1 /** 2 * Copyright 2010 The Apache Software Foundation 3 * 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 21 package org.apache.hadoop.hbase.zookeeper; 22 23 import org.apache.hadoop.conf.Configuration; 24 import org.apache.hadoop.hbase.HBaseConfiguration; 25 import org.apache.hadoop.hbase.HConstants; 26 27 import java.util.Map.Entry; 28 import java.util.Properties; 29 30 /** 31 * Tool for reading ZooKeeper servers from HBase XML configuation and producing 32 * a line-by-line list for use by bash scripts. 33 */ 34 public class ZKServerTool { 35 /** 36 * Run the tool. 37 * @param args Command line arguments. First arg is path to zookeepers file. 38 */ 39 public static void main(String args[]) { 40 Configuration conf = HBaseConfiguration.create(); 41 // Note that we do not simply grab the property 42 // HConstants.ZOOKEEPER_QUORUM from the HBaseConfiguration because the 43 // user may be using a zoo.cfg file. 44 Properties zkProps = HQuorumPeer.makeZKProps(conf); 45 for (Entry<Object, Object> entry : zkProps.entrySet()) { 46 String key = entry.getKey().toString().trim(); 47 String value = entry.getValue().toString().trim(); 48 if (key.startsWith("server.")) { 49 String[] parts = value.split(":"); 50 String host = parts[0]; 51 System.out.println(host); 52 } 53 } 54 } 55 }