zk set 方法

[root@wx03 zook]# cat a4.pl 
use ZooKeeper;
use AnyEvent;
use AE;
use Data::Dumper;
   my $zk = ZooKeeper->new(hosts => '127.0.0.1:2181');
   my $stat = $zk->exists('/zk01');
   if ($stat){
              $zk->delete('/zk01');
    }
   my $created_path = $zk->create('/zk01', 'scan1000',
                                   ephemeral => 1, 
                                   sequential => 1,
                                   'acl' => ZOO_OPEN_ACL_UNSAFE);    
    ###获取数据
    print Dumper($zk->get("/zk01"));

   ###修改数据
    $zk->set('/zk01' =>'scan9912472388');
    print Dumper($zk->get("/zk01")); 
     my $cv = AE::cv;
    ###获取数据
    my @children = $zk->get('/zk01', watcher => sub { 
        ###事件状态
        my $event = shift;
        print "触发了事件.";
        print $event->{'type'}."
";
        print "事件状态.";
        print $event->{'state'}."
";
        $cv->send($event) });