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apache / trafodion-site / 0f742caac55ca35044838df47d6a6f41c1f568e2 / . / 2.4.0 / dcs_reference / xref / org / trafodion / dcs / master / DcsMaster.html
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<a class="jxr_linenumber" name="1" href="#1">1</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="2" href="#2">2</a> <em class="jxr_javadoccomment">* @@@ START COPYRIGHT @@@</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>
<a class="jxr_linenumber" name="4" href="#4">4</a> <em class="jxr_javadoccomment">Licensed to the Apache Software Foundation (ASF) under one</em>
<a class="jxr_linenumber" name="5" href="#5">5</a> <em class="jxr_javadoccomment">or more contributor license agreements. See the NOTICE file</em>
<a class="jxr_linenumber" name="6" href="#6">6</a> <em class="jxr_javadoccomment">distributed with this work for additional information</em>
<a class="jxr_linenumber" name="7" href="#7">7</a> <em class="jxr_javadoccomment">regarding copyright ownership. The ASF licenses this file</em>
<a class="jxr_linenumber" name="8" href="#8">8</a> <em class="jxr_javadoccomment">to you under the Apache License, Version 2.0 (the</em>
<a class="jxr_linenumber" name="9" href="#9">9</a> <em class="jxr_javadoccomment">"License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="10" href="#10">10</a> <em class="jxr_javadoccomment">with the License. You may obtain a copy of the License at</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>
<a class="jxr_linenumber" name="12" href="#12">12</a> <em class="jxr_javadoccomment"> <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="13" href="#13">13</a>
<a class="jxr_linenumber" name="14" href="#14">14</a> <em class="jxr_javadoccomment">Unless required by applicable law or agreed to in writing,</em>
<a class="jxr_linenumber" name="15" href="#15">15</a> <em class="jxr_javadoccomment">software distributed under the License is distributed on an</em>
<a class="jxr_linenumber" name="16" href="#16">16</a> <em class="jxr_javadoccomment">"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em>
<a class="jxr_linenumber" name="17" href="#17">17</a> <em class="jxr_javadoccomment">KIND, either express or implied. See the License for the</em>
<a class="jxr_linenumber" name="18" href="#18">18</a> <em class="jxr_javadoccomment">specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="19" href="#19">19</a> <em class="jxr_javadoccomment">under the License.</em>
<a class="jxr_linenumber" name="20" href="#20">20</a>
<a class="jxr_linenumber" name="21" href="#21">21</a> <em class="jxr_javadoccomment">* @@@ END COPYRIGHT @@@</em>
<a class="jxr_linenumber" name="22" href="#22">22</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="23" href="#23">23</a> <strong class="jxr_keyword">package</strong> org.trafodion.dcs.master;
<a class="jxr_linenumber" name="24" href="#24">24</a>
<a class="jxr_linenumber" name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> java.io.IOException;
<a class="jxr_linenumber" name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> java.io.InputStream;
<a class="jxr_linenumber" name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> java.net.InetAddress;
<a class="jxr_linenumber" name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> java.net.InetSocketAddress;
<a class="jxr_linenumber" name="29" href="#29">29</a> <strong class="jxr_keyword">import</strong> java.net.ServerSocket;
<a class="jxr_linenumber" name="30" href="#30">30</a> <strong class="jxr_keyword">import</strong> java.net.NetworkInterface;
<a class="jxr_linenumber" name="31" href="#31">31</a> <strong class="jxr_keyword">import</strong> java.nio.charset.Charset;
<a class="jxr_linenumber" name="32" href="#32">32</a> <strong class="jxr_keyword">import</strong> java.util.Enumeration;
<a class="jxr_linenumber" name="33" href="#33">33</a> <strong class="jxr_keyword">import</strong> java.util.*;
<a class="jxr_linenumber" name="34" href="#34">34</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.CountDownLatch;
<a class="jxr_linenumber" name="35" href="#35">35</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.Executors;
<a class="jxr_linenumber" name="36" href="#36">36</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.ExecutorService;
<a class="jxr_linenumber" name="37" href="#37">37</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.Future;
<a class="jxr_linenumber" name="38" href="#38">38</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.ExecutionException;
<a class="jxr_linenumber" name="39" href="#39">39</a>
<a class="jxr_linenumber" name="40" href="#40">40</a> <strong class="jxr_keyword">import</strong> org.apache.commons.io.IOUtils;
