How to get started with Curator
This article shows you how to get started with Curator. The content is concise and easy to understand. It will definitely brighten your eyes. I hope you can gain something through the detailed introduction of this article.
Curator is an open source Zookeeper client of Netflix. Compared with the native client provided by Zookeeper, Curator has a higher level of abstraction and simplifies Zookeeper client programming.
Maven dependence
Org.apache.zookeeper zookeeper 3.4.9 org.apache.curator curator-recipes 2.7.0 1. Create Curator connection instance (2 ways) CuratorFramework client = CuratorFrameworkFactory.newClient (address, new ExponentialBackoffRetry (1000, 3)); CuratorFramework client = CuratorFrameworkFactory.builder () .connectString (address) .sessionTimeoutMs (1000) .retryPolicy (retryPolicy) .build ()
Before using CuratorFramework, you must call the
Client.start ()
After completing a series of operations, call client.close (); method, you can use the try-finally statement:
CuratorFramework client = CuratorFrameworkFactory.newClient (address, new ExponentialBackoffRetry (1000, 3)); try {client.start ();...} finally {if (clientproof null) client.close ();} 2. Create a nod
a. Create a permanent node
Client.create () .creatingParentContainers IfNeutral () .withMode (CreateMode.PERSISTENT) .withACL (ZooDefs.Ids.OPEN_ACL_UNSAFE) .forPath (path, "hello, zk" .getBytes ())
b. Create a temporary node
Client.create () .withMode (CreateMode.EPHEMERAL) .forPath (path, "hello" .getBytes ()); 3. Get the node value byte [] buf = client.getData (). ForPath (path); System.out.println ("get data path:" + path+ ", data:" + new String (buf)); 4. Set the node value client.setData (). InBackground (). ForPath (path, "ricky" .getBytes ()); 5.checkExistsStat stat= client.checkExists (). ForPath (path); if (stat==null) {System.out.println ("exec create path:" + path);} else {System.out.println ("exec getData");} 6. Delete the node client.delete (). DeletingChildrenIfNeeded (). ForPath ("/ pandora"); the above is how to get started with Curator. Have you learned any knowledge or skills? If you want to learn more skills or enrich your knowledge reserve, you are welcome to follow the industry information channel.
