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From ol...@apache.org
Subject svn commit: r1442295 [35/38] - in /incubator/helix/site-content: ./ apidocs/assets/ apidocs/reference/ apidocs/reference/org/apache/helix/ apidocs/reference/org/apache/helix/manager/zk/ helix-admin-webapp/ helix-core/ involved/ mockservice/ recipes/ re...
Date Mon, 04 Feb 2013 18:40:12 GMT
Modified: incubator/helix/site-content/xref/org/apache/helix/manager/zk/CallbackHandler.html
URL: http://svn.apache.org/viewvc/incubator/helix/site-content/xref/org/apache/helix/manager/zk/CallbackHandler.html?rev=1442295&r1=1442294&r2=1442295&view=diff
==============================================================================
--- incubator/helix/site-content/xref/org/apache/helix/manager/zk/CallbackHandler.html (original)
+++ incubator/helix/site-content/xref/org/apache/helix/manager/zk/CallbackHandler.html Mon Feb  4 18:40:07 2013
@@ -54,435 +54,452 @@
 <a class="jxr_linenumber" name="44" href="#44">44</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.HelixManager;
 <a class="jxr_linenumber" name="45" href="#45">45</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.HelixProperty;
 <a class="jxr_linenumber" name="46" href="#46">46</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.IdealStateChangeListener;
-<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.MessageListener;
-<a class="jxr_linenumber" name="49" href="#49">49</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.NotificationContext;
-<a class="jxr_linenumber" name="50" href="#50">50</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.PropertyKey.Builder;
-<a class="jxr_linenumber" name="51" href="#51">51</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.PropertyPathConfig;
-<a class="jxr_linenumber" name="52" href="#52">52</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.ZNRecord;
-<a class="jxr_linenumber" name="53" href="#53">53</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.CurrentState;
-<a class="jxr_linenumber" name="54" href="#54">54</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.ExternalView;
-<a class="jxr_linenumber" name="55" href="#55">55</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.HealthStat;
-<a class="jxr_linenumber" name="56" href="#56">56</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.IdealState;
-<a class="jxr_linenumber" name="57" href="#57">57</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.InstanceConfig;
-<a class="jxr_linenumber" name="58" href="#58">58</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.LiveInstance;
-<a class="jxr_linenumber" name="59" href="#59">59</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.Message;
-<a class="jxr_linenumber" name="60" href="#60">60</a>  <strong class="jxr_keyword">import</strong> org.apache.log4j.Logger;
-<a class="jxr_linenumber" name="61" href="#61">61</a>  <strong class="jxr_keyword">import</strong> org.apache.zookeeper.Watcher.Event.EventType;
-<a class="jxr_linenumber" name="62" href="#62">62</a>  
-<a class="jxr_linenumber" name="63" href="#63">63</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/apache/helix/manager/zk/CallbackHandler.html">CallbackHandler</a> <strong class="jxr_keyword">implements</strong> IZkChildListener, IZkDataListener
-<a class="jxr_linenumber" name="64" href="#64">64</a>  
-<a class="jxr_linenumber" name="65" href="#65">65</a>  {
-<a class="jxr_linenumber" name="66" href="#66">66</a>  
-<a class="jxr_linenumber" name="67" href="#67">67</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> Logger           logger = Logger.getLogger(CallbackHandler.<strong class="jxr_keyword">class</strong>);
-<a class="jxr_linenumber" name="68" href="#68">68</a>  
-<a class="jxr_linenumber" name="69" href="#69">69</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> String            _path;
-<a class="jxr_linenumber" name="70" href="#70">70</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Object            _listener;
-<a class="jxr_linenumber" name="71" href="#71">71</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> EventType[]       _eventTypes;
-<a class="jxr_linenumber" name="72" href="#72">72</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/helix/HelixDataAccessor.html">HelixDataAccessor</a> _accessor;
-<a class="jxr_linenumber" name="73" href="#73">73</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/helix/HelixConstants.html">ChangeType</a>        _changeType;
-<a class="jxr_linenumber" name="74" href="#74">74</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/helix/manager/zk/ZkClient.html">ZkClient</a>          _zkClient;
-<a class="jxr_linenumber" name="75" href="#75">75</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> AtomicLong        _lastNotificationTimeStamp;
-<a class="jxr_linenumber" name="76" href="#76">76</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/helix/HelixManager.html">HelixManager</a>      _manager;
-<a class="jxr_linenumber" name="77" href="#77">77</a>  
-<a class="jxr_linenumber" name="78" href="#78">78</a>    <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/helix/manager/zk/CallbackHandler.html">CallbackHandler</a>(<a href="../../../../../org/apache/helix/HelixManager.html">HelixManager</a> manager,
-<a class="jxr_linenumber" name="79" href="#79">79</a>                           <a href="../../../../../org/apache/helix/manager/zk/ZkClient.html">ZkClient</a> client,
-<a class="jxr_linenumber" name="80" href="#80">80</a>                           String path,
-<a class="jxr_linenumber" name="81" href="#81">81</a>                           Object listener,
-<a class="jxr_linenumber" name="82" href="#82">82</a>                           EventType[] eventTypes,
-<a class="jxr_linenumber" name="83" href="#83">83</a>                           <a href="../../../../../org/apache/helix/HelixConstants.html">ChangeType</a> changeType)
-<a class="jxr_linenumber" name="84" href="#84">84</a>    {
-<a class="jxr_linenumber" name="85" href="#85">85</a>      <strong class="jxr_keyword">this</strong>._manager = manager;
-<a class="jxr_linenumber" name="86" href="#86">86</a>      <strong class="jxr_keyword">this</strong>._accessor = manager.getHelixDataAccessor();
-<a class="jxr_linenumber" name="87" href="#87">87</a>      <strong class="jxr_keyword">this</strong>._zkClient = client;
-<a class="jxr_linenumber" name="88" href="#88">88</a>      <strong class="jxr_keyword">this</strong>._path = path;
-<a class="jxr_linenumber" name="89" href="#89">89</a>      <strong class="jxr_keyword">this</strong>._listener = listener;
-<a class="jxr_linenumber" name="90" href="#90">90</a>      <strong class="jxr_keyword">this</strong>._eventTypes = eventTypes;
-<a class="jxr_linenumber" name="91" href="#91">91</a>      <strong class="jxr_keyword">this</strong>._changeType = changeType;
-<a class="jxr_linenumber" name="92" href="#92">92</a>      <strong class="jxr_keyword">this</strong>._lastNotificationTimeStamp = <strong class="jxr_keyword">new</strong> AtomicLong(System.nanoTime());
-<a class="jxr_linenumber" name="93" href="#93">93</a>      init();
-<a class="jxr_linenumber" name="94" href="#94">94</a>    }
-<a class="jxr_linenumber" name="95" href="#95">95</a>  
-<a class="jxr_linenumber" name="96" href="#96">96</a>    <strong class="jxr_keyword">public</strong> Object getListener()
-<a class="jxr_linenumber" name="97" href="#97">97</a>    {
-<a class="jxr_linenumber" name="98" href="#98">98</a>      <strong class="jxr_keyword">return</strong> _listener;
+<a class="jxr_linenumber" name="47" href="#47">47</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.InstanceConfigChangeListener;
+<a class="jxr_linenumber" name="48" href="#48">48</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.LiveInstanceChangeListener;
+<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.NotificationContext;
+<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.ScopedConfigChangeListener;
+<a class="jxr_linenumber" name="55" href="#55">55</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.ZNRecord;
+<a class="jxr_linenumber" name="56" href="#56">56</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.CurrentState;
+<a class="jxr_linenumber" name="57" href="#57">57</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.ExternalView;
+<a class="jxr_linenumber" name="58" href="#58">58</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.HealthStat;
+<a class="jxr_linenumber" name="59" href="#59">59</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.IdealState;
+<a class="jxr_linenumber" name="60" href="#60">60</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.InstanceConfig;
+<a class="jxr_linenumber" name="61" href="#61">61</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.LiveInstance;
+<a class="jxr_linenumber" name="62" href="#62">62</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.Message;
+<a class="jxr_linenumber" name="63" href="#63">63</a>  <strong class="jxr_keyword">import</strong> org.apache.log4j.Logger;
+<a class="jxr_linenumber" name="64" href="#64">64</a>  <strong class="jxr_keyword">import</strong> org.apache.zookeeper.Watcher.Event.EventType;
+<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/apache/helix/manager/zk/CallbackHandler.html">CallbackHandler</a> <strong class="jxr_keyword">implements</strong> IZkChildListener, IZkDataListener
+<a class="jxr_linenumber" name="67" href="#67">67</a>  
+<a class="jxr_linenumber" name="68" href="#68">68</a>  {
+<a class="jxr_linenumber" name="69" href="#69">69</a>  
+<a class="jxr_linenumber" name="70" href="#70">70</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> Logger           logger = Logger.getLogger(CallbackHandler.<strong class="jxr_keyword">class</strong>);
+<a class="jxr_linenumber" name="71" href="#71">71</a>  
+<a class="jxr_linenumber" name="72" href="#72">72</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> String            _path;
+<a class="jxr_linenumber" name="73" href="#73">73</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Object            _listener;
+<a class="jxr_linenumber" name="74" href="#74">74</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> EventType[]       _eventTypes;
+<a class="jxr_linenumber" name="75" href="#75">75</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/helix/HelixDataAccessor.html">HelixDataAccessor</a> _accessor;