<a class="jxr_linenumber" name="41" href="#41">41</a> <strong class="jxr_keyword">import</strong> org.apache.commons.cli.CommandLine;
<a class="jxr_linenumber" name="42" href="#42">42</a> <strong class="jxr_keyword">import</strong> org.apache.commons.cli.GnuParser;
<a class="jxr_linenumber" name="43" href="#43">43</a> <strong class="jxr_keyword">import</strong> org.apache.commons.cli.Options;
<a class="jxr_linenumber" name="44" href="#44">44</a> <strong class="jxr_keyword">import</strong> org.apache.commons.cli.ParseException;
<a class="jxr_linenumber" name="45" href="#45">45</a> <strong class="jxr_keyword">import</strong> org.apache.commons.logging.Log;
<a class="jxr_linenumber" name="46" href="#46">46</a> <strong class="jxr_keyword">import</strong> org.apache.commons.logging.LogFactory;
<a class="jxr_linenumber" name="47" href="#47">47</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.conf.Configuration;
<a class="jxr_linenumber" name="48" href="#48">48</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.CreateMode;
<a class="jxr_linenumber" name="49" href="#49">49</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.ZooDefs;
<a class="jxr_linenumber" name="50" href="#50">50</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.data.Stat;
<a class="jxr_linenumber" name="51" href="#51">51</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.KeeperException;
<a class="jxr_linenumber" name="52" href="#52">52</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.ZooKeeper.States;
<a class="jxr_linenumber" name="53" href="#53">53</a>
<a class="jxr_linenumber" name="54" href="#54">54</a> <strong class="jxr_keyword">import</strong> org.apache.hadoop.util.StringUtils;
<a class="jxr_linenumber" name="55" href="#55">55</a>
<a class="jxr_linenumber" name="56" href="#56">56</a> <strong class="jxr_keyword">import</strong> org.trafodion.dcs.Constants;
<a class="jxr_linenumber" name="57" href="#57">57</a> <strong class="jxr_keyword">import</strong> org.trafodion.dcs.util.Bytes;
<a class="jxr_linenumber" name="58" href="#58">58</a> <strong class="jxr_keyword">import</strong> org.trafodion.dcs.util.DcsConfiguration;
<a class="jxr_linenumber" name="59" href="#59">59</a> <strong class="jxr_keyword">import</strong> org.trafodion.dcs.util.DcsNetworkConfiguration;
<a class="jxr_linenumber" name="60" href="#60">60</a> <strong class="jxr_keyword">import</strong> org.trafodion.dcs.util.InfoServer;
<a class="jxr_linenumber" name="61" href="#61">61</a> <strong class="jxr_keyword">import</strong> org.trafodion.dcs.util.VersionInfo;
<a class="jxr_linenumber" name="62" href="#62">62</a> <strong class="jxr_keyword">import</strong> org.trafodion.dcs.zookeeper.ZkClient;
<a class="jxr_linenumber" name="63" href="#63">63</a> <strong class="jxr_keyword">import</strong> org.trafodion.dcs.zookeeper.ZKConfig;
<a class="jxr_linenumber" name="64" href="#64">64</a> <strong class="jxr_keyword">import</strong> org.trafodion.dcs.master.listener.ListenerService;
<a class="jxr_linenumber" name="65" href="#65">65</a>
<a class="jxr_linenumber" name="66" href="#66">66</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/trafodion/dcs/master/DcsMaster.html">DcsMaster</a> <strong class="jxr_keyword">implements</strong> Runnable {
<a class="jxr_linenumber" name="67" href="#67">67</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Log LOG = LogFactory.getLog(DcsMaster.<strong class="jxr_keyword">class</strong>);
<a class="jxr_linenumber" name="68" href="#68">68</a> <strong class="jxr_keyword">private</strong> Thread thrd;
<a class="jxr_linenumber" name="69" href="#69">69</a> <strong class="jxr_keyword">private</strong> <a href="../../../../org/trafodion/dcs/zookeeper/ZkClient.html">ZkClient</a> zkc = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="70" href="#70">70</a> <strong class="jxr_keyword">private</strong> Configuration conf;
<a class="jxr_linenumber" name="71" href="#71">71</a> <strong class="jxr_keyword">private</strong> <a href="../../../../org/trafodion/dcs/util/DcsNetworkConfiguration.html">DcsNetworkConfiguration</a> netConf;
<a class="jxr_linenumber" name="72" href="#72">72</a> <strong class="jxr_keyword">private</strong> String[] args;
<a class="jxr_linenumber" name="73" href="#73">73</a> <strong class="jxr_keyword">private</strong> String instance = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="74" href="#74">74</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> port;
<a class="jxr_linenumber" name="75" href="#75">75</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> portRange;
<a class="jxr_linenumber" name="76" href="#76">76</a> <strong class="jxr_keyword">private</strong> <a href="../../../../org/trafodion/dcs/util/InfoServer.html">InfoServer</a> infoServer;
