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From ol...@apache.org
Subject svn commit: r1407678 [33/47] - in /incubator/helix/site-content: ./ apidocs/assets/ apidocs/reference/ apidocs/reference/org/apache/helix/ apidocs/reference/org/apache/helix/alerts/ apidocs/reference/org/apache/helix/controller/ apidocs/reference/org/a...
Date Fri, 09 Nov 2012 22:55:15 GMT
Modified: incubator/helix/site-content/xref/org/apache/helix/controller/HierarchicalDataHolder.html
URL: http://svn.apache.org/viewvc/incubator/helix/site-content/xref/org/apache/helix/controller/HierarchicalDataHolder.html?rev=1407678&r1=1407677&r2=1407678&view=diff
==============================================================================
--- incubator/helix/site-content/xref/org/apache/helix/controller/HierarchicalDataHolder.html
(original)
+++ incubator/helix/site-content/xref/org/apache/helix/controller/HierarchicalDataHolder.html
Fri Nov  9 22:54:26 2012
@@ -44,142 +44,140 @@
 <a class="jxr_linenumber" name="34" href="#34">34</a>  <em class="jxr_javadoccomment">/**</em>
 <a class="jxr_linenumber" name="35" href="#35">35</a>  <em class="jxr_javadoccomment">
* Generic class that will read the data given the root path.</em>
 <a class="jxr_linenumber" name="36" href="#36">36</a>  <em class="jxr_javadoccomment">
* </em>
-<a class="jxr_linenumber" name="37" href="#37">37</a>  <em class="jxr_javadoccomment">
* @author kgopalak</em>
-<a class="jxr_linenumber" name="38" href="#38">38</a>  <em class="jxr_javadoccomment">
* </em>
-<a class="jxr_linenumber" name="39" href="#39">39</a>  <em class="jxr_javadoccomment">
*/</em>
-<a class="jxr_linenumber" name="40" href="#40">40</a>  <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">class</strong> HierarchicalDataHolder&lt;T&gt;
-<a class="jxr_linenumber" name="41" href="#41">41</a>  {
-<a class="jxr_linenumber" name="42" href="#42">42</a>    <strong class="jxr_keyword">private</strong>
<strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong>
Logger logger = Logger
-<a class="jxr_linenumber" name="43" href="#43">43</a>        .getLogger(HierarchicalDataHolder.<strong
class="jxr_keyword">class</strong>.getName());
-<a class="jxr_linenumber" name="44" href="#44">44</a>    AtomicReference&lt;Node&lt;T&gt;&gt;
root;
-<a class="jxr_linenumber" name="45" href="#45">45</a>  
-<a class="jxr_linenumber" name="46" href="#46">46</a>    <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="47" href="#47">47</a>  <em class="jxr_javadoccomment">
  * currentVersion, gets updated when data is read from original source</em>
-<a class="jxr_linenumber" name="48" href="#48">48</a>  <em class="jxr_javadoccomment">
  */</em>
-<a class="jxr_linenumber" name="49" href="#49">49</a>    AtomicLong currentVersion;
-<a class="jxr_linenumber" name="50" href="#50">50</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="51" href="#51">51</a>    <strong class="jxr_keyword">private</strong>
<strong class="jxr_keyword">final</strong> String _rootPath;
-<a class="jxr_linenumber" name="52" href="#52">52</a>    <strong class="jxr_keyword">private</strong>
<strong class="jxr_keyword">final</strong> FileFilter _filter;
-<a class="jxr_linenumber" name="53" href="#53">53</a>  
-<a class="jxr_linenumber" name="54" href="#54">54</a>    <strong class="jxr_keyword">public</strong>
<a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">HierarchicalDataHolder</a>(<a
href="../../../../org/apache/helix/manager/zk/ZkClient.html">ZkClient</a> client,
String rootPath,
-<a class="jxr_linenumber" name="55" href="#55">55</a>        FileFilter filter)
-<a class="jxr_linenumber" name="56" href="#56">56</a>    {