+<a class="jxr_linenumber" name="76" href="#76">76</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/helix/HelixConstants.html">ChangeType</a>        _changeType;
+<a class="jxr_linenumber" name="77" href="#77">77</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/helix/manager/zk/ZkClient.html">ZkClient</a>          _zkClient;
+<a class="jxr_linenumber" name="78" href="#78">78</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> AtomicLong        _lastNotificationTimeStamp;
+<a class="jxr_linenumber" name="79" href="#79">79</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/helix/HelixManager.html">HelixManager</a>      _manager;
+<a class="jxr_linenumber" name="80" href="#80">80</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/helix/PropertyKey.html">PropertyKey</a> 	  _propertyKey;
+<a class="jxr_linenumber" name="81" href="#81">81</a>  
+<a class="jxr_linenumber" name="82" href="#82">82</a>    <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/helix/manager/zk/CallbackHandler.html">CallbackHandler</a>(<a href="../../../../../org/apache/helix/HelixManager.html">HelixManager</a> manager,
+<a class="jxr_linenumber" name="83" href="#83">83</a>                           <a href="../../../../../org/apache/helix/manager/zk/ZkClient.html">ZkClient</a> client,
+<a class="jxr_linenumber" name="84" href="#84">84</a>                           <a href="../../../../../org/apache/helix/PropertyKey.html">PropertyKey</a> propertyKey,
+<a class="jxr_linenumber" name="85" href="#85">85</a>                           Object listener,
+<a class="jxr_linenumber" name="86" href="#86">86</a>                           EventType[] eventTypes,
+<a class="jxr_linenumber" name="87" href="#87">87</a>                           <a href="../../../../../org/apache/helix/HelixConstants.html">ChangeType</a> changeType)
+<a class="jxr_linenumber" name="88" href="#88">88</a>    {
+<a class="jxr_linenumber" name="89" href="#89">89</a>      <strong class="jxr_keyword">this</strong>._manager = manager;
+<a class="jxr_linenumber" name="90" href="#90">90</a>      <strong class="jxr_keyword">this</strong>._accessor = manager.getHelixDataAccessor();
+<a class="jxr_linenumber" name="91" href="#91">91</a>      <strong class="jxr_keyword">this</strong>._zkClient = client;
+<a class="jxr_linenumber" name="92" href="#92">92</a>      <strong class="jxr_keyword">this</strong>._propertyKey = propertyKey;
+<a class="jxr_linenumber" name="93" href="#93">93</a>      <strong class="jxr_keyword">this</strong>._path = propertyKey.getPath();
+<a class="jxr_linenumber" name="94" href="#94">94</a>      <strong class="jxr_keyword">this</strong>._listener = listener;
+<a class="jxr_linenumber" name="95" href="#95">95</a>      <strong class="jxr_keyword">this</strong>._eventTypes = eventTypes;
+<a class="jxr_linenumber" name="96" href="#96">96</a>      <strong class="jxr_keyword">this</strong>._changeType = changeType;
+<a class="jxr_linenumber" name="97" href="#97">97</a>      <strong class="jxr_keyword">this</strong>._lastNotificationTimeStamp = <strong class="jxr_keyword">new</strong> AtomicLong(System.nanoTime());
+<a class="jxr_linenumber" name="98" href="#98">98</a>      init();
 <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>   <strong class="jxr_keyword">public</strong> String getPath()
+<a class="jxr_linenumber" name="101" href="#101">101</a>   <strong class="jxr_keyword">public</strong> Object getListener()
 <a class="jxr_linenumber" name="102" href="#102">102</a>   {
-<a class="jxr_linenumber" name="103" href="#103">103</a>     <strong class="jxr_keyword">return</strong> _path;
+<a class="jxr_linenumber" name="103" href="#103">103</a>     <strong class="jxr_keyword">return</strong> _listener;
 <a class="jxr_linenumber" name="104" href="#104">104</a>   }
 <a class="jxr_linenumber" name="105" href="#105">105</a> 
-<a class="jxr_linenumber" name="106" href="#106">106</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> invoke(<a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a> changeContext) <strong class="jxr_keyword">throws</strong> Exception
+<a class="jxr_linenumber" name="106" href="#106">106</a>   <strong class="jxr_keyword">public</strong> String getPath()
 <a class="jxr_linenumber" name="107" href="#107">107</a>   {
-<a class="jxr_linenumber" name="108" href="#108">108</a>     <em class="jxr_comment">// This allows the listener to work with one change at a time</em>
-<a class="jxr_linenumber" name="109" href="#109">109</a>     <strong class="jxr_keyword">synchronized</strong> (_manager)
-<a class="jxr_linenumber" name="110" href="#110">110</a>     {
-<a class="jxr_linenumber" name="111" href="#111">111</a>       <a href="../../../../../org/apache/helix/PropertyKey.html">Builder</a> keyBuilder = _accessor.keyBuilder();
-<a class="jxr_linenumber" name="112" href="#112">112</a>       <strong class="jxr_keyword">long</strong> start = System.currentTimeMillis();
-<a class="jxr_linenumber" name="113" href="#113">113</a>       <strong class="jxr_keyword">if</strong> (logger.isInfoEnabled())
-<a class="jxr_linenumber" name="114" href="#114">114</a>       {
-<a class="jxr_linenumber" name="115" href="#115">115</a>         logger.info(Thread.currentThread().getId() + <span class="jxr_string">" START:INVOKE "</span>
-<a class="jxr_linenumber" name="116" href="#116">116</a>             + _path + <span class="jxr_string">" listener:"</span> + _listener.getClass().getCanonicalName());
-<a class="jxr_linenumber" name="117" href="#117">117</a>       }
-<a class="jxr_linenumber" name="118" href="#118">118</a> 
-<a class="jxr_linenumber" name="119" href="#119">119</a>       <strong class="jxr_keyword">if</strong> (_changeType == IDEAL_STATE)
-<a class="jxr_linenumber" name="120" href="#120">120</a>       {
-<a class="jxr_linenumber" name="121" href="#121">121</a> 
-<a class="jxr_linenumber" name="122" href="#122">122</a>         <a href="../../../../../org/apache/helix/IdealStateChangeListener.html">IdealStateChangeListener</a> idealStateChangeListener =
-<a class="jxr_linenumber" name="123" href="#123">123</a>             (<a href="../../../../../org/apache/helix/IdealStateChangeListener.html">IdealStateChangeListener</a>) _listener;
-<a class="jxr_linenumber" name="124" href="#124">124</a>         subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, <strong class="jxr_keyword">true</strong>);
-<a class="jxr_linenumber" name="125" href="#125">125</a>         List&lt;IdealState&gt; idealStates = _accessor.getChildValues(keyBuilder.idealStates());
+<a class="jxr_linenumber" name="108" href="#108">108</a>     <strong class="jxr_keyword">return</strong> _path;
+<a class="jxr_linenumber" name="109" href="#109">109</a>   }
+<a class="jxr_linenumber" name="110" href="#110">110</a> 
+<a class="jxr_linenumber" name="111" href="#111">111</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> invoke(<a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a> changeContext) <strong class="jxr_keyword">throws</strong> Exception
+<a class="jxr_linenumber" name="112" href="#112">112</a>   {
+<a class="jxr_linenumber" name="113" href="#113">113</a>     <em class="jxr_comment">// This allows the listener to work with one change at a time</em>
+<a class="jxr_linenumber" name="114" href="#114">114</a>     <strong class="jxr_keyword">synchronized</strong> (_manager)
+<a class="jxr_linenumber" name="115" href="#115">115</a>     {
+<a class="jxr_linenumber" name="116" href="#116">116</a>       <em class="jxr_comment">// Builder keyBuilder = _accessor.keyBuilder();</em>
+<a class="jxr_linenumber" name="117" href="#117">117</a>       <strong class="jxr_keyword">long</strong> start = System.currentTimeMillis();
+<a class="jxr_linenumber" name="118" href="#118">118</a>       <strong class="jxr_keyword">if</strong> (logger.isInfoEnabled())
+<a class="jxr_linenumber" name="119" href="#119">119</a>       {
+<a class="jxr_linenumber" name="120" href="#120">120</a>         logger.info(Thread.currentThread().getId() + <span class="jxr_string">" START:INVOKE "</span>
+<a class="jxr_linenumber" name="121" href="#121">121</a>             + _path + <span class="jxr_string">" listener:"</span> + _listener.getClass().getCanonicalName());
+<a class="jxr_linenumber" name="122" href="#122">122</a>       }
+<a class="jxr_linenumber" name="123" href="#123">123</a> 
+<a class="jxr_linenumber" name="124" href="#124">124</a>       <strong class="jxr_keyword">if</strong> (_changeType == IDEAL_STATE)
+<a class="jxr_linenumber" name="125" href="#125">125</a>       {
 <a class="jxr_linenumber" name="126" href="#126">126</a> 
-<a class="jxr_linenumber" name="127" href="#127">127</a>         idealStateChangeListener.onIdealStateChange(idealStates, changeContext);
-<a class="jxr_linenumber" name="128" href="#128">128</a> 
-<a class="jxr_linenumber" name="129" href="#129">129</a>       }
-<a class="jxr_linenumber" name="130" href="#130">130</a>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (_changeType == CONFIG)
-<a class="jxr_linenumber" name="131" href="#131">131</a>       {
-<a class="jxr_linenumber" name="132" href="#132">132</a> 
-<a class="jxr_linenumber" name="133" href="#133">133</a>         <a href="../../../../../org/apache/helix/ConfigChangeListener.html">ConfigChangeListener</a> configChangeListener = (ConfigChangeListener) _listener;
-<a class="jxr_linenumber" name="134" href="#134">134</a>         subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, <strong class="jxr_keyword">true</strong>);
-<a class="jxr_linenumber" name="135" href="#135">135</a>         List&lt;InstanceConfig&gt; configs =
-<a class="jxr_linenumber" name="136" href="#136">136</a>             _accessor.getChildValues(keyBuilder.instanceConfigs());
-<a class="jxr_linenumber" name="137" href="#137">137</a> 
-<a class="jxr_linenumber" name="138" href="#138">138</a>         configChangeListener.onConfigChange(configs, changeContext);
-<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">else</strong> <strong class="jxr_keyword">if</strong> (_changeType == LIVE_INSTANCE)
-<a class="jxr_linenumber" name="142" href="#142">142</a>       {
-<a class="jxr_linenumber" name="143" href="#143">143</a>         <a href="../../../../../org/apache/helix/LiveInstanceChangeListener.html">LiveInstanceChangeListener</a> liveInstanceChangeListener =