<a class="jxr_linenumber" name="77" href="#77">77</a> <strong class="jxr_keyword">private</strong> String serverName;
<a class="jxr_linenumber" name="78" href="#78">78</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> infoPort;
<a class="jxr_linenumber" name="79" href="#79">79</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">long</strong> startTime;
<a class="jxr_linenumber" name="80" href="#80">80</a> <strong class="jxr_keyword">private</strong> <a href="../../../../org/trafodion/dcs/master/ServerManager.html">ServerManager</a> serverManager;
<a class="jxr_linenumber" name="81" href="#81">81</a> <strong class="jxr_keyword">private</strong> <a href="../../../../org/trafodion/dcs/master/listener/ListenerService.html">ListenerService</a> ls;
<a class="jxr_linenumber" name="82" href="#82">82</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String MASTER = <span class="jxr_string">"master"</span>;
<a class="jxr_linenumber" name="83" href="#83">83</a> <strong class="jxr_keyword">private</strong> <a href="../../../../org/trafodion/dcs/master/Metrics.html">Metrics</a> metrics;
<a class="jxr_linenumber" name="84" href="#84">84</a> <strong class="jxr_keyword">private</strong> String parentZnode;
<a class="jxr_linenumber" name="85" href="#85">85</a> <strong class="jxr_keyword">private</strong> ExecutorService pool = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="86" href="#86">86</a> <strong class="jxr_keyword">private</strong> <a href="../../../../org/trafodion/dcs/master/DcsMaster.html">JVMShutdownHook</a> jvmShutdownHook;
<a class="jxr_linenumber" name="87" href="#87">87</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> String trafodionLog;
<a class="jxr_linenumber" name="88" href="#88">88</a> <strong class="jxr_keyword">private</strong> CountDownLatch isLeader = <strong class="jxr_keyword">new</strong> CountDownLatch(1);
<a class="jxr_linenumber" name="89" href="#89">89</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> epoch = 1;
<a class="jxr_linenumber" name="90" href="#90">90</a>
<a class="jxr_linenumber" name="91" href="#91">91</a> <strong class="jxr_keyword">private</strong> <a href="../../../../org/trafodion/dcs/master/MasterLeaderElection.html">MasterLeaderElection</a> mle = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="92" href="#92">92</a>
<a class="jxr_linenumber" name="93" href="#93">93</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/trafodion/dcs/master/DcsMaster.html">JVMShutdownHook</a> <strong class="jxr_keyword">extends</strong> Thread {
<a class="jxr_linenumber" name="94" href="#94">94</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> run() {
<a class="jxr_linenumber" name="95" href="#95">95</a> LOG.debug(<span class="jxr_string">"JVM shutdown hook is running"</span>);
<a class="jxr_linenumber" name="96" href="#96">96</a> <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="97" href="#97">97</a> zkc.close();
<a class="jxr_linenumber" name="98" href="#98">98</a> } <strong class="jxr_keyword">catch</strong> (InterruptedException ie) {
<a class="jxr_linenumber" name="99" href="#99">99</a> }
<a class="jxr_linenumber" name="100" href="#100">100</a> ;
<a class="jxr_linenumber" name="101" href="#101">101</a> }
<a class="jxr_linenumber" name="102" href="#102">102</a> }
<a class="jxr_linenumber" name="103" href="#103">103</a>
<a class="jxr_linenumber" name="104" href="#104">104</a> <strong class="jxr_keyword">public</strong> <a href="../../../../org/trafodion/dcs/master/DcsMaster.html">DcsMaster</a>(String[] args) {
<a class="jxr_linenumber" name="105" href="#105">105</a> <strong class="jxr_keyword">this</strong>.args = args;
<a class="jxr_linenumber" name="106" href="#106">106</a> conf = DcsConfiguration.create();
<a class="jxr_linenumber" name="107" href="#107">107</a> port = conf.getInt(Constants.DCS_MASTER_PORT,
<a class="jxr_linenumber" name="108" href="#108">108</a> Constants.DEFAULT_DCS_MASTER_PORT);
<a class="jxr_linenumber" name="109" href="#109">109</a> portRange = conf.getInt(Constants.DCS_MASTER_PORT_RANGE,
<a class="jxr_linenumber" name="110" href="#110">110</a> Constants.DEFAULT_DCS_MASTER_PORT_RANGE);
<a class="jxr_linenumber" name="111" href="#111">111</a> parentZnode = conf.get(Constants.ZOOKEEPER_ZNODE_PARENT,
<a class="jxr_linenumber" name="112" href="#112">112</a> Constants.DEFAULT_ZOOKEEPER_ZNODE_PARENT);
<a class="jxr_linenumber" name="113" href="#113">113</a> trafodionLog = System.getProperty(Constants.DCS_TRAFODION_LOG);
<a class="jxr_linenumber" name="114" href="#114">114</a> jvmShutdownHook = <strong class="jxr_keyword">new</strong> <a href="../../../../org/trafodion/dcs/master/DcsMaster.html">JVMShutdownHook</a>();