-<a class="jxr_linenumber" name="57" href="#57">57</a>      <strong class="jxr_keyword">this</strong>._zkClient
= client;
-<a class="jxr_linenumber" name="58" href="#58">58</a>      <strong class="jxr_keyword">this</strong>._rootPath
= rootPath;
-<a class="jxr_linenumber" name="59" href="#59">59</a>      <strong class="jxr_keyword">this</strong>._filter
= filter;
-<a class="jxr_linenumber" name="60" href="#60">60</a>      <em class="jxr_comment">//
Node&lt;T&gt; initialValue = new Node&lt;T&gt;();</em>
-<a class="jxr_linenumber" name="61" href="#61">61</a>      root = <strong
class="jxr_keyword">new</strong> AtomicReference&lt;HierarchicalDataHolder.Node&lt;T&gt;&gt;();
-<a class="jxr_linenumber" name="62" href="#62">62</a>      currentVersion = <strong
class="jxr_keyword">new</strong> AtomicLong(1);
-<a class="jxr_linenumber" name="63" href="#63">63</a>      refreshData();
-<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>    <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">long</strong> getVersion()
-<a class="jxr_linenumber" name="67" href="#67">67</a>    {
-<a class="jxr_linenumber" name="68" href="#68">68</a>      <strong class="jxr_keyword">return</strong>
currentVersion.get();
-<a class="jxr_linenumber" name="69" href="#69">69</a>    }
-<a class="jxr_linenumber" name="70" href="#70">70</a>  
-<a class="jxr_linenumber" name="71" href="#71">71</a>    <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">boolean</strong> refreshData()
-<a class="jxr_linenumber" name="72" href="#72">72</a>    {
-<a class="jxr_linenumber" name="73" href="#73">73</a>      Node&lt;T&gt;
newRoot = <strong class="jxr_keyword">new</strong> Node&lt;T&gt;();
-<a class="jxr_linenumber" name="74" href="#74">74</a>      <strong class="jxr_keyword">boolean</strong>
dataChanged = refreshRecursively(root.get(), newRoot, _rootPath);
-<a class="jxr_linenumber" name="75" href="#75">75</a>      <strong class="jxr_keyword">if</strong>
(dataChanged)
-<a class="jxr_linenumber" name="76" href="#76">76</a>      {
-<a class="jxr_linenumber" name="77" href="#77">77</a>        currentVersion.getAndIncrement();
-<a class="jxr_linenumber" name="78" href="#78">78</a>        root.set(newRoot);
-<a class="jxr_linenumber" name="79" href="#79">79</a>        <strong class="jxr_keyword">return</strong>
<strong class="jxr_keyword">true</strong>;
-<a class="jxr_linenumber" name="80" href="#80">80</a>      } <strong class="jxr_keyword">else</strong>
-<a class="jxr_linenumber" name="81" href="#81">81</a>      {
-<a class="jxr_linenumber" name="82" href="#82">82</a>        <strong class="jxr_keyword">return</strong>
false;
-<a class="jxr_linenumber" name="83" href="#83">83</a>      }
-<a class="jxr_linenumber" name="84" href="#84">84</a>    }
-<a class="jxr_linenumber" name="85" href="#85">85</a>  
-<a class="jxr_linenumber" name="86" href="#86">86</a>    <em class="jxr_comment">//
private void refreshRecursively(Node&lt;T&gt; oldRoot, Stat oldStat, Node&lt;T&gt;</em>
-<a class="jxr_linenumber" name="87" href="#87">87</a>    <em class="jxr_comment">//
newRoot,Stat newStat, String path)</em>
-<a class="jxr_linenumber" name="88" href="#88">88</a>    <strong class="jxr_keyword">private</strong>
<strong class="jxr_keyword">boolean</strong> refreshRecursively(Node&lt;T&gt;
oldRoot, Node&lt;T&gt; newRoot,
-<a class="jxr_linenumber" name="89" href="#89">89</a>        String path)
-<a class="jxr_linenumber" name="90" href="#90">90</a>    {
-<a class="jxr_linenumber" name="91" href="#91">91</a>      <strong class="jxr_keyword">boolean</strong>
dataChanged = false;
-<a class="jxr_linenumber" name="92" href="#92">92</a>      Stat newStat = _zkClient.getStat(path);
