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From ka...@apache.org
Subject svn commit: r1544749 [22/23] - in /incubator/helix/site-content: ./ apidocs/reference/org/apache/helix/manager/zk/ helix-admin-webapp/ helix-agent/ helix-core/ helix-examples/ images/ involved/ recipes/ recipes/distributed-lock-manager/ recipes/rabbitm...
Date Sat, 23 Nov 2013 07:11:30 GMT
Added: incubator/helix/site-content/xref/org/apache/helix/manager/zk/AbstractManager.html
URL: http://svn.apache.org/viewvc/incubator/helix/site-content/xref/org/apache/helix/manager/zk/AbstractManager.html?rev=1544749&view=auto
==============================================================================
--- incubator/helix/site-content/xref/org/apache/helix/manager/zk/AbstractManager.html (added)
+++ incubator/helix/site-content/xref/org/apache/helix/manager/zk/AbstractManager.html Sat Nov 23 07:11:13 2013
@@ -0,0 +1,704 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head>
+<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
+<title>AbstractManager xref</title>
+<link type="text/css" rel="stylesheet" href="../../../../../stylesheet.css" />
+</head>
+<body>
+<div id="overview"><a href="../../../../../../apidocs/org/apache/helix/manager/zk/AbstractManager.html">View Javadoc</a></div><pre>
+
+<a class="jxr_linenumber" name="1" href="#1">1</a>   <strong class="jxr_keyword">package</strong> org.apache.helix.manager.zk;
+<a class="jxr_linenumber" name="2" href="#2">2</a>   
+<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment">/*</em>
+<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one</em>
+<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * or more contributor license agreements.  See the NOTICE file</em>
+<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * distributed with this work for additional information</em>
+<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> * regarding copyright ownership.  The ASF licenses this file</em>
+<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> * to you under the Apache License, Version 2.0 (the</em>
+<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> * "License"); you may not use this file except in compliance</em>
+<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * with the License.  You may obtain a copy of the License at</em>
+<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> *</em>
+<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> *   <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>  <em class="jxr_comment"> *</em>
+<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing,</em>
+<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> * software distributed under the License is distributed on an</em>
+<a class="jxr_linenumber" name="16" href="#16">16</a>  <em class="jxr_comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em>
+<a class="jxr_linenumber" name="17" href="#17">17</a>  <em class="jxr_comment"> * KIND, either express or implied.  See the License for the</em>
+<a class="jxr_linenumber" name="18" href="#18">18</a>  <em class="jxr_comment"> * specific language governing permissions and limitations</em>
+<a class="jxr_linenumber" name="19" href="#19">19</a>  <em class="jxr_comment"> * under the License.</em>
+<a class="jxr_linenumber" name="20" href="#20">20</a>  <em class="jxr_comment"> */</em>
+<a class="jxr_linenumber" name="21" href="#21">21</a>  
+<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> java.util.ArrayList;
+<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> java.util.LinkedList;
+<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> java.util.List;
+<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.TimeUnit;
+<a class="jxr_linenumber" name="26" href="#26">26</a>  
+<a class="jxr_linenumber" name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> org.I0Itec.zkclient.IZkStateListener;
+<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> org.I0Itec.zkclient.ZkConnection;
+<a class="jxr_linenumber" name="29" href="#29">29</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.BaseDataAccessor;
+<a class="jxr_linenumber" name="30" href="#30">30</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.ClusterMessagingService;
+<a class="jxr_linenumber" name="31" href="#31">31</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.ConfigAccessor;
+<a class="jxr_linenumber" name="32" href="#32">32</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.ConfigChangeListener;
+<a class="jxr_linenumber" name="33" href="#33">33</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.ControllerChangeListener;
+<a class="jxr_linenumber" name="34" href="#34">34</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.CurrentStateChangeListener;
+<a class="jxr_linenumber" name="35" href="#35">35</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.ExternalViewChangeListener;
+<a class="jxr_linenumber" name="36" href="#36">36</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.HealthStateChangeListener;
+<a class="jxr_linenumber" name="37" href="#37">37</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.HelixAdmin;
+<a class="jxr_linenumber" name="38" href="#38">38</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.HelixConstants.ChangeType;
+<a class="jxr_linenumber" name="39" href="#39">39</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.HelixDataAccessor;
+<a class="jxr_linenumber" name="40" href="#40">40</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.HelixException;
+<a class="jxr_linenumber" name="41" href="#41">41</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.HelixManager;
+<a class="jxr_linenumber" name="42" href="#42">42</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.HelixManagerProperties;
+<a class="jxr_linenumber" name="43" href="#43">43</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.HelixTimerTask;
+<a class="jxr_linenumber" name="44" href="#44">44</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.IdealStateChangeListener;
+<a class="jxr_linenumber" name="45" href="#45">45</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.InstanceConfigChangeListener;
+<a class="jxr_linenumber" name="46" href="#46">46</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.InstanceType;
+<a class="jxr_linenumber" name="47" href="#47">47</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.LiveInstanceChangeListener;
+<a class="jxr_linenumber" name="48" href="#48">48</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.LiveInstanceInfoProvider;
+<a class="jxr_linenumber" name="49" href="#49">49</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.MessageListener;
+<a class="jxr_linenumber" name="50" href="#50">50</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.PreConnectCallback;
+<a class="jxr_linenumber" name="51" href="#51">51</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.PropertyKey;
+<a class="jxr_linenumber" name="52" href="#52">52</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.PropertyKey.Builder;
+<a class="jxr_linenumber" name="53" href="#53">53</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.PropertyPathConfig;
+<a class="jxr_linenumber" name="54" href="#54">54</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.PropertyType;
+<a class="jxr_linenumber" name="55" href="#55">55</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.ScopedConfigChangeListener;
+<a class="jxr_linenumber" name="56" href="#56">56</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.ZNRecord;
+<a class="jxr_linenumber" name="57" href="#57">57</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.healthcheck.ParticipantHealthReportCollector;
+<a class="jxr_linenumber" name="58" href="#58">58</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.messaging.DefaultMessagingService;
+<a class="jxr_linenumber" name="59" href="#59">59</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.HelixConfigScope.ConfigScopeProperty;
+<a class="jxr_linenumber" name="60" href="#60">60</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.participant.StateMachineEngine;
+<a class="jxr_linenumber" name="61" href="#61">61</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.store.zk.ZkHelixPropertyStore;
+<a class="jxr_linenumber" name="62" href="#62">62</a>  <strong class="jxr_keyword">import</strong> org.apache.log4j.Logger;
+<a class="jxr_linenumber" name="63" href="#63">63</a>  <strong class="jxr_keyword">import</strong> org.apache.zookeeper.Watcher.Event.EventType;
+<a class="jxr_linenumber" name="64" href="#64">64</a>  <strong class="jxr_keyword">import</strong> org.apache.zookeeper.Watcher.Event.KeeperState;
+<a class="jxr_linenumber" name="65" href="#65">65</a>  <strong class="jxr_keyword">import</strong> org.apache.zookeeper.ZooKeeper.States;
+<a class="jxr_linenumber" name="66" href="#66">66</a>  
+<a class="jxr_linenumber" name="67" href="#67">67</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/apache/helix/manager/zk/AbstractManager.html">AbstractManager</a> <strong class="jxr_keyword">implements</strong> HelixManager, IZkStateListener {
+<a class="jxr_linenumber" name="68" href="#68">68</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> Logger LOG = Logger.getLogger(AbstractManager.<strong class="jxr_keyword">class</strong>);
+<a class="jxr_linenumber" name="69" href="#69">69</a>  
+<a class="jxr_linenumber" name="70" href="#70">70</a>    <strong class="jxr_keyword">final</strong> String _zkAddress;
+<a class="jxr_linenumber" name="71" href="#71">71</a>    <strong class="jxr_keyword">final</strong> String _clusterName;
+<a class="jxr_linenumber" name="72" href="#72">72</a>    <strong class="jxr_keyword">final</strong> String _instanceName;
+<a class="jxr_linenumber" name="73" href="#73">73</a>    <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/helix/InstanceType.html">InstanceType</a> _instanceType;
+<a class="jxr_linenumber" name="74" href="#74">74</a>    <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> _sessionTimeout;
