curator操做zookeeper案例
Apache Curator客户端的使用
curator与客户端的异同
zk原生api的不足之处
watch注册一次后就会失效
不支持递归创建节点
会话连接、命名空间和节点创建，递归创建，递归删除
package com.imooc.curator;
import java.util.List;
import org.apache.curator.RetryPolicy;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.recipes.cache.ChildData;
import org.apache.curator.framework.recipes.cache.PathChildrenCache;
import org.apache.curator.framework.recipes.cache.PathChildrenCache.StartMode;
import org.apache.curator.framework.recipes.cache.PathChildrenCacheEvent;
import org.apache.curator.framework.recipes.cache.PathChildrenCacheListener;
import org.apache.curator.retry.RetryNTimes;
public class CuratorOperator {
public CuratorFramework client = null;
public static final String zkServerPath = "192.168.1.110:2181";
/**
* 实例化zk客户端
*/
public CuratorOperator() {
/**
* 同步创建zk示例，原生api是异步的
*
* curator链接zookeeper的策略:ExponentialBackoffRetry
* baseSleepTimeMs：初始sleep的时间
* maxRetries：最大重试次数
* maxSleepMs：最大重试时间
*/
// RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 5);
/**
* curator链接zookeeper的策略:RetryNTimes
* n：重试的次数
* sleepMsBetweenRetries：每次重试间隔的时间
*/
RetryPolicy retryPolicy = new RetryNTimes(3, 5000);
/**
* curator链接zookeeper的策略:RetryOneTime
* sleepMsBetweenRetry:每次重试间隔的时间
*/
// RetryPolicy retryPolicy2 = new RetryOneTime(3000);
/**
* 永远重试，不推荐使用
*/
// RetryPolicy retryPolicy3 = new RetryForever(retryIntervalMs)
/**
* curator链接zookeeper的策略:RetryUntilElapsed
* maxElapsedTimeMs:最大重试时间
* sleepMsBetweenRetries:每次重试间隔
* 重试时间超过maxElapsedTimeMs后，就不再重试
*/
// RetryPolicy retryPolicy4 = new RetryUntilElapsed(2000, 3000);
client = CuratorFrameworkFactory.builder()
.connectString(zkServerPath)
.sessionTimeoutMs(10000).retryPolicy(retryPolicy)
.namespace("workspace").build();
client.start();
}
/**
*
* @Description: 关闭zk客户端连接
*/
public void closeZKClient() {
if (client != null) {
this.client.close();
}
}
public static void main(String[] args) throws Exception {
// 实例化
CuratorOperator cto = new CuratorOperator();
boolean isZkCuratorStarted = cto.client.isStarted();
System.out.println("当前客户的状态：" + (isZkCuratorStarted ? "连接中" : "已关闭"));
// 创建节点
String nodePath = "/super/imooc";
// byte[] data = "superme".getBytes();
// cto.client.create().creatingParentsIfNeeded()
// .withMode(CreateMode.PERSISTENT)
// .withACL(Ids.OPEN_ACL_UNSAFE)
// .forPath(nodePath, data);
// 更新节点数据
// byte[] newData = "batman".getBytes();
// cto.client.setData().withVersion(0).forPath(nodePath, newData);
// 删除节点
// cto.client.delete()
// .guaranteed() // 如果删除失败，那么在后端还是继续会删除，直到成功
// .deletingChildrenIfNeeded() // 如果有子节点，就删除
// .withVersion(0)
// .forPath(nodePath);
// 读取节点数据
// Stat stat = new Stat();
// byte[] data = cto.client.getData().storingStatIn(stat).forPath(nodePath);
// System.out.println("节点" + nodePath + "的数据为: " + new String(data));
// System.out.println("该节点的版本号为: " + stat.getVersion());
// 查询子节点
// List<String> childNodes = cto.client.getChildren()
// .forPath(nodePath);
// System.out.println("开始打印子节点：");
// for (String s : childNodes) {
// System.out.println(s);
// }
// 判断节点是否存在,如果不存在则为空
// Stat statExist = cto.client.checkExists().forPath(nodePath + "/abc");
// System.out.println(statExist);
// watcher 事件 当使用usingWatcher的时候，监听只会触发一次，监听完毕后就销毁
// cto.client.getData().usingWatcher(new MyCuratorWatcher()).forPath(nodePath);
// cto.client.getData().usingWatcher(new MyWatcher()).forPath(nodePath);
// 为节点添加watcher，监听n次
// NodeCache: 监听数据节点的变更，会触发事件
// final NodeCache nodeCache = new NodeCache(cto.client, nodePath);
// // buildInitial : 初始化的时候获取node的值并且缓存
// nodeCache.start(true);
