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From kisho...@apache.org
Subject svn commit: r1454247 [23/23] - in /incubator/helix/site-content: ./ apidocs/reference/ apidocs/reference/org/apache/helix/ apidocs/reference/org/apache/helix/messaging/handling/ apidocs/reference/org/apache/helix/tools/ apidocs/reference/org/apache/hel...
Date Fri, 08 Mar 2013 04:38:26 GMT
Modified: incubator/helix/site-content/xref/org/apache/helix/util/HelixUtil.html
URL: http://svn.apache.org/viewvc/incubator/helix/site-content/xref/org/apache/helix/util/HelixUtil.html?rev=1454247&r1=1454246&r2=1454247&view=diff
==============================================================================
--- incubator/helix/site-content/xref/org/apache/helix/util/HelixUtil.html (original)
+++ incubator/helix/site-content/xref/org/apache/helix/util/HelixUtil.html Fri Mar  8 04:38:16
2013
@@ -70,129 +70,145 @@
 <a class="jxr_linenumber" name="60" href="#60">60</a>      <strong class="jxr_keyword">return</strong>
getPropertyPath(clusterName, PropertyType.LIVEINSTANCES);
 <a class="jxr_linenumber" name="61" href="#61">61</a>    }
 <a class="jxr_linenumber" name="62" href="#62">62</a>  
-<a class="jxr_linenumber" name="63" href="#63">63</a>    <em class="jxr_comment">//
public static String getConfigPath(String clusterName)</em>
-<a class="jxr_linenumber" name="64" href="#64">64</a>    <em class="jxr_comment">//
{</em>
-<a class="jxr_linenumber" name="65" href="#65">65</a>    <em class="jxr_comment">//
return getPropertyPath(clusterName, PropertyType.PARTICIPANT_CONFIGS);</em>
-<a class="jxr_linenumber" name="66" href="#66">66</a>    <em class="jxr_comment">//
}</em>
+<a class="jxr_linenumber" name="63" href="#63">63</a>    <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getMessagePath(String clusterName,
String instanceName)
+<a class="jxr_linenumber" name="64" href="#64">64</a>    {
+<a class="jxr_linenumber" name="65" href="#65">65</a>      <strong class="jxr_keyword">return</strong>
getInstancePropertyPath(clusterName, instanceName, PropertyType.MESSAGES);
+<a class="jxr_linenumber" name="66" href="#66">66</a>    }
 <a class="jxr_linenumber" name="67" href="#67">67</a>  
-<a class="jxr_linenumber" name="68" href="#68">68</a>    <em class="jxr_comment">//
public static String getConfigPath(String clusterName, String instanceName)</em>
-<a class="jxr_linenumber" name="69" href="#69">69</a>    <em class="jxr_comment">//
{</em>
-<a class="jxr_linenumber" name="70" href="#70">70</a>    <em class="jxr_comment">//
return getConfigPath(clusterName) + "/" + instanceName;</em>
-<a class="jxr_linenumber" name="71" href="#71">71</a>    <em class="jxr_comment">//
}</em>
+<a class="jxr_linenumber" name="68" href="#68">68</a>    <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getCurrentStateBasePath(String
clusterName, String instanceName)
+<a class="jxr_linenumber" name="69" href="#69">69</a>    {
+<a class="jxr_linenumber" name="70" href="#70">70</a>      <strong class="jxr_keyword">return</strong>
getInstancePropertyPath(clusterName, instanceName, PropertyType.CURRENTSTATES);
+<a class="jxr_linenumber" name="71" href="#71">71</a>    }
 <a class="jxr_linenumber" name="72" href="#72">72</a>  
-<a class="jxr_linenumber" name="73" href="#73">73</a>    <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getMessagePath(String clusterName,
String instanceName)
-<a class="jxr_linenumber" name="74" href="#74">74</a>    {
-<a class="jxr_linenumber" name="75" href="#75">75</a>      <strong class="jxr_keyword">return</strong>
getInstancePropertyPath(clusterName, instanceName, PropertyType.MESSAGES);
-<a class="jxr_linenumber" name="76" href="#76">76</a>    }
-<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>
<strong class="jxr_keyword">static</strong> String getCurrentStateBasePath(String
clusterName, String instanceName)
