zookeeper基本操作

zookeeper基本操作

一、安装zookeeper

启动命令

bin/zookeeper-server-start.sh config/zookeeper.properties

二、Maven依赖

<dependency>    <groupId>org.apache.curator</groupId>    <artifactId>curator-framework</artifactId>    <version>2.9.0</version></dependency><dependency>    <groupId>org.apache.curator</groupId>    <artifactId>curator-client</artifactId>    <version>2.9.0</version></dependency><dependency>    <groupId>org.apache.curator</groupId>    <artifactId>curator-recipes</artifactId>    <version>2.9.0</version></dependency>

三、zookeeper基本操作

package zookeeper;import org.apache.curator.framework.CuratorFramework;import org.apache.curator.framework.CuratorFrameworkFactory;import org.apache.curator.retry.ExponentialBackoffRetry;import org.apache.curator.utils.ZKPaths;import org.apache.zookeeper.ZooKeeper;import java.nio.charset.Charset;/** * zookeeper 基本操作<br/> * Created by zhengyong on 16/11/24. */public class ZookeeperCURD {    private static final int        sessionTimeout = 15000;    private static final String     ZK_HOST        = "127.0.0.1:2181";    private static final String     ZK_PATH        = "/zkPath";    private static CuratorFramework curatorClient  = null;    public static void main(String[] args) throws Exception {        createClient();        create(ZK_PATH);        setDataValue(ZK_PATH, "test data");        getDataValue(ZK_PATH);        delete(ZK_PATH);    }    /**     * 创建zookeeper访问客户端     *      * @throws Exception     */    private static void createClient() throws Exception {        if (curatorClient == null) {            synchronized (ZookeeperCURD.class) {                curatorClient = CuratorFrameworkFactory.builder().connectString(ZK_HOST).sessionTimeoutMs(sessionTimeout).retryPolicy(new ExponentialBackoffRetry(1000,                                                                                                                                                                  10,                                                                                                                                                                  5000)).build();                curatorClient.start();            }        }    }    /**     * 创建zookeeper节点信息     *     * @throws Exception     */    private static void create(String path) throws Exception {        ZooKeeper zookeeper = new ZooKeeper(ZK_HOST, sessionTimeout, null);        ZKPaths.mkdirs(zookeeper, path);        System.out.println(String.format("create path=%s", path));    }    /**     * 设置path node 值     *      * @param path 路径     * @param data 值     * @throws Exception     */    private static void setDataValue(String path, String data) throws Exception {        curatorClient.setData().forPath(path, data.getBytes(Charset.forName("UTf-8")));        System.out.println(String.format("set path=%s, data=%s", path, data));    }    /**     * 获取path node 值     *      * @param path 路径     * @return 值     * @throws Exception     */    private static String getDataValue(String path) throws Exception {        byte[] value = curatorClient.getData().forPath(path);        String result = new String(value, Charset.forName("UTf-8"));        System.out.println(String.format("get path=%s, data=%s", path, result));        return result;    }    /**     * 删除节点     *      * @param path 路径     */    private static void delete(String path) throws Exception {        curatorClient.delete().forPath(path);        System.out.println(String.format("delete path=%s", path));    }}

运行结果：

create path=/zkPathset path=/zkPath, data=test dataget path=/zkPath, data=test datadelete path=/zkPath