-<a class="jxr_linenumber" name="144" href="#144">144</a>             (<a href="../../../../../org/apache/helix/LiveInstanceChangeListener.html">LiveInstanceChangeListener</a>) _listener;
-<a class="jxr_linenumber" name="145" href="#145">145</a>         subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, <strong class="jxr_keyword">true</strong>);
-<a class="jxr_linenumber" name="146" href="#146">146</a>         List&lt;LiveInstance&gt; liveInstances =
-<a class="jxr_linenumber" name="147" href="#147">147</a>             _accessor.getChildValues(keyBuilder.liveInstances());
-<a class="jxr_linenumber" name="148" href="#148">148</a> 
-<a class="jxr_linenumber" name="149" href="#149">149</a>         liveInstanceChangeListener.onLiveInstanceChange(liveInstances, changeContext);
-<a class="jxr_linenumber" name="150" href="#150">150</a> 
-<a class="jxr_linenumber" name="151" href="#151">151</a>       }
-<a class="jxr_linenumber" name="152" href="#152">152</a>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (_changeType == CURRENT_STATE)
-<a class="jxr_linenumber" name="153" href="#153">153</a>       {
-<a class="jxr_linenumber" name="154" href="#154">154</a>         <a href="../../../../../org/apache/helix/CurrentStateChangeListener.html">CurrentStateChangeListener</a> currentStateChangeListener;
-<a class="jxr_linenumber" name="155" href="#155">155</a>         currentStateChangeListener = (CurrentStateChangeListener) _listener;
-<a class="jxr_linenumber" name="156" href="#156">156</a>         subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, <strong class="jxr_keyword">true</strong>);
-<a class="jxr_linenumber" name="157" href="#157">157</a>         String instanceName = PropertyPathConfig.getInstanceNameFromPath(_path);
-<a class="jxr_linenumber" name="158" href="#158">158</a>         String[] pathParts = _path.split(<span class="jxr_string">"/"</span>);
-<a class="jxr_linenumber" name="159" href="#159">159</a> 
-<a class="jxr_linenumber" name="160" href="#160">160</a>         <em class="jxr_comment">// TODO: fix this</em>
-<a class="jxr_linenumber" name="161" href="#161">161</a>         List&lt;CurrentState&gt; currentStates =
-<a class="jxr_linenumber" name="162" href="#162">162</a>             _accessor.getChildValues(keyBuilder.currentStates(instanceName,
-<a class="jxr_linenumber" name="163" href="#163">163</a>                                                               pathParts[pathParts.length - 1]));
+<a class="jxr_linenumber" name="127" href="#127">127</a>         <a href="../../../../../org/apache/helix/IdealStateChangeListener.html">IdealStateChangeListener</a> idealStateChangeListener =
+<a class="jxr_linenumber" name="128" href="#128">128</a>             (<a href="../../../../../org/apache/helix/IdealStateChangeListener.html">IdealStateChangeListener</a>) _listener;
+<a class="jxr_linenumber" name="129" href="#129">129</a>         subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, <strong class="jxr_keyword">true</strong>);
+<a class="jxr_linenumber" name="130" href="#130">130</a>         List&lt;IdealState&gt; idealStates = _accessor.getChildValues(_propertyKey);
+<a class="jxr_linenumber" name="131" href="#131">131</a> 
+<a class="jxr_linenumber" name="132" href="#132">132</a>         idealStateChangeListener.onIdealStateChange(idealStates, changeContext);
+<a class="jxr_linenumber" name="133" href="#133">133</a> 
+<a class="jxr_linenumber" name="134" href="#134">134</a>       }
+<a class="jxr_linenumber" name="135" href="#135">135</a>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (_changeType == ChangeType.INSTANCE_CONFIG)
+<a class="jxr_linenumber" name="136" href="#136">136</a>       {
+<a class="jxr_linenumber" name="137" href="#137">137</a>         subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, <strong class="jxr_keyword">true</strong>);
+<a class="jxr_linenumber" name="138" href="#138">138</a>       	<strong class="jxr_keyword">if</strong> (_listener instanceof ConfigChangeListener)
+<a class="jxr_linenumber" name="139" href="#139">139</a>       	{
+<a class="jxr_linenumber" name="140" href="#140">140</a>       		ConfigChangeListener configChangeListener = (ConfigChangeListener) _listener;
+<a class="jxr_linenumber" name="141" href="#141">141</a>       		List&lt;InstanceConfig&gt; configs = _accessor.getChildValues(_propertyKey);
+<a class="jxr_linenumber" name="142" href="#142">142</a>       		configChangeListener.onConfigChange(configs, changeContext);
+<a class="jxr_linenumber" name="143" href="#143">143</a>       	} <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (_listener instanceof InstanceConfigChangeListener)
+<a class="jxr_linenumber" name="144" href="#144">144</a>       	{
+<a class="jxr_linenumber" name="145" href="#145">145</a>       		InstanceConfigChangeListener listener = (InstanceConfigChangeListener) _listener;
+<a class="jxr_linenumber" name="146" href="#146">146</a>       		List&lt;InstanceConfig&gt; configs = _accessor.getChildValues(_propertyKey);
+<a class="jxr_linenumber" name="147" href="#147">147</a>       		listener.onInstanceConfigChange(configs, changeContext);    		
+<a class="jxr_linenumber" name="148" href="#148">148</a>       	}	  
+<a class="jxr_linenumber" name="149" href="#149">149</a>       }
+<a class="jxr_linenumber" name="150" href="#150">150</a>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (_changeType == CONFIG)
+<a class="jxr_linenumber" name="151" href="#151">151</a>       {
+<a class="jxr_linenumber" name="152" href="#152">152</a>             subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, <strong class="jxr_keyword">true</strong>);
+<a class="jxr_linenumber" name="153" href="#153">153</a>       		ScopedConfigChangeListener listener = (ScopedConfigChangeListener) _listener;
+<a class="jxr_linenumber" name="154" href="#154">154</a>       		List&lt;HelixProperty&gt; configs = _accessor.getChildValues(_propertyKey);
+<a class="jxr_linenumber" name="155" href="#155">155</a>       		listener.onConfigChange(configs, changeContext);
+<a class="jxr_linenumber" name="156" href="#156">156</a>       }
+<a class="jxr_linenumber" name="157" href="#157">157</a>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (_changeType == LIVE_INSTANCE)
+<a class="jxr_linenumber" name="158" href="#158">158</a>       {
+<a class="jxr_linenumber" name="159" href="#159">159</a>         <a href="../../../../../org/apache/helix/LiveInstanceChangeListener.html">LiveInstanceChangeListener</a> liveInstanceChangeListener =
+<a class="jxr_linenumber" name="160" href="#160">160</a>             (<a href="../../../../../org/apache/helix/LiveInstanceChangeListener.html">LiveInstanceChangeListener</a>) _listener;
+<a class="jxr_linenumber" name="161" href="#161">161</a>         subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, <strong class="jxr_keyword">true</strong>);
+<a class="jxr_linenumber" name="162" href="#162">162</a>         List&lt;LiveInstance&gt; liveInstances =
+<a class="jxr_linenumber" name="163" href="#163">163</a>             _accessor.getChildValues(_propertyKey);
 <a class="jxr_linenumber" name="164" href="#164">164</a> 
-<a class="jxr_linenumber" name="165" href="#165">165</a>         currentStateChangeListener.onStateChange(instanceName,
-<a class="jxr_linenumber" name="166" href="#166">166</a>                                                  currentStates,
-<a class="jxr_linenumber" name="167" href="#167">167</a>                                                  changeContext);
-<a class="jxr_linenumber" name="168" href="#168">168</a> 
-<a class="jxr_linenumber" name="169" href="#169">169</a>       }
-<a class="jxr_linenumber" name="170" href="#170">170</a>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (_changeType == MESSAGE)
-<a class="jxr_linenumber" name="171" href="#171">171</a>       {
-<a class="jxr_linenumber" name="172" href="#172">172</a>         <a href="../../../../../org/apache/helix/MessageListener.html">MessageListener</a> messageListener = (MessageListener) _listener;
-<a class="jxr_linenumber" name="173" href="#173">173</a>         subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, false);
-<a class="jxr_linenumber" name="174" href="#174">174</a>         String instanceName = PropertyPathConfig.getInstanceNameFromPath(_path);
-<a class="jxr_linenumber" name="175" href="#175">175</a>         List&lt;Message&gt; messages =
-<a class="jxr_linenumber" name="176" href="#176">176</a>             _accessor.getChildValues(keyBuilder.messages(instanceName));
-<a class="jxr_linenumber" name="177" href="#177">177</a> 
-<a class="jxr_linenumber" name="178" href="#178">178</a>         messageListener.onMessage(instanceName, messages, changeContext);
+<a class="jxr_linenumber" name="165" href="#165">165</a>         liveInstanceChangeListener.onLiveInstanceChange(liveInstances, changeContext);
+<a class="jxr_linenumber" name="166" href="#166">166</a> 
+<a class="jxr_linenumber" name="167" href="#167">167</a>       }
+<a class="jxr_linenumber" name="168" href="#168">168</a>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (_changeType == CURRENT_STATE)
+<a class="jxr_linenumber" name="169" href="#169">169</a>       {
+<a class="jxr_linenumber" name="170" href="#170">170</a>         <a href="../../../../../org/apache/helix/CurrentStateChangeListener.html">CurrentStateChangeListener</a> currentStateChangeListener = (CurrentStateChangeListener) _listener;
+<a class="jxr_linenumber" name="171" href="#171">171</a>         subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, <strong class="jxr_keyword">true</strong>);
+<a class="jxr_linenumber" name="172" href="#172">172</a>         String instanceName = PropertyPathConfig.getInstanceNameFromPath(_path);
+<a class="jxr_linenumber" name="173" href="#173">173</a> 
+<a class="jxr_linenumber" name="174" href="#174">174</a>         List&lt;CurrentState&gt; currentStates = _accessor.getChildValues(_propertyKey);
+<a class="jxr_linenumber" name="175" href="#175">175</a> 
+<a class="jxr_linenumber" name="176" href="#176">176</a>         currentStateChangeListener.onStateChange(instanceName,
+<a class="jxr_linenumber" name="177" href="#177">177</a>                                                  currentStates,
+<a class="jxr_linenumber" name="178" href="#178">178</a>                                                  changeContext);