<a class="jxr_linenumber" name="115" href="#115">115</a> Runtime.getRuntime().addShutdownHook(jvmShutdownHook);
<a class="jxr_linenumber" name="116" href="#116">116</a> thrd = <strong class="jxr_keyword">new</strong> Thread(<strong class="jxr_keyword">this</strong>);
<a class="jxr_linenumber" name="117" href="#117">117</a> thrd.start();
<a class="jxr_linenumber" name="118" href="#118">118</a> }
<a class="jxr_linenumber" name="119" href="#119">119</a>
<a class="jxr_linenumber" name="120" href="#120">120</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> run() {
<a class="jxr_linenumber" name="121" href="#121">121</a> VersionInfo.logVersion();
<a class="jxr_linenumber" name="122" href="#122">122</a>
<a class="jxr_linenumber" name="123" href="#123">123</a> Options opt = <strong class="jxr_keyword">new</strong> Options();
<a class="jxr_linenumber" name="124" href="#124">124</a> CommandLine cmd;
<a class="jxr_linenumber" name="125" href="#125">125</a> <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="126" href="#126">126</a> cmd = <strong class="jxr_keyword">new</strong> GnuParser().parse(opt, args);
<a class="jxr_linenumber" name="127" href="#127">127</a> String s = cmd.getArgList().get(0).toString();
<a class="jxr_linenumber" name="128" href="#128">128</a> Integer i = Integer.parseInt(s);
<a class="jxr_linenumber" name="129" href="#129">129</a> instance = s;
<a class="jxr_linenumber" name="130" href="#130">130</a> } <strong class="jxr_keyword">catch</strong> (NumberFormatException nfe) {
<a class="jxr_linenumber" name="131" href="#131">131</a> instance = <span class="jxr_string">"1"</span>;
<a class="jxr_linenumber" name="132" href="#132">132</a> } <strong class="jxr_keyword">catch</strong> (NullPointerException e) {
<a class="jxr_linenumber" name="133" href="#133">133</a> LOG.error(<span class="jxr_string">"No args found: "</span>, e);
<a class="jxr_linenumber" name="134" href="#134">134</a> System.exit(1);
<a class="jxr_linenumber" name="135" href="#135">135</a> } <strong class="jxr_keyword">catch</strong> (ParseException e) {
<a class="jxr_linenumber" name="136" href="#136">136</a> LOG.error(<span class="jxr_string">"Could not parse: "</span>, e);
<a class="jxr_linenumber" name="137" href="#137">137</a> System.exit(1);
<a class="jxr_linenumber" name="138" href="#138">138</a> }
<a class="jxr_linenumber" name="139" href="#139">139</a>
<a class="jxr_linenumber" name="140" href="#140">140</a> <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="141" href="#141">141</a> zkc = <strong class="jxr_keyword">new</strong> <a href="../../../../org/trafodion/dcs/zookeeper/ZkClient.html">ZkClient</a>();
<a class="jxr_linenumber" name="142" href="#142">142</a> zkc.connect();
<a class="jxr_linenumber" name="143" href="#143">143</a> LOG.info(<span class="jxr_string">"Connected to ZooKeeper"</span>);
<a class="jxr_linenumber" name="144" href="#144">144</a> } <strong class="jxr_keyword">catch</strong> (Exception e) {
<a class="jxr_linenumber" name="145" href="#145">145</a> LOG.error(e);
<a class="jxr_linenumber" name="146" href="#146">146</a> System.exit(1);
<a class="jxr_linenumber" name="147" href="#147">147</a> }
<a class="jxr_linenumber" name="148" href="#148">148</a>
<a class="jxr_linenumber" name="149" href="#149">149</a> <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="150" href="#150">150</a> <em class="jxr_comment">// Create the persistent DCS znodes</em>
<a class="jxr_linenumber" name="151" href="#151">151</a> Stat stat = zkc.exists(parentZnode, false);
<a class="jxr_linenumber" name="152" href="#152">152</a> <strong class="jxr_keyword">if</strong> (stat == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="153" href="#153">153</a> zkc.create(parentZnode, <strong class="jxr_keyword">new</strong> byte[0],
<a class="jxr_linenumber" name="154" href="#154">154</a> ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
<a class="jxr_linenumber" name="155" href="#155">155</a> }
<a class="jxr_linenumber" name="156" href="#156">156</a> stat = zkc.exists(parentZnode
<a class="jxr_linenumber" name="157" href="#157">157</a> + Constants.DEFAULT_ZOOKEEPER_ZNODE_PARENT, false);
<a class="jxr_linenumber" name="158" href="#158">158</a> <strong class="jxr_keyword">if</strong> (stat == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="159" href="#159">159</a> zkc.create(parentZnode
<a class="jxr_linenumber" name="160" href="#160">160</a> + Constants.DEFAULT_ZOOKEEPER_ZNODE_PARENT,
<a class="jxr_linenumber" name="161" href="#161">161</a> <strong class="jxr_keyword">new</strong> byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE,
<a class="jxr_linenumber" name="162" href="#162">162</a> CreateMode.PERSISTENT);
<a class="jxr_linenumber" name="163" href="#163">163</a> }