+<a class="jxr_linenumber" name="75" href="#75">75</a>    <strong class="jxr_keyword">final</strong> List&lt;PreConnectCallback&gt; _preConnectCallbacks;
+<a class="jxr_linenumber" name="76" href="#76">76</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> List&lt;CallbackHandler&gt; _handlers;
+<a class="jxr_linenumber" name="77" href="#77">77</a>    <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/helix/HelixManagerProperties.html">HelixManagerProperties</a> _properties;
+<a class="jxr_linenumber" name="78" href="#78">78</a>  
+<a class="jxr_linenumber" name="79" href="#79">79</a>    <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="80" href="#80">80</a>  <em class="jxr_javadoccomment">   * helix version#</em>
+<a class="jxr_linenumber" name="81" href="#81">81</a>  <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="82" href="#82">82</a>    <strong class="jxr_keyword">final</strong> String _version;
+<a class="jxr_linenumber" name="83" href="#83">83</a>  
+<a class="jxr_linenumber" name="84" href="#84">84</a>    <strong class="jxr_keyword">protected</strong> <a href="../../../../../org/apache/helix/manager/zk/ZkClient.html">ZkClient</a> _zkclient = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="85" href="#85">85</a>    <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/helix/messaging/DefaultMessagingService.html">DefaultMessagingService</a> _messagingService;
+<a class="jxr_linenumber" name="86" href="#86">86</a>  
+<a class="jxr_linenumber" name="87" href="#87">87</a>    BaseDataAccessor&lt;ZNRecord&gt; _baseDataAccessor;
+<a class="jxr_linenumber" name="88" href="#88">88</a>    <a href="../../../../../org/apache/helix/manager/zk/ZKHelixDataAccessor.html">ZKHelixDataAccessor</a> _dataAccessor;
+<a class="jxr_linenumber" name="89" href="#89">89</a>    <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/helix/PropertyKey.html">Builder</a> _keyBuilder;
+<a class="jxr_linenumber" name="90" href="#90">90</a>    <a href="../../../../../org/apache/helix/ConfigAccessor.html">ConfigAccessor</a> _configAccessor;
+<a class="jxr_linenumber" name="91" href="#91">91</a>    ZkHelixPropertyStore&lt;ZNRecord&gt; _helixPropertyStore;
+<a class="jxr_linenumber" name="92" href="#92">92</a>    <a href="../../../../../org/apache/helix/LiveInstanceInfoProvider.html">LiveInstanceInfoProvider</a> _liveInstanceInfoProvider = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="93" href="#93">93</a>    <strong class="jxr_keyword">final</strong> List&lt;HelixTimerTask&gt; _timerTasks = <strong class="jxr_keyword">new</strong> ArrayList&lt;HelixTimerTask&gt;();
+<a class="jxr_linenumber" name="94" href="#94">94</a>  
+<a class="jxr_linenumber" name="95" href="#95">95</a>    <strong class="jxr_keyword">volatile</strong> String _sessionId;
+<a class="jxr_linenumber" name="96" href="#96">96</a>  
+<a class="jxr_linenumber" name="97" href="#97">97</a>    <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="98" href="#98">98</a>  <em class="jxr_javadoccomment">   * Keep track of timestamps that zk State has become Disconnected</em>
+<a class="jxr_linenumber" name="99" href="#99">99</a>  <em class="jxr_javadoccomment">   * If in a _timeWindowLengthMs window zk State has become Disconnected</em>
+<a class="jxr_linenumber" name="100" href="#100">100</a> <em class="jxr_javadoccomment">   * for more than_maxDisconnectThreshold times disconnect the zkHelixManager</em>
+<a class="jxr_linenumber" name="101" href="#101">101</a> <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="102" href="#102">102</a>   <strong class="jxr_keyword">final</strong> List&lt;Long&gt; _disconnectTimeHistory = <strong class="jxr_keyword">new</strong> LinkedList&lt;Long&gt;();
+<a class="jxr_linenumber" name="103" href="#103">103</a> 
+<a class="jxr_linenumber" name="104" href="#104">104</a>   <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> _flappingTimeWindowMs;
+<a class="jxr_linenumber" name="105" href="#105">105</a>   <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> _maxDisconnectThreshold;
+<a class="jxr_linenumber" name="106" href="#106">106</a> 
+<a class="jxr_linenumber" name="107" href="#107">107</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/helix/manager/zk/AbstractManager.html">AbstractManager</a>(String zkAddress, String clusterName, String instanceName,
+<a class="jxr_linenumber" name="108" href="#108">108</a>       <a href="../../../../../org/apache/helix/InstanceType.html">InstanceType</a> instanceType) {
+<a class="jxr_linenumber" name="109" href="#109">109</a> 
+<a class="jxr_linenumber" name="110" href="#110">110</a>     LOG.info(<span class="jxr_string">"Create a zk-based cluster manager. zkSvr: "</span> + zkAddress + <span class="jxr_string">", clusterName: "</span>
+<a class="jxr_linenumber" name="111" href="#111">111</a>         + clusterName + <span class="jxr_string">", instanceName: "</span> + instanceName + <span class="jxr_string">", type: "</span> + instanceType);
+<a class="jxr_linenumber" name="112" href="#112">112</a> 
+<a class="jxr_linenumber" name="113" href="#113">113</a>     _zkAddress = zkAddress;
+<a class="jxr_linenumber" name="114" href="#114">114</a>     _clusterName = clusterName;
+<a class="jxr_linenumber" name="115" href="#115">115</a>     _instanceType = instanceType;
+<a class="jxr_linenumber" name="116" href="#116">116</a>     _instanceName = instanceName;
+<a class="jxr_linenumber" name="117" href="#117">117</a>     _preConnectCallbacks = <strong class="jxr_keyword">new</strong> LinkedList&lt;PreConnectCallback&gt;();
+<a class="jxr_linenumber" name="118" href="#118">118</a>     _handlers = <strong class="jxr_keyword">new</strong> ArrayList&lt;CallbackHandler&gt;();
+<a class="jxr_linenumber" name="119" href="#119">119</a>     _properties = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/HelixManagerProperties.html">HelixManagerProperties</a>(<span class="jxr_string">"cluster-manager-version.properties"</span>);
+<a class="jxr_linenumber" name="120" href="#120">120</a>     _version = _properties.getVersion();
+<a class="jxr_linenumber" name="121" href="#121">121</a> 
+<a class="jxr_linenumber" name="122" href="#122">122</a>     _keyBuilder = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/PropertyKey.html">Builder</a>(clusterName);
+<a class="jxr_linenumber" name="123" href="#123">123</a>     _messagingService = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/messaging/DefaultMessagingService.html">DefaultMessagingService</a>(<strong class="jxr_keyword">this</strong>);
+<a class="jxr_linenumber" name="124" href="#124">124</a> 
+<a class="jxr_linenumber" name="125" href="#125">125</a>     <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="126" href="#126">126</a> <em class="jxr_javadoccomment">     * use system property if available</em>
+<a class="jxr_linenumber" name="127" href="#127">127</a> <em class="jxr_javadoccomment">     */</em>
+<a class="jxr_linenumber" name="128" href="#128">128</a>     _flappingTimeWindowMs =
+<a class="jxr_linenumber" name="129" href="#129">129</a>         getSystemPropertyAsInt(<span class="jxr_string">"helixmanager.flappingTimeWindow"</span>,
+<a class="jxr_linenumber" name="130" href="#130">130</a>             ZKHelixManager.FLAPPING_TIME_WINDIOW);
+<a class="jxr_linenumber" name="131" href="#131">131</a> 
+<a class="jxr_linenumber" name="132" href="#132">132</a>     _maxDisconnectThreshold =
+<a class="jxr_linenumber" name="133" href="#133">133</a>         getSystemPropertyAsInt(<span class="jxr_string">"helixmanager.maxDisconnectThreshold"</span>,
+<a class="jxr_linenumber" name="134" href="#134">134</a>             ZKHelixManager.MAX_DISCONNECT_THRESHOLD);
+<a class="jxr_linenumber" name="135" href="#135">135</a> 
+<a class="jxr_linenumber" name="136" href="#136">136</a>     _sessionTimeout =
+<a class="jxr_linenumber" name="137" href="#137">137</a>         getSystemPropertyAsInt(<span class="jxr_string">"zk.session.timeout"</span>, ZkClient.DEFAULT_SESSION_TIMEOUT);
+<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> 
+<a class="jxr_linenumber" name="141" href="#141">141</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> getSystemPropertyAsInt(String propertyKey, <strong class="jxr_keyword">int</strong> propertyDefaultValue) {
+<a class="jxr_linenumber" name="142" href="#142">142</a>     String valueString = System.getProperty(propertyKey, <span class="jxr_string">""</span> + propertyDefaultValue);
+<a class="jxr_linenumber" name="143" href="#143">143</a> 
+<a class="jxr_linenumber" name="144" href="#144">144</a>     <strong class="jxr_keyword">try</strong> {
+<a class="jxr_linenumber" name="145" href="#145">145</a>       <strong class="jxr_keyword">int</strong> value = Integer.parseInt(valueString);
+<a class="jxr_linenumber" name="146" href="#146">146</a>       <strong class="jxr_keyword">if</strong> (value &gt; 0) {
+<a class="jxr_linenumber" name="147" href="#147">147</a>         <strong class="jxr_keyword">return</strong> value;
+<a class="jxr_linenumber" name="148" href="#148">148</a>       }
+<a class="jxr_linenumber" name="149" href="#149">149</a>     } <strong class="jxr_keyword">catch</strong> (NumberFormatException e) {
+<a class="jxr_linenumber" name="150" href="#150">150</a>       LOG.warn(<span class="jxr_string">"Exception while parsing property: "</span> + propertyKey + <span class="jxr_string">", string: "</span> + valueString
+<a class="jxr_linenumber" name="151" href="#151">151</a>           + <span class="jxr_string">", using default value: "</span> + propertyDefaultValue);
+<a class="jxr_linenumber" name="152" href="#152">152</a>     }
+<a class="jxr_linenumber" name="153" href="#153">153</a> 
+<a class="jxr_linenumber" name="154" href="#154">154</a>     <strong class="jxr_keyword">return</strong> propertyDefaultValue;
+<a class="jxr_linenumber" name="155" href="#155">155</a>   }
