| /** |
| * |
| * 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.hadoop.hbase.zookeeper; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.HBaseConfiguration; |
| import org.apache.hadoop.hbase.HBaseInterfaceAudience; |
| import org.apache.hadoop.hbase.HConstants; |
| import org.apache.hadoop.hbase.ServerName; |
| import org.apache.hadoop.hbase.classification.InterfaceAudience; |
| |
| import java.util.LinkedList; |
| import java.util.List; |
| |
| /** |
| * Tool for reading ZooKeeper servers from HBase XML configuration and producing |
| * a line-by-line list for use by bash scripts. |
| */ |
| @InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.TOOLS) |
| public class ZKServerTool { |
| public static ServerName[] readZKNodes(Configuration conf) { |
| List<ServerName> hosts = new LinkedList<ServerName>(); |
| String quorum = conf.get(HConstants.ZOOKEEPER_QUORUM, HConstants.LOCALHOST); |
| |
| String[] values = quorum.split(","); |
| for (String value : values) { |
| String[] parts = value.split(":"); |
| String host = parts[0]; |
| int port = HConstants.DEFAULT_ZOOKEPER_CLIENT_PORT; |
| if (parts.length > 1) { |
| port = Integer.parseInt(parts[1]); |
| } |
| hosts.add(ServerName.valueOf(host, port, -1)); |
| } |
| return hosts.toArray(new ServerName[hosts.size()]); |
| } |
| |
| /** |
| * Run the tool. |
| * @param args Command line arguments. |
| */ |
| public static void main(String args[]) { |
| for(ServerName server: readZKNodes(HBaseConfiguration.create())) { |
| // bin/zookeeper.sh relies on the "ZK host" string for grepping which is case sensitive. |
| System.out.println("ZK host: " + server.getHostname()); |
| } |
| } |
| } |