-<a class="jxr_linenumber" name="93" href="#93">93</a>      Stat oldStat = (oldRoot
!= <strong class="jxr_keyword">null</strong>) ? oldRoot.stat : <strong class="jxr_keyword">null</strong>;
-<a class="jxr_linenumber" name="94" href="#94">94</a>      newRoot.name = path;
-<a class="jxr_linenumber" name="95" href="#95">95</a>      <strong class="jxr_keyword">if</strong>
(newStat != <strong class="jxr_keyword">null</strong>)
-<a class="jxr_linenumber" name="96" href="#96">96</a>      {
-<a class="jxr_linenumber" name="97" href="#97">97</a>        <strong class="jxr_keyword">if</strong>
(oldStat == <strong class="jxr_keyword">null</strong>)
-<a class="jxr_linenumber" name="98" href="#98">98</a>        {
-<a class="jxr_linenumber" name="99" href="#99">99</a>          newRoot.stat =
newStat;
-<a class="jxr_linenumber" name="100" href="#100">100</a>         newRoot.data
= _zkClient.&lt;T&gt; readData(path, <strong class="jxr_keyword">true</strong>);
-<a class="jxr_linenumber" name="101" href="#101">101</a>         dataChanged
= <strong class="jxr_keyword">true</strong>;
-<a class="jxr_linenumber" name="102" href="#102">102</a>       } <strong class="jxr_keyword">else</strong>
<strong class="jxr_keyword">if</strong> (newStat.equals(oldStat))
-<a class="jxr_linenumber" name="103" href="#103">103</a>       {
-<a class="jxr_linenumber" name="104" href="#104">104</a>         newRoot.stat
= oldStat;
-<a class="jxr_linenumber" name="105" href="#105">105</a>         newRoot.data
= oldRoot.data;
-<a class="jxr_linenumber" name="106" href="#106">106</a>       } <strong class="jxr_keyword">else</strong>
-<a class="jxr_linenumber" name="107" href="#107">107</a>       {
-<a class="jxr_linenumber" name="108" href="#108">108</a>         dataChanged
= <strong class="jxr_keyword">true</strong>;
-<a class="jxr_linenumber" name="109" href="#109">109</a>         newRoot.stat
= newStat;
-<a class="jxr_linenumber" name="110" href="#110">110</a>         newRoot.data
= _zkClient.&lt;T&gt; readData(path, <strong class="jxr_keyword">true</strong>);
-<a class="jxr_linenumber" name="111" href="#111">111</a>       }
-<a class="jxr_linenumber" name="112" href="#112">112</a>       <strong class="jxr_keyword">if</strong>
(newStat.getNumChildren() &gt; 0)
-<a class="jxr_linenumber" name="113" href="#113">113</a>       {
-<a class="jxr_linenumber" name="114" href="#114">114</a>         List&lt;String&gt;
children = _zkClient.getChildren(path);
-<a class="jxr_linenumber" name="115" href="#115">115</a>         <strong class="jxr_keyword">for</strong>
(String child : children)
-<a class="jxr_linenumber" name="116" href="#116">116</a>         {
-<a class="jxr_linenumber" name="117" href="#117">117</a>           String newPath
= path + <span class="jxr_string">"/"</span> + child;
-<a class="jxr_linenumber" name="118" href="#118">118</a>           Node&lt;T&gt;
oldChild = (oldRoot != <strong class="jxr_keyword">null</strong> &amp;&amp;
oldRoot.children != <strong class="jxr_keyword">null</strong>) ? oldRoot.children
-<a class="jxr_linenumber" name="119" href="#119">119</a>               .get(child)
: <strong class="jxr_keyword">null</strong>;
-<a class="jxr_linenumber" name="120" href="#120">120</a>           <strong
class="jxr_keyword">if</strong> (newRoot.children == <strong class="jxr_keyword">null</strong>)
-<a class="jxr_linenumber" name="121" href="#121">121</a>           {
-<a class="jxr_linenumber" name="122" href="#122">122</a>             newRoot.children
= <strong class="jxr_keyword">new</strong> ConcurrentHashMap&lt;String, HierarchicalDataHolder.Node&lt;T&gt;&gt;();
-<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> (!newRoot.children.contains(child))