+<a class="jxr_linenumber" name="156" href="#156">156</a> 
+<a class="jxr_linenumber" name="157" href="#157">157</a>   <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="158" href="#158">158</a> <em class="jxr_javadoccomment">   * different types of helix manager should impl its own handle new session logic</em>
+<a class="jxr_linenumber" name="159" href="#159">159</a> <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="160" href="#160">160</a>   <em class="jxr_comment">// public abstract void handleNewSession();</em>
+<a class="jxr_linenumber" name="161" href="#161">161</a> 
+<a class="jxr_linenumber" name="162" href="#162">162</a>   @Override
+<a class="jxr_linenumber" name="163" href="#163">163</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> connect() <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="164" href="#164">164</a>     LOG.info(<span class="jxr_string">"ClusterManager.connect()"</span>);
+<a class="jxr_linenumber" name="165" href="#165">165</a>     <strong class="jxr_keyword">if</strong> (isConnected()) {
+<a class="jxr_linenumber" name="166" href="#166">166</a>       LOG.warn(<span class="jxr_string">"Cluster manager: "</span> + _instanceName + <span class="jxr_string">" for cluster: "</span> + _clusterName
+<a class="jxr_linenumber" name="167" href="#167">167</a>           + <span class="jxr_string">" already connected. skip connect"</span>);
+<a class="jxr_linenumber" name="168" href="#168">168</a>       <strong class="jxr_keyword">return</strong>;
+<a class="jxr_linenumber" name="169" href="#169">169</a>     }
+<a class="jxr_linenumber" name="170" href="#170">170</a> 
+<a class="jxr_linenumber" name="171" href="#171">171</a>     <strong class="jxr_keyword">try</strong> {
+<a class="jxr_linenumber" name="172" href="#172">172</a>       createClient();
+<a class="jxr_linenumber" name="173" href="#173">173</a>       _messagingService.onConnected();
+<a class="jxr_linenumber" name="174" href="#174">174</a>     } <strong class="jxr_keyword">catch</strong> (Exception e) {
+<a class="jxr_linenumber" name="175" href="#175">175</a>       LOG.error(<span class="jxr_string">"fail to connect "</span> + _instanceName, e);
+<a class="jxr_linenumber" name="176" href="#176">176</a>       disconnect();
+<a class="jxr_linenumber" name="177" href="#177">177</a>       <strong class="jxr_keyword">throw</strong> e;
+<a class="jxr_linenumber" name="178" href="#178">178</a>     }
+<a class="jxr_linenumber" name="179" href="#179">179</a>   }
+<a class="jxr_linenumber" name="180" href="#180">180</a> 
+<a class="jxr_linenumber" name="181" href="#181">181</a>   @Override
+<a class="jxr_linenumber" name="182" href="#182">182</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isConnected() {
+<a class="jxr_linenumber" name="183" href="#183">183</a>     <strong class="jxr_keyword">if</strong> (_zkclient == <strong class="jxr_keyword">null</strong>) {
+<a class="jxr_linenumber" name="184" href="#184">184</a>       <strong class="jxr_keyword">return</strong> false;
+<a class="jxr_linenumber" name="185" href="#185">185</a>     }
+<a class="jxr_linenumber" name="186" href="#186">186</a>     ZkConnection zkconnection = (ZkConnection) _zkclient.getConnection();
+<a class="jxr_linenumber" name="187" href="#187">187</a>     <strong class="jxr_keyword">if</strong> (zkconnection != <strong class="jxr_keyword">null</strong>) {
+<a class="jxr_linenumber" name="188" href="#188">188</a>       States state = zkconnection.getZookeeperState();
+<a class="jxr_linenumber" name="189" href="#189">189</a>       <strong class="jxr_keyword">return</strong> state == States.CONNECTED;
+<a class="jxr_linenumber" name="190" href="#190">190</a>     }
+<a class="jxr_linenumber" name="191" href="#191">191</a>     <strong class="jxr_keyword">return</strong> false;
+<a class="jxr_linenumber" name="192" href="#192">192</a>   }
+<a class="jxr_linenumber" name="193" href="#193">193</a> 
+<a class="jxr_linenumber" name="194" href="#194">194</a>   <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="195" href="#195">195</a> <em class="jxr_javadoccomment">   * specific disconnect logic for each helix-manager type</em>
+<a class="jxr_linenumber" name="196" href="#196">196</a> <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="197" href="#197">197</a>   <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">void</strong> doDisconnect();
+<a class="jxr_linenumber" name="198" href="#198">198</a> 
+<a class="jxr_linenumber" name="199" href="#199">199</a>   <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="200" href="#200">200</a> <em class="jxr_javadoccomment">   * This function can be called when the connection are in bad state(e.g. flapping),</em>
+<a class="jxr_linenumber" name="201" href="#201">201</a> <em class="jxr_javadoccomment">   * in which isConnected() could be false and we want to disconnect from cluster.</em>
+<a class="jxr_linenumber" name="202" href="#202">202</a> <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="203" href="#203">203</a>   @Override
+<a class="jxr_linenumber" name="204" href="#204">204</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> disconnect() {
+<a class="jxr_linenumber" name="205" href="#205">205</a>     LOG.info(<span class="jxr_string">"disconnect "</span> + _instanceName + <span class="jxr_string">"("</span> + _instanceType + <span class="jxr_string">") from "</span> + _clusterName);
+<a class="jxr_linenumber" name="206" href="#206">206</a> 
+<a class="jxr_linenumber" name="207" href="#207">207</a>     <strong class="jxr_keyword">try</strong> {
+<a class="jxr_linenumber" name="208" href="#208">208</a>       <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="209" href="#209">209</a> <em class="jxr_javadoccomment">       * stop all timer tasks</em>
+<a class="jxr_linenumber" name="210" href="#210">210</a> <em class="jxr_javadoccomment">       */</em>
+<a class="jxr_linenumber" name="211" href="#211">211</a>       stopTimerTasks();
+<a class="jxr_linenumber" name="212" href="#212">212</a> 
+<a class="jxr_linenumber" name="213" href="#213">213</a>       <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="214" href="#214">214</a> <em class="jxr_javadoccomment">       * shutdown thread pool first to avoid reset() being invoked in the middle of state</em>
+<a class="jxr_linenumber" name="215" href="#215">215</a> <em class="jxr_javadoccomment">       * transition</em>
+<a class="jxr_linenumber" name="216" href="#216">216</a> <em class="jxr_javadoccomment">       */</em>
+<a class="jxr_linenumber" name="217" href="#217">217</a>       _messagingService.getExecutor().shutdown();
+<a class="jxr_linenumber" name="218" href="#218">218</a> 
+<a class="jxr_linenumber" name="219" href="#219">219</a>       <em class="jxr_comment">// TODO reset user defined handlers only</em>
+<a class="jxr_linenumber" name="220" href="#220">220</a>       resetHandlers();
+<a class="jxr_linenumber" name="221" href="#221">221</a> 
+<a class="jxr_linenumber" name="222" href="#222">222</a>       _dataAccessor.shutdown();
+<a class="jxr_linenumber" name="223" href="#223">223</a> 
+<a class="jxr_linenumber" name="224" href="#224">224</a>       doDisconnect();
+<a class="jxr_linenumber" name="225" href="#225">225</a> 
+<a class="jxr_linenumber" name="226" href="#226">226</a>       _zkclient.unsubscribeAll();
+<a class="jxr_linenumber" name="227" href="#227">227</a>     } <strong class="jxr_keyword">finally</strong> {
+<a class="jxr_linenumber" name="228" href="#228">228</a>       _zkclient.close();
+<a class="jxr_linenumber" name="229" href="#229">229</a>       LOG.info(<span class="jxr_string">"Cluster manager: "</span> + _instanceName + <span class="jxr_string">" disconnected"</span>);
+<a class="jxr_linenumber" name="230" href="#230">230</a>     }
+<a class="jxr_linenumber" name="231" href="#231">231</a>   }
+<a class="jxr_linenumber" name="232" href="#232">232</a> 
+<a class="jxr_linenumber" name="233" href="#233">233</a>   @Override
+<a class="jxr_linenumber" name="234" href="#234">234</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> addIdealStateChangeListener(<a href="../../../../../org/apache/helix/IdealStateChangeListener.html">IdealStateChangeListener</a> listener) <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="235" href="#235">235</a>     addListener(listener, <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/PropertyKey.html">Builder</a>(_clusterName).idealStates(), ChangeType.IDEAL_STATE,
+<a class="jxr_linenumber" name="236" href="#236">236</a>         <strong class="jxr_keyword">new</strong> EventType[] {
+<a class="jxr_linenumber" name="237" href="#237">237</a>             EventType.NodeDataChanged, EventType.NodeDeleted, EventType.NodeCreated
+<a class="jxr_linenumber" name="238" href="#238">238</a>         });
+<a class="jxr_linenumber" name="239" href="#239">239</a>   }
+<a class="jxr_linenumber" name="240" href="#240">240</a> 
+<a class="jxr_linenumber" name="241" href="#241">241</a>   @Override
+<a class="jxr_linenumber" name="242" href="#242">242</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> addLiveInstanceChangeListener(<a href="../../../../../org/apache/helix/LiveInstanceChangeListener.html">LiveInstanceChangeListener</a> listener) <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="243" href="#243">243</a>     addListener(listener, <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/PropertyKey.html">Builder</a>(_clusterName).liveInstances(), ChangeType.LIVE_INSTANCE,
+<a class="jxr_linenumber" name="244" href="#244">244</a>         <strong class="jxr_keyword">new</strong> EventType[] {
+<a class="jxr_linenumber" name="245" href="#245">245</a>             EventType.NodeDataChanged, EventType.NodeChildrenChanged, EventType.NodeDeleted,
+<a class="jxr_linenumber" name="246" href="#246">246</a>             EventType.NodeCreated
+<a class="jxr_linenumber" name="247" href="#247">247</a>         });
