question: @ Override public boolean lock ( ) { try { lockPath = zk . create ( this . lockTypeFolder + CarbonCommonConstants . FILE_SEPARATOR + lockName , null , Ids . OPEN_ACL_UNSAFE , CreateMode . EPHEMERAL_SEQUENTIAL ) ; List < String > nodes = zk . getChildren ( this . lockTypeFolder , null ) ; Collections . sort ( nodes ) ; if ( lockPath . endsWith ( nodes . get ( 0 ) ) ) { return true ; } else { zk . delete ( lockPath , - 1 ) ; return false ; } } catch ( KeeperException | InterruptedException e ) { LOGGER . error ( e , e . getMessage ( ) ) ; return false ; } }
target:  Handling of the locking mechanism using zoo keeper.