// if (nodeCache.getCurrentData() != null) {
// System.out.println("节点初始化数据为：" + new String(nodeCache.getCurrentData().getData()));
// } else {
// System.out.println("节点初始化数据为空...");
// }
// nodeCache.getListenable().addListener(new NodeCacheListener() {
// public void nodeChanged() throws Exception {
// if (nodeCache.getCurrentData() == null) {
// System.out.println("空");
// return;
// }
// String data = new String(nodeCache.getCurrentData().getData());
// System.out.println("节点路径：" + nodeCache.getCurrentData().getPath() + "数据：" + data);
// }
// });
// 为子节点添加watcher
// PathChildrenCache: 监听数据节点的增删改，会触发事件
String childNodePathCache = nodePath;
// cacheData: 设置缓存节点的数据状态
final PathChildrenCache childrenCache = new PathChildrenCache(cto.client, childNodePathCache, true);
/**
* StartMode: 初始化方式
* POST_INITIALIZED_EVENT：异步初始化，初始化之后会触发事件
* NORMAL：异步初始化
* BUILD_INITIAL_CACHE：同步初始化
*/
childrenCache.start(StartMode.POST_INITIALIZED_EVENT);
List<ChildData> childDataList = childrenCache.getCurrentData();
System.out.println("当前数据节点的子节点数据列表：");
for (ChildData cd : childDataList) {
String childData = new String(cd.getData());
System.out.println(childData);
}
childrenCache.getListenable().addListener(new PathChildrenCacheListener() {
public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception {
if(event.getType().equals(PathChildrenCacheEvent.Type.INITIALIZED)){
System.out.println("子节点初始化ok...");
}
else if(event.getType().equals(PathChildrenCacheEvent.Type.CHILD_ADDED)){
String path = event.getData().getPath();
if (path.equals(ADD_PATH)) {
System.out.println("添加子节点:" + event.getData().getPath());
System.out.println("子节点数据:" + new String(event.getData().getData()));
} else if (path.equals("/super/imooc/e")) {
System.out.println("添加不正确...");
}
}else if(event.getType().equals(PathChildrenCacheEvent.Type.CHILD_REMOVED)){
System.out.println("删除子节点:" + event.getData().getPath());
}else if(event.getType().equals(PathChildrenCacheEvent.Type.CHILD_UPDATED)){
System.out.println("修改子节点路径:" + event.getData().getPath());
System.out.println("修改子节点数据:" + new String(event.getData().getData()));
}
}
});
Thread.sleep(100000);
cto.closeZKClient();
boolean isZkCuratorStarted2 = cto.client.isStarted();
System.out.println("当前客户的状态：" + (isZkCuratorStarted2 ? "连接中" : "已关闭"));
}
public final static String ADD_PATH = "/super/imooc/d";
}
package com.imooc.curator;
import org.apache.curator.framework.api.CuratorWatcher;
import org.apache.zookeeper.WatchedEvent;
public class MyCuratorWatcher implements CuratorWatcher {
@Override
public void process(WatchedEvent event) throws Exception {
System.out.println("触发watcher，节点路径为：" + event.getPath());
}
}
package com.imooc.curator;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
public class MyWatcher implements Watcher {
@Override
public void process(WatchedEvent event) {
System.out.println("触发watcher，节点路径为：" + event.getPath());
}
}
watch统一更新n台节点
package com.imooc.curator.checkConfig;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import org.apache.commons.lang3.StringUtils;
import org.apache.curator.RetryPolicy;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.recipes.cache.ChildData;
import org.apache.curator.framework.recipes.cache.NodeCache;
import org.apache.curator.framework.recipes.cache.PathChildrenCache;
import org.apache.curator.framework.recipes.cache.PathChildrenCacheEvent;
import org.apache.curator.framework.recipes.cache.PathChildrenCacheListener;
import org.apache.curator.framework.recipes.cache.PathChildrenCache.StartMode;
import org.apache.curator.retry.RetryNTimes;
