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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.io.Closeable;</span>
<span class="source-line-no">021</span><span id="line-21">import java.io.IOException;</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.ZooKeeperConnectionException;</span>
<span class="source-line-no">026</span><span id="line-26">import org.apache.yetus.audience.InterfaceAudience;</span>
<span class="source-line-no">027</span><span id="line-27">import org.apache.zookeeper.ZooKeeperMain;</span>
<span class="source-line-no">028</span><span id="line-28">import org.apache.zookeeper.cli.CliException;</span>
<span class="source-line-no">029</span><span id="line-29"></span>
<span class="source-line-no">030</span><span id="line-30">/**</span>
<span class="source-line-no">031</span><span id="line-31"> * Tool for running ZookeeperMain from HBase by reading a ZooKeeper server from HBase XML</span>
<span class="source-line-no">032</span><span id="line-32"> * configuration.</span>
<span class="source-line-no">033</span><span id="line-33"> */</span>
<span class="source-line-no">034</span><span id="line-34">@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.TOOLS)</span>
<span class="source-line-no">035</span><span id="line-35">public class ZKMainServer {</span>
<span class="source-line-no">036</span><span id="line-36"> private static final String SERVER_ARG = "-server";</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 String parse(final Configuration c) {</span>
<span class="source-line-no">039</span><span id="line-39"> return ZKConfig.getZKQuorumServersString(c);</span>
<span class="source-line-no">040</span><span id="line-40"> }</span>
<span class="source-line-no">041</span><span id="line-41"></span>
<span class="source-line-no">042</span><span id="line-42"> /**</span>
<span class="source-line-no">043</span><span id="line-43"> * ZooKeeper 3.4.6 broke being able to pass commands on command line. See ZOOKEEPER-1897,</span>
<span class="source-line-no">044</span><span id="line-44"> * ZOOKEEPER-4804. This class is a hack to restore this faclity.</span>
<span class="source-line-no">045</span><span id="line-45"> */</span>
<span class="source-line-no">046</span><span id="line-46"> private static class HACK_UNTIL_ZOOKEEPER_1897_ZooKeeperMain extends ZooKeeperMain</span>
<span class="source-line-no">047</span><span id="line-47"> implements Closeable {</span>
<span class="source-line-no">048</span><span id="line-48"> public HACK_UNTIL_ZOOKEEPER_1897_ZooKeeperMain(String[] args)</span>
<span class="source-line-no">049</span><span id="line-49"> throws IOException, InterruptedException {</span>
<span class="source-line-no">050</span><span id="line-50"> super(args);</span>
<span class="source-line-no">051</span><span id="line-51"> // Make sure we are connected before we proceed. Can take a while on some systems. If we</span>
<span class="source-line-no">052</span><span id="line-52"> // run the command without being connected, we get ConnectionLoss KeeperErrorConnection...</span>
<span class="source-line-no">053</span><span id="line-53"> // Make it 30seconds. We dont' have a config in this context and zk doesn't have</span>
<span class="source-line-no">054</span><span id="line-54"> // a timeout until after connection. 30000ms is default for zk.</span>
<span class="source-line-no">055</span><span id="line-55"> try {</span>
<span class="source-line-no">056</span><span id="line-56"> ZooKeeperHelper.ensureConnectedZooKeeper(this.zk, 30000);</span>
<span class="source-line-no">057</span><span id="line-57"> } catch (ZooKeeperConnectionException e) {</span>
<span class="source-line-no">058</span><span id="line-58"> this.zk.close();</span>
<span class="source-line-no">059</span><span id="line-59"> }</span>
<span class="source-line-no">060</span><span id="line-60"> }</span>
<span class="source-line-no">061</span><span id="line-61"></span>
<span class="source-line-no">062</span><span id="line-62"> /**</span>
<span class="source-line-no">063</span><span id="line-63"> * Run the command-line args passed. Calls System.exit when done.</span>
<span class="source-line-no">064</span><span id="line-64"> * @throws IOException in case of a network failure</span>
<span class="source-line-no">065</span><span id="line-65"> * @throws InterruptedException if the ZooKeeper client closes</span>
<span class="source-line-no">066</span><span id="line-66"> * @throws CliException if the ZooKeeper exception happens in cli command</span>
<span class="source-line-no">067</span><span id="line-67"> */</span>
<span class="source-line-no">068</span><span id="line-68"> void runCmdLine() throws IOException, InterruptedException, CliException {</span>
<span class="source-line-no">069</span><span id="line-69"> processCmd(this.cl);</span>
<span class="source-line-no">070</span><span id="line-70"> System.exit(0);</span>
<span class="source-line-no">071</span><span id="line-71"> }</span>
<span class="source-line-no">072</span><span id="line-72"></span>
<span class="source-line-no">073</span><span id="line-73"> @Override</span>
<span class="source-line-no">074</span><span id="line-74"> public void close() throws IOException {</span>
<span class="source-line-no">075</span><span id="line-75"> try {</span>
<span class="source-line-no">076</span><span id="line-76"> this.zk.close();</span>
<span class="source-line-no">077</span><span id="line-77"> } catch (InterruptedException e) {</span>
<span class="source-line-no">078</span><span id="line-78"> Thread.currentThread().interrupt();</span>
