zkClient操作
根本增删改查代码如下
public class createSession { public static void main(String[] args) { ZkClient zkClient = new ZkClient("119.45.52.68:2181"); System.out.println("connect success"); }}public class CreateNode { public static void main(String[] args) { ZkClient zkClient = new ZkClient("119.45.52.68:2181"); System.out.println("connect success"); //true代表能够递归创立目录 zkClient.createPersistent("/zkclient/persistent/children",true); System.out.println("create node success"); }}public class DeleteNode { public static void main(String[] args) { ZkClient zkClient = new ZkClient("119.45.52.68:2181"); zkClient.deleteRecursive("/zkclient"); System.out.println("success delete node"); }}public class GetChildrenChanged { public static void main(String[] args) throws Exception{ ZkClient zkClient = new ZkClient("119.45.52.68:2181"); zkClient.createPersistent("/zkClient"); Thread.sleep(1000); List<String> children = zkClient.getChildren("/zkClient"); System.out.println(children); zkClient.subscribeChildChanges("/zkClient", new IZkChildListener() { @Override public void handleChildChange(String parentPath, List<String> currentChilds) throws Exception { System.out.println("父门路"+parentPath+"以后子门路的"+currentChilds); } }); zkClient.createPersistent("/zkClient/child1"); Thread.sleep(1000); zkClient.delete("/zkClient/child1"); Thread.sleep(Integer.MAX_VALUE); }}public class GetNodeData { public static void main(String[] args) throws Exception{ String path = "/zkclient-node"; ZkClient zkClient = new ZkClient("119.45.52.68:2181"); boolean exist = zkClient.exists(path); if (!exist){ zkClient.createEphemeral(path,"123"); } zkClient.subscribeDataChanges(path, new IZkDataListener() { @Override public void handleDataChange(String dataPath, Object data) throws Exception { System.out.println(dataPath+"节点内容被更新"+data); } @Override public void handleDataDeleted(String dataPath) throws Exception { System.out.println(dataPath+"节点内容被删除"); } }); Object o = zkClient.readData(path); System.out.println(o); zkClient.writeData(path,"4567"); Thread.sleep(2000); zkClient.delete(path); Thread.sleep(2000); }}curator操作api应用
public class CreateSession { public static void main(String[] args) { //curator第一种创立回话形式 RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000,3); CuratorFramework curatorFramework = CuratorFrameworkFactory.newClient("119.45.52.68:2181", 5000,3000,retryPolicy); curatorFramework.start(); System.out.println("create session success"); //第二种形式 CuratorFramework client =CuratorFrameworkFactory.builder() .connectString("119.45.52.68:2181") .sessionTimeoutMs(5000) .sessionTimeoutMs(3000) .retryPolicy(retryPolicy) .namespace("base") .build(); client.start(); System.out.println("createe session2 success "); }}public class CreateNode { public static void main(String[] args) throws Exception{ RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000,3); CuratorFramework client = CuratorFrameworkFactory.builder() .connectString("119.45.52.68:2181") .sessionTimeoutMs(5000) .sessionTimeoutMs(3000) .retryPolicy(retryPolicy) //.namespace("base") .build(); client.start(); String path = "/curator/child1"; client.create().creatingParentContainersIfNeeded() .withMode(CreateMode.PERSISTENT) .forPath(path,"init".getBytes()); System.out.println("success create node"); }}public class DeleteNode { public static void main(String[] args) throws Exception{ RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000,3); CuratorFramework client = CuratorFrameworkFactory.builder() .connectString("119.45.52.68:2181") .sessionTimeoutMs(5000) .sessionTimeoutMs(3000) .retryPolicy(retryPolicy) //.namespace("base") .build(); client.start(); String path = "/curator"; client.delete().deletingChildrenIfNeeded().withVersion(-1).forPath(path); System.out.println("delete node success "); }}public class GetNodeData { public static void main(String[] args) throws Exception{ RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000,3); CuratorFramework client = CuratorFrameworkFactory.builder() .connectString("119.45.52.68:2181") .sessionTimeoutMs(5000) .sessionTimeoutMs(3000) .retryPolicy(retryPolicy) //.namespace("base") .build(); client.start(); String path = "/curator/child1"; client.create().creatingParentContainersIfNeeded() .withMode(CreateMode.PERSISTENT) .forPath(path,"init".getBytes()); System.out.println("success create node"); Stat stat = new Stat(); byte [] data = client.getData().storingStatIn(stat).forPath(path); System.out.println("数据为"+new String(data)); }}public class UpdateNodeData { public static void main(String[] args) throws Exception{ RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000,3); CuratorFramework client = CuratorFrameworkFactory.builder() .connectString("119.45.52.68:2181") .sessionTimeoutMs(5000) .sessionTimeoutMs(3000) .retryPolicy(retryPolicy) //.namespace("base") .build(); client.start(); String path = "/curator/child1";// client.create().creatingParentContainersIfNeeded()// .withMode(CreateMode.PERSISTENT)// .forPath(path,"init".getBytes());// System.out.println("success create node"); Stat stat = new Stat(); byte [] data = client.getData().storingStatIn(stat).forPath(path); System.out.println("数据为"+new String(data)); int version = client.setData().withVersion(stat.getVersion()).forPath(path).getVersion(); System.out.println("update node "+path+" version "+version); client.setData().withVersion(stat.getVersion()).forPath(path).getAversion(); }}最初一行代码会报错，起因是不能设置同样的数据版本。
除了上述的两种zkclient和curatir的罕用操作。还有一些其余操作都能够去尝试
代码的地址为https://github.com/zhendiao/deme-code/tree/main/zk
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