<a class="jxr_linenumber" name="164" href="#164">164</a> stat = zkc.exists(parentZnode
<a class="jxr_linenumber" name="165" href="#165">165</a> + Constants.DEFAULT_ZOOKEEPER_ZNODE_MASTER, false);
<a class="jxr_linenumber" name="166" href="#166">166</a> <strong class="jxr_keyword">if</strong> (stat == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="167" href="#167">167</a> byte[] data = Bytes.toBytes(Long.toString(epoch));
<a class="jxr_linenumber" name="168" href="#168">168</a>
<a class="jxr_linenumber" name="169" href="#169">169</a> zkc.create(parentZnode
<a class="jxr_linenumber" name="170" href="#170">170</a> + Constants.DEFAULT_ZOOKEEPER_ZNODE_MASTER,
<a class="jxr_linenumber" name="171" href="#171">171</a> data, ZooDefs.Ids.OPEN_ACL_UNSAFE,
<a class="jxr_linenumber" name="172" href="#172">172</a> CreateMode.PERSISTENT);
<a class="jxr_linenumber" name="173" href="#173">173</a> }
<a class="jxr_linenumber" name="174" href="#174">174</a> stat = zkc.exists(parentZnode
<a class="jxr_linenumber" name="175" href="#175">175</a> + Constants.DEFAULT_ZOOKEEPER_ZNODE_MASTER_LEADER, false);
<a class="jxr_linenumber" name="176" href="#176">176</a> <strong class="jxr_keyword">if</strong> (stat == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="177" href="#177">177</a> zkc.create(parentZnode
<a class="jxr_linenumber" name="178" href="#178">178</a> + Constants.DEFAULT_ZOOKEEPER_ZNODE_MASTER_LEADER,
<a class="jxr_linenumber" name="179" href="#179">179</a> <strong class="jxr_keyword">new</strong> byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE,
<a class="jxr_linenumber" name="180" href="#180">180</a> CreateMode.PERSISTENT);
<a class="jxr_linenumber" name="181" href="#181">181</a> }
<a class="jxr_linenumber" name="182" href="#182">182</a> stat = zkc.exists(parentZnode
<a class="jxr_linenumber" name="183" href="#183">183</a> + Constants.DEFAULT_ZOOKEEPER_ZNODE_SERVERS, false);
<a class="jxr_linenumber" name="184" href="#184">184</a> <strong class="jxr_keyword">if</strong> (stat == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="185" href="#185">185</a> zkc.create(parentZnode
<a class="jxr_linenumber" name="186" href="#186">186</a> + Constants.DEFAULT_ZOOKEEPER_ZNODE_SERVERS,
<a class="jxr_linenumber" name="187" href="#187">187</a> <strong class="jxr_keyword">new</strong> byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE,
<a class="jxr_linenumber" name="188" href="#188">188</a> CreateMode.PERSISTENT);
<a class="jxr_linenumber" name="189" href="#189">189</a> }
<a class="jxr_linenumber" name="190" href="#190">190</a> stat = zkc.exists(parentZnode
<a class="jxr_linenumber" name="191" href="#191">191</a> + Constants.DEFAULT_ZOOKEEPER_ZNODE_SERVERS_RUNNING, false);
<a class="jxr_linenumber" name="192" href="#192">192</a> <strong class="jxr_keyword">if</strong> (stat == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="193" href="#193">193</a> zkc.create(parentZnode
<a class="jxr_linenumber" name="194" href="#194">194</a> + Constants.DEFAULT_ZOOKEEPER_ZNODE_SERVERS_RUNNING,
<a class="jxr_linenumber" name="195" href="#195">195</a> <strong class="jxr_keyword">new</strong> byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE,
<a class="jxr_linenumber" name="196" href="#196">196</a> CreateMode.PERSISTENT);
<a class="jxr_linenumber" name="197" href="#197">197</a> }
<a class="jxr_linenumber" name="198" href="#198">198</a> stat = zkc.exists(parentZnode
<a class="jxr_linenumber" name="199" href="#199">199</a> + Constants.DEFAULT_ZOOKEEPER_ZNODE_SERVERS_REGISTERED,
<a class="jxr_linenumber" name="200" href="#200">200</a> false);
<a class="jxr_linenumber" name="201" href="#201">201</a> <strong class="jxr_keyword">if</strong> (stat == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="202" href="#202">202</a> zkc.create(parentZnode
<a class="jxr_linenumber" name="203" href="#203">203</a> + Constants.DEFAULT_ZOOKEEPER_ZNODE_SERVERS_REGISTERED,
<a class="jxr_linenumber" name="204" href="#204">204</a> <strong class="jxr_keyword">new</strong> byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE,
<a class="jxr_linenumber" name="205" href="#205">205</a> CreateMode.PERSISTENT);
<a class="jxr_linenumber" name="206" href="#206">206</a> }
<a class="jxr_linenumber" name="207" href="#207">207</a> } <strong class="jxr_keyword">catch</strong> (KeeperException.NodeExistsException e) {
<a class="jxr_linenumber" name="208" href="#208">208</a> <em class="jxr_comment">// do nothing...some other server has created znodes</em>
<a class="jxr_linenumber" name="209" href="#209">209</a> } <strong class="jxr_keyword">catch</strong> (Exception e) {
<a class="jxr_linenumber" name="210" href="#210">210</a> LOG.error(e);
<a class="jxr_linenumber" name="211" href="#211">211</a> System.exit(0);