 <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>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (_changeType == MESSAGES_CONTROLLER)
+<a class="jxr_linenumber" name="181" href="#181">181</a>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (_changeType == MESSAGE)
 <a class="jxr_linenumber" name="182" href="#182">182</a>       {
 <a class="jxr_linenumber" name="183" href="#183">183</a>         <a href="../../../../../org/apache/helix/MessageListener.html">MessageListener</a> messageListener = (MessageListener) _listener;
 <a class="jxr_linenumber" name="184" href="#184">184</a>         subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, false);
-<a class="jxr_linenumber" name="185" href="#185">185</a>         List&lt;Message&gt; messages =
-<a class="jxr_linenumber" name="186" href="#186">186</a>             _accessor.getChildValues(keyBuilder.controllerMessages());
-<a class="jxr_linenumber" name="187" href="#187">187</a> 
-<a class="jxr_linenumber" name="188" href="#188">188</a>         messageListener.onMessage(_manager.getInstanceName(), messages, changeContext);
-<a class="jxr_linenumber" name="189" href="#189">189</a> 
-<a class="jxr_linenumber" name="190" href="#190">190</a>       }
-<a class="jxr_linenumber" name="191" href="#191">191</a>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (_changeType == EXTERNAL_VIEW)
-<a class="jxr_linenumber" name="192" href="#192">192</a>       {
-<a class="jxr_linenumber" name="193" href="#193">193</a>         <a href="../../../../../org/apache/helix/ExternalViewChangeListener.html">ExternalViewChangeListener</a> externalViewListener =
-<a class="jxr_linenumber" name="194" href="#194">194</a>             (<a href="../../../../../org/apache/helix/ExternalViewChangeListener.html">ExternalViewChangeListener</a>) _listener;
-<a class="jxr_linenumber" name="195" href="#195">195</a>         subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, <strong class="jxr_keyword">true</strong>);
-<a class="jxr_linenumber" name="196" href="#196">196</a>         List&lt;ExternalView&gt; externalViewList =
-<a class="jxr_linenumber" name="197" href="#197">197</a>             _accessor.getChildValues(keyBuilder.externalViews());
+<a class="jxr_linenumber" name="185" href="#185">185</a>         String instanceName = PropertyPathConfig.getInstanceNameFromPath(_path);
+<a class="jxr_linenumber" name="186" href="#186">186</a>         List&lt;Message&gt; messages =
+<a class="jxr_linenumber" name="187" href="#187">187</a>             _accessor.getChildValues(_propertyKey);
+<a class="jxr_linenumber" name="188" href="#188">188</a> 
+<a class="jxr_linenumber" name="189" href="#189">189</a>         messageListener.onMessage(instanceName, messages, changeContext);
+<a class="jxr_linenumber" name="190" href="#190">190</a> 
+<a class="jxr_linenumber" name="191" href="#191">191</a>       }
+<a class="jxr_linenumber" name="192" href="#192">192</a>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (_changeType == MESSAGES_CONTROLLER)
+<a class="jxr_linenumber" name="193" href="#193">193</a>       {
+<a class="jxr_linenumber" name="194" href="#194">194</a>         <a href="../../../../../org/apache/helix/MessageListener.html">MessageListener</a> messageListener = (MessageListener) _listener;
+<a class="jxr_linenumber" name="195" href="#195">195</a>         subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, false);
+<a class="jxr_linenumber" name="196" href="#196">196</a>         List&lt;Message&gt; messages =
+<a class="jxr_linenumber" name="197" href="#197">197</a>             _accessor.getChildValues(_propertyKey);
 <a class="jxr_linenumber" name="198" href="#198">198</a> 
-<a class="jxr_linenumber" name="199" href="#199">199</a>         externalViewListener.onExternalViewChange(externalViewList, changeContext);
-<a class="jxr_linenumber" name="200" href="#200">200</a>       }
-<a class="jxr_linenumber" name="201" href="#201">201</a>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (_changeType == ChangeType.CONTROLLER)
-<a class="jxr_linenumber" name="202" href="#202">202</a>       {
-<a class="jxr_linenumber" name="203" href="#203">203</a>         <a href="../../../../../org/apache/helix/ControllerChangeListener.html">ControllerChangeListener</a> controllerChangelistener =
-<a class="jxr_linenumber" name="204" href="#204">204</a>             (<a href="../../../../../org/apache/helix/ControllerChangeListener.html">ControllerChangeListener</a>) _listener;
-<a class="jxr_linenumber" name="205" href="#205">205</a>         subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, false);
-<a class="jxr_linenumber" name="206" href="#206">206</a>         controllerChangelistener.onControllerChange(changeContext);
-<a class="jxr_linenumber" name="207" href="#207">207</a>       }
-<a class="jxr_linenumber" name="208" href="#208">208</a>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (_changeType == ChangeType.HEALTH)
-<a class="jxr_linenumber" name="209" href="#209">209</a>       {
-<a class="jxr_linenumber" name="210" href="#210">210</a>         <a href="../../../../../org/apache/helix/HealthStateChangeListener.html">HealthStateChangeListener</a> healthStateChangeListener =
-<a class="jxr_linenumber" name="211" href="#211">211</a>             (<a href="../../../../../org/apache/helix/HealthStateChangeListener.html">HealthStateChangeListener</a>) _listener;
-<a class="jxr_linenumber" name="212" href="#212">212</a>         subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, <strong class="jxr_keyword">true</strong>); <em class="jxr_comment">// TODO: figure out</em>
-<a class="jxr_linenumber" name="213" href="#213">213</a>         <em class="jxr_comment">// settings here</em>
-<a class="jxr_linenumber" name="214" href="#214">214</a>         String instanceName = PropertyPathConfig.getInstanceNameFromPath(_path);
-<a class="jxr_linenumber" name="215" href="#215">215</a> 
-<a class="jxr_linenumber" name="216" href="#216">216</a>         List&lt;HealthStat&gt; healthReportList =
-<a class="jxr_linenumber" name="217" href="#217">217</a>             _accessor.getChildValues(keyBuilder.healthReports(instanceName));
-<a class="jxr_linenumber" name="218" href="#218">218</a> 
-<a class="jxr_linenumber" name="219" href="#219">219</a>         healthStateChangeListener.onHealthChange(instanceName,
-<a class="jxr_linenumber" name="220" href="#220">220</a>                                                  healthReportList,
-<a class="jxr_linenumber" name="221" href="#221">221</a>                                                  changeContext);
-<a class="jxr_linenumber" name="222" href="#222">222</a>       }
-<a class="jxr_linenumber" name="223" href="#223">223</a>       <strong class="jxr_keyword">long</strong> end = System.currentTimeMillis();
-<a class="jxr_linenumber" name="224" href="#224">224</a>       <strong class="jxr_keyword">if</strong> (logger.isInfoEnabled())
-<a class="jxr_linenumber" name="225" href="#225">225</a>       {
-<a class="jxr_linenumber" name="226" href="#226">226</a>         logger.info(Thread.currentThread().getId() + <span class="jxr_string">" END:INVOKE "</span> + _path
-<a class="jxr_linenumber" name="227" href="#227">227</a>             + <span class="jxr_string">" listener:"</span> + _listener.getClass().getCanonicalName() + <span class="jxr_string">" Took: "</span>
-<a class="jxr_linenumber" name="228" href="#228">228</a>             + (end - start) +<span class="jxr_string">"ms"</span>);
-<a class="jxr_linenumber" name="229" href="#229">229</a>       }
-<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>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> subscribeChildChange(String path, <a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a> context)
-<a class="jxr_linenumber" name="234" href="#234">234</a>   {
-<a class="jxr_linenumber" name="235" href="#235">235</a> 	  NotificationContext.Type type = context.getType();
-<a class="jxr_linenumber" name="236" href="#236">236</a>       <strong class="jxr_keyword">if</strong> (type == NotificationContext.Type.INIT || type == NotificationContext.Type.CALLBACK)
-<a class="jxr_linenumber" name="237" href="#237">237</a>       {
-<a class="jxr_linenumber" name="238" href="#238">238</a>         logger.info(_manager.getInstanceName() + <span class="jxr_string">" subscribes child-change. path: "</span> 
-<a class="jxr_linenumber" name="239" href="#239">239</a>         		+ path + <span class="jxr_string">", listener: "</span> + _listener);
-<a class="jxr_linenumber" name="240" href="#240">240</a>         _zkClient.subscribeChildChanges(path, <strong class="jxr_keyword">this</strong>);
-<a class="jxr_linenumber" name="241" href="#241">241</a>       }
-<a class="jxr_linenumber" name="242" href="#242">242</a>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (type == NotificationContext.Type.FINALIZE)
-<a class="jxr_linenumber" name="243" href="#243">243</a>       {
-<a class="jxr_linenumber" name="244" href="#244">244</a>         logger.info(_manager.getInstanceName() + <span class="jxr_string">" unsubscribe child-change. path: "</span> 
-<a class="jxr_linenumber" name="245" href="#245">245</a>         		+ path + <span class="jxr_string">", listener: "</span> + _listener);
-<a class="jxr_linenumber" name="246" href="#246">246</a>         _zkClient.unsubscribeChildChanges(path, <strong class="jxr_keyword">this</strong>);
-<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>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> subscribeDataChange(String path, <a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a> context)
-<a class="jxr_linenumber" name="251" href="#251">251</a>   {
-<a class="jxr_linenumber" name="252" href="#252">252</a>     	NotificationContext.Type type = context.getType();
-<a class="jxr_linenumber" name="253" href="#253">253</a>         <strong class="jxr_keyword">if</strong> (type == NotificationContext.Type.INIT
-<a class="jxr_linenumber" name="254" href="#254">254</a>             || type == NotificationContext.Type.CALLBACK)
-<a class="jxr_linenumber" name="255" href="#255">255</a>         {
-<a class="jxr_linenumber" name="256" href="#256">256</a>           <strong class="jxr_keyword">if</strong> (logger.isDebugEnabled())
-<a class="jxr_linenumber" name="257" href="#257">257</a>           {
-<a class="jxr_linenumber" name="258" href="#258">258</a>             logger.debug(_manager.getInstanceName() + <span class="jxr_string">" subscribe data-change. path: "</span> 