-<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>
getInstancePropertyPath(clusterName, instanceName, PropertyType.CURRENTSTATES);
-<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>    <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="84" href="#84">84</a>  <em class="jxr_javadoccomment">
  * Even though this is simple we want to have the mechanism of bucketing the</em>
-<a class="jxr_linenumber" name="85" href="#85">85</a>  <em class="jxr_javadoccomment">
  * partitions. If we have P partitions and N nodes with K replication factor</em>
-<a class="jxr_linenumber" name="86" href="#86">86</a>  <em class="jxr_javadoccomment">
  * and D databases. Then on each node we will have (P/N)*K*D partitions. And</em>
-<a class="jxr_linenumber" name="87" href="#87">87</a>  <em class="jxr_javadoccomment">
  * cluster manager neeeds to maintain watch on each of these nodes for every</em>
-<a class="jxr_linenumber" name="88" href="#88">88</a>  <em class="jxr_javadoccomment">
  * node. So over all cluster manager will have P*K*D watches which can be</em>
-<a class="jxr_linenumber" name="89" href="#89">89</a>  <em class="jxr_javadoccomment">
  * quite large given that we over partition.</em>
-<a class="jxr_linenumber" name="90" href="#90">90</a>  <em class="jxr_javadoccomment">
  * </em>
-<a class="jxr_linenumber" name="91" href="#91">91</a>  <em class="jxr_javadoccomment">
  * The other extreme is having one znode per storage per database. This will</em>
-<a class="jxr_linenumber" name="92" href="#92">92</a>  <em class="jxr_javadoccomment">
  * result in N*D watches which is good. But data in every node might become</em>
-<a class="jxr_linenumber" name="93" href="#93">93</a>  <em class="jxr_javadoccomment">
  * really big since it has to save partition</em>
-<a class="jxr_linenumber" name="94" href="#94">94</a>  <em class="jxr_javadoccomment">
  * </em>
-<a class="jxr_linenumber" name="95" href="#95">95</a>  <em class="jxr_javadoccomment">
  * Ideally we want to balance between the two models</em>
-<a class="jxr_linenumber" name="96" href="#96">96</a>  <em class="jxr_javadoccomment">
  * </em>
-<a class="jxr_linenumber" name="97" href="#97">97</a>  <em class="jxr_javadoccomment">
  */</em>
-<a class="jxr_linenumber" name="98" href="#98">98</a>    <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getCurrentStatePath(String
clusterName, String instanceName,
-<a class="jxr_linenumber" name="99" href="#99">99</a>        String sessionId,
String stateUnitKey)
-<a class="jxr_linenumber" name="100" href="#100">100</a>   {
-<a class="jxr_linenumber" name="101" href="#101">101</a>     <strong class="jxr_keyword">return</strong>
getInstancePropertyPath(clusterName, instanceName, PropertyType.CURRENTSTATES) + <span
class="jxr_string">"/"</span>
-<a class="jxr_linenumber" name="102" href="#102">102</a>         + sessionId
+ <span class="jxr_string">"/"</span> + stateUnitKey;
+<a class="jxr_linenumber" name="73" href="#73">73</a>    <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="74" href="#74">74</a>  <em class="jxr_javadoccomment">
  * Even though this is simple we want to have the mechanism of bucketing the</em>
+<a class="jxr_linenumber" name="75" href="#75">75</a>  <em class="jxr_javadoccomment">
  * partitions. If we have P partitions and N nodes with K replication factor</em>
+<a class="jxr_linenumber" name="76" href="#76">76</a>  <em class="jxr_javadoccomment">
  * and D databases. Then on each node we will have (P/N)*K*D partitions. And</em>
+<a class="jxr_linenumber" name="77" href="#77">77</a>  <em class="jxr_javadoccomment">
  * cluster manager neeeds to maintain watch on each of these nodes for every</em>
+<a class="jxr_linenumber" name="78" href="#78">78</a>  <em class="jxr_javadoccomment">
  * node. So over all cluster manager will have P*K*D watches which can be</em>
+<a class="jxr_linenumber" name="79" href="#79">79</a>  <em class="jxr_javadoccomment">