<a class="jxr_linenumber" name="212" href="#212">212</a> }
<a class="jxr_linenumber" name="213" href="#213">213</a>
<a class="jxr_linenumber" name="214" href="#214">214</a> metrics = <strong class="jxr_keyword">new</strong> <a href="../../../../org/trafodion/dcs/master/Metrics.html">Metrics</a>();
<a class="jxr_linenumber" name="215" href="#215">215</a> startTime = System.currentTimeMillis();
<a class="jxr_linenumber" name="216" href="#216">216</a>
<a class="jxr_linenumber" name="217" href="#217">217</a> <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="218" href="#218">218</a> netConf = <strong class="jxr_keyword">new</strong> <a href="../../../../org/trafodion/dcs/util/DcsNetworkConfiguration.html">DcsNetworkConfiguration</a>(conf);
<a class="jxr_linenumber" name="219" href="#219">219</a> serverName = netConf.getHostName();
<a class="jxr_linenumber" name="220" href="#220">220</a> <strong class="jxr_keyword">if</strong> (serverName == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="221" href="#221">221</a> LOG.error(<span class="jxr_string">"DNS Interface ["</span> + conf.get(Constants.DCS_DNS_INTERFACE, Constants.DEFAULT_DCS_DNS_INTERFACE)
<a class="jxr_linenumber" name="222" href="#222">222</a> + <span class="jxr_string">"] configured in dcs.site.xml is not found!"</span>);
<a class="jxr_linenumber" name="223" href="#223">223</a> System.exit(1);
<a class="jxr_linenumber" name="224" href="#224">224</a> }
<a class="jxr_linenumber" name="225" href="#225">225</a>
<a class="jxr_linenumber" name="226" href="#226">226</a> <em class="jxr_comment">// Wait to become the leader of all DcsMasters</em>
<a class="jxr_linenumber" name="227" href="#227">227</a> mle = <strong class="jxr_keyword">new</strong> <a href="../../../../org/trafodion/dcs/master/MasterLeaderElection.html">MasterLeaderElection</a>(<strong class="jxr_keyword">this</strong>);
<a class="jxr_linenumber" name="228" href="#228">228</a> isLeader.await();
<a class="jxr_linenumber" name="229" href="#229">229</a>
<a class="jxr_linenumber" name="230" href="#230">230</a> String path = parentZnode
<a class="jxr_linenumber" name="231" href="#231">231</a> + Constants.DEFAULT_ZOOKEEPER_ZNODE_MASTER + <span class="jxr_string">"/"</span>
<a class="jxr_linenumber" name="232" href="#232">232</a> + netConf.getHostName() + <span class="jxr_string">":"</span> + port + <span class="jxr_string">":"</span> + portRange
<a class="jxr_linenumber" name="233" href="#233">233</a> + <span class="jxr_string">":"</span> + startTime;
<a class="jxr_linenumber" name="234" href="#234">234</a> zkc.create(path, <strong class="jxr_keyword">new</strong> byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE,
<a class="jxr_linenumber" name="235" href="#235">235</a> CreateMode.EPHEMERAL);
<a class="jxr_linenumber" name="236" href="#236">236</a> LOG.info(<span class="jxr_string">"Created znode ["</span> + path + <span class="jxr_string">"]"</span>);
<a class="jxr_linenumber" name="237" href="#237">237</a>
<a class="jxr_linenumber" name="238" href="#238">238</a> <strong class="jxr_keyword">int</strong> requestTimeout = conf.getInt(
<a class="jxr_linenumber" name="239" href="#239">239</a> Constants.DCS_MASTER_LISTENER_REQUEST_TIMEOUT,
<a class="jxr_linenumber" name="240" href="#240">240</a> Constants.DEFAULT_LISTENER_REQUEST_TIMEOUT);
<a class="jxr_linenumber" name="241" href="#241">241</a> <strong class="jxr_keyword">int</strong> selectorTimeout = conf.getInt(
<a class="jxr_linenumber" name="242" href="#242">242</a> Constants.DCS_MASTER_LISTENER_SELECTOR_TIMEOUT,
<a class="jxr_linenumber" name="243" href="#243">243</a> Constants.DEFAULT_LISTENER_SELECTOR_TIMEOUT);
<a class="jxr_linenumber" name="244" href="#244">244</a> ls = <strong class="jxr_keyword">new</strong> <a href="../../../../org/trafodion/dcs/master/listener/ListenerService.html">ListenerService</a>(zkc, netConf, port, portRange,
<a class="jxr_linenumber" name="245" href="#245">245</a> requestTimeout, selectorTimeout, metrics, parentZnode);
<a class="jxr_linenumber" name="246" href="#246">246</a> LOG.info(<span class="jxr_string">"Listening for clients on port ["</span> + port + <span class="jxr_string">"]"</span>);
<a class="jxr_linenumber" name="247" href="#247">247</a> serverName = netConf.getHostName();
<a class="jxr_linenumber" name="248" href="#248">248</a>
<a class="jxr_linenumber" name="249" href="#249">249</a> <em class="jxr_comment">// Start the info server.</em>
<a class="jxr_linenumber" name="250" href="#250">250</a> infoPort = conf.getInt(Constants.DCS_MASTER_INFO_PORT,
<a class="jxr_linenumber" name="251" href="#251">251</a> Constants.DEFAULT_DCS_MASTER_INFO_PORT);
<a class="jxr_linenumber" name="252" href="#252">252</a> <strong class="jxr_keyword">if</strong> (infoPort &gt;= 0) {