<span class="source-line-no">079</span><span id="line-79"> }</span>
<span class="source-line-no">080</span><span id="line-80"> }</span>
<span class="source-line-no">081</span><span id="line-81"> }</span>
<span class="source-line-no">082</span><span id="line-82"></span>
<span class="source-line-no">083</span><span id="line-83"> /**</span>
<span class="source-line-no">084</span><span id="line-84"> * @param args the arguments to check</span>
<span class="source-line-no">085</span><span id="line-85"> * @return True if argument strings have a '-server' in them.</span>
<span class="source-line-no">086</span><span id="line-86"> */</span>
<span class="source-line-no">087</span><span id="line-87"> private static boolean hasServer(final String[] args) {</span>
<span class="source-line-no">088</span><span id="line-88"> return args.length &gt; 0 &amp;&amp; args[0].equals(SERVER_ARG);</span>
<span class="source-line-no">089</span><span id="line-89"> }</span>
<span class="source-line-no">090</span><span id="line-90"></span>
<span class="source-line-no">091</span><span id="line-91"> /**</span>
<span class="source-line-no">092</span><span id="line-92"> * @param args the arguments to check for command-line arguments</span>
<span class="source-line-no">093</span><span id="line-93"> * @return True if command-line arguments were passed.</span>
<span class="source-line-no">094</span><span id="line-94"> */</span>
<span class="source-line-no">095</span><span id="line-95"> private static boolean hasCommandLineArguments(final String[] args) {</span>
<span class="source-line-no">096</span><span id="line-96"> if (hasServer(args)) {</span>
<span class="source-line-no">097</span><span id="line-97"> if (args.length &lt; 2) {</span>
<span class="source-line-no">098</span><span id="line-98"> throw new IllegalStateException("-server param but no value");</span>
<span class="source-line-no">099</span><span id="line-99"> }</span>
<span class="source-line-no">100</span><span id="line-100"></span>
<span class="source-line-no">101</span><span id="line-101"> return args.length &gt; 2;</span>
<span class="source-line-no">102</span><span id="line-102"> }</span>
<span class="source-line-no">103</span><span id="line-103"></span>
<span class="source-line-no">104</span><span id="line-104"> return args.length &gt; 0;</span>
<span class="source-line-no">105</span><span id="line-105"> }</span>
<span class="source-line-no">106</span><span id="line-106"></span>
<span class="source-line-no">107</span><span id="line-107"> /**</span>
<span class="source-line-no">108</span><span id="line-108"> * Run the tool.</span>
<span class="source-line-no">109</span><span id="line-109"> * @param args Command line arguments. First arg is path to zookeepers file.</span>
<span class="source-line-no">110</span><span id="line-110"> */</span>
<span class="source-line-no">111</span><span id="line-111"> public static void main(String[] args) throws Exception {</span>
<span class="source-line-no">112</span><span id="line-112"> String[] newArgs = args;</span>
<span class="source-line-no">113</span><span id="line-113"> if (!hasServer(args)) {</span>
<span class="source-line-no">114</span><span id="line-114"> // Add the zk ensemble from configuration if none passed on command-line.</span>
<span class="source-line-no">115</span><span id="line-115"> Configuration conf = HBaseConfiguration.create();</span>
<span class="source-line-no">116</span><span id="line-116"> String hostport = new ZKMainServer().parse(conf);</span>
<span class="source-line-no">117</span><span id="line-117"> if (hostport != null &amp;&amp; hostport.length() &gt; 0) {</span>
<span class="source-line-no">118</span><span id="line-118"> newArgs = new String[args.length + 2];</span>
<span class="source-line-no">119</span><span id="line-119"> System.arraycopy(args, 0, newArgs, 2, args.length);</span>
<span class="source-line-no">120</span><span id="line-120"> newArgs[0] = "-server";</span>
<span class="source-line-no">121</span><span id="line-121"> newArgs[1] = hostport;</span>
<span class="source-line-no">122</span><span id="line-122"> }</span>
<span class="source-line-no">123</span><span id="line-123"> }</span>
<span class="source-line-no">124</span><span id="line-124"> // If command-line arguments, run our hack so they are executed.</span>
<span class="source-line-no">125</span><span id="line-125"> // ZOOKEEPER-1897 was committed to zookeeper-3.4.6 but elsewhere in this class we say</span>
<span class="source-line-no">126</span><span id="line-126"> // 3.4.6 breaks command-processing; TODO.</span>
<span class="source-line-no">127</span><span id="line-127"> if (hasCommandLineArguments(args)) {</span>
<span class="source-line-no">128</span><span id="line-128"> try (HACK_UNTIL_ZOOKEEPER_1897_ZooKeeperMain zkm =</span>
<span class="source-line-no">129</span><span id="line-129"> new HACK_UNTIL_ZOOKEEPER_1897_ZooKeeperMain(newArgs)) {</span>
<span class="source-line-no">130</span><span id="line-130"> zkm.runCmdLine();</span>
<span class="source-line-no">131</span><span id="line-131"> }</span>
<span class="source-line-no">132</span><span id="line-132"> } else {</span>
<span class="source-line-no">133</span><span id="line-133"> ZooKeeperMain.main(newArgs);</span>
<span class="source-line-no">134</span><span id="line-134"> }</span>
<span class="source-line-no">135</span><span id="line-135"> }</span>
<span class="source-line-no">136</span><span id="line-136">}</span>
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