-<a class="jxr_linenumber" name="125" href="#125">125</a>           {
-<a class="jxr_linenumber" name="126" href="#126">126</a>             newRoot.children.put(child,
<strong class="jxr_keyword">new</strong> Node&lt;T&gt;());
-<a class="jxr_linenumber" name="127" href="#127">127</a>           }
-<a class="jxr_linenumber" name="128" href="#128">128</a>           Node&lt;T&gt;
newChild = newRoot.children.get(child);
-<a class="jxr_linenumber" name="129" href="#129">129</a>           <strong
class="jxr_keyword">boolean</strong> childChanged = refreshRecursively(oldChild,
newChild, newPath);
-<a class="jxr_linenumber" name="130" href="#130">130</a>           dataChanged
= dataChanged || childChanged;
-<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>     } <strong class="jxr_keyword">else</strong>
-<a class="jxr_linenumber" name="134" href="#134">134</a>     {
-<a class="jxr_linenumber" name="135" href="#135">135</a>       logger.info(path
+ <span class="jxr_string">" does not exist"</span>);
-<a class="jxr_linenumber" name="136" href="#136">136</a>     }
-<a class="jxr_linenumber" name="137" href="#137">137</a>     <strong class="jxr_keyword">return</strong>
dataChanged;
-<a class="jxr_linenumber" name="138" href="#138">138</a>   }
-<a class="jxr_linenumber" name="139" href="#139">139</a> 
-<a class="jxr_linenumber" name="140" href="#140">140</a>   <strong class="jxr_keyword">static</strong>
<strong class="jxr_keyword">class</strong> Node&lt;T&gt;
-<a class="jxr_linenumber" name="141" href="#141">141</a>   {
-<a class="jxr_linenumber" name="142" href="#142">142</a>     String name;
-<a class="jxr_linenumber" name="143" href="#143">143</a>     Stat stat;
-<a class="jxr_linenumber" name="144" href="#144">144</a>     T data;
-<a class="jxr_linenumber" name="145" href="#145">145</a>     ConcurrentHashMap&lt;String,
Node&lt;T&gt;&gt; children;
+<a class="jxr_linenumber" name="37" href="#37">37</a>  <em class="jxr_javadoccomment">
*/</em>
+<a class="jxr_linenumber" name="38" href="#38">38</a>  <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">class</strong> HierarchicalDataHolder&lt;T&gt;
+<a class="jxr_linenumber" name="39" href="#39">39</a>  {
+<a class="jxr_linenumber" name="40" href="#40">40</a>    <strong class="jxr_keyword">private</strong>
<strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong>
Logger logger = Logger
+<a class="jxr_linenumber" name="41" href="#41">41</a>        .getLogger(HierarchicalDataHolder.<strong
class="jxr_keyword">class</strong>.getName());
+<a class="jxr_linenumber" name="42" href="#42">42</a>    AtomicReference&lt;Node&lt;T&gt;&gt;
root;
+<a class="jxr_linenumber" name="43" href="#43">43</a>  
+<a class="jxr_linenumber" name="44" href="#44">44</a>    <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="45" href="#45">45</a>  <em class="jxr_javadoccomment">
  * currentVersion, gets updated when data is read from original source</em>
+<a class="jxr_linenumber" name="46" href="#46">46</a>  <em class="jxr_javadoccomment">
  */</em>
+<a class="jxr_linenumber" name="47" href="#47">47</a>    AtomicLong currentVersion;
+<a class="jxr_linenumber" name="48" href="#48">48</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="49" href="#49">49</a>    <strong class="jxr_keyword">private</strong>
<strong class="jxr_keyword">final</strong> String _rootPath;
+<a class="jxr_linenumber" name="50" href="#50">50</a>    <strong class="jxr_keyword">private</strong>
<strong class="jxr_keyword">final</strong> FileFilter _filter;
+<a class="jxr_linenumber" name="51" href="#51">51</a>  
+<a class="jxr_linenumber" name="52" href="#52">52</a>    <strong class="jxr_keyword">public</strong>