-<a class="jxr_linenumber" name="259" href="#259">259</a>             		+ path + <span class="jxr_string">", listener: "</span> + _listener);
-<a class="jxr_linenumber" name="260" href="#260">260</a>           }
-<a class="jxr_linenumber" name="261" href="#261">261</a>           _zkClient.subscribeDataChanges(path, <strong class="jxr_keyword">this</strong>);
-<a class="jxr_linenumber" name="262" href="#262">262</a> 
-<a class="jxr_linenumber" name="263" href="#263">263</a>         }
-<a class="jxr_linenumber" name="264" href="#264">264</a>         <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (type == NotificationContext.Type.FINALIZE)
-<a class="jxr_linenumber" name="265" href="#265">265</a>         {
-<a class="jxr_linenumber" name="266" href="#266">266</a>           logger.info(_manager.getInstanceName() + <span class="jxr_string">" unsubscribe data-change. path: "</span> 
-<a class="jxr_linenumber" name="267" href="#267">267</a>         		  + path + <span class="jxr_string">", listener: "</span> + _listener);
-<a class="jxr_linenumber" name="268" href="#268">268</a>           _zkClient.unsubscribeDataChanges(path, <strong class="jxr_keyword">this</strong>);
-<a class="jxr_linenumber" name="269" href="#269">269</a>         }
-<a class="jxr_linenumber" name="270" href="#270">270</a>   }
-<a class="jxr_linenumber" name="271" href="#271">271</a>   
-<a class="jxr_linenumber" name="272" href="#272">272</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> subscribeForChanges(<a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a> context,
-<a class="jxr_linenumber" name="273" href="#273">273</a>                                    String path,
-<a class="jxr_linenumber" name="274" href="#274">274</a>                                    <strong class="jxr_keyword">boolean</strong> watchParent,
-<a class="jxr_linenumber" name="275" href="#275">275</a>                                    <strong class="jxr_keyword">boolean</strong> watchChild)
-<a class="jxr_linenumber" name="276" href="#276">276</a>   {
-<a class="jxr_linenumber" name="277" href="#277">277</a>     <strong class="jxr_keyword">if</strong> (watchParent)
-<a class="jxr_linenumber" name="278" href="#278">278</a>     {
-<a class="jxr_linenumber" name="279" href="#279">279</a>     	subscribeChildChange(path, context);
-<a class="jxr_linenumber" name="280" href="#280">280</a>     }
-<a class="jxr_linenumber" name="281" href="#281">281</a> 
-<a class="jxr_linenumber" name="282" href="#282">282</a>     <strong class="jxr_keyword">if</strong> (watchChild)
-<a class="jxr_linenumber" name="283" href="#283">283</a>     {
-<a class="jxr_linenumber" name="284" href="#284">284</a>       <strong class="jxr_keyword">try</strong>
-<a class="jxr_linenumber" name="285" href="#285">285</a>       {
-<a class="jxr_linenumber" name="286" href="#286">286</a>     	<strong class="jxr_keyword">switch</strong>(_changeType)
-<a class="jxr_linenumber" name="287" href="#287">287</a>     	{
-<a class="jxr_linenumber" name="288" href="#288">288</a>         <strong class="jxr_keyword">case</strong> CURRENT_STATE:
-<a class="jxr_linenumber" name="289" href="#289">289</a>         <strong class="jxr_keyword">case</strong> IDEAL_STATE:
-<a class="jxr_linenumber" name="290" href="#290">290</a>         <strong class="jxr_keyword">case</strong> EXTERNAL_VIEW:
-<a class="jxr_linenumber" name="291" href="#291">291</a>         {
-<a class="jxr_linenumber" name="292" href="#292">292</a>             <em class="jxr_comment">// check if bucketized</em>
-<a class="jxr_linenumber" name="293" href="#293">293</a>         	BaseDataAccessor&lt;ZNRecord&gt; baseAccessor = <strong class="jxr_keyword">new</strong> ZkBaseDataAccessor&lt;ZNRecord&gt;(_zkClient);
-<a class="jxr_linenumber" name="294" href="#294">294</a>         	List&lt;ZNRecord&gt; records = baseAccessor.getChildren(path, <strong class="jxr_keyword">null</strong>, 0);
-<a class="jxr_linenumber" name="295" href="#295">295</a>         	<strong class="jxr_keyword">for</strong> (ZNRecord record : records)
-<a class="jxr_linenumber" name="296" href="#296">296</a>         	{
-<a class="jxr_linenumber" name="297" href="#297">297</a>                 <a href="../../../../../org/apache/helix/HelixProperty.html">HelixProperty</a> property = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/HelixProperty.html">HelixProperty</a>(record);
-<a class="jxr_linenumber" name="298" href="#298">298</a>             	String childPath = path + <span class="jxr_string">"/"</span> + record.getId();
-<a class="jxr_linenumber" name="299" href="#299">299</a> 
-<a class="jxr_linenumber" name="300" href="#300">300</a>                 <strong class="jxr_keyword">int</strong> bucketSize = property.getBucketSize();
-<a class="jxr_linenumber" name="301" href="#301">301</a>                 <strong class="jxr_keyword">if</strong> (bucketSize &gt; 0)
-<a class="jxr_linenumber" name="302" href="#302">302</a>                 {
-<a class="jxr_linenumber" name="303" href="#303">303</a>                   <em class="jxr_comment">// subscribe both data-change and child-change on bucketized parent node</em>
-<a class="jxr_linenumber" name="304" href="#304">304</a>                   <em class="jxr_comment">// data-change gives a delete-callback which is used to remove watch</em>
-<a class="jxr_linenumber" name="305" href="#305">305</a>                   subscribeChildChange(childPath, context);
-<a class="jxr_linenumber" name="306" href="#306">306</a>                   subscribeDataChange(childPath, context);
-<a class="jxr_linenumber" name="307" href="#307">307</a>                   
-<a class="jxr_linenumber" name="308" href="#308">308</a>                   <em class="jxr_comment">// subscribe data-change on bucketized child</em>
-<a class="jxr_linenumber" name="309" href="#309">309</a>                   List&lt;String&gt; bucketizedChildNames = _zkClient.getChildren(childPath);
-<a class="jxr_linenumber" name="310" href="#310">310</a>                   <strong class="jxr_keyword">if</strong> (bucketizedChildNames != <strong class="jxr_keyword">null</strong>) 
-<a class="jxr_linenumber" name="311" href="#311">311</a>                   {
-<a class="jxr_linenumber" name="312" href="#312">312</a>                     <strong class="jxr_keyword">for</strong> (String bucketizedChildName : bucketizedChildNames)
-<a class="jxr_linenumber" name="313" href="#313">313</a>                     {
-<a class="jxr_linenumber" name="314" href="#314">314</a>                        String bucketizedChildPath = childPath + <span class="jxr_string">"/"</span> + bucketizedChildName;
-<a class="jxr_linenumber" name="315" href="#315">315</a>                        subscribeDataChange(bucketizedChildPath, context);
-<a class="jxr_linenumber" name="316" href="#316">316</a>                     }  
-<a class="jxr_linenumber" name="317" href="#317">317</a>                   }
-<a class="jxr_linenumber" name="318" href="#318">318</a>                 } <strong class="jxr_keyword">else</strong>
-<a class="jxr_linenumber" name="319" href="#319">319</a>                 {
-<a class="jxr_linenumber" name="320" href="#320">320</a>                     subscribeDataChange(childPath, context);
-<a class="jxr_linenumber" name="321" href="#321">321</a>                 }
-<a class="jxr_linenumber" name="322" href="#322">322</a>         	}
-<a class="jxr_linenumber" name="323" href="#323">323</a>         	<strong class="jxr_keyword">break</strong>;
-<a class="jxr_linenumber" name="324" href="#324">324</a>         }
-<a class="jxr_linenumber" name="325" href="#325">325</a>         <strong class="jxr_keyword">default</strong>:
-<a class="jxr_linenumber" name="326" href="#326">326</a>         {
-<a class="jxr_linenumber" name="327" href="#327">327</a>             List&lt;String&gt; childNames = _zkClient.getChildren(path);
-<a class="jxr_linenumber" name="328" href="#328">328</a>             <strong class="jxr_keyword">if</strong> (childNames != <strong class="jxr_keyword">null</strong>) 
-<a class="jxr_linenumber" name="329" href="#329">329</a>             {
-<a class="jxr_linenumber" name="330" href="#330">330</a>               <strong class="jxr_keyword">for</strong> (String childName : childNames)
-<a class="jxr_linenumber" name="331" href="#331">331</a>               {
-<a class="jxr_linenumber" name="332" href="#332">332</a>                  String childPath = path + <span class="jxr_string">"/"</span> + childName;
-<a class="jxr_linenumber" name="333" href="#333">333</a>                  subscribeDataChange(childPath, context);
-<a class="jxr_linenumber" name="334" href="#334">334</a>               }  
-<a class="jxr_linenumber" name="335" href="#335">335</a>             }
-<a class="jxr_linenumber" name="336" href="#336">336</a>         	<strong class="jxr_keyword">break</strong>;
-<a class="jxr_linenumber" name="337" href="#337">337</a>         }
-<a class="jxr_linenumber" name="338" href="#338">338</a>     	}
-<a class="jxr_linenumber" name="339" href="#339">339</a>       }
-<a class="jxr_linenumber" name="340" href="#340">340</a>       <strong class="jxr_keyword">catch</strong> (ZkNoNodeException e)
-<a class="jxr_linenumber" name="341" href="#341">341</a>       {
-<a class="jxr_linenumber" name="342" href="#342">342</a>         logger.warn(<span class="jxr_string">"fail to subscribe child/data change@"</span> + path, e);
-<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> 
-<a class="jxr_linenumber" name="346" href="#346">346</a>   }
-<a class="jxr_linenumber" name="347" href="#347">347</a> 
-<a class="jxr_linenumber" name="348" href="#348">348</a>   <strong class="jxr_keyword">public</strong> EventType[] getEventTypes()
-<a class="jxr_linenumber" name="349" href="#349">349</a>   {
-<a class="jxr_linenumber" name="350" href="#350">350</a>     <strong class="jxr_keyword">return</strong> _eventTypes;
-<a class="jxr_linenumber" name="351" href="#351">351</a>   }
-<a class="jxr_linenumber" name="352" href="#352">352</a> 
-<a class="jxr_linenumber" name="353" href="#353">353</a>   <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="354" href="#354">354</a> <em class="jxr_javadoccomment">   * Invoke the listener so that it sets up the initial values from the zookeeper if any</em>
-<a class="jxr_linenumber" name="355" href="#355">355</a> <em class="jxr_javadoccomment">   * exists</em>
