| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.carbondata.core.locks; |
| |
| import java.io.IOException; |
| |
| import org.apache.carbondata.common.logging.LogServiceFactory; |
| |
| import org.apache.log4j.Logger; |
| import org.apache.zookeeper.WatchedEvent; |
| import org.apache.zookeeper.Watcher; |
| import org.apache.zookeeper.ZooKeeper; |
| |
| /** |
| * This is a singleton class for initialization of zookeeper client. |
| */ |
| public class ZookeeperInit { |
| |
| private static final Logger LOGGER = |
| LogServiceFactory.getLogService(ZookeeperInit.class.getName()); |
| |
| private static ZookeeperInit zooKeeperInit; |
| /** |
| * zk is the zookeeper client instance |
| */ |
| private ZooKeeper zk; |
| |
| private ZookeeperInit(String zooKeeperUrl) { |
| |
| int sessionTimeOut = 100000; |
| try { |
| zk = new ZooKeeper(zooKeeperUrl, sessionTimeOut, new DummyWatcher()); |
| |
| } catch (IOException e) { |
| LOGGER.error(e.getMessage(), e); |
| } |
| |
| } |
| |
| public static ZookeeperInit getInstance(String zooKeeperUrl) { |
| |
| synchronized (ZookeeperInit.class) { |
| if (null == zooKeeperInit) { |
| LOGGER.info("Initiating Zookeeper client."); |
| zooKeeperInit = new ZookeeperInit(zooKeeperUrl); |
| } |
| } |
| return zooKeeperInit; |
| |
| } |
| |
| public ZooKeeper getZookeeper() { |
| return zk; |
| } |
| |
| private static class DummyWatcher implements Watcher { |
| public void process(WatchedEvent event) { |
| } |
| } |
| } |