<a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">HierarchicalDataHolder</a>(<a
href="../../../../org/apache/helix/manager/zk/ZkClient.html">ZkClient</a> client,
String rootPath,
+<a class="jxr_linenumber" name="53" href="#53">53</a>        FileFilter filter)
+<a class="jxr_linenumber" name="54" href="#54">54</a>    {
+<a class="jxr_linenumber" name="55" href="#55">55</a>      <strong class="jxr_keyword">this</strong>._zkClient
= client;
+<a class="jxr_linenumber" name="56" href="#56">56</a>      <strong class="jxr_keyword">this</strong>._rootPath
= rootPath;
+<a class="jxr_linenumber" name="57" href="#57">57</a>      <strong class="jxr_keyword">this</strong>._filter
= filter;
+<a class="jxr_linenumber" name="58" href="#58">58</a>      <em class="jxr_comment">//
Node&lt;T&gt; initialValue = new Node&lt;T&gt;();</em>
+<a class="jxr_linenumber" name="59" href="#59">59</a>      root = <strong
class="jxr_keyword">new</strong> AtomicReference&lt;HierarchicalDataHolder.Node&lt;T&gt;&gt;();
+<a class="jxr_linenumber" name="60" href="#60">60</a>      currentVersion = <strong
class="jxr_keyword">new</strong> AtomicLong(1);
+<a class="jxr_linenumber" name="61" href="#61">61</a>      refreshData();
+<a class="jxr_linenumber" name="62" href="#62">62</a>    }
+<a class="jxr_linenumber" name="63" href="#63">63</a>  
+<a class="jxr_linenumber" name="64" href="#64">64</a>    <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">long</strong> getVersion()
+<a class="jxr_linenumber" name="65" href="#65">65</a>    {
+<a class="jxr_linenumber" name="66" href="#66">66</a>      <strong class="jxr_keyword">return</strong>
currentVersion.get();
+<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>    <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">boolean</strong> refreshData()
+<a class="jxr_linenumber" name="70" href="#70">70</a>    {
+<a class="jxr_linenumber" name="71" href="#71">71</a>      Node&lt;T&gt;
newRoot = <strong class="jxr_keyword">new</strong> Node&lt;T&gt;();
+<a class="jxr_linenumber" name="72" href="#72">72</a>      <strong class="jxr_keyword">boolean</strong>
dataChanged = refreshRecursively(root.get(), newRoot, _rootPath);
+<a class="jxr_linenumber" name="73" href="#73">73</a>      <strong class="jxr_keyword">if</strong>
(dataChanged)
+<a class="jxr_linenumber" name="74" href="#74">74</a>      {
+<a class="jxr_linenumber" name="75" href="#75">75</a>        currentVersion.getAndIncrement();
+<a class="jxr_linenumber" name="76" href="#76">76</a>        root.set(newRoot);
+<a class="jxr_linenumber" name="77" href="#77">77</a>        <strong class="jxr_keyword">return</strong>
<strong class="jxr_keyword">true</strong>;
+<a class="jxr_linenumber" name="78" href="#78">78</a>      } <strong class="jxr_keyword">else</strong>
+<a class="jxr_linenumber" name="79" href="#79">79</a>      {
+<a class="jxr_linenumber" name="80" href="#80">80</a>        <strong class="jxr_keyword">return</strong>
false;
+<a class="jxr_linenumber" name="81" href="#81">81</a>      }
+<a class="jxr_linenumber" name="82" href="#82">82</a>    }
+<a class="jxr_linenumber" name="83" href="#83">83</a>  
+<a class="jxr_linenumber" name="84" href="#84">84</a>    <em class="jxr_comment">//
private void refreshRecursively(Node&lt;T&gt; oldRoot, Stat oldStat, Node&lt;T&gt;</em>
+<a class="jxr_linenumber" name="85" href="#85">85</a>    <em class="jxr_comment">//
newRoot,Stat newStat, String path)</em>
+<a class="jxr_linenumber" name="86" href="#86">86</a>    <strong class="jxr_keyword">private</strong>
<strong class="jxr_keyword">boolean</strong> refreshRecursively(Node&lt;T&gt;
oldRoot, Node&lt;T&gt; newRoot,
+<a class="jxr_linenumber" name="87" href="#87">87</a>        String path)
