目录

ZooKeeper Java API操作

引入maven坐标

​​​​​​​节点的操作

ZooKeeper Java API操作

这里操作Zookeeper的JavaAPI使用的是一套zookeeper客户端框架 Curator ，解决了很多Zookeeper客户端非常底层的细节开发工作 。

Curator包含了几个包：

curator-framework：对zookeeper的底层api的一些封装

curator-recipes：封装了一些高级特性，如：Cache事件监听、选举、分布式锁、分布式计数器等

Maven依赖(使用curator的版本：2.12.0，对应Zookeeper的版本为：3.4.x，如果跨版本会有兼容性问题，很有可能导致节点操作失败)：

​​​​​​​引入maven坐标

<dependencies>

        <dependency>

            <groupId>org.apache.curator</groupId>

            <artifactId>curator-framework</artifactId>

            <version>2.12.0</version>

        </dependency>



        <dependency>

            <groupId>org.apache.curator</groupId>

            <artifactId>curator-recipes</artifactId>

            <version>2.12.0</version>

        </dependency>



        <dependency>

            <groupId>com.google.collections</groupId>

            <artifactId>google-collections</artifactId>

            <version>1.0</version>

        </dependency>

        <dependency>

            <groupId>junit</groupId>

            <artifactId>junit</artifactId>

            <version>RELEASE</version>

        </dependency>

        <dependency>

            <groupId>org.slf4j</groupId>

            <artifactId>slf4j-simple</artifactId>

            <version>1.7.25</version>

        </dependency>

    </dependencies>



    <build>

        <plugins>

            <!-- java编译插件 -->

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-compiler-plugin</artifactId>

                <version>3.2</version>

                <configuration>

                    <source>1.8</source>

                    <target>1.8</target>

                    <encoding>UTF-8</encoding>

                </configuration>

            </plugin>

        </plugins>

   </build>

​​​​​​​节点的操作

/*

 创建节点

 */

@Test

public void createZnode() throws Exception {

//1:定制一个重试策略

/*

param1: 重试的间隔时间

param2:重试的最大次数

 */

RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000,1);

//2:获取一个客户端对象

/*

   param1:要连接的Zookeeper服务器列表

   param2:会话的超时时间

   param3:链接超时时间

   param4:重试策略

 */

String connectionStr = "192.168.88.161:2181,192.168.88.162:2181,192.168.88.163:2181";

CuratorFramework client = CuratorFrameworkFactory.newClient(connectionStr, 8000, 8000, retryPolicy);



//3:开启客户端

client.start();

//4:创建节点

/*

  节点类型:

   CreateMode.PERSISTENT:永久节点

   CreateMode.PERSISTENT_SEQUENTIAL:永久序列化节点

   CreateMode.EPHEMERAL:临时节点

   CreateMode.EPHEMERAL_SEQUENTIAL:临时序列化节点

   /hello2 :节点路径

   world :节点数据

 */

client.create().creatingParentsIfNeeded().withMode(CreateMode.PERSISTENT).forPath("/hello2","world".getBytes());

//5:关闭客户端

client.close();

}

标签：Zookeeper,Java,CreateMode,ZooKeeper,curator,API,节点,客户端
来源： https://blog.csdn.net/xiaoweite1/article/details/117136304