import com.imooc.utils.JsonUtils;
import com.imooc.utils.RedisConfig;
public class Client1 {
public CuratorFramework client = null;
public static final String zkServerPath = "192.168.1.110:2181";
public Client1() {
RetryPolicy retryPolicy = new RetryNTimes(3, 5000);
client = CuratorFrameworkFactory.builder()
.connectString(zkServerPath)
.sessionTimeoutMs(10000).retryPolicy(retryPolicy)
.namespace("workspace").build();
client.start();
}
public void closeZKClient() {
if (client != null) {
this.client.close();
}
}
// public final static String CONFIG_NODE = "/super/imooc/redis-config";
public final static String CONFIG_NODE_PATH = "/super/imooc";
public final static String SUB_PATH = "/redis-config";
public static CountDownLatch countDown = new CountDownLatch(1);
public static void main(String[] args) throws Exception {
Client1 cto = new Client1();
System.out.println("client1 启动成功...");
final PathChildrenCache childrenCache = new PathChildrenCache(cto.client, CONFIG_NODE_PATH, true);
childrenCache.start(StartMode.BUILD_INITIAL_CACHE);
// 添加监听事件
childrenCache.getListenable().addListener(new PathChildrenCacheListener() {
public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception {
// 监听节点变化
if(event.getType().equals(PathChildrenCacheEvent.Type.CHILD_UPDATED)){
String configNodePath = event.getData().getPath();
if (configNodePath.equals(CONFIG_NODE_PATH + SUB_PATH)) {
System.out.println("监听到配置发生变化，节点路径为:" + configNodePath);
// 读取节点数据
String jsonConfig = new String(event.getData().getData());
System.out.println("节点" + CONFIG_NODE_PATH + "的数据为: " + jsonConfig);
// 从json转换配置
RedisConfig redisConfig = null;
if (StringUtils.isNotBlank(jsonConfig)) {
redisConfig = JsonUtils.jsonToPojo(jsonConfig, RedisConfig.class);
}
// 配置不为空则进行相应操作
if (redisConfig != null) {
String type = redisConfig.getType();
String url = redisConfig.getUrl();
String remark = redisConfig.getRemark();
// 判断事件
if (type.equals("add")) {
System.out.println("监听到新增的配置，准备下载...");
// ... 连接ftp服务器，根据url找到相应的配置
Thread.sleep(500);
System.out.println("开始下载新的配置文件，下载路径为<" + url + ">");
// ... 下载配置到你指定的目录
Thread.sleep(1000);
System.out.println("下载成功，已经添加到项目中");
// ... 拷贝文件到项目目录
} else if (type.equals("update")) {
System.out.println("监听到更新的配置，准备下载...");
// ... 连接ftp服务器，根据url找到相应的配置
Thread.sleep(500);
System.out.println("开始下载配置文件，下载路径为<" + url + ">");
// ... 下载配置到你指定的目录
Thread.sleep(1000);
System.out.println("下载成功...");
System.out.println("删除项目中原配置文件...");
Thread.sleep(100);
// ... 删除原文件
System.out.println("拷贝配置文件到项目目录...");
// ... 拷贝文件到项目目录
} else if (type.equals("delete")) {
System.out.println("监听到需要删除配置");
System.out.println("删除项目中原配置文件...");
}
// TODO 视情况统一重启服务
}
}
}
}
});
countDown.await();
cto.closeZKClient();
}
}
package com.imooc.curator.checkConfig;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import org.apache.commons.lang3.StringUtils;
import org.apache.curator.RetryPolicy;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.recipes.cache.ChildData;
import org.apache.curator.framework.recipes.cache.NodeCache;
import org.apache.curator.framework.recipes.cache.PathChildrenCache;
import org.apache.curator.framework.recipes.cache.PathChildrenCacheEvent;
import org.apache.curator.framework.recipes.cache.PathChildrenCacheListener;
import org.apache.curator.framework.recipes.cache.PathChildrenCache.StartMode;
import org.apache.curator.retry.RetryNTimes;
import com.imooc.utils.JsonUtils;
import com.imooc.utils.RedisConfig;
public class Client2 {
public CuratorFramework client = null;
public static final String zkServerPath = "192.168.1.110:2181";
