The curator framework determines whether the zookeeper node is a temporary node or a persisted node __zookeeper

Curator Framework client use, please see a blog "Zookeeper client curator framework use".

The Curatorframework class has an interface that determines whether a node exists checkexists (), which returns a Org.apache.zookeeper.data.Stat object that has a Ephemeralowner attribute in the object.

If the node is a persisted node, the value of Ephemeralowner is 0 if the node is a temporary node, the value of Ephemeralowner is greater than 0

Example, there is now a persistent node (/chijiu) and a temporary node (/linshi) on the zookeeper.

1. Get persistent node (/CHIJIU) node Stat object

2. Get temporary node (/linshi) Node Stat object

The complete code is as follows:

Introducing Jar Packs

Test code

Import Org.apache.curator.RetryPolicy;
Import Org.apache.curator.framework.CuratorFramework;
Import Org.apache.curator.framework.CuratorFrameworkFactory;
Import Org.apache.curator.retry.ExponentialBackoffRetry;
Import Org.apache.zookeeper.CreateMode;

Import Org.apache.zookeeper.data.Stat;
 /** * Created by Wzj on 2018/5/3. */public class Zktest {public static void main (string[] args) throws Exception {Retrypolicy retrypolic

        y = new Exponentialbackoffretry (1000, 3);

        Curatorframework client = curatorframeworkfactory.newclient ("192.168.3.45:2181", Retrypolicy);


        Client.start ();
        Cratenode (client, "/linshi", Createmode.ephemeral, "");

        Cratenode (client, "/chijiu", Createmode.persistent, "");

        SYSTEM.OUT.PRINTLN (Getnodetype (client, "/linshi"));
    SYSTEM.OUT.PRINTLN (Getnodetype (client, "/chijiu")); /** * Create node * @param client clients * @param path PATH * @param createmode node type * @param da       TaNode Data * @return Whether to create success/public static Boolean Cratenode (curatorframework client,string path, Createmode CRE Atemode, String data) {try {client.create (). Withmode (Createmode). Forpath (Path, DATA.GETB
        Ytes ());
            catch (Exception e) {e.printstacktrace ();
        return false;
    return true; /** * To determine if the node is a persistent node * @param client clients * @param path PATH * @return null-node does not exist | createmode.persistent-is Persistent |
        createmode.ephemeral-Temporary node */public static Createmode Getnodetype (curatorframework client,string path) {

            try {Stat Stat = client.checkexists (). Forpath (path);
            if (stat = = null) {return null;
            } if (Stat.getephemeralowner () > 0) {return createmode.ephemeral;
        return createmode.persistent;
    }    catch (Exception e) {e.printstacktrace ();
        return null; }
    }

}