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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.zookeeper;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.util.LinkedList;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.List;</span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.hbase.HBaseConfiguration;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.HBaseInterfaceAudience;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.HConstants;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.ServerName;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">028</span><span id="line-28"></span> |
| <span class="source-line-no">029</span><span id="line-29">/**</span> |
| <span class="source-line-no">030</span><span id="line-30"> * Tool for reading ZooKeeper servers from HBase XML configuration and producing a line-by-line list</span> |
| <span class="source-line-no">031</span><span id="line-31"> * for use by bash scripts.</span> |
| <span class="source-line-no">032</span><span id="line-32"> */</span> |
| <span class="source-line-no">033</span><span id="line-33">@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.TOOLS)</span> |
| <span class="source-line-no">034</span><span id="line-34">public final class ZKServerTool {</span> |
| <span class="source-line-no">035</span><span id="line-35"> private ZKServerTool() {</span> |
| <span class="source-line-no">036</span><span id="line-36"> }</span> |
| <span class="source-line-no">037</span><span id="line-37"></span> |
| <span class="source-line-no">038</span><span id="line-38"> public static ServerName[] readZKNodes(Configuration conf) {</span> |
| <span class="source-line-no">039</span><span id="line-39"> List<ServerName> hosts = new LinkedList<>();</span> |
| <span class="source-line-no">040</span><span id="line-40"> String quorum = conf.get(HConstants.ZOOKEEPER_QUORUM, HConstants.LOCALHOST);</span> |
| <span class="source-line-no">041</span><span id="line-41"></span> |
| <span class="source-line-no">042</span><span id="line-42"> String[] values = quorum.split(",");</span> |
| <span class="source-line-no">043</span><span id="line-43"> for (String value : values) {</span> |
| <span class="source-line-no">044</span><span id="line-44"> String[] parts = value.split(":");</span> |
| <span class="source-line-no">045</span><span id="line-45"> String host = parts[0];</span> |
| <span class="source-line-no">046</span><span id="line-46"> int port = HConstants.DEFAULT_ZOOKEEPER_CLIENT_PORT;</span> |
| <span class="source-line-no">047</span><span id="line-47"> if (parts.length > 1) {</span> |
| <span class="source-line-no">048</span><span id="line-48"> port = Integer.parseInt(parts[1]);</span> |
| <span class="source-line-no">049</span><span id="line-49"> }</span> |
| <span class="source-line-no">050</span><span id="line-50"> hosts.add(ServerName.valueOf(host, port, -1));</span> |
| <span class="source-line-no">051</span><span id="line-51"> }</span> |
| <span class="source-line-no">052</span><span id="line-52"> return hosts.toArray(new ServerName[hosts.size()]);</span> |
| <span class="source-line-no">053</span><span id="line-53"> }</span> |
| <span class="source-line-no">054</span><span id="line-54"></span> |
| <span class="source-line-no">055</span><span id="line-55"> /**</span> |
| <span class="source-line-no">056</span><span id="line-56"> * Run the tool.</span> |
| <span class="source-line-no">057</span><span id="line-57"> * @param args Command line arguments.</span> |
| <span class="source-line-no">058</span><span id="line-58"> */</span> |
| <span class="source-line-no">059</span><span id="line-59"> public static void main(String[] args) {</span> |
| <span class="source-line-no">060</span><span id="line-60"> for (ServerName server : readZKNodes(HBaseConfiguration.create())) {</span> |
| <span class="source-line-no">061</span><span id="line-61"> // bin/zookeeper.sh relies on the "ZK host" string for grepping which is case sensitive.</span> |
| <span class="source-line-no">062</span><span id="line-62"> System.out.println("ZK host: " + server.getHostname());</span> |
| <span class="source-line-no">063</span><span id="line-63"> }</span> |
| <span class="source-line-no">064</span><span id="line-64"> }</span> |
| <span class="source-line-no">065</span><span id="line-65">}</span> |
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