The code bellow let you set the ACL of a zNode.

To set the ACL of a zNode you have to define:
► The ACL Scheme: "world", "auth", "digest", "ip".
► The ACL Scheme Id: for example, the scheme "world" has a single Id "anyone".
► The ACL permissions: "ALL", "ADMIN", "CREATE", "DELETE", "READ", "WRITE".

Calling the method "CuratorFramework::setACL" will initialize the ACL of a zNode and return a "Stat" object.

You will get this error if the zNode doesn't exist in ZooKeeper:

org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /path

You will get this error if the ACL is invalid:

org.apache.zookeeper.KeeperException$InvalidACLException: KeeperErrorCode = InvalidACL for /path

You will get this error if you don't have permissions to set the ACL of a zNode:

org.apache.zookeeper.KeeperException$NoAuthException: KeeperErrorCode = NoAuth for /path

In order for the code bellow to work:
► Make sure to update the "CONNECT_STRING" variable with your information.

Here's an example of how to set the ACL of a zNode:

final String CONNECT_STRING = "localhost:2181";

final int SESSION_TIMEOUT_MS = Integer.valueOf(60 * 1000);
final int CONNECTION_TIMEOUT_MS = Integer.valueOf(15 * 1000);
final RetryPolicy RETRY_POLICY = new RetryOneTime(1000);

// -- CuratorFrameworkFactory::newClient
final CuratorFramework curatorFramework = CuratorFrameworkFactory.newClient(CONNECT_STRING, SESSION_TIMEOUT_MS, CONNECTION_TIMEOUT_MS, RETRY_POLICY);

// -- CuratorFramework::start
curatorFramework.start();

// -- CuratorFramework::setACL
final String path = "/abc";

// using scheme:id:perms syntax
final List<ACL> acls = AclParser.parse("ip:127.0.0.1:cdraw,world:anyone:rwcda");

// using ACL class
{
    final ACL acl = new ACL();

    acl.setId(new Id("ip", "127.0.0.2"));
    acl.setPerms(ZooDefs.Perms.ALL);
    // acl.setPerms(ZooDefs.Perms.READ);
    // acl.setPerms(ZooDefs.Perms.WRITE);
    // acl.setPerms(ZooDefs.Perms.CREATE);
    // acl.setPerms(ZooDefs.Perms.DELETE);
    // acl.setPerms(ZooDefs.Perms.ADMIN);

    acls.add(acl);
}

final Stat stat = curatorFramework.setACL().withACL(acls).forPath(path);

System.out.println(stat);

// -- CuratorFramework::close
curatorFramework.close();