  * quite large given that we over partition.</em>
+<a class="jxr_linenumber" name="80" href="#80">80</a>  <em class="jxr_javadoccomment">
  * </em>
+<a class="jxr_linenumber" name="81" href="#81">81</a>  <em class="jxr_javadoccomment">
  * The other extreme is having one znode per storage per database. This will</em>
+<a class="jxr_linenumber" name="82" href="#82">82</a>  <em class="jxr_javadoccomment">
  * result in N*D watches which is good. But data in every node might become</em>
+<a class="jxr_linenumber" name="83" href="#83">83</a>  <em class="jxr_javadoccomment">
  * really big since it has to save partition</em>
+<a class="jxr_linenumber" name="84" href="#84">84</a>  <em class="jxr_javadoccomment">
  * </em>
+<a class="jxr_linenumber" name="85" href="#85">85</a>  <em class="jxr_javadoccomment">
  * Ideally we want to balance between the two models</em>
+<a class="jxr_linenumber" name="86" href="#86">86</a>  <em class="jxr_javadoccomment">
  * </em>
+<a class="jxr_linenumber" name="87" href="#87">87</a>  <em class="jxr_javadoccomment">
  */</em>
+<a class="jxr_linenumber" name="88" href="#88">88</a>    <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getCurrentStatePath(String
clusterName, String instanceName,
+<a class="jxr_linenumber" name="89" href="#89">89</a>        String sessionId,
String stateUnitKey)
+<a class="jxr_linenumber" name="90" href="#90">90</a>    {
+<a class="jxr_linenumber" name="91" href="#91">91</a>      <strong class="jxr_keyword">return</strong>
getInstancePropertyPath(clusterName, instanceName, PropertyType.CURRENTSTATES) + <span
class="jxr_string">"/"</span>
+<a class="jxr_linenumber" name="92" href="#92">92</a>          + sessionId +
<span class="jxr_string">"/"</span> + stateUnitKey;
+<a class="jxr_linenumber" name="93" href="#93">93</a>    }
+<a class="jxr_linenumber" name="94" href="#94">94</a>  
+<a class="jxr_linenumber" name="95" href="#95">95</a>    <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getExternalViewPath(String
clusterName)
+<a class="jxr_linenumber" name="96" href="#96">96</a>    {
+<a class="jxr_linenumber" name="97" href="#97">97</a>      <strong class="jxr_keyword">return</strong>
getPropertyPath(clusterName, PropertyType.EXTERNALVIEW);
+<a class="jxr_linenumber" name="98" href="#98">98</a>    }
+<a class="jxr_linenumber" name="99" href="#99">99</a>  
+<a class="jxr_linenumber" name="100" href="#100">100</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getStateModelDefinitionPath(String
clusterName)
+<a class="jxr_linenumber" name="101" href="#101">101</a>   {
+<a class="jxr_linenumber" name="102" href="#102">102</a>     <strong class="jxr_keyword">return</strong>
getPropertyPath(clusterName, PropertyType.STATEMODELDEFS);
 <a class="jxr_linenumber" name="103" href="#103">103</a>   }
 <a class="jxr_linenumber" name="104" href="#104">104</a> 
-<a class="jxr_linenumber" name="105" href="#105">105</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getExternalViewPath(String
clusterName)
+<a class="jxr_linenumber" name="105" href="#105">105</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getExternalViewPath(String
clusterName, String resourceName)
 <a class="jxr_linenumber" name="106" href="#106">106</a>   {
-<a class="jxr_linenumber" name="107" href="#107">107</a>     <strong class="jxr_keyword">return</strong>
getPropertyPath(clusterName, PropertyType.EXTERNALVIEW);
+<a class="jxr_linenumber" name="107" href="#107">107</a>     <strong class="jxr_keyword">return</strong>
getPropertyPath(clusterName, PropertyType.EXTERNALVIEW) + <span class="jxr_string">"/"</span>
+ resourceName;
 <a class="jxr_linenumber" name="108" href="#108">108</a>   }
 <a class="jxr_linenumber" name="109" href="#109">109</a> 
-<a class="jxr_linenumber" name="110" href="#110">110</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getStateModelDefinitionPath(String