-<a class="jxr_linenumber" name="356" href="#356">356</a> <em class="jxr_javadoccomment">   * </em>
-<a class="jxr_linenumber" name="357" href="#357">357</a> <em class="jxr_javadoccomment">   */</em>
-<a class="jxr_linenumber" name="358" href="#358">358</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> init()
-<a class="jxr_linenumber" name="359" href="#359">359</a>   {
-<a class="jxr_linenumber" name="360" href="#360">360</a>     updateNotificationTime(System.nanoTime());
-<a class="jxr_linenumber" name="361" href="#361">361</a>     <strong class="jxr_keyword">try</strong>
-<a class="jxr_linenumber" name="362" href="#362">362</a>     {
-<a class="jxr_linenumber" name="363" href="#363">363</a>       <a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a> changeContext = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a>(_manager);
-<a class="jxr_linenumber" name="364" href="#364">364</a>       changeContext.setType(NotificationContext.Type.INIT);
-<a class="jxr_linenumber" name="365" href="#365">365</a>       invoke(changeContext);
-<a class="jxr_linenumber" name="366" href="#366">366</a>     }
-<a class="jxr_linenumber" name="367" href="#367">367</a>     <strong class="jxr_keyword">catch</strong> (Exception e)
-<a class="jxr_linenumber" name="368" href="#368">368</a>     {
-<a class="jxr_linenumber" name="369" href="#369">369</a>       ZKExceptionHandler.getInstance().handle(e);
-<a class="jxr_linenumber" name="370" href="#370">370</a>     }
-<a class="jxr_linenumber" name="371" href="#371">371</a>   }
-<a class="jxr_linenumber" name="372" href="#372">372</a> 
-<a class="jxr_linenumber" name="373" href="#373">373</a>   @Override
-<a class="jxr_linenumber" name="374" href="#374">374</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> handleDataChange(String dataPath, Object data)
-<a class="jxr_linenumber" name="375" href="#375">375</a>   {
-<a class="jxr_linenumber" name="376" href="#376">376</a>     <strong class="jxr_keyword">try</strong>
-<a class="jxr_linenumber" name="377" href="#377">377</a>     {
-<a class="jxr_linenumber" name="378" href="#378">378</a>       updateNotificationTime(System.nanoTime());
-<a class="jxr_linenumber" name="379" href="#379">379</a>       <strong class="jxr_keyword">if</strong> (dataPath != <strong class="jxr_keyword">null</strong> &amp;&amp; dataPath.startsWith(_path))
-<a class="jxr_linenumber" name="380" href="#380">380</a>       {
-<a class="jxr_linenumber" name="381" href="#381">381</a>         <a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a> changeContext = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a>(_manager);
-<a class="jxr_linenumber" name="382" href="#382">382</a>         changeContext.setType(NotificationContext.Type.CALLBACK);
-<a class="jxr_linenumber" name="383" href="#383">383</a>         invoke(changeContext);
-<a class="jxr_linenumber" name="384" href="#384">384</a>       }
-<a class="jxr_linenumber" name="385" href="#385">385</a>     }
-<a class="jxr_linenumber" name="386" href="#386">386</a>     <strong class="jxr_keyword">catch</strong> (Exception e)
-<a class="jxr_linenumber" name="387" href="#387">387</a>     {
-<a class="jxr_linenumber" name="388" href="#388">388</a>       ZKExceptionHandler.getInstance().handle(e);
-<a class="jxr_linenumber" name="389" href="#389">389</a>     }
-<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> <strong class="jxr_keyword">void</strong> handleDataDeleted(String dataPath)
-<a class="jxr_linenumber" name="394" href="#394">394</a>   {
-<a class="jxr_linenumber" name="395" href="#395">395</a>     <strong class="jxr_keyword">try</strong>
-<a class="jxr_linenumber" name="396" href="#396">396</a>     {
-<a class="jxr_linenumber" name="397" href="#397">397</a>       updateNotificationTime(System.nanoTime());
-<a class="jxr_linenumber" name="398" href="#398">398</a>       <strong class="jxr_keyword">if</strong> (dataPath != <strong class="jxr_keyword">null</strong> &amp;&amp; dataPath.startsWith(_path))
-<a class="jxr_linenumber" name="399" href="#399">399</a>       {
-<a class="jxr_linenumber" name="400" href="#400">400</a>           logger.info(_manager.getInstanceName() + <span class="jxr_string">" unsubscribe data-change. path: "</span> 
-<a class="jxr_linenumber" name="401" href="#401">401</a>         		  + dataPath + <span class="jxr_string">", listener: "</span> + _listener);
-<a class="jxr_linenumber" name="402" href="#402">402</a>           _zkClient.unsubscribeDataChanges(dataPath, <strong class="jxr_keyword">this</strong>);
-<a class="jxr_linenumber" name="403" href="#403">403</a> 
-<a class="jxr_linenumber" name="404" href="#404">404</a>           <em class="jxr_comment">// only needed for bucketized parent, but OK if we don't have child-change watch on the path</em>
-<a class="jxr_linenumber" name="405" href="#405">405</a>           logger.info(_manager.getInstanceName() + <span class="jxr_string">" unsubscribe child-change. path: "</span>
-<a class="jxr_linenumber" name="406" href="#406">406</a>         		  + dataPath + <span class="jxr_string">", listener: "</span> + _listener);
-<a class="jxr_linenumber" name="407" href="#407">407</a>           _zkClient.unsubscribeChildChanges(dataPath, <strong class="jxr_keyword">this</strong>);
-<a class="jxr_linenumber" name="408" href="#408">408</a> 
-<a class="jxr_linenumber" name="409" href="#409">409</a>           <em class="jxr_comment">// No need to invoke() since this event will handled by child-change on parent-node</em>
-<a class="jxr_linenumber" name="410" href="#410">410</a> <em class="jxr_comment">//        NotificationContext changeContext = new NotificationContext(_manager);</em>
-<a class="jxr_linenumber" name="411" href="#411">411</a> <em class="jxr_comment">//        changeContext.setType(NotificationContext.Type.CALLBACK);</em>
-<a class="jxr_linenumber" name="412" href="#412">412</a> <em class="jxr_comment">// 		  invoke(changeContext);</em>
-<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>     <strong class="jxr_keyword">catch</strong> (Exception e)
-<a class="jxr_linenumber" name="416" href="#416">416</a>     {
-<a class="jxr_linenumber" name="417" href="#417">417</a>       ZKExceptionHandler.getInstance().handle(e);
-<a class="jxr_linenumber" name="418" href="#418">418</a>     }
-<a class="jxr_linenumber" name="419" href="#419">419</a>   }
-<a class="jxr_linenumber" name="420" href="#420">420</a> 
-<a class="jxr_linenumber" name="421" href="#421">421</a>   @Override
-<a class="jxr_linenumber" name="422" href="#422">422</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> handleChildChange(String parentPath, List&lt;String&gt; currentChilds)
-<a class="jxr_linenumber" name="423" href="#423">423</a>   {
-<a class="jxr_linenumber" name="424" href="#424">424</a>     <strong class="jxr_keyword">try</strong>
-<a class="jxr_linenumber" name="425" href="#425">425</a>     {
-<a class="jxr_linenumber" name="426" href="#426">426</a>       updateNotificationTime(System.nanoTime());
-<a class="jxr_linenumber" name="427" href="#427">427</a>       <strong class="jxr_keyword">if</strong> (parentPath != <strong class="jxr_keyword">null</strong> &amp;&amp; parentPath.startsWith(_path))
-<a class="jxr_linenumber" name="428" href="#428">428</a>       {
-<a class="jxr_linenumber" name="429" href="#429">429</a>         <a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a> changeContext = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a>(_manager);
-<a class="jxr_linenumber" name="430" href="#430">430</a>         changeContext.setType(NotificationContext.Type.CALLBACK);
-<a class="jxr_linenumber" name="431" href="#431">431</a>         invoke(changeContext);
-<a class="jxr_linenumber" name="432" href="#432">432</a>       }
+<a class="jxr_linenumber" name="199" href="#199">199</a>         messageListener.onMessage(_manager.getInstanceName(), messages, changeContext);
+<a class="jxr_linenumber" name="200" href="#200">200</a> 
+<a class="jxr_linenumber" name="201" href="#201">201</a>       }
+<a class="jxr_linenumber" name="202" href="#202">202</a>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (_changeType == EXTERNAL_VIEW)
+<a class="jxr_linenumber" name="203" href="#203">203</a>       {
+<a class="jxr_linenumber" name="204" href="#204">204</a>         <a href="../../../../../org/apache/helix/ExternalViewChangeListener.html">ExternalViewChangeListener</a> externalViewListener =
+<a class="jxr_linenumber" name="205" href="#205">205</a>             (<a href="../../../../../org/apache/helix/ExternalViewChangeListener.html">ExternalViewChangeListener</a>) _listener;
+<a class="jxr_linenumber" name="206" href="#206">206</a>         subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, <strong class="jxr_keyword">true</strong>);
+<a class="jxr_linenumber" name="207" href="#207">207</a>         List&lt;ExternalView&gt; externalViewList =
+<a class="jxr_linenumber" name="208" href="#208">208</a>             _accessor.getChildValues(_propertyKey);
+<a class="jxr_linenumber" name="209" href="#209">209</a> 
+<a class="jxr_linenumber" name="210" href="#210">210</a>         externalViewListener.onExternalViewChange(externalViewList, changeContext);
+<a class="jxr_linenumber" name="211" href="#211">211</a>       }
+<a class="jxr_linenumber" name="212" href="#212">212</a>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (_changeType == ChangeType.CONTROLLER)
+<a class="jxr_linenumber" name="213" href="#213">213</a>       {
+<a class="jxr_linenumber" name="214" href="#214">214</a>         <a href="../../../../../org/apache/helix/ControllerChangeListener.html">ControllerChangeListener</a> controllerChangelistener =
+<a class="jxr_linenumber" name="215" href="#215">215</a>             (<a href="../../../../../org/apache/helix/ControllerChangeListener.html">ControllerChangeListener</a>) _listener;
+<a class="jxr_linenumber" name="216" href="#216">216</a>         subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, false);
+<a class="jxr_linenumber" name="217" href="#217">217</a>         controllerChangelistener.onControllerChange(changeContext);
+<a class="jxr_linenumber" name="218" href="#218">218</a>       }
+<a class="jxr_linenumber" name="219" href="#219">219</a>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (_changeType == ChangeType.HEALTH)
+<a class="jxr_linenumber" name="220" href="#220">220</a>       {
