zookeeper java調用及權限控制
import java.io.IOException;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.List;
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.ZooDefs.Ids;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.data.ACL;
import org.apache.zookeeper.data.Id;
import org.apache.zookeeper.server.auth.DigestAuthenticationProvider;
/**
* @author Keeny (2013-12-31)
**/
public class Test {
public static void main(String[] args) throws IOException, KeeperException, InterruptedException, NoSuchAlgorithmException {
ZooKeeper zk = new ZooKeeper("192.168.192.142:2181", 500000, new Watcher() {
// 監控所有被觸發的事件
public void process(WatchedEvent event) {
System.out.println("WatchedEvent=" + event.toString());
// dosomething
}
});
// 創建一個節點root,數據是mydata,不進行ACL權限控制,節點爲永久性的(即客戶端shutdown了也不會消失)
List<ACL> acls = new ArrayList<ACL>(2);
Id id1 = new Id("digest", DigestAuthenticationProvider.generateDigest("admin:admin123"));
ACL acl1 = new ACL(ZooDefs.Perms.ALL, id1);
Id id2 = new Id("digest", DigestAuthenticationProvider.generateDigest("guest:guest123"));
ACL acl2 = new ACL(ZooDefs.Perms.READ, id2);
acls.add(acl1);
acls.add(acl2); //設置權限
// String root = zk.create("/root/test1", "test".getBytes(), acls, CreateMode.PERSISTENT);
// System.out.println("root=" + root);
// 在root下面創建一個childone znode,數據爲childone,不進行ACL權限控制,節點爲永久性的
// String childone = zk.create("/root/childone", "childone".getBytes(),
// Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
// System.out.println("childone=" + childone);
// 取得/root節點下的子節點名稱,返回List<String>
zk.addAuthInfo("digest", "admin:chinatetadmin1234".getBytes()); //設置權限
List<String> lsit = zk.getChildren("/root", true);
for (String string : lsit) {
System.out.println("節點:" + string);
}
// 取得/root/childone節點下的數據,返回byte[]
byte[] childoneData = zk.getData("/root/msg", true, null);
System.out.println("childoneData=" + new String(childoneData));
// 修改節點/root/childone下的數據,第三個參數爲版本,如果是-1,那會無視被修改的數據版本,直接改掉
// zk.setData("/root/childone", "childonemodify".getBytes(), -1);
// 刪除/root/childone這個節點,第二個參數爲版本,-1的話直接刪除,無視版本
// zk.delete("/root/msg", -1);
//
// zk.delete("/root/msg", -1);
// 關閉session
zk.close();
}
}
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