clusterName)
+<a class="jxr_linenumber" name="110" href="#110">110</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getLiveInstancePath(String
clusterName, String instanceName)
 <a class="jxr_linenumber" name="111" href="#111">111</a>   {
-<a class="jxr_linenumber" name="112" href="#112">112</a>     <strong class="jxr_keyword">return</strong>
getPropertyPath(clusterName, PropertyType.STATEMODELDEFS);
+<a class="jxr_linenumber" name="112" href="#112">112</a>     <strong class="jxr_keyword">return</strong>
getPropertyPath(clusterName, PropertyType.LIVEINSTANCES) + <span class="jxr_string">"/"</span>
+ instanceName;
 <a class="jxr_linenumber" name="113" href="#113">113</a>   }
 <a class="jxr_linenumber" name="114" href="#114">114</a> 
-<a class="jxr_linenumber" name="115" href="#115">115</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getExternalViewPath(String
clusterName, String resourceName)
+<a class="jxr_linenumber" name="115" href="#115">115</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getMemberInstancesPath(String
clusterName)
 <a class="jxr_linenumber" name="116" href="#116">116</a>   {
-<a class="jxr_linenumber" name="117" href="#117">117</a>     <strong class="jxr_keyword">return</strong>
getPropertyPath(clusterName, PropertyType.EXTERNALVIEW) + <span class="jxr_string">"/"</span>
+ resourceName;
+<a class="jxr_linenumber" name="117" href="#117">117</a>     <strong class="jxr_keyword">return</strong>
getPropertyPath(clusterName, PropertyType.INSTANCES);
 <a class="jxr_linenumber" name="118" href="#118">118</a>   }
 <a class="jxr_linenumber" name="119" href="#119">119</a> 
-<a class="jxr_linenumber" name="120" href="#120">120</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getLiveInstancePath(String
clusterName, String instanceName)
+<a class="jxr_linenumber" name="120" href="#120">120</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getErrorsPath(String clusterName,
String instanceName)
 <a class="jxr_linenumber" name="121" href="#121">121</a>   {
-<a class="jxr_linenumber" name="122" href="#122">122</a>     <strong class="jxr_keyword">return</strong>
getPropertyPath(clusterName, PropertyType.LIVEINSTANCES) + <span class="jxr_string">"/"</span>
+ instanceName;
+<a class="jxr_linenumber" name="122" href="#122">122</a>     <strong class="jxr_keyword">return</strong>
getInstancePropertyPath(clusterName, instanceName, PropertyType.ERRORS);
 <a class="jxr_linenumber" name="123" href="#123">123</a>   }
 <a class="jxr_linenumber" name="124" href="#124">124</a> 
-<a class="jxr_linenumber" name="125" href="#125">125</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getMemberInstancesPath(String
clusterName)
+<a class="jxr_linenumber" name="125" href="#125">125</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getStatusUpdatesPath(String
clusterName, String instanceName)
 <a class="jxr_linenumber" name="126" href="#126">126</a>   {
-<a class="jxr_linenumber" name="127" href="#127">127</a>     <strong class="jxr_keyword">return</strong>
getPropertyPath(clusterName, PropertyType.INSTANCES);
+<a class="jxr_linenumber" name="127" href="#127">127</a>     <strong class="jxr_keyword">return</strong>
getInstancePropertyPath(clusterName, instanceName, PropertyType.STATUSUPDATES);
 <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">public</strong>
<strong class="jxr_keyword">static</strong> String getErrorsPath(String clusterName,
String instanceName)
+<a class="jxr_linenumber" name="130" href="#130">130</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getHealthPath(String clusterName,
String instanceName)
 <a class="jxr_linenumber" name="131" href="#131">131</a>   {
-<a class="jxr_linenumber" name="132" href="#132">132</a>     <strong class="jxr_keyword">return</strong>
getInstancePropertyPath(clusterName, instanceName, PropertyType.ERRORS);