<a class="jxr_linenumber" name="253" href="#253">253</a> String a = conf.get(Constants.DCS_MASTER_INFO_BIND_ADDRESS,
<a class="jxr_linenumber" name="254" href="#254">254</a> Constants.DEFAULT_DCS_MASTER_INFO_BIND_ADDRESS);
<a class="jxr_linenumber" name="255" href="#255">255</a> infoServer = <strong class="jxr_keyword">new</strong> <a href="../../../../org/trafodion/dcs/util/InfoServer.html">InfoServer</a>(MASTER, a, infoPort, false, conf);
<a class="jxr_linenumber" name="256" href="#256">256</a> infoServer.addServlet(<span class="jxr_string">"status"</span>, <span class="jxr_string">"/master-status"</span>,
<a class="jxr_linenumber" name="257" href="#257">257</a> MasterStatusServlet.<strong class="jxr_keyword">class</strong>);
<a class="jxr_linenumber" name="258" href="#258">258</a> infoServer.setAttribute(MASTER, <strong class="jxr_keyword">this</strong>);
<a class="jxr_linenumber" name="259" href="#259">259</a> infoServer.start();
<a class="jxr_linenumber" name="260" href="#260">260</a> }
<a class="jxr_linenumber" name="261" href="#261">261</a>
<a class="jxr_linenumber" name="262" href="#262">262</a> pool = Executors.newSingleThreadExecutor();
<a class="jxr_linenumber" name="263" href="#263">263</a> serverManager = <strong class="jxr_keyword">new</strong> <a href="../../../../org/trafodion/dcs/master/ServerManager.html">ServerManager</a>(<strong class="jxr_keyword">this</strong>, conf, zkc, netConf,
<a class="jxr_linenumber" name="264" href="#264">264</a> startTime, metrics);
<a class="jxr_linenumber" name="265" href="#265">265</a> Future future = pool.submit(serverManager);
<a class="jxr_linenumber" name="266" href="#266">266</a> future.get();<em class="jxr_comment">// block</em>
<a class="jxr_linenumber" name="267" href="#267">267</a>
<a class="jxr_linenumber" name="268" href="#268">268</a> } <strong class="jxr_keyword">catch</strong> (Exception e) {
<a class="jxr_linenumber" name="269" href="#269">269</a> LOG.error(e);
<a class="jxr_linenumber" name="270" href="#270">270</a> e.printStackTrace();
<a class="jxr_linenumber" name="271" href="#271">271</a> <strong class="jxr_keyword">if</strong> (pool != <strong class="jxr_keyword">null</strong>)
<a class="jxr_linenumber" name="272" href="#272">272</a> pool.shutdown();
<a class="jxr_linenumber" name="273" href="#273">273</a> System.exit(0);
<a class="jxr_linenumber" name="274" href="#274">274</a> }
<a class="jxr_linenumber" name="275" href="#275">275</a> }
<a class="jxr_linenumber" name="276" href="#276">276</a>
<a class="jxr_linenumber" name="277" href="#277">277</a> <strong class="jxr_keyword">public</strong> String getServerName() {
<a class="jxr_linenumber" name="278" href="#278">278</a> <strong class="jxr_keyword">return</strong> serverName;
<a class="jxr_linenumber" name="279" href="#279">279</a> }
<a class="jxr_linenumber" name="280" href="#280">280</a>
<a class="jxr_linenumber" name="281" href="#281">281</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> getInfoPort() {
<a class="jxr_linenumber" name="282" href="#282">282</a> <strong class="jxr_keyword">return</strong> infoPort;
<a class="jxr_linenumber" name="283" href="#283">283</a> }
<a class="jxr_linenumber" name="284" href="#284">284</a>
<a class="jxr_linenumber" name="285" href="#285">285</a> <strong class="jxr_keyword">public</strong> Configuration getConfiguration() {
<a class="jxr_linenumber" name="286" href="#286">286</a> <strong class="jxr_keyword">return</strong> conf;
<a class="jxr_linenumber" name="287" href="#287">287</a> }
<a class="jxr_linenumber" name="288" href="#288">288</a>
<a class="jxr_linenumber" name="289" href="#289">289</a> <strong class="jxr_keyword">public</strong> <a href="../../../../org/trafodion/dcs/master/ServerManager.html">ServerManager</a> getServerManager() {
<a class="jxr_linenumber" name="290" href="#290">290</a> <strong class="jxr_keyword">return</strong> serverManager;
<a class="jxr_linenumber" name="291" href="#291">291</a> }
<a class="jxr_linenumber" name="292" href="#292">292</a>
<a class="jxr_linenumber" name="293" href="#293">293</a> <strong class="jxr_keyword">public</strong> <a href="../../../../org/trafodion/dcs/master/listener/ListenerService.html">ListenerService</a> getListenerService() {
<a class="jxr_linenumber" name="294" href="#294">294</a> <strong class="jxr_keyword">return</strong> ls;
<a class="jxr_linenumber" name="295" href="#295">295</a> }
<a class="jxr_linenumber" name="296" href="#296">296</a>
<a class="jxr_linenumber" name="297" href="#297">297</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">long</strong> getStartTime() {
<a class="jxr_linenumber" name="298" href="#298">298</a> <strong class="jxr_keyword">return</strong> startTime;