+<a class="jxr_linenumber" name="88" href="#88">88</a>    {
+<a class="jxr_linenumber" name="89" href="#89">89</a>      <strong class="jxr_keyword">boolean</strong>
dataChanged = false;
+<a class="jxr_linenumber" name="90" href="#90">90</a>      Stat newStat = _zkClient.getStat(path);
+<a class="jxr_linenumber" name="91" href="#91">91</a>      Stat oldStat = (oldRoot
!= <strong class="jxr_keyword">null</strong>) ? oldRoot.stat : <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="92" href="#92">92</a>      newRoot.name = path;
+<a class="jxr_linenumber" name="93" href="#93">93</a>      <strong class="jxr_keyword">if</strong>
(newStat != <strong class="jxr_keyword">null</strong>)
+<a class="jxr_linenumber" name="94" href="#94">94</a>      {
+<a class="jxr_linenumber" name="95" href="#95">95</a>        <strong class="jxr_keyword">if</strong>
(oldStat == <strong class="jxr_keyword">null</strong>)
+<a class="jxr_linenumber" name="96" href="#96">96</a>        {
+<a class="jxr_linenumber" name="97" href="#97">97</a>          newRoot.stat =
newStat;
+<a class="jxr_linenumber" name="98" href="#98">98</a>          newRoot.data =
_zkClient.&lt;T&gt; readData(path, <strong class="jxr_keyword">true</strong>);
+<a class="jxr_linenumber" name="99" href="#99">99</a>          dataChanged =
<strong class="jxr_keyword">true</strong>;
+<a class="jxr_linenumber" name="100" href="#100">100</a>       } <strong class="jxr_keyword">else</strong>
<strong class="jxr_keyword">if</strong> (newStat.equals(oldStat))
+<a class="jxr_linenumber" name="101" href="#101">101</a>       {
+<a class="jxr_linenumber" name="102" href="#102">102</a>         newRoot.stat
= oldStat;
+<a class="jxr_linenumber" name="103" href="#103">103</a>         newRoot.data
= oldRoot.data;
+<a class="jxr_linenumber" name="104" href="#104">104</a>       } <strong class="jxr_keyword">else</strong>
+<a class="jxr_linenumber" name="105" href="#105">105</a>       {
+<a class="jxr_linenumber" name="106" href="#106">106</a>         dataChanged
= <strong class="jxr_keyword">true</strong>;
+<a class="jxr_linenumber" name="107" href="#107">107</a>         newRoot.stat
= newStat;
+<a class="jxr_linenumber" name="108" href="#108">108</a>         newRoot.data
= _zkClient.&lt;T&gt; readData(path, <strong class="jxr_keyword">true</strong>);
+<a class="jxr_linenumber" name="109" href="#109">109</a>       }
+<a class="jxr_linenumber" name="110" href="#110">110</a>       <strong class="jxr_keyword">if</strong>
(newStat.getNumChildren() &gt; 0)
+<a class="jxr_linenumber" name="111" href="#111">111</a>       {
+<a class="jxr_linenumber" name="112" href="#112">112</a>         List&lt;String&gt;
children = _zkClient.getChildren(path);
+<a class="jxr_linenumber" name="113" href="#113">113</a>         <strong class="jxr_keyword">for</strong>
(String child : children)
+<a class="jxr_linenumber" name="114" href="#114">114</a>         {
+<a class="jxr_linenumber" name="115" href="#115">115</a>           String newPath
= path + <span class="jxr_string">"/"</span> + child;
+<a class="jxr_linenumber" name="116" href="#116">116</a>           Node&lt;T&gt;
oldChild = (oldRoot != <strong class="jxr_keyword">null</strong> &amp;&amp;
oldRoot.children != <strong class="jxr_keyword">null</strong>) ? oldRoot.children
+<a class="jxr_linenumber" name="117" href="#117">117</a>               .get(child)
: <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="118" href="#118">118</a>           <strong
class="jxr_keyword">if</strong> (newRoot.children == <strong class="jxr_keyword">null</strong>)
+<a class="jxr_linenumber" name="119" href="#119">119</a>           {