+<a class="jxr_linenumber" name="132" href="#132">132</a>     <strong class="jxr_keyword">return</strong>
PropertyPathConfig.getPath(PropertyType.HEALTHREPORT, clusterName, instanceName);
 <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">public</strong>
<strong class="jxr_keyword">static</strong> String getStatusUpdatesPath(String
clusterName, String instanceName)
+<a class="jxr_linenumber" name="135" href="#135">135</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getPersistentStatsPath(String
clusterName)
 <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>
getInstancePropertyPath(clusterName, instanceName, PropertyType.STATUSUPDATES);
+<a class="jxr_linenumber" name="137" href="#137">137</a>     <strong class="jxr_keyword">return</strong>
PropertyPathConfig.getPath(PropertyType.PERSISTENTSTATS, clusterName);
 <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">public</strong>
<strong class="jxr_keyword">static</strong> String getHealthPath(String clusterName,
String instanceName)
+<a class="jxr_linenumber" name="140" href="#140">140</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getAlertsPath(String clusterName)
 <a class="jxr_linenumber" name="141" href="#141">141</a>   {
-<a class="jxr_linenumber" name="142" href="#142">142</a>     <strong class="jxr_keyword">return</strong>
PropertyPathConfig.getPath(PropertyType.HEALTHREPORT, clusterName, instanceName);
+<a class="jxr_linenumber" name="142" href="#142">142</a>     <strong class="jxr_keyword">return</strong>
PropertyPathConfig.getPath(PropertyType.ALERTS, clusterName);
 <a class="jxr_linenumber" name="143" href="#143">143</a>   }
 <a class="jxr_linenumber" name="144" href="#144">144</a> 
-<a class="jxr_linenumber" name="145" href="#145">145</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getPersistentStatsPath(String
clusterName)
+<a class="jxr_linenumber" name="145" href="#145">145</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getAlertStatusPath(String clusterName)
 <a class="jxr_linenumber" name="146" href="#146">146</a>   {
-<a class="jxr_linenumber" name="147" href="#147">147</a>     <strong class="jxr_keyword">return</strong>
PropertyPathConfig.getPath(PropertyType.PERSISTENTSTATS, clusterName);
+<a class="jxr_linenumber" name="147" href="#147">147</a>     <strong class="jxr_keyword">return</strong>
PropertyPathConfig.getPath(PropertyType.ALERT_STATUS, clusterName);
 <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">public</strong>
<strong class="jxr_keyword">static</strong> String getAlertsPath(String clusterName)
+<a class="jxr_linenumber" name="150" href="#150">150</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getInstanceNameFromPath(String
path)
 <a class="jxr_linenumber" name="151" href="#151">151</a>   {
-<a class="jxr_linenumber" name="152" href="#152">152</a>     <strong class="jxr_keyword">return</strong>
PropertyPathConfig.getPath(PropertyType.ALERTS, clusterName);
-<a class="jxr_linenumber" name="153" href="#153">153</a>   }
-<a class="jxr_linenumber" name="154" href="#154">154</a> 
-<a class="jxr_linenumber" name="155" href="#155">155</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getAlertStatusPath(String clusterName)
-<a class="jxr_linenumber" name="156" href="#156">156</a>   {
-<a class="jxr_linenumber" name="157" href="#157">157</a>     <strong class="jxr_keyword">return</strong>
PropertyPathConfig.getPath(PropertyType.ALERT_STATUS, clusterName);
-<a class="jxr_linenumber" name="158" href="#158">158</a>   }
-<a class="jxr_linenumber" name="159" href="#159">159</a> 
-<a class="jxr_linenumber" name="160" href="#160">160</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getInstanceNameFromPath(String
path)
-<a class="jxr_linenumber" name="161" href="#161">161</a>   {
-<a class="jxr_linenumber" name="162" href="#162">162</a>     <em class="jxr_comment">//