+<a class="jxr_linenumber" name="248" href="#248">248</a>   }
+<a class="jxr_linenumber" name="249" href="#249">249</a> 
+<a class="jxr_linenumber" name="250" href="#250">250</a>   @Override
+<a class="jxr_linenumber" name="251" href="#251">251</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> addConfigChangeListener(<a href="../../../../../org/apache/helix/ConfigChangeListener.html">ConfigChangeListener</a> listener) <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="252" href="#252">252</a>     addListener(listener, <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/PropertyKey.html">Builder</a>(_clusterName).instanceConfigs(), ChangeType.INSTANCE_CONFIG,
+<a class="jxr_linenumber" name="253" href="#253">253</a>         <strong class="jxr_keyword">new</strong> EventType[] {
+<a class="jxr_linenumber" name="254" href="#254">254</a>           EventType.NodeChildrenChanged
+<a class="jxr_linenumber" name="255" href="#255">255</a>         });
+<a class="jxr_linenumber" name="256" href="#256">256</a>   }
+<a class="jxr_linenumber" name="257" href="#257">257</a> 
+<a class="jxr_linenumber" name="258" href="#258">258</a>   @Override
+<a class="jxr_linenumber" name="259" href="#259">259</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> addInstanceConfigChangeListener(<a href="../../../../../org/apache/helix/InstanceConfigChangeListener.html">InstanceConfigChangeListener</a> listener)
+<a class="jxr_linenumber" name="260" href="#260">260</a>       <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="261" href="#261">261</a>     addListener(listener, <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/PropertyKey.html">Builder</a>(_clusterName).instanceConfigs(), ChangeType.INSTANCE_CONFIG,
+<a class="jxr_linenumber" name="262" href="#262">262</a>         <strong class="jxr_keyword">new</strong> EventType[] {
+<a class="jxr_linenumber" name="263" href="#263">263</a>           EventType.NodeChildrenChanged
+<a class="jxr_linenumber" name="264" href="#264">264</a>         });
+<a class="jxr_linenumber" name="265" href="#265">265</a>   }
+<a class="jxr_linenumber" name="266" href="#266">266</a> 
+<a class="jxr_linenumber" name="267" href="#267">267</a>   @Override
+<a class="jxr_linenumber" name="268" href="#268">268</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> addConfigChangeListener(<a href="../../../../../org/apache/helix/ScopedConfigChangeListener.html">ScopedConfigChangeListener</a> listener, ConfigScopeProperty scope)
+<a class="jxr_linenumber" name="269" href="#269">269</a>       <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="270" href="#270">270</a>     <a href="../../../../../org/apache/helix/PropertyKey.html">Builder</a> keyBuilder = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/PropertyKey.html">Builder</a>(_clusterName);
+<a class="jxr_linenumber" name="271" href="#271">271</a> 
+<a class="jxr_linenumber" name="272" href="#272">272</a>     <a href="../../../../../org/apache/helix/PropertyKey.html">PropertyKey</a> propertyKey = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="273" href="#273">273</a>     <strong class="jxr_keyword">switch</strong> (scope) {
+<a class="jxr_linenumber" name="274" href="#274">274</a>     <strong class="jxr_keyword">case</strong> CLUSTER:
+<a class="jxr_linenumber" name="275" href="#275">275</a>       propertyKey = keyBuilder.clusterConfigs();
+<a class="jxr_linenumber" name="276" href="#276">276</a>       <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="277" href="#277">277</a>     <strong class="jxr_keyword">case</strong> PARTICIPANT:
+<a class="jxr_linenumber" name="278" href="#278">278</a>       propertyKey = keyBuilder.instanceConfigs();
+<a class="jxr_linenumber" name="279" href="#279">279</a>       <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="280" href="#280">280</a>     <strong class="jxr_keyword">case</strong> RESOURCE:
+<a class="jxr_linenumber" name="281" href="#281">281</a>       propertyKey = keyBuilder.resourceConfigs();
+<a class="jxr_linenumber" name="282" href="#282">282</a>       <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="283" href="#283">283</a>     <strong class="jxr_keyword">default</strong>:
+<a class="jxr_linenumber" name="284" href="#284">284</a>       <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="285" href="#285">285</a>     }
+<a class="jxr_linenumber" name="286" href="#286">286</a> 
+<a class="jxr_linenumber" name="287" href="#287">287</a>     <strong class="jxr_keyword">if</strong> (propertyKey != <strong class="jxr_keyword">null</strong>) {
+<a class="jxr_linenumber" name="288" href="#288">288</a>       addListener(listener, propertyKey, ChangeType.CONFIG, <strong class="jxr_keyword">new</strong> EventType[] {
+<a class="jxr_linenumber" name="289" href="#289">289</a>         EventType.NodeChildrenChanged
+<a class="jxr_linenumber" name="290" href="#290">290</a>       });
+<a class="jxr_linenumber" name="291" href="#291">291</a>     } <strong class="jxr_keyword">else</strong> {
+<a class="jxr_linenumber" name="292" href="#292">292</a>       LOG.error(<span class="jxr_string">"Can't add listener to config scope: "</span> + scope);
+<a class="jxr_linenumber" name="293" href="#293">293</a>     }
+<a class="jxr_linenumber" name="294" href="#294">294</a>   }
+<a class="jxr_linenumber" name="295" href="#295">295</a> 
+<a class="jxr_linenumber" name="296" href="#296">296</a>   @Override
+<a class="jxr_linenumber" name="297" href="#297">297</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> addMessageListener(<a href="../../../../../org/apache/helix/MessageListener.html">MessageListener</a> listener, String instanceName) {
+<a class="jxr_linenumber" name="298" href="#298">298</a>     addListener(listener, <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/PropertyKey.html">Builder</a>(_clusterName).messages(instanceName), ChangeType.MESSAGE,
+<a class="jxr_linenumber" name="299" href="#299">299</a>         <strong class="jxr_keyword">new</strong> EventType[] {
+<a class="jxr_linenumber" name="300" href="#300">300</a>             EventType.NodeChildrenChanged, EventType.NodeDeleted, EventType.NodeCreated
+<a class="jxr_linenumber" name="301" href="#301">301</a>         });
+<a class="jxr_linenumber" name="302" href="#302">302</a>   }
+<a class="jxr_linenumber" name="303" href="#303">303</a> 
+<a class="jxr_linenumber" name="304" href="#304">304</a>   @Override
+<a class="jxr_linenumber" name="305" href="#305">305</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> addCurrentStateChangeListener(<a href="../../../../../org/apache/helix/CurrentStateChangeListener.html">CurrentStateChangeListener</a> listener,
+<a class="jxr_linenumber" name="306" href="#306">306</a>       String instanceName, String sessionId) <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="307" href="#307">307</a>     addListener(listener, <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/PropertyKey.html">Builder</a>(_clusterName).currentStates(instanceName, sessionId),
+<a class="jxr_linenumber" name="308" href="#308">308</a>         ChangeType.CURRENT_STATE, <strong class="jxr_keyword">new</strong> EventType[] {
+<a class="jxr_linenumber" name="309" href="#309">309</a>             EventType.NodeChildrenChanged, EventType.NodeDeleted, EventType.NodeCreated
+<a class="jxr_linenumber" name="310" href="#310">310</a>         });
+<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>   @Override
+<a class="jxr_linenumber" name="314" href="#314">314</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> addHealthStateChangeListener(<a href="../../../../../org/apache/helix/HealthStateChangeListener.html">HealthStateChangeListener</a> listener, String instanceName)
+<a class="jxr_linenumber" name="315" href="#315">315</a>       <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="316" href="#316">316</a>     addListener(listener, <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/PropertyKey.html">Builder</a>(_clusterName).healthReports(instanceName), ChangeType.HEALTH,
+<a class="jxr_linenumber" name="317" href="#317">317</a>         <strong class="jxr_keyword">new</strong> EventType[] {
+<a class="jxr_linenumber" name="318" href="#318">318</a>             EventType.NodeChildrenChanged, EventType.NodeDeleted, EventType.NodeCreated
+<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> 
+<a class="jxr_linenumber" name="322" href="#322">322</a>   @Override
+<a class="jxr_linenumber" name="323" href="#323">323</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> addExternalViewChangeListener(<a href="../../../../../org/apache/helix/ExternalViewChangeListener.html">ExternalViewChangeListener</a> listener) <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="324" href="#324">324</a>     addListener(listener, <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/PropertyKey.html">Builder</a>(_clusterName).externalViews(), ChangeType.EXTERNAL_VIEW,
+<a class="jxr_linenumber" name="325" href="#325">325</a>         <strong class="jxr_keyword">new</strong> EventType[] {
+<a class="jxr_linenumber" name="326" href="#326">326</a>             EventType.NodeChildrenChanged, EventType.NodeDeleted, EventType.NodeCreated
+<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> 
+<a class="jxr_linenumber" name="330" href="#330">330</a>   @Override
+<a class="jxr_linenumber" name="331" href="#331">331</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> addControllerListener(<a href="../../../../../org/apache/helix/ControllerChangeListener.html">ControllerChangeListener</a> listener) {
+<a class="jxr_linenumber" name="332" href="#332">332</a>     addListener(listener, <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/PropertyKey.html">Builder</a>(_clusterName).controller(), ChangeType.CONTROLLER,
+<a class="jxr_linenumber" name="333" href="#333">333</a>         <strong class="jxr_keyword">new</strong> EventType[] {