public Client2() {
RetryPolicy retryPolicy = new RetryNTimes(3, 5000);
client = CuratorFrameworkFactory.builder()
.connectString(zkServerPath)
.sessionTimeoutMs(10000).retryPolicy(retryPolicy)
.namespace("workspace").build();
client.start();
}
public void closeZKClient() {
if (client != null) {
this.client.close();
}
}
// public final static String CONFIG_NODE = "/super/imooc/redis-config";
public final static String CONFIG_NODE_PATH = "/super/imooc";
public final static String SUB_PATH = "/redis-config";
public static CountDownLatch countDown = new CountDownLatch(1);
public static void main(String[] args) throws Exception {
Client2 cto = new Client2();
System.out.println("client2 启动成功...");
final PathChildrenCache childrenCache = new PathChildrenCache(cto.client, CONFIG_NODE_PATH, true);
childrenCache.start(StartMode.BUILD_INITIAL_CACHE);
// 添加监听事件
childrenCache.getListenable().addListener(new PathChildrenCacheListener() {
public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception {
// 监听节点变化
if(event.getType().equals(PathChildrenCacheEvent.Type.CHILD_UPDATED)){
String configNodePath = event.getData().getPath();
if (configNodePath.equals(CONFIG_NODE_PATH + SUB_PATH)) {
System.out.println("监听到配置发生变化，节点路径为:" + configNodePath);
// 读取节点数据
String jsonConfig = new String(event.getData().getData());
System.out.println("节点" + CONFIG_NODE_PATH + "的数据为: " + jsonConfig);
// 从json转换配置
RedisConfig redisConfig = null;
if (StringUtils.isNotBlank(jsonConfig)) {
redisConfig = JsonUtils.jsonToPojo(jsonConfig, RedisConfig.class);
}
// 配置不为空则进行相应操作
if (redisConfig != null) {
String type = redisConfig.getType();
String url = redisConfig.getUrl();
String remark = redisConfig.getRemark();
// 判断事件
if (type.equals("add")) {
System.out.println("监听到新增的配置，准备下载...");
// ... 连接ftp服务器，根据url找到相应的配置
Thread.sleep(500);
System.out.println("开始下载新的配置文件，下载路径为<" + url + ">");
// ... 下载配置到你指定的目录
Thread.sleep(1000);
System.out.println("下载成功，已经添加到项目中");
// ... 拷贝文件到项目目录
} else if (type.equals("update")) {
System.out.println("监听到更新的配置，准备下载...");
// ... 连接ftp服务器，根据url找到相应的配置
Thread.sleep(500);
System.out.println("开始下载配置文件，下载路径为<" + url + ">");
// ... 下载配置到你指定的目录
Thread.sleep(1000);
System.out.println("下载成功...");
System.out.println("删除项目中原配置文件...");
Thread.sleep(100);
// ... 删除原文件
System.out.println("拷贝配置文件到项目目录...");
// ... 拷贝文件到项目目录
} else if (type.equals("delete")) {
System.out.println("监听到需要删除配置");
System.out.println("删除项目中原配置文件...");
}
// TODO 视情况统一重启服务
}
}
}
}
});
countDown.await();
cto.closeZKClient();
}
}
package com.imooc.curator.checkConfig;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import org.apache.commons.lang3.StringUtils;
import org.apache.curator.RetryPolicy;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.recipes.cache.ChildData;
import org.apache.curator.framework.recipes.cache.NodeCache;
import org.apache.curator.framework.recipes.cache.PathChildrenCache;
import org.apache.curator.framework.recipes.cache.PathChildrenCacheEvent;
import org.apache.curator.framework.recipes.cache.PathChildrenCacheListener;
import org.apache.curator.framework.recipes.cache.PathChildrenCache.StartMode;
import org.apache.curator.retry.RetryNTimes;
import com.imooc.utils.JsonUtils;
import com.imooc.utils.RedisConfig;
public class Client3 {
public CuratorFramework client = null;
public static final String zkServerPath = "192.168.1.110:2181";
public Client3() {
RetryPolicy retryPolicy = new RetryNTimes(3, 5000);
client = CuratorFrameworkFactory.builder()
.connectString(zkServerPath)
