Working with Java Zookeeper

Working with Java Zookeeper

package cn.sniper.zookeeper;import java.io.ioexception;import java.util.list;import  Java.util.treeset;import org.apache.zookeeper.createmode;import org.apache.zookeeper.keeperexception ;import org.apache.zookeeper.watchedevent;import org.apache.zookeeper.watcher;import  Org.apache.zookeeper.zoodefs;import org.apache.zookeeper.zookeeper;import org.junit.test;public  class ZookeeperUtil {   @Test  public void helloword ()  {   //Port is 2181  //string connectstring =  "192.168.1.231" by default;  string  connectstring =  "192.168.1.231:2181";  int sessiontimeout = 20000;     try {   zookeeper zk = new zookeeper (ConnectString,  sessiontimeout, new watcher ()  {    public void process ( Watchedevent event)  {  &Nbsp;  system.out.println (event);     }   });       system.out.println (ZK);    zk.close ();  } catch  ( ioexception e)  {   e.printstacktrace ();  } catch  ( interruptedexception e)  {   e.printstacktrace ();  } }   @Test  public void create ()  {  String connectString =  " 192.168.1.231:2181 ";   int sessiontimeout = 20000;    try {    zookeeper zk = new zookeeper (connectstring, sessiontimeout,  New watcher ()  {    public void process (WatchedEvent event)  {      system.err.println ("Event Type:"  + event.gettype ());     }   });       //Create Node     zk.create ("/sniper1",  "". GetBytes (),  zoodefs.ids.open_acl_unsafe,  createmode.persistent);       zk.close ();  } catch  ( ioexception e)  {   e.printstacktrace ();  } catch  ( interruptedexception e)  {   e.printstacktrace ();  } catch  ( keeperexception e)  {   e.printstacktrace ();  } }   @Test  public void fifoin ()  {  String connectString =  " 192.168.1.231,192.168.1.232,192.168.1.233 ";  int sessiontimeout = 20000;     try {   zookeeper zk = new zookeeper (connectString,  Sessiontimeout, new watcher ()  {    public void process ( Watchedevent event)  {     system.err. println ("Event Type:"  + event.gettype ());     }   });       //each client is connected in the FIFO to create an ordered node    simulate 10 client connections into    for (int i=0;  i<10; i++)  {    zk.create ("/fifo/",  string.valueof ( System.currenttimemillis ()). GetBytes (),  zoodefs.ids.open_acl_unsafe, createmode.persistent_ sequential);    }      zk.close ();  } catch  ( ioexception e)  {   e.printstacktrace ();  } catch  ( interruptedexception e)  {   e.printstacktrace ();  } catch  ( keeperexception e)  {   e.printstacktrace ();  } }   @Test  public void fifoout ()  {  String connectString =  " 192.168.1.231,192.168.1.232,192.168.1.233 ";   int sessiontimeout = 30000;    try {   zookeeper zk = new  ZooKeeper (Connectstring, sessiontimeout, new watcher ()  {    public  void process (watchedevent event)  {     system.err.println ("Event type: " + event.gettype ());     }   });       list<string> children = zk.getchildren ("/fifo",  new watcher ()  {     public void process (watchedevent event)  {      system.err.println ("Event Type:"  + event.gettype ());     }   });       //because of the order of the node, the node is sorted by TreeSet, the first element can be achieved in the FIFO queue    treeset <String> set = new TreeSet<String> (children);       string child =&nBsp;set.first ();       system.err.println (child);       zk.delete ("/fifo/" +child, -1);       zk.close ();  }  catch  (ioexception e)  {   e.printstacktrace ();  } catch  ( interruptedexception e)  {   e.printstacktrace ();  } catch  ( keeperexception e)  {   e.printstacktrace ();   } } }

Working with Java Zookeeper