+<a class="jxr_linenumber" name="120" href="#120">120</a>             newRoot.children
= <strong class="jxr_keyword">new</strong> ConcurrentHashMap&lt;String, HierarchicalDataHolder.Node&lt;T&gt;&gt;();
+<a class="jxr_linenumber" name="121" href="#121">121</a>           }
+<a class="jxr_linenumber" name="122" href="#122">122</a>           <strong
class="jxr_keyword">if</strong> (!newRoot.children.contains(child))
+<a class="jxr_linenumber" name="123" href="#123">123</a>           {
+<a class="jxr_linenumber" name="124" href="#124">124</a>             newRoot.children.put(child,
<strong class="jxr_keyword">new</strong> Node&lt;T&gt;());
+<a class="jxr_linenumber" name="125" href="#125">125</a>           }
+<a class="jxr_linenumber" name="126" href="#126">126</a>           Node&lt;T&gt;
newChild = newRoot.children.get(child);
+<a class="jxr_linenumber" name="127" href="#127">127</a>           <strong
class="jxr_keyword">boolean</strong> childChanged = refreshRecursively(oldChild,
newChild, newPath);
+<a class="jxr_linenumber" name="128" href="#128">128</a>           dataChanged
= dataChanged || childChanged;
+<a class="jxr_linenumber" name="129" href="#129">129</a>         }
+<a class="jxr_linenumber" name="130" href="#130">130</a>       }
+<a class="jxr_linenumber" name="131" href="#131">131</a>     } <strong class="jxr_keyword">else</strong>
+<a class="jxr_linenumber" name="132" href="#132">132</a>     {
+<a class="jxr_linenumber" name="133" href="#133">133</a>       logger.info(path
+ <span class="jxr_string">" does not exist"</span>);
+<a class="jxr_linenumber" name="134" href="#134">134</a>     }
+<a class="jxr_linenumber" name="135" href="#135">135</a>     <strong class="jxr_keyword">return</strong>
dataChanged;
+<a class="jxr_linenumber" name="136" href="#136">136</a>   }
+<a class="jxr_linenumber" name="137" href="#137">137</a> 
+<a class="jxr_linenumber" name="138" href="#138">138</a>   <strong class="jxr_keyword">static</strong>
<strong class="jxr_keyword">class</strong> Node&lt;T&gt;
+<a class="jxr_linenumber" name="139" href="#139">139</a>   {
+<a class="jxr_linenumber" name="140" href="#140">140</a>     String name;
+<a class="jxr_linenumber" name="141" href="#141">141</a>     Stat stat;
+<a class="jxr_linenumber" name="142" href="#142">142</a>     T data;
+<a class="jxr_linenumber" name="143" href="#143">143</a>     ConcurrentHashMap&lt;String,
Node&lt;T&gt;&gt; children;
+<a class="jxr_linenumber" name="144" href="#144">144</a> 
+<a class="jxr_linenumber" name="145" href="#145">145</a>   }
 <a class="jxr_linenumber" name="146" href="#146">146</a> 
-<a class="jxr_linenumber" name="147" href="#147">147</a>   }
-<a class="jxr_linenumber" name="148" href="#148">148</a> 
-<a class="jxr_linenumber" name="149" href="#149">149</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">void</strong> print()
-<a class="jxr_linenumber" name="150" href="#150">150</a>   {
-<a class="jxr_linenumber" name="151" href="#151">151</a>     logger.info(<span
class="jxr_string">"START "</span>+ _rootPath);
-<a class="jxr_linenumber" name="152" href="#152">152</a>     LinkedList&lt;Node&lt;T&gt;&gt;
stack = <strong class="jxr_keyword">new</strong> LinkedList&lt;HierarchicalDataHolder.Node&lt;T&gt;&gt;();
-<a class="jxr_linenumber" name="153" href="#153">153</a>     stack.push(root.get());
-<a class="jxr_linenumber" name="154" href="#154">154</a>     <strong class="jxr_keyword">while</strong>
(!stack.isEmpty())
-<a class="jxr_linenumber" name="155" href="#155">155</a>     {
-<a class="jxr_linenumber" name="156" href="#156">156</a>       Node&lt;T&gt;
pop = stack.pop();
-<a class="jxr_linenumber" name="157" href="#157">157</a>       <strong class="jxr_keyword">if</strong>