<a class="jxr_linenumber" name="299" href="#299">299</a> }
<a class="jxr_linenumber" name="300" href="#300">300</a>
<a class="jxr_linenumber" name="301" href="#301">301</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> getPort() {
<a class="jxr_linenumber" name="302" href="#302">302</a> <strong class="jxr_keyword">return</strong> port;
<a class="jxr_linenumber" name="303" href="#303">303</a> }
<a class="jxr_linenumber" name="304" href="#304">304</a>
<a class="jxr_linenumber" name="305" href="#305">305</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> getPortRange() {
<a class="jxr_linenumber" name="306" href="#306">306</a> <strong class="jxr_keyword">return</strong> portRange;
<a class="jxr_linenumber" name="307" href="#307">307</a> }
<a class="jxr_linenumber" name="308" href="#308">308</a>
<a class="jxr_linenumber" name="309" href="#309">309</a> <strong class="jxr_keyword">public</strong> String getZKQuorumServersString() {
<a class="jxr_linenumber" name="310" href="#310">310</a> <strong class="jxr_keyword">return</strong> ZKConfig.getZKQuorumServersString(conf);
<a class="jxr_linenumber" name="311" href="#311">311</a> }
<a class="jxr_linenumber" name="312" href="#312">312</a>
<a class="jxr_linenumber" name="313" href="#313">313</a> <strong class="jxr_keyword">public</strong> String getZKParentZnode() {
<a class="jxr_linenumber" name="314" href="#314">314</a> <strong class="jxr_keyword">return</strong> parentZnode;
<a class="jxr_linenumber" name="315" href="#315">315</a> }
<a class="jxr_linenumber" name="316" href="#316">316</a>
<a class="jxr_linenumber" name="317" href="#317">317</a> <strong class="jxr_keyword">public</strong> String getMetrics() {
<a class="jxr_linenumber" name="318" href="#318">318</a> <strong class="jxr_keyword">return</strong> metrics.toString();
<a class="jxr_linenumber" name="319" href="#319">319</a> }
<a class="jxr_linenumber" name="320" href="#320">320</a>
<a class="jxr_linenumber" name="321" href="#321">321</a> <strong class="jxr_keyword">public</strong> String getTrafodionLog() {
<a class="jxr_linenumber" name="322" href="#322">322</a> <strong class="jxr_keyword">return</strong> trafodionLog;
<a class="jxr_linenumber" name="323" href="#323">323</a> }
<a class="jxr_linenumber" name="324" href="#324">324</a>
<a class="jxr_linenumber" name="325" href="#325">325</a> <strong class="jxr_keyword">public</strong> <a href="../../../../org/trafodion/dcs/zookeeper/ZkClient.html">ZkClient</a> getZkClient() {
<a class="jxr_linenumber" name="326" href="#326">326</a> <strong class="jxr_keyword">return</strong> zkc;
<a class="jxr_linenumber" name="327" href="#327">327</a> }
<a class="jxr_linenumber" name="328" href="#328">328</a>
<a class="jxr_linenumber" name="329" href="#329">329</a> <strong class="jxr_keyword">public</strong> String getInstance() {
<a class="jxr_linenumber" name="330" href="#330">330</a> <strong class="jxr_keyword">return</strong> instance;
<a class="jxr_linenumber" name="331" href="#331">331</a> }
<a class="jxr_linenumber" name="332" href="#332">332</a>
<a class="jxr_linenumber" name="333" href="#333">333</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isFollower() {
<a class="jxr_linenumber" name="334" href="#334">334</a> <strong class="jxr_keyword">return</strong> mle.isFollower();
<a class="jxr_linenumber" name="335" href="#335">335</a> }
<a class="jxr_linenumber" name="336" href="#336">336</a>
<a class="jxr_linenumber" name="337" href="#337">337</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> setIsLeader() {
<a class="jxr_linenumber" name="338" href="#338">338</a> isLeader.countDown();
<a class="jxr_linenumber" name="339" href="#339">339</a> }
<a class="jxr_linenumber" name="340" href="#340">340</a>
<a class="jxr_linenumber" name="341" href="#341">341</a> <strong class="jxr_keyword">public</strong> <a href="../../../../org/trafodion/dcs/util/DcsNetworkConfiguration.html">DcsNetworkConfiguration</a> getNetConf() {
<a class="jxr_linenumber" name="342" href="#342">342</a> <strong class="jxr_keyword">return</strong> netConf;
<a class="jxr_linenumber" name="343" href="#343">343</a> }
<a class="jxr_linenumber" name="344" href="#344">344</a>
<a class="jxr_linenumber" name="345" href="#345">345</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> main(String[] args) {
<a class="jxr_linenumber" name="346" href="#346">346</a> <a href="../../../../org/trafodion/dcs/master/DcsMaster.html">DcsMaster</a> server = <strong class="jxr_keyword">new</strong> <a href="../../../../org/trafodion/dcs/master/DcsMaster.html">DcsMaster</a>(args);
<a class="jxr_linenumber" name="347" href="#347">347</a> }
<a class="jxr_linenumber" name="348" href="#348">348</a> }
</pre>
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