+<a class="jxr_linenumber" name="334" href="#334">334</a>             EventType.NodeChildrenChanged, EventType.NodeDeleted, EventType.NodeCreated
+<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> 
+<a class="jxr_linenumber" name="338" href="#338">338</a>   <strong class="jxr_keyword">void</strong> addControllerMessageListener(<a href="../../../../../org/apache/helix/MessageListener.html">MessageListener</a> listener) {
+<a class="jxr_linenumber" name="339" href="#339">339</a>     addListener(listener, <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/PropertyKey.html">Builder</a>(_clusterName).controllerMessages(),
+<a class="jxr_linenumber" name="340" href="#340">340</a>         ChangeType.MESSAGES_CONTROLLER, <strong class="jxr_keyword">new</strong> EventType[] {
+<a class="jxr_linenumber" name="341" href="#341">341</a>             EventType.NodeChildrenChanged, EventType.NodeDeleted, EventType.NodeCreated
+<a class="jxr_linenumber" name="342" href="#342">342</a>         });
+<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>   @Override
+<a class="jxr_linenumber" name="346" href="#346">346</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> removeListener(<a href="../../../../../org/apache/helix/PropertyKey.html">PropertyKey</a> key, Object listener) {
+<a class="jxr_linenumber" name="347" href="#347">347</a>     LOG.info(<span class="jxr_string">"Removing listener: "</span> + listener + <span class="jxr_string">" on path: "</span> + key.getPath() + <span class="jxr_string">" from cluster: "</span>
+<a class="jxr_linenumber" name="348" href="#348">348</a>         + _clusterName + <span class="jxr_string">" by instance: "</span> + _instanceName);
+<a class="jxr_linenumber" name="349" href="#349">349</a> 
+<a class="jxr_linenumber" name="350" href="#350">350</a>     <strong class="jxr_keyword">synchronized</strong> (<strong class="jxr_keyword">this</strong>) {
+<a class="jxr_linenumber" name="351" href="#351">351</a>       List&lt;CallbackHandler&gt; toRemove = <strong class="jxr_keyword">new</strong> ArrayList&lt;CallbackHandler&gt;();
+<a class="jxr_linenumber" name="352" href="#352">352</a>       <strong class="jxr_keyword">for</strong> (CallbackHandler handler : _handlers) {
+<a class="jxr_linenumber" name="353" href="#353">353</a>         <em class="jxr_comment">// compare property-key path and listener reference</em>
+<a class="jxr_linenumber" name="354" href="#354">354</a>         <strong class="jxr_keyword">if</strong> (handler.getPath().equals(key.getPath()) &amp;&amp; handler.getListener().equals(listener)) {
+<a class="jxr_linenumber" name="355" href="#355">355</a>           toRemove.add(handler);
+<a class="jxr_linenumber" name="356" href="#356">356</a>         }
+<a class="jxr_linenumber" name="357" href="#357">357</a>       }
+<a class="jxr_linenumber" name="358" href="#358">358</a> 
+<a class="jxr_linenumber" name="359" href="#359">359</a>       _handlers.removeAll(toRemove);
+<a class="jxr_linenumber" name="360" href="#360">360</a> 
+<a class="jxr_linenumber" name="361" href="#361">361</a>       <em class="jxr_comment">// handler.reset() may modify the handlers list, so do it outside the iteration</em>
+<a class="jxr_linenumber" name="362" href="#362">362</a>       <strong class="jxr_keyword">for</strong> (CallbackHandler handler : toRemove) {
+<a class="jxr_linenumber" name="363" href="#363">363</a>         handler.reset();
+<a class="jxr_linenumber" name="364" href="#364">364</a>       }
+<a class="jxr_linenumber" name="365" href="#365">365</a>     }
+<a class="jxr_linenumber" name="366" href="#366">366</a> 
+<a class="jxr_linenumber" name="367" href="#367">367</a>     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
+<a class="jxr_linenumber" name="368" href="#368">368</a>   }
+<a class="jxr_linenumber" name="369" href="#369">369</a> 
+<a class="jxr_linenumber" name="370" href="#370">370</a>   @Override
+<a class="jxr_linenumber" name="371" href="#371">371</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/helix/HelixDataAccessor.html">HelixDataAccessor</a> getHelixDataAccessor() {
+<a class="jxr_linenumber" name="372" href="#372">372</a>     checkConnected();
+<a class="jxr_linenumber" name="373" href="#373">373</a>     <strong class="jxr_keyword">return</strong> _dataAccessor;
+<a class="jxr_linenumber" name="374" href="#374">374</a>   }
+<a class="jxr_linenumber" name="375" href="#375">375</a> 
+<a class="jxr_linenumber" name="376" href="#376">376</a>   @Override
+<a class="jxr_linenumber" name="377" href="#377">377</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/helix/ConfigAccessor.html">ConfigAccessor</a> getConfigAccessor() {
+<a class="jxr_linenumber" name="378" href="#378">378</a>     checkConnected();
+<a class="jxr_linenumber" name="379" href="#379">379</a>     <strong class="jxr_keyword">return</strong> _configAccessor;
+<a class="jxr_linenumber" name="380" href="#380">380</a>   }
+<a class="jxr_linenumber" name="381" href="#381">381</a> 
+<a class="jxr_linenumber" name="382" href="#382">382</a>   @Override
+<a class="jxr_linenumber" name="383" href="#383">383</a>   <strong class="jxr_keyword">public</strong> String getClusterName() {
+<a class="jxr_linenumber" name="384" href="#384">384</a>     <strong class="jxr_keyword">return</strong> _clusterName;
+<a class="jxr_linenumber" name="385" href="#385">385</a>   }
+<a class="jxr_linenumber" name="386" href="#386">386</a> 
+<a class="jxr_linenumber" name="387" href="#387">387</a>   @Override
+<a class="jxr_linenumber" name="388" href="#388">388</a>   <strong class="jxr_keyword">public</strong> String getInstanceName() {
+<a class="jxr_linenumber" name="389" href="#389">389</a>     <strong class="jxr_keyword">return</strong> _instanceName;
+<a class="jxr_linenumber" name="390" href="#390">390</a>   }
+<a class="jxr_linenumber" name="391" href="#391">391</a> 
+<a class="jxr_linenumber" name="392" href="#392">392</a>   @Override
+<a class="jxr_linenumber" name="393" href="#393">393</a>   <strong class="jxr_keyword">public</strong> String getSessionId() {
+<a class="jxr_linenumber" name="394" href="#394">394</a>     checkConnected();
+<a class="jxr_linenumber" name="395" href="#395">395</a>     <strong class="jxr_keyword">return</strong> _sessionId;
+<a class="jxr_linenumber" name="396" href="#396">396</a>   }
+<a class="jxr_linenumber" name="397" href="#397">397</a> 
+<a class="jxr_linenumber" name="398" href="#398">398</a>   @Override
+<a class="jxr_linenumber" name="399" href="#399">399</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">long</strong> getLastNotificationTime() {
+<a class="jxr_linenumber" name="400" href="#400">400</a>     <em class="jxr_comment">// TODO Auto-generated method stub</em>
+<a class="jxr_linenumber" name="401" href="#401">401</a>     <strong class="jxr_keyword">return</strong> 0;
+<a class="jxr_linenumber" name="402" href="#402">402</a>   }
+<a class="jxr_linenumber" name="403" href="#403">403</a> 
+<a class="jxr_linenumber" name="404" href="#404">404</a>   @Override
+<a class="jxr_linenumber" name="405" href="#405">405</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/helix/HelixAdmin.html">HelixAdmin</a> getClusterManagmentTool() {
+<a class="jxr_linenumber" name="406" href="#406">406</a>     checkConnected();
+<a class="jxr_linenumber" name="407" href="#407">407</a>     <strong class="jxr_keyword">if</strong> (_zkclient != <strong class="jxr_keyword">null</strong>) {
+<a class="jxr_linenumber" name="408" href="#408">408</a>       <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/manager/zk/ZKHelixAdmin.html">ZKHelixAdmin</a>(_zkclient);
+<a class="jxr_linenumber" name="409" href="#409">409</a>     }
+<a class="jxr_linenumber" name="410" href="#410">410</a> 
+<a class="jxr_linenumber" name="411" href="#411">411</a>     LOG.error(<span class="jxr_string">"Couldn't get ZKClusterManagementTool because zkclient is null"</span>);
+<a class="jxr_linenumber" name="412" href="#412">412</a>     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="413" href="#413">413</a>   }
+<a class="jxr_linenumber" name="414" href="#414">414</a> 
+<a class="jxr_linenumber" name="415" href="#415">415</a>   @Override
+<a class="jxr_linenumber" name="416" href="#416">416</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">synchronized</strong> ZkHelixPropertyStore&lt;ZNRecord&gt; getHelixPropertyStore() {
+<a class="jxr_linenumber" name="417" href="#417">417</a>     checkConnected();
+<a class="jxr_linenumber" name="418" href="#418">418</a> 
+<a class="jxr_linenumber" name="419" href="#419">419</a>     <strong class="jxr_keyword">if</strong> (_helixPropertyStore == <strong class="jxr_keyword">null</strong>) {
+<a class="jxr_linenumber" name="420" href="#420">420</a>       String path = PropertyPathConfig.getPath(PropertyType.PROPERTYSTORE, _clusterName);
+<a class="jxr_linenumber" name="421" href="#421">421</a> 
+<a class="jxr_linenumber" name="422" href="#422">422</a>       _helixPropertyStore =
+<a class="jxr_linenumber" name="423" href="#423">423</a>           <strong class="jxr_keyword">new</strong> ZkHelixPropertyStore&lt;ZNRecord&gt;(<strong class="jxr_keyword">new</strong> ZkBaseDataAccessor&lt;ZNRecord&gt;(_zkclient), path,
+<a class="jxr_linenumber" name="424" href="#424">424</a>               <strong class="jxr_keyword">null</strong>);
+<a class="jxr_linenumber" name="425" href="#425">425</a>     }
+<a class="jxr_linenumber" name="426" href="#426">426</a> 
+<a class="jxr_linenumber" name="427" href="#427">427</a>     <strong class="jxr_keyword">return</strong> _helixPropertyStore;
+<a class="jxr_linenumber" name="428" href="#428">428</a>   }
+<a class="jxr_linenumber" name="429" href="#429">429</a> 
+<a class="jxr_linenumber" name="430" href="#430">430</a>   @Override
+<a class="jxr_linenumber" name="431" href="#431">431</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/helix/ClusterMessagingService.html">ClusterMessagingService</a> getMessagingService() {