(pop != <strong class="jxr_keyword">null</strong>)
-<a class="jxr_linenumber" name="158" href="#158">158</a>       {
-<a class="jxr_linenumber" name="159" href="#159">159</a>         logger.info(<span
class="jxr_string">"name:"</span>+ pop.name);
-<a class="jxr_linenumber" name="160" href="#160">160</a>         logger.info(<span
class="jxr_string">"\tdata:"</span>+pop.data);
-<a class="jxr_linenumber" name="161" href="#161">161</a>         <strong class="jxr_keyword">if</strong>
(pop.children != <strong class="jxr_keyword">null</strong>)
-<a class="jxr_linenumber" name="162" href="#162">162</a>         {
-<a class="jxr_linenumber" name="163" href="#163">163</a>           <strong
class="jxr_keyword">for</strong> (Node&lt;T&gt; child : pop.children.values())
-<a class="jxr_linenumber" name="164" href="#164">164</a>           {
-<a class="jxr_linenumber" name="165" href="#165">165</a>             stack.push(child);
-<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>       }
-<a class="jxr_linenumber" name="169" href="#169">169</a>     }
-<a class="jxr_linenumber" name="170" href="#170">170</a>     logger.info(<span
class="jxr_string">"END "</span>+ _rootPath);
-<a class="jxr_linenumber" name="171" href="#171">171</a>   }
-<a class="jxr_linenumber" name="172" href="#172">172</a> }
+<a class="jxr_linenumber" name="147" href="#147">147</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">void</strong> print()
+<a class="jxr_linenumber" name="148" href="#148">148</a>   {
+<a class="jxr_linenumber" name="149" href="#149">149</a>     logger.info(<span
class="jxr_string">"START "</span>+ _rootPath);
+<a class="jxr_linenumber" name="150" href="#150">150</a>     LinkedList&lt;Node&lt;T&gt;&gt;
stack = <strong class="jxr_keyword">new</strong> LinkedList&lt;HierarchicalDataHolder.Node&lt;T&gt;&gt;();
+<a class="jxr_linenumber" name="151" href="#151">151</a>     stack.push(root.get());
+<a class="jxr_linenumber" name="152" href="#152">152</a>     <strong class="jxr_keyword">while</strong>
(!stack.isEmpty())
+<a class="jxr_linenumber" name="153" href="#153">153</a>     {
+<a class="jxr_linenumber" name="154" href="#154">154</a>       Node&lt;T&gt;
pop = stack.pop();
+<a class="jxr_linenumber" name="155" href="#155">155</a>       <strong class="jxr_keyword">if</strong>
(pop != <strong class="jxr_keyword">null</strong>)
+<a class="jxr_linenumber" name="156" href="#156">156</a>       {
+<a class="jxr_linenumber" name="157" href="#157">157</a>         logger.info(<span
class="jxr_string">"name:"</span>+ pop.name);
+<a class="jxr_linenumber" name="158" href="#158">158</a>         logger.info(<span
class="jxr_string">"\tdata:"</span>+pop.data);
+<a class="jxr_linenumber" name="159" href="#159">159</a>         <strong class="jxr_keyword">if</strong>
(pop.children != <strong class="jxr_keyword">null</strong>)
+<a class="jxr_linenumber" name="160" href="#160">160</a>         {
+<a class="jxr_linenumber" name="161" href="#161">161</a>           <strong
class="jxr_keyword">for</strong> (Node&lt;T&gt; child : pop.children.values())
+<a class="jxr_linenumber" name="162" href="#162">162</a>           {
+<a class="jxr_linenumber" name="163" href="#163">163</a>             stack.push(child);
+<a class="jxr_linenumber" name="164" href="#164">164</a>           }
+<a class="jxr_linenumber" name="165" href="#165">165</a>         }
+<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>     logger.info(<span
class="jxr_string">"END "</span>+ _rootPath);
+<a class="jxr_linenumber" name="169" href="#169">169</a>   }
+<a class="jxr_linenumber" name="170" href="#170">170</a> }
 </pre>
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