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 java.util.Properties;
24 import java.util.Map.Entry;
25
26 import org.apache.hadoop.conf.Configuration;
27 import org.apache.hadoop.hbase.HBaseConfiguration;
28
29 /**
30 * Tool for reading ZooKeeper servers from HBase XML configuration and producing
31 * a line-by-line list for use by bash scripts.
32 */
33 public class ZKServerTool {
34 /**
35 * Run the tool.
36 * @param args Command line arguments.
37 */
38 public static void main(String args[]) {
39 Configuration conf = HBaseConfiguration.create();
40 // Note that we do not simply grab the property
41 // HConstants.ZOOKEEPER_QUORUM from the HBaseConfiguration because the
42 // user may be using a zoo.cfg file.
43 Properties zkProps = ZKConfig.makeZKProps(conf);
44 for (Entry<Object, Object> entry : zkProps.entrySet()) {
45 String key = entry.getKey().toString().trim();
46 String value = entry.getValue().toString().trim();
47 if (key.startsWith("server.")) {
48 String[] parts = value.split(":");
49 String host = parts[0];
50 System.out.println("ZK host:" + host);
51 }
52 }
53 }
54 }