+<a class="jxr_linenumber" name="432" href="#432">432</a>     <em class="jxr_comment">// The caller can register message handler factories on messaging service before the</em>
+<a class="jxr_linenumber" name="433" href="#433">433</a>     <em class="jxr_comment">// helix manager is connected. Thus we do not check connected here</em>
+<a class="jxr_linenumber" name="434" href="#434">434</a>     <strong class="jxr_keyword">return</strong> _messagingService;
+<a class="jxr_linenumber" name="435" href="#435">435</a>   }
+<a class="jxr_linenumber" name="436" href="#436">436</a> 
+<a class="jxr_linenumber" name="437" href="#437">437</a>   @Override
+<a class="jxr_linenumber" name="438" href="#438">438</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/helix/healthcheck/ParticipantHealthReportCollector.html">ParticipantHealthReportCollector</a> getHealthReportCollector() {
+<a class="jxr_linenumber" name="439" href="#439">439</a>     <em class="jxr_comment">// helix-participant will override this</em>
+<a class="jxr_linenumber" name="440" href="#440">440</a>     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="441" href="#441">441</a>   }
+<a class="jxr_linenumber" name="442" href="#442">442</a> 
+<a class="jxr_linenumber" name="443" href="#443">443</a>   @Override
+<a class="jxr_linenumber" name="444" href="#444">444</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/helix/InstanceType.html">InstanceType</a> getInstanceType() {
+<a class="jxr_linenumber" name="445" href="#445">445</a>     <strong class="jxr_keyword">return</strong> _instanceType;
+<a class="jxr_linenumber" name="446" href="#446">446</a>   }
+<a class="jxr_linenumber" name="447" href="#447">447</a> 
+<a class="jxr_linenumber" name="448" href="#448">448</a>   @Override
+<a class="jxr_linenumber" name="449" href="#449">449</a>   <strong class="jxr_keyword">public</strong> String getVersion() {
+<a class="jxr_linenumber" name="450" href="#450">450</a>     <strong class="jxr_keyword">return</strong> _version;
+<a class="jxr_linenumber" name="451" href="#451">451</a>   }
+<a class="jxr_linenumber" name="452" href="#452">452</a> 
+<a class="jxr_linenumber" name="453" href="#453">453</a>   @Override
+<a class="jxr_linenumber" name="454" href="#454">454</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/helix/HelixManagerProperties.html">HelixManagerProperties</a> getProperties() {
+<a class="jxr_linenumber" name="455" href="#455">455</a>     <strong class="jxr_keyword">return</strong> _properties;
+<a class="jxr_linenumber" name="456" href="#456">456</a>   }
+<a class="jxr_linenumber" name="457" href="#457">457</a> 
+<a class="jxr_linenumber" name="458" href="#458">458</a>   @Override
+<a class="jxr_linenumber" name="459" href="#459">459</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/helix/participant/StateMachineEngine.html">StateMachineEngine</a> getStateMachineEngine() {
+<a class="jxr_linenumber" name="460" href="#460">460</a>     <em class="jxr_comment">// helix-participant will override this</em>
+<a class="jxr_linenumber" name="461" href="#461">461</a>     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="462" href="#462">462</a>   }
+<a class="jxr_linenumber" name="463" href="#463">463</a> 
+<a class="jxr_linenumber" name="464" href="#464">464</a>   @Override
+<a class="jxr_linenumber" name="465" href="#465">465</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">boolean</strong> isLeader();
+<a class="jxr_linenumber" name="466" href="#466">466</a> 
+<a class="jxr_linenumber" name="467" href="#467">467</a>   @Override
+<a class="jxr_linenumber" name="468" href="#468">468</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> startTimerTasks() {
+<a class="jxr_linenumber" name="469" href="#469">469</a>     <strong class="jxr_keyword">for</strong> (HelixTimerTask task : _timerTasks) {
+<a class="jxr_linenumber" name="470" href="#470">470</a>       task.start();
+<a class="jxr_linenumber" name="471" href="#471">471</a>     }
+<a class="jxr_linenumber" name="472" href="#472">472</a> 
+<a class="jxr_linenumber" name="473" href="#473">473</a>   }
+<a class="jxr_linenumber" name="474" href="#474">474</a> 
+<a class="jxr_linenumber" name="475" href="#475">475</a>   @Override
+<a class="jxr_linenumber" name="476" href="#476">476</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> stopTimerTasks() {
+<a class="jxr_linenumber" name="477" href="#477">477</a>     <strong class="jxr_keyword">for</strong> (HelixTimerTask task : _timerTasks) {
+<a class="jxr_linenumber" name="478" href="#478">478</a>       task.stop();
+<a class="jxr_linenumber" name="479" href="#479">479</a>     }
+<a class="jxr_linenumber" name="480" href="#480">480</a> 
+<a class="jxr_linenumber" name="481" href="#481">481</a>   }
+<a class="jxr_linenumber" name="482" href="#482">482</a> 
+<a class="jxr_linenumber" name="483" href="#483">483</a>   @Override
+<a class="jxr_linenumber" name="484" href="#484">484</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> addPreConnectCallback(<a href="../../../../../org/apache/helix/PreConnectCallback.html">PreConnectCallback</a> callback) {
+<a class="jxr_linenumber" name="485" href="#485">485</a>     LOG.info(<span class="jxr_string">"Adding preconnect callback: "</span> + callback);
+<a class="jxr_linenumber" name="486" href="#486">486</a>     _preConnectCallbacks.add(callback);
+<a class="jxr_linenumber" name="487" href="#487">487</a>   }
+<a class="jxr_linenumber" name="488" href="#488">488</a> 
+<a class="jxr_linenumber" name="489" href="#489">489</a>   @Override
+<a class="jxr_linenumber" name="490" href="#490">490</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> setLiveInstanceInfoProvider(<a href="../../../../../org/apache/helix/LiveInstanceInfoProvider.html">LiveInstanceInfoProvider</a> liveInstanceInfoProvider) {
+<a class="jxr_linenumber" name="491" href="#491">491</a>     _liveInstanceInfoProvider = liveInstanceInfoProvider;
+<a class="jxr_linenumber" name="492" href="#492">492</a>   }
+<a class="jxr_linenumber" name="493" href="#493">493</a> 
+<a class="jxr_linenumber" name="494" href="#494">494</a>   <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="495" href="#495">495</a> <em class="jxr_javadoccomment">   * wait until we get a non-zero session-id. note that we might lose zkconnection</em>
+<a class="jxr_linenumber" name="496" href="#496">496</a> <em class="jxr_javadoccomment">   * right after we read session-id. but it's ok to get stale session-id and we will have</em>
+<a class="jxr_linenumber" name="497" href="#497">497</a> <em class="jxr_javadoccomment">   * another handle-new-session callback to correct this.</em>
+<a class="jxr_linenumber" name="498" href="#498">498</a> <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="499" href="#499">499</a>   <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> waitUntilConnected() {
+<a class="jxr_linenumber" name="500" href="#500">500</a>     <strong class="jxr_keyword">boolean</strong> isConnected;
+<a class="jxr_linenumber" name="501" href="#501">501</a>     <strong class="jxr_keyword">do</strong> {
+<a class="jxr_linenumber" name="502" href="#502">502</a>       isConnected =
+<a class="jxr_linenumber" name="503" href="#503">503</a>           _zkclient.waitUntilConnected(ZkClient.DEFAULT_CONNECTION_TIMEOUT, TimeUnit.MILLISECONDS);
+<a class="jxr_linenumber" name="504" href="#504">504</a>       <strong class="jxr_keyword">if</strong> (!isConnected) {
+<a class="jxr_linenumber" name="505" href="#505">505</a>         LOG.error(<span class="jxr_string">"fail to connect zkserver: "</span> + _zkAddress + <span class="jxr_string">" in "</span>
+<a class="jxr_linenumber" name="506" href="#506">506</a>             + ZkClient.DEFAULT_CONNECTION_TIMEOUT + <span class="jxr_string">"ms. expiredSessionId: "</span> + _sessionId
+<a class="jxr_linenumber" name="507" href="#507">507</a>             + <span class="jxr_string">", clusterName: "</span> + _clusterName);
+<a class="jxr_linenumber" name="508" href="#508">508</a>         <strong class="jxr_keyword">continue</strong>;
+<a class="jxr_linenumber" name="509" href="#509">509</a>       }
+<a class="jxr_linenumber" name="510" href="#510">510</a> 
+<a class="jxr_linenumber" name="511" href="#511">511</a>       ZkConnection zkConnection = ((ZkConnection) _zkclient.getConnection());
+<a class="jxr_linenumber" name="512" href="#512">512</a>       _sessionId = Long.toHexString(zkConnection.getZookeeper().getSessionId());
+<a class="jxr_linenumber" name="513" href="#513">513</a> 
+<a class="jxr_linenumber" name="514" href="#514">514</a>       <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="515" href="#515">515</a> <em class="jxr_javadoccomment">       * at the time we read session-id, zkconnection might be lost again</em>
+<a class="jxr_linenumber" name="516" href="#516">516</a> <em class="jxr_javadoccomment">       * wait until we get a non-zero session-id</em>
+<a class="jxr_linenumber" name="517" href="#517">517</a> <em class="jxr_javadoccomment">       */</em>
+<a class="jxr_linenumber" name="518" href="#518">518</a>     } <strong class="jxr_keyword">while</strong> (<span class="jxr_string">"0"</span>.equals(_sessionId));
+<a class="jxr_linenumber" name="519" href="#519">519</a> 
+<a class="jxr_linenumber" name="520" href="#520">520</a>     LOG.info(<span class="jxr_string">"Handling new session, session id: "</span> + _sessionId + <span class="jxr_string">", instance: "</span> + _instanceName
+<a class="jxr_linenumber" name="521" href="#521">521</a>         + <span class="jxr_string">", instanceTye: "</span> + _instanceType + <span class="jxr_string">", cluster: "</span> + _clusterName + <span class="jxr_string">", zkconnection: "</span>
+<a class="jxr_linenumber" name="522" href="#522">522</a>         + ((ZkConnection) _zkclient.getConnection()).getZookeeper());
+<a class="jxr_linenumber" name="523" href="#523">523</a>   }
+<a class="jxr_linenumber" name="524" href="#524">524</a> 
