package org.ds; import org.apache.zookeeper.*; import org.ds.interfaces.Queue; import org.ds.utils.DistributedLock; import org.ds.utils.Helper; import java.util.List; public class LockQueue implements Queue { private ZooKeeper zk; private String queuePath; public LockQueue(ZooKeeper zk, String queuePath) throws InterruptedException, KeeperException { this.zk = zk; this.queuePath = queuePath; Helper.createNodeIfDoesNotExists(zk, queuePath); } public void enqueue(String item) throws Exception { // Create an item node under the queue node with the item data } public String dequeue() throws Exception { return ""; } }