.sessionTimeoutMs(10000).retryPolicy(retryPolicy)
.namespace("workspace").build();
client.start();
}
public void closeZKClient() {
if (client != null) {
this.client.close();
}
}
// public final static String CONFIG_NODE = "/super/imooc/redis-config";
public final static String CONFIG_NODE_PATH = "/super/imooc";
public final static String SUB_PATH = "/redis-config";
public static CountDownLatch countDown = new CountDownLatch(1);
public static void main(String[] args) throws Exception {
Client3 cto = new Client3();
System.out.println("client3 启动成功...");
final PathChildrenCache childrenCache = new PathChildrenCache(cto.client, CONFIG_NODE_PATH, true);
childrenCache.start(StartMode.BUILD_INITIAL_CACHE);
// 添加监听事件
childrenCache.getListenable().addListener(new PathChildrenCacheListener() {
public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception {
// 监听节点变化
if(event.getType().equals(PathChildrenCacheEvent.Type.CHILD_UPDATED)){
String configNodePath = event.getData().getPath();
if (configNodePath.equals(CONFIG_NODE_PATH + SUB_PATH)) {
System.out.println("监听到配置发生变化，节点路径为:" + configNodePath);
// 读取节点数据
String jsonConfig = new String(event.getData().getData());
System.out.println("节点" + CONFIG_NODE_PATH + "的数据为: " + jsonConfig);
// 从json转换配置
RedisConfig redisConfig = null;
if (StringUtils.isNotBlank(jsonConfig)) {
redisConfig = JsonUtils.jsonToPojo(jsonConfig, RedisConfig.class);
}
// 配置不为空则进行相应操作
if (redisConfig != null) {
String type = redisConfig.getType();
String url = redisConfig.getUrl();
String remark = redisConfig.getRemark();
// 判断事件
if (type.equals("add")) {
System.out.println("监听到新增的配置，准备下载...");
// ... 连接ftp服务器，根据url找到相应的配置
Thread.sleep(500);
System.out.println("开始下载新的配置文件，下载路径为<" + url + ">");
// ... 下载配置到你指定的目录
Thread.sleep(1000);
System.out.println("下载成功，已经添加到项目中");
// ... 拷贝文件到项目目录
} else if (type.equals("update")) {
System.out.println("监听到更新的配置，准备下载...");
// ... 连接ftp服务器，根据url找到相应的配置
Thread.sleep(500);
System.out.println("开始下载配置文件，下载路径为<" + url + ">");
// ... 下载配置到你指定的目录
Thread.sleep(1000);
System.out.println("下载成功...");
System.out.println("删除项目中原配置文件...");
Thread.sleep(100);
// ... 删除原文件
System.out.println("拷贝配置文件到项目目录...");
// ... 拷贝文件到项目目录
} else if (type.equals("delete")) {
System.out.println("监听到需要删除配置");
System.out.println("删除项目中原配置文件...");
}
// TODO 视情况统一重启服务
}
}
}
}
});
countDown.await();
cto.closeZKClient();
}
}
package com.imooc.utils;
public class RedisConfig {
private String type; // add 新增配置 update 更新配置 delete 删除配置
private String url; // 如果是add或update，则提供下载地址
private String remark; // 备注
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public String getRemark() {
return remark;
}
public void setRemark(String remark) {
this.remark = remark;
}
}
package com.imooc.utils;
import java.util.List;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
/**
*
* @Title: JsonUtils.java
* @Package com.lee.utils
* @Description: JSON/对象转换类
* Copyright: Copyright (c) 2016
* Company:Nathan.Lee.Salvatore
*
* @author leechenxiang
* @date 2016年4月29日 下午11:05:03
* @version V1.0
*/
public class JsonUtils {
// 定义jackson对象
private static final ObjectMapper MAPPER = new ObjectMapper();
/**
* 将对象转换成json字符串。
* <p>Title: pojoToJson</p>
* <p>Description: </p>
* @param data
* @return
*/
public static String objectToJson(Object data) {
try {
String string = MAPPER.writeValueAsString(data);
return string;
} catch (JsonProcessingException e) {
e.printStackTrace();
}
return null;
}
/**
* 将json结果集转化为对象
*
* @param jsonData json数据
* @param clazz 对象中的object类型
* @return
*/