+<a class="jxr_linenumber" name="525" href="#525">525</a>   <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> checkConnected() {
+<a class="jxr_linenumber" name="526" href="#526">526</a>     <strong class="jxr_keyword">if</strong> (!isConnected()) {
+<a class="jxr_linenumber" name="527" href="#527">527</a>       <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/HelixException.html">HelixException</a>(<span class="jxr_string">"ClusterManager not connected. Call clusterManager.connect()"</span>);
+<a class="jxr_linenumber" name="528" href="#528">528</a>     }
+<a class="jxr_linenumber" name="529" href="#529">529</a>   }
+<a class="jxr_linenumber" name="530" href="#530">530</a> 
+<a class="jxr_linenumber" name="531" href="#531">531</a>   <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> addListener(Object listener, <a href="../../../../../org/apache/helix/PropertyKey.html">PropertyKey</a> propertyKey, <a href="../../../../../org/apache/helix/HelixConstants.html">ChangeType</a> changeType,
+<a class="jxr_linenumber" name="532" href="#532">532</a>       EventType[] eventType) {
+<a class="jxr_linenumber" name="533" href="#533">533</a>     checkConnected();
+<a class="jxr_linenumber" name="534" href="#534">534</a> 
+<a class="jxr_linenumber" name="535" href="#535">535</a>     <a href="../../../../../org/apache/helix/PropertyType.html">PropertyType</a> type = propertyKey.getType();
+<a class="jxr_linenumber" name="536" href="#536">536</a> 
+<a class="jxr_linenumber" name="537" href="#537">537</a>     <strong class="jxr_keyword">synchronized</strong> (<strong class="jxr_keyword">this</strong>) {
+<a class="jxr_linenumber" name="538" href="#538">538</a>       <strong class="jxr_keyword">for</strong> (CallbackHandler handler : _handlers) {
+<a class="jxr_linenumber" name="539" href="#539">539</a>         <em class="jxr_comment">// compare property-key path and listener reference</em>
+<a class="jxr_linenumber" name="540" href="#540">540</a>         <strong class="jxr_keyword">if</strong> (handler.getPath().equals(propertyKey.getPath())
+<a class="jxr_linenumber" name="541" href="#541">541</a>             &amp;&amp; handler.getListener().equals(listener)) {
+<a class="jxr_linenumber" name="542" href="#542">542</a>           LOG.info(<span class="jxr_string">"Listener: "</span> + listener + <span class="jxr_string">" on path: "</span> + propertyKey.getPath()
+<a class="jxr_linenumber" name="543" href="#543">543</a>               + <span class="jxr_string">" already exists. skip add"</span>);
+<a class="jxr_linenumber" name="544" href="#544">544</a> 
+<a class="jxr_linenumber" name="545" href="#545">545</a>           <strong class="jxr_keyword">return</strong>;
+<a class="jxr_linenumber" name="546" href="#546">546</a>         }
+<a class="jxr_linenumber" name="547" href="#547">547</a>       }
+<a class="jxr_linenumber" name="548" href="#548">548</a> 
+<a class="jxr_linenumber" name="549" href="#549">549</a>       <a href="../../../../../org/apache/helix/manager/zk/CallbackHandler.html">CallbackHandler</a> newHandler =
+<a class="jxr_linenumber" name="550" href="#550">550</a>           <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/manager/zk/CallbackHandler.html">CallbackHandler</a>(<strong class="jxr_keyword">this</strong>, _zkclient, propertyKey, listener, eventType, changeType);
+<a class="jxr_linenumber" name="551" href="#551">551</a> 
+<a class="jxr_linenumber" name="552" href="#552">552</a>       _handlers.add(newHandler);
+<a class="jxr_linenumber" name="553" href="#553">553</a>       LOG.info(<span class="jxr_string">"Added listener: "</span> + listener + <span class="jxr_string">" for type: "</span> + type + <span class="jxr_string">" to path: "</span>
+<a class="jxr_linenumber" name="554" href="#554">554</a>           + newHandler.getPath());
+<a class="jxr_linenumber" name="555" href="#555">555</a>     }
+<a class="jxr_linenumber" name="556" href="#556">556</a>   }
+<a class="jxr_linenumber" name="557" href="#557">557</a> 
+<a class="jxr_linenumber" name="558" href="#558">558</a>   <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> initHandlers(List&lt;CallbackHandler&gt; handlers) {
+<a class="jxr_linenumber" name="559" href="#559">559</a>     <strong class="jxr_keyword">synchronized</strong> (<strong class="jxr_keyword">this</strong>) {
+<a class="jxr_linenumber" name="560" href="#560">560</a>       <strong class="jxr_keyword">if</strong> (handlers != <strong class="jxr_keyword">null</strong>) {
+<a class="jxr_linenumber" name="561" href="#561">561</a>         <strong class="jxr_keyword">for</strong> (CallbackHandler handler : handlers) {
+<a class="jxr_linenumber" name="562" href="#562">562</a>           handler.init();
+<a class="jxr_linenumber" name="563" href="#563">563</a>           LOG.info(<span class="jxr_string">"init handler: "</span> + handler.getPath() + <span class="jxr_string">", "</span> + handler.getListener());
+<a class="jxr_linenumber" name="564" href="#564">564</a>         }
+<a class="jxr_linenumber" name="565" href="#565">565</a>       }
+<a class="jxr_linenumber" name="566" href="#566">566</a>     }
+<a class="jxr_linenumber" name="567" href="#567">567</a>   }
+<a class="jxr_linenumber" name="568" href="#568">568</a> 
+<a class="jxr_linenumber" name="569" href="#569">569</a>   <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> resetHandlers() {
+<a class="jxr_linenumber" name="570" href="#570">570</a>     <strong class="jxr_keyword">synchronized</strong> (<strong class="jxr_keyword">this</strong>) {
+<a class="jxr_linenumber" name="571" href="#571">571</a>       <strong class="jxr_keyword">if</strong> (_handlers != <strong class="jxr_keyword">null</strong>) {
+<a class="jxr_linenumber" name="572" href="#572">572</a>         <em class="jxr_comment">// get a copy of the list and iterate over the copy list</em>
+<a class="jxr_linenumber" name="573" href="#573">573</a>         <em class="jxr_comment">// in case handler.reset() modify the original handler list</em>
+<a class="jxr_linenumber" name="574" href="#574">574</a>         List&lt;CallbackHandler&gt; tmpHandlers = <strong class="jxr_keyword">new</strong> ArrayList&lt;CallbackHandler&gt;();
+<a class="jxr_linenumber" name="575" href="#575">575</a>         tmpHandlers.addAll(_handlers);
+<a class="jxr_linenumber" name="576" href="#576">576</a> 
+<a class="jxr_linenumber" name="577" href="#577">577</a>         <strong class="jxr_keyword">for</strong> (CallbackHandler handler : tmpHandlers) {
+<a class="jxr_linenumber" name="578" href="#578">578</a>           handler.reset();
+<a class="jxr_linenumber" name="579" href="#579">579</a>           LOG.info(<span class="jxr_string">"reset handler: "</span> + handler.getPath() + <span class="jxr_string">", "</span> + handler.getListener());
+<a class="jxr_linenumber" name="580" href="#580">580</a>         }
+<a class="jxr_linenumber" name="581" href="#581">581</a>       }
+<a class="jxr_linenumber" name="582" href="#582">582</a>     }
+<a class="jxr_linenumber" name="583" href="#583">583</a>   }
+<a class="jxr_linenumber" name="584" href="#584">584</a> 
+<a class="jxr_linenumber" name="585" href="#585">585</a>   <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="586" href="#586">586</a> <em class="jxr_javadoccomment">   * different helix-manager may override this to have a cache-enabled based-data-accessor</em>
+<a class="jxr_linenumber" name="587" href="#587">587</a> <em class="jxr_javadoccomment">   * @param baseDataAccessor</em>
+<a class="jxr_linenumber" name="588" href="#588">588</a> <em class="jxr_javadoccomment">   * @return</em>
+<a class="jxr_linenumber" name="589" href="#589">589</a> <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="590" href="#590">590</a>   BaseDataAccessor&lt;ZNRecord&gt; createBaseDataAccessor(ZkBaseDataAccessor&lt;ZNRecord&gt; baseDataAccessor) {
+<a class="jxr_linenumber" name="591" href="#591">591</a>     <strong class="jxr_keyword">return</strong> baseDataAccessor;
+<a class="jxr_linenumber" name="592" href="#592">592</a>   }
+<a class="jxr_linenumber" name="593" href="#593">593</a> 
+<a class="jxr_linenumber" name="594" href="#594">594</a>   <strong class="jxr_keyword">void</strong> createClient() <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="595" href="#595">595</a>     <a href="../../../../../org/apache/helix/manager/zk/PathBasedZkSerializer.html">PathBasedZkSerializer</a> zkSerializer =
+<a class="jxr_linenumber" name="596" href="#596">596</a>         ChainedPathZkSerializer.builder(<strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/manager/zk/ZNRecordStreamingSerializer.html">ZNRecordStreamingSerializer</a>()).build();
+<a class="jxr_linenumber" name="597" href="#597">597</a> 
+<a class="jxr_linenumber" name="598" href="#598">598</a>     _zkclient =
+<a class="jxr_linenumber" name="599" href="#599">599</a>         <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/manager/zk/ZkClient.html">ZkClient</a>(_zkAddress, _sessionTimeout, ZkClient.DEFAULT_CONNECTION_TIMEOUT, zkSerializer);
+<a class="jxr_linenumber" name="600" href="#600">600</a> 
+<a class="jxr_linenumber" name="601" href="#601">601</a>     ZkBaseDataAccessor&lt;ZNRecord&gt; baseDataAccessor = <strong class="jxr_keyword">new</strong> ZkBaseDataAccessor&lt;ZNRecord&gt;(_zkclient);
+<a class="jxr_linenumber" name="602" href="#602">602</a> 
+<a class="jxr_linenumber" name="603" href="#603">603</a>     _baseDataAccessor = createBaseDataAccessor(baseDataAccessor);
+<a class="jxr_linenumber" name="604" href="#604">604</a> 
+<a class="jxr_linenumber" name="605" href="#605">605</a>     _dataAccessor = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/manager/zk/ZKHelixDataAccessor.html">ZKHelixDataAccessor</a>(_clusterName, _instanceType, _baseDataAccessor);
+<a class="jxr_linenumber" name="606" href="#606">606</a>     _configAccessor = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/ConfigAccessor.html">ConfigAccessor</a>(_zkclient);