+<a class="jxr_linenumber" name="221" href="#221">221</a>         <a href="../../../../../org/apache/helix/HealthStateChangeListener.html">HealthStateChangeListener</a> healthStateChangeListener =
+<a class="jxr_linenumber" name="222" href="#222">222</a>             (<a href="../../../../../org/apache/helix/HealthStateChangeListener.html">HealthStateChangeListener</a>) _listener;
+<a class="jxr_linenumber" name="223" href="#223">223</a>         subscribeForChanges(changeContext, _path, <strong class="jxr_keyword">true</strong>, <strong class="jxr_keyword">true</strong>); <em class="jxr_comment">// TODO: figure out</em>
+<a class="jxr_linenumber" name="224" href="#224">224</a>         <em class="jxr_comment">// settings here</em>
+<a class="jxr_linenumber" name="225" href="#225">225</a>         String instanceName = PropertyPathConfig.getInstanceNameFromPath(_path);
+<a class="jxr_linenumber" name="226" href="#226">226</a> 
+<a class="jxr_linenumber" name="227" href="#227">227</a>         List&lt;HealthStat&gt; healthReportList =
+<a class="jxr_linenumber" name="228" href="#228">228</a>             _accessor.getChildValues(_propertyKey);
+<a class="jxr_linenumber" name="229" href="#229">229</a> 
+<a class="jxr_linenumber" name="230" href="#230">230</a>         healthStateChangeListener.onHealthChange(instanceName,
+<a class="jxr_linenumber" name="231" href="#231">231</a>                                                  healthReportList,
+<a class="jxr_linenumber" name="232" href="#232">232</a>                                                  changeContext);
+<a class="jxr_linenumber" name="233" href="#233">233</a>       }
+<a class="jxr_linenumber" name="234" href="#234">234</a>       <strong class="jxr_keyword">long</strong> end = System.currentTimeMillis();
+<a class="jxr_linenumber" name="235" href="#235">235</a>       <strong class="jxr_keyword">if</strong> (logger.isInfoEnabled())
+<a class="jxr_linenumber" name="236" href="#236">236</a>       {
+<a class="jxr_linenumber" name="237" href="#237">237</a>         logger.info(Thread.currentThread().getId() + <span class="jxr_string">" END:INVOKE "</span> + _path
+<a class="jxr_linenumber" name="238" href="#238">238</a>             + <span class="jxr_string">" listener:"</span> + _listener.getClass().getCanonicalName() + <span class="jxr_string">" Took: "</span>
+<a class="jxr_linenumber" name="239" href="#239">239</a>             + (end - start) +<span class="jxr_string">"ms"</span>);
+<a class="jxr_linenumber" name="240" href="#240">240</a>       }
+<a class="jxr_linenumber" name="241" href="#241">241</a>     }
+<a class="jxr_linenumber" name="242" href="#242">242</a>   }
+<a class="jxr_linenumber" name="243" href="#243">243</a> 
+<a class="jxr_linenumber" name="244" href="#244">244</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> subscribeChildChange(String path, <a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a> context)
+<a class="jxr_linenumber" name="245" href="#245">245</a>   {
+<a class="jxr_linenumber" name="246" href="#246">246</a> 	  NotificationContext.Type type = context.getType();
+<a class="jxr_linenumber" name="247" href="#247">247</a>       <strong class="jxr_keyword">if</strong> (type == NotificationContext.Type.INIT || type == NotificationContext.Type.CALLBACK)
+<a class="jxr_linenumber" name="248" href="#248">248</a>       {
+<a class="jxr_linenumber" name="249" href="#249">249</a>         logger.info(_manager.getInstanceName() + <span class="jxr_string">" subscribes child-change. path: "</span> 
+<a class="jxr_linenumber" name="250" href="#250">250</a>         		+ path + <span class="jxr_string">", listener: "</span> + _listener);
+<a class="jxr_linenumber" name="251" href="#251">251</a>         _zkClient.subscribeChildChanges(path, <strong class="jxr_keyword">this</strong>);
+<a class="jxr_linenumber" name="252" href="#252">252</a>       }
+<a class="jxr_linenumber" name="253" href="#253">253</a>       <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (type == NotificationContext.Type.FINALIZE)
+<a class="jxr_linenumber" name="254" href="#254">254</a>       {
+<a class="jxr_linenumber" name="255" href="#255">255</a>         logger.info(_manager.getInstanceName() + <span class="jxr_string">" unsubscribe child-change. path: "</span> 
+<a class="jxr_linenumber" name="256" href="#256">256</a>         		+ path + <span class="jxr_string">", listener: "</span> + _listener);
+<a class="jxr_linenumber" name="257" href="#257">257</a>         _zkClient.unsubscribeChildChanges(path, <strong class="jxr_keyword">this</strong>);
+<a class="jxr_linenumber" name="258" href="#258">258</a>       }
+<a class="jxr_linenumber" name="259" href="#259">259</a>   }
+<a class="jxr_linenumber" name="260" href="#260">260</a>   
+<a class="jxr_linenumber" name="261" href="#261">261</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> subscribeDataChange(String path, <a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a> context)
+<a class="jxr_linenumber" name="262" href="#262">262</a>   {
+<a class="jxr_linenumber" name="263" href="#263">263</a>     	NotificationContext.Type type = context.getType();
+<a class="jxr_linenumber" name="264" href="#264">264</a>         <strong class="jxr_keyword">if</strong> (type == NotificationContext.Type.INIT
+<a class="jxr_linenumber" name="265" href="#265">265</a>             || type == NotificationContext.Type.CALLBACK)
+<a class="jxr_linenumber" name="266" href="#266">266</a>         {
+<a class="jxr_linenumber" name="267" href="#267">267</a>           <strong class="jxr_keyword">if</strong> (logger.isDebugEnabled())
+<a class="jxr_linenumber" name="268" href="#268">268</a>           {
+<a class="jxr_linenumber" name="269" href="#269">269</a>             logger.debug(_manager.getInstanceName() + <span class="jxr_string">" subscribe data-change. path: "</span> 
+<a class="jxr_linenumber" name="270" href="#270">270</a>             		+ path + <span class="jxr_string">", listener: "</span> + _listener);
+<a class="jxr_linenumber" name="271" href="#271">271</a>           }
+<a class="jxr_linenumber" name="272" href="#272">272</a>           _zkClient.subscribeDataChanges(path, <strong class="jxr_keyword">this</strong>);
+<a class="jxr_linenumber" name="273" href="#273">273</a> 
+<a class="jxr_linenumber" name="274" href="#274">274</a>         }
+<a class="jxr_linenumber" name="275" href="#275">275</a>         <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (type == NotificationContext.Type.FINALIZE)
+<a class="jxr_linenumber" name="276" href="#276">276</a>         {
+<a class="jxr_linenumber" name="277" href="#277">277</a>           logger.info(_manager.getInstanceName() + <span class="jxr_string">" unsubscribe data-change. path: "</span> 
+<a class="jxr_linenumber" name="278" href="#278">278</a>         		  + path + <span class="jxr_string">", listener: "</span> + _listener);
+<a class="jxr_linenumber" name="279" href="#279">279</a>           _zkClient.unsubscribeDataChanges(path, <strong class="jxr_keyword">this</strong>);
+<a class="jxr_linenumber" name="280" href="#280">280</a>         }
+<a class="jxr_linenumber" name="281" href="#281">281</a>   }
+<a class="jxr_linenumber" name="282" href="#282">282</a>   
+<a class="jxr_linenumber" name="283" href="#283">283</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> subscribeForChanges(<a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a> context,
+<a class="jxr_linenumber" name="284" href="#284">284</a>                                    String path,
+<a class="jxr_linenumber" name="285" href="#285">285</a>                                    <strong class="jxr_keyword">boolean</strong> watchParent,
+<a class="jxr_linenumber" name="286" href="#286">286</a>                                    <strong class="jxr_keyword">boolean</strong> watchChild)
+<a class="jxr_linenumber" name="287" href="#287">287</a>   {
+<a class="jxr_linenumber" name="288" href="#288">288</a>     <strong class="jxr_keyword">if</strong> (watchParent)
+<a class="jxr_linenumber" name="289" href="#289">289</a>     {
+<a class="jxr_linenumber" name="290" href="#290">290</a>     	subscribeChildChange(path, context);
+<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">if</strong> (watchChild)
+<a class="jxr_linenumber" name="294" href="#294">294</a>     {
+<a class="jxr_linenumber" name="295" href="#295">295</a>       <strong class="jxr_keyword">try</strong>
+<a class="jxr_linenumber" name="296" href="#296">296</a>       {
+<a class="jxr_linenumber" name="297" href="#297">297</a>     	<strong class="jxr_keyword">switch</strong>(_changeType)
+<a class="jxr_linenumber" name="298" href="#298">298</a>     	{
+<a class="jxr_linenumber" name="299" href="#299">299</a>         <strong class="jxr_keyword">case</strong> CURRENT_STATE:
+<a class="jxr_linenumber" name="300" href="#300">300</a>         <strong class="jxr_keyword">case</strong> IDEAL_STATE:
+<a class="jxr_linenumber" name="301" href="#301">301</a>         <strong class="jxr_keyword">case</strong> EXTERNAL_VIEW:
+<a class="jxr_linenumber" name="302" href="#302">302</a>         {
+<a class="jxr_linenumber" name="303" href="#303">303</a>             <em class="jxr_comment">// check if bucketized</em>
+<a class="jxr_linenumber" name="304" href="#304">304</a>         	BaseDataAccessor&lt;ZNRecord&gt; baseAccessor = <strong class="jxr_keyword">new</strong> ZkBaseDataAccessor&lt;ZNRecord&gt;(_zkClient);
+<a class="jxr_linenumber" name="305" href="#305">305</a>         	List&lt;ZNRecord&gt; records = baseAccessor.getChildren(path, <strong class="jxr_keyword">null</strong>, 0);
+<a class="jxr_linenumber" name="306" href="#306">306</a>         	<strong class="jxr_keyword">for</strong> (ZNRecord record : records)
+<a class="jxr_linenumber" name="307" href="#307">307</a>         	{
+<a class="jxr_linenumber" name="308" href="#308">308</a>                 <a href="../../../../../org/apache/helix/HelixProperty.html">HelixProperty</a> property = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/HelixProperty.html">HelixProperty</a>(record);
+<a class="jxr_linenumber" name="309" href="#309">309</a>             	String childPath = path + <span class="jxr_string">"/"</span> + record.getId();
+<a class="jxr_linenumber" name="310" href="#310">310</a> 
+<a class="jxr_linenumber" name="311" href="#311">311</a>                 <strong class="jxr_keyword">int</strong> bucketSize = property.getBucketSize();