public static <T> T jsonToPojo(String jsonData, Class<T> beanType) {
try {
T t = MAPPER.readValue(jsonData, beanType);
return t;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 将json数据转换成pojo对象list
* <p>Title: jsonToList</p>
* <p>Description: </p>
* @param jsonData
* @param beanType
* @return
*/
public static <T>List<T> jsonToList(String jsonData, Class<T> beanType) {
JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType);
try {
List<T> list = MAPPER.readValue(jsonData, javaType);
return list;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
curator的acl权限与认证授权
递归创建acl
package com.imooc.curator;
import java.util.ArrayList;
import java.util.List;
import org.apache.curator.RetryPolicy;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.retry.RetryNTimes;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.ZooDefs.Ids;
import org.apache.zookeeper.ZooDefs.Perms;
import org.apache.zookeeper.data.ACL;
import org.apache.zookeeper.data.Id;
import com.imooc.utils.AclUtils;
public class CuratorAcl {
public CuratorFramework client = null;
public static final String zkServerPath = "192.168.1.110:2181";
public CuratorAcl() {
RetryPolicy retryPolicy = new RetryNTimes(3, 5000);
client = CuratorFrameworkFactory.builder().authorization("digest", "imooc1:123456".getBytes())
.connectString(zkServerPath)
.sessionTimeoutMs(10000).retryPolicy(retryPolicy)
.namespace("workspace").build();
client.start();
}
public void closeZKClient() {
if (client != null) {
this.client.close();
}
}
public static void main(String[] args) throws Exception {
// 实例化
CuratorAcl cto = new CuratorAcl();
boolean isZkCuratorStarted = cto.client.isStarted();
System.out.println("当前客户的状态：" + (isZkCuratorStarted ? "连接中" : "已关闭"));
String nodePath = "/acl/father/child/sub";
List<ACL> acls = new ArrayList<ACL>();
Id imooc1 = new Id("digest", AclUtils.getDigestUserPwd("imooc1:123456"));
Id imooc2 = new Id("digest", AclUtils.getDigestUserPwd("imooc2:123456"));
acls.add(new ACL(Perms.ALL, imooc1));
acls.add(new ACL(Perms.READ, imooc2));
acls.add(new ACL(Perms.DELETE | Perms.CREATE, imooc2));
// 创建节点
// byte[] data = "spiderman".getBytes();
// cto.client.create().creatingParentsIfNeeded()
// .withMode(CreateMode.PERSISTENT)
// .withACL(acls, true)
// .forPath(nodePath, data);
cto.client.setACL().withACL(acls).forPath("/curatorNode");
// 更新节点数据
// byte[] newData = "batman".getBytes();
// cto.client.setData().withVersion(0).forPath(nodePath, newData);
// 删除节点
// cto.client.delete().guaranteed().deletingChildrenIfNeeded().withVersion(0).forPath(nodePath);
// 读取节点数据
// Stat stat = new Stat();
// byte[] data = cto.client.getData().storingStatIn(stat).forPath(nodePath);
// System.out.println("节点" + nodePath + "的数据为: " + new String(data));
// System.out.println("该节点的版本号为: " + stat.getVersion());
cto.closeZKClient();
boolean isZkCuratorStarted2 = cto.client.isStarted();
System.out.println("当前客户的状态：" + (isZkCuratorStarted2 ? "连接中" : "已关闭"));
}
}
package com.imooc.utils;
import java.io.IOException;
import java.security.NoSuchAlgorithmException;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.server.auth.DigestAuthenticationProvider;
public class AclUtils {
public static String getDigestUserPwd(String id) {
String digest = "";
try {
digest = DigestAuthenticationProvider.generateDigest(id);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return digest;
}
public static void main(String[] args) throws IOException, InterruptedException, KeeperException, Exception {
String id = "imooc:imooc";
String idDigested = getDigestUserPwd(id);
System.out.println(idDigested);
}
}