path structure</em>
-<a class="jxr_linenumber" name="163" href="#163">163</a>     <em class="jxr_comment">//
/&lt;cluster_name&gt;/instances/&lt;instance_name&gt;/[currentStates/messages]</em>
-<a class="jxr_linenumber" name="164" href="#164">164</a>     <strong class="jxr_keyword">if</strong>
(path.contains(<span class="jxr_string">"/"</span> + PropertyType.INSTANCES +
<span class="jxr_string">"/"</span>))
-<a class="jxr_linenumber" name="165" href="#165">165</a>     {
-<a class="jxr_linenumber" name="166" href="#166">166</a>       String[] split
= path.split(<span class="jxr_string">"&#92;&#92;/"</span>);
-<a class="jxr_linenumber" name="167" href="#167">167</a>       <strong class="jxr_keyword">if</strong>
(split.length &gt; 3)
-<a class="jxr_linenumber" name="168" href="#168">168</a>       {
-<a class="jxr_linenumber" name="169" href="#169">169</a>         <strong class="jxr_keyword">return</strong>
split[3];
-<a class="jxr_linenumber" name="170" href="#170">170</a>       }
-<a class="jxr_linenumber" name="171" href="#171">171</a>     }
-<a class="jxr_linenumber" name="172" href="#172">172</a>     <strong class="jxr_keyword">return</strong>
<strong class="jxr_keyword">null</strong>;
-<a class="jxr_linenumber" name="173" href="#173">173</a>   }
-<a class="jxr_linenumber" name="174" href="#174">174</a> 
-<a class="jxr_linenumber" name="175" href="#175">175</a>   <em class="jxr_comment">//
distributed cluster controller</em>
-<a class="jxr_linenumber" name="176" href="#176">176</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getControllerPath(String clusterName)
-<a class="jxr_linenumber" name="177" href="#177">177</a>   {
-<a class="jxr_linenumber" name="178" href="#178">178</a>     <strong class="jxr_keyword">return</strong>
getPropertyPath(clusterName, PropertyType.CONTROLLER);
-<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">public</strong>
<strong class="jxr_keyword">static</strong> String getControllerPropertyPath(String
clusterName, <a href="../../../../org/apache/helix/PropertyType.html">PropertyType</a>
type)
-<a class="jxr_linenumber" name="182" href="#182">182</a>   {
-<a class="jxr_linenumber" name="183" href="#183">183</a>     <strong class="jxr_keyword">return</strong>
PropertyPathConfig.getPath(type, clusterName);
-<a class="jxr_linenumber" name="184" href="#184">184</a>   }
-<a class="jxr_linenumber" name="185" href="#185">185</a> }
+<a class="jxr_linenumber" name="152" href="#152">152</a>     <em class="jxr_comment">//
path structure</em>
+<a class="jxr_linenumber" name="153" href="#153">153</a>     <em class="jxr_comment">//
/&lt;cluster_name&gt;/instances/&lt;instance_name&gt;/[currentStates/messages]</em>
+<a class="jxr_linenumber" name="154" href="#154">154</a>     <strong class="jxr_keyword">if</strong>
(path.contains(<span class="jxr_string">"/"</span> + PropertyType.INSTANCES +
<span class="jxr_string">"/"</span>))
+<a class="jxr_linenumber" name="155" href="#155">155</a>     {
+<a class="jxr_linenumber" name="156" href="#156">156</a>       String[] split
= path.split(<span class="jxr_string">"&#92;&#92;/"</span>);
+<a class="jxr_linenumber" name="157" href="#157">157</a>       <strong class="jxr_keyword">if</strong>
(split.length &gt; 3)
+<a class="jxr_linenumber" name="158" href="#158">158</a>       {
+<a class="jxr_linenumber" name="159" href="#159">159</a>         <strong class="jxr_keyword">return</strong>
split[3];
+<a class="jxr_linenumber" name="160" href="#160">160</a>       }
+<a class="jxr_linenumber" name="161" href="#161">161</a>     }
+<a class="jxr_linenumber" name="162" href="#162">162</a>     <strong class="jxr_keyword">return</strong>
<strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="163" href="#163">163</a>   }
+<a class="jxr_linenumber" name="164" href="#164">164</a> 
+<a class="jxr_linenumber" name="165" href="#165">165</a>   <em class="jxr_comment">//