+<a class="jxr_linenumber" name="312" href="#312">312</a>                 <strong class="jxr_keyword">if</strong> (bucketSize &gt; 0)
+<a class="jxr_linenumber" name="313" href="#313">313</a>                 {
+<a class="jxr_linenumber" name="314" href="#314">314</a>                   <em class="jxr_comment">// subscribe both data-change and child-change on bucketized parent node</em>
+<a class="jxr_linenumber" name="315" href="#315">315</a>                   <em class="jxr_comment">// data-change gives a delete-callback which is used to remove watch</em>
+<a class="jxr_linenumber" name="316" href="#316">316</a>                   subscribeChildChange(childPath, context);
+<a class="jxr_linenumber" name="317" href="#317">317</a>                   subscribeDataChange(childPath, context);
+<a class="jxr_linenumber" name="318" href="#318">318</a>                   
+<a class="jxr_linenumber" name="319" href="#319">319</a>                   <em class="jxr_comment">// subscribe data-change on bucketized child</em>
+<a class="jxr_linenumber" name="320" href="#320">320</a>                   List&lt;String&gt; bucketizedChildNames = _zkClient.getChildren(childPath);
+<a class="jxr_linenumber" name="321" href="#321">321</a>                   <strong class="jxr_keyword">if</strong> (bucketizedChildNames != <strong class="jxr_keyword">null</strong>) 
+<a class="jxr_linenumber" name="322" href="#322">322</a>                   {
+<a class="jxr_linenumber" name="323" href="#323">323</a>                     <strong class="jxr_keyword">for</strong> (String bucketizedChildName : bucketizedChildNames)
+<a class="jxr_linenumber" name="324" href="#324">324</a>                     {
+<a class="jxr_linenumber" name="325" href="#325">325</a>                        String bucketizedChildPath = childPath + <span class="jxr_string">"/"</span> + bucketizedChildName;
+<a class="jxr_linenumber" name="326" href="#326">326</a>                        subscribeDataChange(bucketizedChildPath, context);
+<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">else</strong>
+<a class="jxr_linenumber" name="330" href="#330">330</a>                 {
+<a class="jxr_linenumber" name="331" href="#331">331</a>                     subscribeDataChange(childPath, context);
+<a class="jxr_linenumber" name="332" href="#332">332</a>                 }
+<a class="jxr_linenumber" name="333" href="#333">333</a>         	}
+<a class="jxr_linenumber" name="334" href="#334">334</a>         	<strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="335" href="#335">335</a>         }
+<a class="jxr_linenumber" name="336" href="#336">336</a>         <strong class="jxr_keyword">default</strong>:
+<a class="jxr_linenumber" name="337" href="#337">337</a>         {
+<a class="jxr_linenumber" name="338" href="#338">338</a>             List&lt;String&gt; childNames = _zkClient.getChildren(path);
+<a class="jxr_linenumber" name="339" href="#339">339</a>             <strong class="jxr_keyword">if</strong> (childNames != <strong class="jxr_keyword">null</strong>) 
+<a class="jxr_linenumber" name="340" href="#340">340</a>             {
+<a class="jxr_linenumber" name="341" href="#341">341</a>               <strong class="jxr_keyword">for</strong> (String childName : childNames)
+<a class="jxr_linenumber" name="342" href="#342">342</a>               {
+<a class="jxr_linenumber" name="343" href="#343">343</a>                  String childPath = path + <span class="jxr_string">"/"</span> + childName;
+<a class="jxr_linenumber" name="344" href="#344">344</a>                  subscribeDataChange(childPath, context);
+<a class="jxr_linenumber" name="345" href="#345">345</a>               }  
+<a class="jxr_linenumber" name="346" href="#346">346</a>             }
+<a class="jxr_linenumber" name="347" href="#347">347</a>         	<strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="348" href="#348">348</a>         }
+<a class="jxr_linenumber" name="349" href="#349">349</a>     	}
+<a class="jxr_linenumber" name="350" href="#350">350</a>       }
+<a class="jxr_linenumber" name="351" href="#351">351</a>       <strong class="jxr_keyword">catch</strong> (ZkNoNodeException e)
+<a class="jxr_linenumber" name="352" href="#352">352</a>       {
+<a class="jxr_linenumber" name="353" href="#353">353</a>         logger.warn(<span class="jxr_string">"fail to subscribe child/data change@. path: "</span> + path 
+<a class="jxr_linenumber" name="354" href="#354">354</a>         		+ <span class="jxr_string">", listener: "</span> + _listener, e);
+<a class="jxr_linenumber" name="355" href="#355">355</a>       }
+<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> 
+<a class="jxr_linenumber" name="360" href="#360">360</a>   <strong class="jxr_keyword">public</strong> EventType[] getEventTypes()
+<a class="jxr_linenumber" name="361" href="#361">361</a>   {
+<a class="jxr_linenumber" name="362" href="#362">362</a>     <strong class="jxr_keyword">return</strong> _eventTypes;
+<a class="jxr_linenumber" name="363" href="#363">363</a>   }
+<a class="jxr_linenumber" name="364" href="#364">364</a> 
+<a class="jxr_linenumber" name="365" href="#365">365</a>   <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="366" href="#366">366</a> <em class="jxr_javadoccomment">   * Invoke the listener so that it sets up the initial values from the zookeeper if any</em>
+<a class="jxr_linenumber" name="367" href="#367">367</a> <em class="jxr_javadoccomment">   * exists</em>
+<a class="jxr_linenumber" name="368" href="#368">368</a> <em class="jxr_javadoccomment">   * </em>
+<a class="jxr_linenumber" name="369" href="#369">369</a> <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="370" href="#370">370</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> init()
+<a class="jxr_linenumber" name="371" href="#371">371</a>   {
+<a class="jxr_linenumber" name="372" href="#372">372</a>     updateNotificationTime(System.nanoTime());
+<a class="jxr_linenumber" name="373" href="#373">373</a>     <strong class="jxr_keyword">try</strong>
+<a class="jxr_linenumber" name="374" href="#374">374</a>     {
+<a class="jxr_linenumber" name="375" href="#375">375</a>       <a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a> changeContext = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a>(_manager);
+<a class="jxr_linenumber" name="376" href="#376">376</a>       changeContext.setType(NotificationContext.Type.INIT);
+<a class="jxr_linenumber" name="377" href="#377">377</a>       invoke(changeContext);
+<a class="jxr_linenumber" name="378" href="#378">378</a>     }
+<a class="jxr_linenumber" name="379" href="#379">379</a>     <strong class="jxr_keyword">catch</strong> (Exception e)
+<a class="jxr_linenumber" name="380" href="#380">380</a>     {
+<a class="jxr_linenumber" name="381" href="#381">381</a>       ZKExceptionHandler.getInstance().handle(e);
+<a class="jxr_linenumber" name="382" href="#382">382</a>     }
+<a class="jxr_linenumber" name="383" href="#383">383</a>   }
+<a class="jxr_linenumber" name="384" href="#384">384</a> 
+<a class="jxr_linenumber" name="385" href="#385">385</a>   @Override
+<a class="jxr_linenumber" name="386" href="#386">386</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> handleDataChange(String dataPath, Object data)
+<a class="jxr_linenumber" name="387" href="#387">387</a>   {
+<a class="jxr_linenumber" name="388" href="#388">388</a>     <strong class="jxr_keyword">try</strong>
+<a class="jxr_linenumber" name="389" href="#389">389</a>     {
+<a class="jxr_linenumber" name="390" href="#390">390</a>       updateNotificationTime(System.nanoTime());
+<a class="jxr_linenumber" name="391" href="#391">391</a>       <strong class="jxr_keyword">if</strong> (dataPath != <strong class="jxr_keyword">null</strong> &amp;&amp; dataPath.startsWith(_path))
+<a class="jxr_linenumber" name="392" href="#392">392</a>       {
+<a class="jxr_linenumber" name="393" href="#393">393</a>         <a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a> changeContext = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/NotificationContext.html">NotificationContext</a>(_manager);
+<a class="jxr_linenumber" name="394" href="#394">394</a>         changeContext.setType(NotificationContext.Type.CALLBACK);
+<a class="jxr_linenumber" name="395" href="#395">395</a>         invoke(changeContext);
+<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>     <strong class="jxr_keyword">catch</strong> (Exception e)
+<a class="jxr_linenumber" name="399" href="#399">399</a>     {
+<a class="jxr_linenumber" name="400" href="#400">400</a>       logger.error(<span class="jxr_string">"exception in handling data-change. path: "</span> + dataPath 
+<a class="jxr_linenumber" name="401" href="#401">401</a>     		  + <span class="jxr_string">", listener: "</span> + _listener);
+<a class="jxr_linenumber" name="402" href="#402">402</a>       ZKExceptionHandler.getInstance().handle(e);
+<a class="jxr_linenumber" name="403" href="#403">403</a>     }
+<a class="jxr_linenumber" name="404" href="#404">404</a>   }
+<a class="jxr_linenumber" name="405" href="#405">405</a> 
+<a class="jxr_linenumber" name="406" href="#406">406</a>   @Override
+<a class="jxr_linenumber" name="407" href="#407">407</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> handleDataDeleted(String dataPath)
+<a class="jxr_linenumber" name="408" href="#408">408</a>   {
+<a class="jxr_linenumber" name="409" href="#409">409</a>     <strong class="jxr_keyword">try</strong>
+<a class="jxr_linenumber" name="410" href="#410">410</a>     {
+<a class="jxr_linenumber" name="411" href="#411">411</a>       updateNotificationTime(System.nanoTime());
+<a class="jxr_linenumber" name="412" href="#412">412</a>       <strong class="jxr_keyword">if</strong> (dataPath != <strong class="jxr_keyword">null</strong> &amp;&amp; dataPath.startsWith(_path))
+<a class="jxr_linenumber" name="413" href="#413">413</a>       {
+<a class="jxr_linenumber" name="414" href="#414">414</a>           logger.info(_manager.getInstanceName() + <span class="jxr_string">" unsubscribe data-change. path: "</span> 
+<a class="jxr_linenumber" name="415" href="#415">415</a>         		  + dataPath + <span class="jxr_string">", listener: "</span> + _listener);

[... 120 lines stripped ...]


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