下面是简单的java对zookeeper的操作
package com.yydone.zookeeper;
import java.io.IOException;
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.Ids;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.data.Stat;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Test {
private static final int SESSION_TIMEOUT = 30000;
public static final Logger logger = LoggerFactory.getLogger(Test.class);
private Watcher watcher = new Watcher() {
@Override
public void process(WatchedEvent event) {
logger.info("process:"+event.getType());
}
};
private ZooKeeper zooKeeper;
public ZooKeeper getZooKeeper() {
return zooKeeper;
}
public void setZooKeeper(ZooKeeper zooKeeper) {
this.zooKeeper = zooKeeper;
}
public void connect() throws IOException {
zooKeeper = new ZooKeeper("192.168.1.102:2181",SESSION_TIMEOUT, watcher);
}
public void close() {
try {
zooKeeper.close();
} catch (InterruptedException e) {
logger.error("关闭发生异常",e);
}
}
public static void main(String[] args) throws IOException, KeeperException, InterruptedException {
Test test = new Test();
//连接
test.connect();
logger.info("连接成功");
//创建
String result = test.getZooKeeper().create("/test001", "test001data".getBytes(), Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
logger.info("创建成功:"+result);
//判断是否存在
Stat stat = test.getZooKeeper().exists("/test001", false);
logger.info("exists:",stat.getCzxid());
if(stat!=null) {
result = new String(test.getZooKeeper().getData("/test001", null, null));
logger.info("获取："+result);
}
stat = test.getZooKeeper().setData("/test001", "test1001,ceshi".getBytes(), -1);
result = new String(test.getZooKeeper().getData("/test001", null, null));
logger.info("获取："+result);
test.getZooKeeper().delete("/test001", -1);
}
}
运行结果如下：
2014-05-13 23:54:45,673 0 [main] INFO [Environment.java:100] - Client environment:zookeeper.version=3.4.6-1569965, built on 02/20/2014 09:09 GMT 2014-05-13 23:54:45,676 3 [main] INFO [Environment.java:100] - Client environment:host.name=yunix-PC 2014-05-13 23:54:45,676 3 [main] INFO [Environment.java:100] - Client environment:java.version=1.8.0_05 2014-05-13 23:54:45,676 3 [main] INFO [Environment.java:100] - Client environment:java.vendor=Oracle Corporation 2014-05-13 23:54:45,679 6 [main] INFO [Environment.java:100] - Client environment:java.home=D:\Java\jre8 2014-05-13 23:54:45,679 6 [main] INFO [Environment.java:100] - Client environment:java.class.path=F:\workspace\yunix-zookeeper\bin;C:\Users\yunix\Desktop\zookeeper-3.4.6\zookeeper-3.4.6.jar;C:\Users\yunix\Desktop\zookeeper-3.4.6\lib\jline-0.9.94.jar;C:\Users\yunix\Desktop\zookeeper-3.4.6\lib\log4j-1.2.16.jar;C:\Users\yunix\Desktop\zookeeper-3.4.6\lib\netty-3.7.0.Final.jar;C:\Users\yunix\Desktop\zookeeper-3.4.6\lib\slf4j-api-1.6.1.jar;C:\Users\yunix\Desktop\zookeeper-3.4.6\lib\slf4j-log4j12-1.6.1.jar 2014-05-13 23:54:45,679 6 [main] INFO [Environment.java:100] - Client environment:java.library.path=D:\Java\jre8\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static;. 2014-05-13 23:54:45,680 7 [main] INFO [Environment.java:100] - Client environment:java.io.tmpdir=C:\Users\yunix\AppData\Local\Temp\ 2014-05-13 23:54:45,680 7 [main] INFO [Environment.java:100] - Client environment:java.compiler=2014-05-13 23:54:45,680 7 [main] INFO [Environment.java:100] - Client environment:os.name=Windows 7 2014-05-13 23:54:45,680 7 [main] INFO [Environment.java:100] - Client environment:os.arch=amd64 2014-05-13 23:54:45,680 7 [main] INFO [Environment.java:100] - Client environment:os.version=6.1 2014-05-13 23:54:45,680 7 [main] INFO [Environment.java:100] - Client environment:user.name=yunix 2014-05-13 23:54:45,680 7 [main] INFO [Environment.java:100] - Client environment:user.home=C:\Users\yunix 2014-05-13 23:54:45,680 7 [main] INFO [Environment.java:100] - Client environment:user.dir=F:\workspace\yunix-zookeeper 2014-05-13 23:54:45,681 8 [main] INFO [ZooKeeper.java:438] - Initiating client connection, connectString=192.168.1.102:2181 sessionTimeout=30000 watcher=com.yydone.zookeeper.Test$1@5910e440 2014-05-13 23:54:45,734 61 [main] INFO [Test.java:54] - 连接成功 2014-05-13 23:54:45,746 73 [main-SendThread(192.168.1.102:2181)] INFO [ClientCnxn.java:975] - Opening socket connection to server 192.168.1.102/192.168.1.102:2181. Will not attempt to authenticate using SASL (unknown error) 2014-05-13 23:54:45,750 77 [main-SendThread(192.168.1.102:2181)] INFO [ClientCnxn.java:852] - Socket connection established to 192.168.1.102/192.168.1.102:2181, initiating session 2014-05-13 23:54:45,765 92 [main-SendThread(192.168.1.102:2181)] INFO [ClientCnxn.java:1235] - Session establishment complete on server 192.168.1.102/192.168.1.102:2181, sessionid = 0x145f6068b8c0006, negotiated timeout = 30000 2014-05-13 23:54:45,768 95 [main-EventThread] INFO [Test.java:23] - process:None 2014-05-13 23:54:45,788 115 [main] INFO [Test.java:57] - 创建成功:/test001 2014-05-13 23:54:45,797 124 [main] INFO [Test.java:60] - exists: 2014-05-13 23:54:45,801 128 [main] INFO [Test.java:64] - 获取：test001data 2014-05-13 23:54:45,806 133 [main] INFO [Test.java:69] - 获取：test1001,ceshi