+<a class="jxr_linenumber" name="607" href="#607">607</a> 
+<a class="jxr_linenumber" name="608" href="#608">608</a>     <strong class="jxr_keyword">int</strong> retryCount = 0;
+<a class="jxr_linenumber" name="609" href="#609">609</a> 
+<a class="jxr_linenumber" name="610" href="#610">610</a>     _zkclient.subscribeStateChanges(<strong class="jxr_keyword">this</strong>);
+<a class="jxr_linenumber" name="611" href="#611">611</a>     <strong class="jxr_keyword">while</strong> (retryCount &lt; 3) {
+<a class="jxr_linenumber" name="612" href="#612">612</a>       <strong class="jxr_keyword">try</strong> {
+<a class="jxr_linenumber" name="613" href="#613">613</a>         _zkclient.waitUntilConnected(_sessionTimeout, TimeUnit.MILLISECONDS);
+<a class="jxr_linenumber" name="614" href="#614">614</a>         handleStateChanged(KeeperState.SyncConnected);
+<a class="jxr_linenumber" name="615" href="#615">615</a>         handleNewSession();
+<a class="jxr_linenumber" name="616" href="#616">616</a>         <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="617" href="#617">617</a>       } <strong class="jxr_keyword">catch</strong> (HelixException e) {
+<a class="jxr_linenumber" name="618" href="#618">618</a>         LOG.error(<span class="jxr_string">"fail to createClient."</span>, e);
+<a class="jxr_linenumber" name="619" href="#619">619</a>         <strong class="jxr_keyword">throw</strong> e;
+<a class="jxr_linenumber" name="620" href="#620">620</a>       } <strong class="jxr_keyword">catch</strong> (Exception e) {
+<a class="jxr_linenumber" name="621" href="#621">621</a>         retryCount++;
+<a class="jxr_linenumber" name="622" href="#622">622</a> 
+<a class="jxr_linenumber" name="623" href="#623">623</a>         LOG.error(<span class="jxr_string">"fail to createClient. retry "</span> + retryCount, e);
+<a class="jxr_linenumber" name="624" href="#624">624</a>         <strong class="jxr_keyword">if</strong> (retryCount == 3) {
+<a class="jxr_linenumber" name="625" href="#625">625</a>           <strong class="jxr_keyword">throw</strong> e;
+<a class="jxr_linenumber" name="626" href="#626">626</a>         }
+<a class="jxr_linenumber" name="627" href="#627">627</a>       }
+<a class="jxr_linenumber" name="628" href="#628">628</a>     }
+<a class="jxr_linenumber" name="629" href="#629">629</a>   }
+<a class="jxr_linenumber" name="630" href="#630">630</a> 
+<a class="jxr_linenumber" name="631" href="#631">631</a>   <em class="jxr_comment">// TODO separate out flapping detection code</em>
+<a class="jxr_linenumber" name="632" href="#632">632</a>   @Override
+<a class="jxr_linenumber" name="633" href="#633">633</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> handleStateChanged(KeeperState state) <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="634" href="#634">634</a>     <strong class="jxr_keyword">switch</strong> (state) {
+<a class="jxr_linenumber" name="635" href="#635">635</a>     <strong class="jxr_keyword">case</strong> SyncConnected:
+<a class="jxr_linenumber" name="636" href="#636">636</a>       ZkConnection zkConnection = (ZkConnection) _zkclient.getConnection();
+<a class="jxr_linenumber" name="637" href="#637">637</a>       LOG.info(<span class="jxr_string">"KeeperState: "</span> + state + <span class="jxr_string">", zookeeper:"</span> + zkConnection.getZookeeper());
+<a class="jxr_linenumber" name="638" href="#638">638</a>       <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="639" href="#639">639</a>     <strong class="jxr_keyword">case</strong> Disconnected:
+<a class="jxr_linenumber" name="640" href="#640">640</a>       LOG.info(<span class="jxr_string">"KeeperState:"</span> + state + <span class="jxr_string">", disconnectedSessionId: "</span> + _sessionId + <span class="jxr_string">", instance: "</span>
+<a class="jxr_linenumber" name="641" href="#641">641</a>           + _instanceName + <span class="jxr_string">", type: "</span> + _instanceType);
+<a class="jxr_linenumber" name="642" href="#642">642</a> 
+<a class="jxr_linenumber" name="643" href="#643">643</a>       <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="644" href="#644">644</a> <em class="jxr_javadoccomment">       * Track the time stamp that the disconnected happens, then check history and see if</em>
+<a class="jxr_linenumber" name="645" href="#645">645</a> <em class="jxr_javadoccomment">       * we should disconnect the helix-manager</em>
+<a class="jxr_linenumber" name="646" href="#646">646</a> <em class="jxr_javadoccomment">       */</em>
+<a class="jxr_linenumber" name="647" href="#647">647</a>       _disconnectTimeHistory.add(System.currentTimeMillis());
+<a class="jxr_linenumber" name="648" href="#648">648</a>       <strong class="jxr_keyword">if</strong> (isFlapping()) {
+<a class="jxr_linenumber" name="649" href="#649">649</a>         LOG.error(<span class="jxr_string">"instanceName: "</span> + _instanceName + <span class="jxr_string">" is flapping. diconnect it. "</span>
+<a class="jxr_linenumber" name="650" href="#650">650</a>             + <span class="jxr_string">" maxDisconnectThreshold: "</span> + _maxDisconnectThreshold + <span class="jxr_string">" disconnects in "</span>
+<a class="jxr_linenumber" name="651" href="#651">651</a>             + _flappingTimeWindowMs + <span class="jxr_string">"ms."</span>);
+<a class="jxr_linenumber" name="652" href="#652">652</a>         disconnect();
+<a class="jxr_linenumber" name="653" href="#653">653</a>       }
+<a class="jxr_linenumber" name="654" href="#654">654</a>       <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="655" href="#655">655</a>     <strong class="jxr_keyword">case</strong> Expired:
+<a class="jxr_linenumber" name="656" href="#656">656</a>       LOG.info(<span class="jxr_string">"KeeperState:"</span> + state + <span class="jxr_string">", expiredSessionId: "</span> + _sessionId + <span class="jxr_string">", instance: "</span>
+<a class="jxr_linenumber" name="657" href="#657">657</a>           + _instanceName + <span class="jxr_string">", type: "</span> + _instanceType);
+<a class="jxr_linenumber" name="658" href="#658">658</a>       <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="659" href="#659">659</a>     <strong class="jxr_keyword">default</strong>:
+<a class="jxr_linenumber" name="660" href="#660">660</a>       <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="661" href="#661">661</a>     }
+<a class="jxr_linenumber" name="662" href="#662">662</a>   }
+<a class="jxr_linenumber" name="663" href="#663">663</a> 
+<a class="jxr_linenumber" name="664" href="#664">664</a>   <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="665" href="#665">665</a> <em class="jxr_javadoccomment">   * If zk state has changed into Disconnected for _maxDisconnectThreshold times during previous</em>
+<a class="jxr_linenumber" name="666" href="#666">666</a> <em class="jxr_javadoccomment">   * _timeWindowLengthMs Ms</em>
+<a class="jxr_linenumber" name="667" href="#667">667</a> <em class="jxr_javadoccomment">   * time window, we think that there are something wrong going on and disconnect the zkHelixManager</em>
+<a class="jxr_linenumber" name="668" href="#668">668</a> <em class="jxr_javadoccomment">   * from zk.</em>
+<a class="jxr_linenumber" name="669" href="#669">669</a> <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="670" href="#670">670</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> isFlapping() {
+<a class="jxr_linenumber" name="671" href="#671">671</a>     <strong class="jxr_keyword">if</strong> (_disconnectTimeHistory.size() == 0) {
+<a class="jxr_linenumber" name="672" href="#672">672</a>       <strong class="jxr_keyword">return</strong> false;
+<a class="jxr_linenumber" name="673" href="#673">673</a>     }
+<a class="jxr_linenumber" name="674" href="#674">674</a>     <strong class="jxr_keyword">long</strong> mostRecentTimestamp = _disconnectTimeHistory.get(_disconnectTimeHistory.size() - 1);
+<a class="jxr_linenumber" name="675" href="#675">675</a> 
+<a class="jxr_linenumber" name="676" href="#676">676</a>     <em class="jxr_comment">// Remove disconnect history timestamp that are older than _flappingTimeWindowMs ago</em>
+<a class="jxr_linenumber" name="677" href="#677">677</a>     <strong class="jxr_keyword">while</strong> ((_disconnectTimeHistory.get(0) + _flappingTimeWindowMs) &lt; mostRecentTimestamp) {
+<a class="jxr_linenumber" name="678" href="#678">678</a>       _disconnectTimeHistory.remove(0);
+<a class="jxr_linenumber" name="679" href="#679">679</a>     }
+<a class="jxr_linenumber" name="680" href="#680">680</a>     <strong class="jxr_keyword">return</strong> _disconnectTimeHistory.size() &gt; _maxDisconnectThreshold;
+<a class="jxr_linenumber" name="681" href="#681">681</a>   }
+<a class="jxr_linenumber" name="682" href="#682">682</a> 
+<a class="jxr_linenumber" name="683" href="#683">683</a>   <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="684" href="#684">684</a> <em class="jxr_javadoccomment">   * controller should override it to return a list of timers that need to start/stop when</em>
+<a class="jxr_linenumber" name="685" href="#685">685</a> <em class="jxr_javadoccomment">   * leadership changes</em>
+<a class="jxr_linenumber" name="686" href="#686">686</a> <em class="jxr_javadoccomment">   * @return</em>
+<a class="jxr_linenumber" name="687" href="#687">687</a> <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="688" href="#688">688</a>   <strong class="jxr_keyword">protected</strong> List&lt;HelixTimerTask&gt; getControllerHelixTimerTasks() {
+<a class="jxr_linenumber" name="689" href="#689">689</a>     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="690" href="#690">690</a>   }
+<a class="jxr_linenumber" name="691" href="#691">691</a> }
+</pre>
+<hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body>
+</html>



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