distributed cluster controller</em>
+<a class="jxr_linenumber" name="166" href="#166">166</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getControllerPath(String clusterName)
+<a class="jxr_linenumber" name="167" href="#167">167</a>   {
+<a class="jxr_linenumber" name="168" href="#168">168</a>     <strong class="jxr_keyword">return</strong>
getPropertyPath(clusterName, PropertyType.CONTROLLER);
+<a class="jxr_linenumber" name="169" href="#169">169</a>   }
+<a class="jxr_linenumber" name="170" href="#170">170</a> 
+<a class="jxr_linenumber" name="171" href="#171">171</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getControllerPropertyPath(String
clusterName, <a href="../../../../org/apache/helix/PropertyType.html">PropertyType</a>
type)
+<a class="jxr_linenumber" name="172" href="#172">172</a>   {
+<a class="jxr_linenumber" name="173" href="#173">173</a>     <strong class="jxr_keyword">return</strong>
PropertyPathConfig.getPath(type, clusterName);
+<a class="jxr_linenumber" name="174" href="#174">174</a>   }
+<a class="jxr_linenumber" name="175" href="#175">175</a>   
+<a class="jxr_linenumber" name="176" href="#176">176</a>   <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="177" href="#177">177</a> <em class="jxr_javadoccomment">
  * get the parent-path of given path</em>
+<a class="jxr_linenumber" name="178" href="#178">178</a> <em class="jxr_javadoccomment">
  * return "/" string if path = "/xxx", null if path = "/"</em>
+<a class="jxr_linenumber" name="179" href="#179">179</a> <em class="jxr_javadoccomment">
  * </em>
+<a class="jxr_linenumber" name="180" href="#180">180</a> <em class="jxr_javadoccomment">
  * @param path</em>
+<a class="jxr_linenumber" name="181" href="#181">181</a> <em class="jxr_javadoccomment">
  * @return</em>
+<a class="jxr_linenumber" name="182" href="#182">182</a> <em class="jxr_javadoccomment">
  */</em>
+<a class="jxr_linenumber" name="183" href="#183">183</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getZkParentPath(String path)
{
+<a class="jxr_linenumber" name="184" href="#184">184</a>       <strong class="jxr_keyword">if</strong>
(path.equals(<span class="jxr_string">"/"</span>)) {
+<a class="jxr_linenumber" name="185" href="#185">185</a>           <strong
class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="186" href="#186">186</a>       }
+<a class="jxr_linenumber" name="187" href="#187">187</a>       
+<a class="jxr_linenumber" name="188" href="#188">188</a>       <strong class="jxr_keyword">int</strong>
idx = path.lastIndexOf('/');
+<a class="jxr_linenumber" name="189" href="#189">189</a>       <strong class="jxr_keyword">return</strong>
idx == 0? <span class="jxr_string">"/"</span> : path.substring(0, idx);
+<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>   <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="193" href="#193">193</a> <em class="jxr_javadoccomment">
  * get the last part of the zk-path</em>
+<a class="jxr_linenumber" name="194" href="#194">194</a> <em class="jxr_javadoccomment">
  * </em>
+<a class="jxr_linenumber" name="195" href="#195">195</a> <em class="jxr_javadoccomment">
  * @param path</em>
+<a class="jxr_linenumber" name="196" href="#196">196</a> <em class="jxr_javadoccomment">
  * @return</em>
+<a class="jxr_linenumber" name="197" href="#197">197</a> <em class="jxr_javadoccomment">
  */</em>
+<a class="jxr_linenumber" name="198" href="#198">198</a>   <strong class="jxr_keyword">public</strong>
<strong class="jxr_keyword">static</strong> String getZkName(String path) {
+<a class="jxr_linenumber" name="199" href="#199">199</a>       <strong class="jxr_keyword">return</strong>
path.substring(path.lastIndexOf('/') + 1);
+<a class="jxr_linenumber" name="200" href="#200">200</a>   }
+<a class="jxr_linenumber" name="201" href="#201">201</a> }
 </pre>
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