.apache.curator.framework.CuratorFramework;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Dongguabai
 * @date 2018/10/18 15:12
 */
public class ZKCurator {

    private static final Logger LOGGER = LoggerFactory.getLogger(ZKCurator.class);

    //ZK客户端
    private CuratorFramework client = null;

    public ZKCurator(CuratorFramework client) {
        this.client = client;
    }

    /**
     * 初始化操作
     */
    public void init(){
        //使用命名空间
        client  = client.usingNamespace("testDgb");
    }

    /**
     * 判断ZK是否连接
     * @return
     */
    public boolean isZKAlive(){
        return client!=null && client.isStarted();
    }
}

测试：

import dongguabai.ZKCurator;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * 两景Controller
 * @author Dongguabai
 * @date 2018/10/9 16:35
 */
@RestController
@RequestMapping("twoScenes")
public class ZJTwoScenesController extends BaseController{
    //todo 预留的两景Controller

    @Autowired
    private ZKCurator zkCurator;

    @RequestMapping("/check")
    public Object check(){
        return ResultHelper.success(zkCurator.isZKAlive()?"已连接":"断开");
    }
}