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From kisho...@apache.org
Subject svn commit: r1479756 [36/39] - in /incubator/helix/site-content: ./ apidocs/reference/org/apache/helix/ apidocs/reference/org/apache/helix/agent/ apidocs/reference/org/apache/helix/manager/zk/ apidocs/reference/org/apache/helix/messaging/handling/ apid...
Date Tue, 07 May 2013 03:11:00 GMT
Modified: incubator/helix/site-content/xref/org/apache/helix/servicediscovery/ServiceDiscovery.html
URL: http://svn.apache.org/viewvc/incubator/helix/site-content/xref/org/apache/helix/servicediscovery/ServiceDiscovery.html?rev=1479756&r1=1479755&r2=1479756&view=diff
==============================================================================
--- incubator/helix/site-content/xref/org/apache/helix/servicediscovery/ServiceDiscovery.html (original)
+++ incubator/helix/site-content/xref/org/apache/helix/servicediscovery/ServiceDiscovery.html Tue May  7 03:10:53 2013
@@ -9,208 +9,226 @@
 <div id="overview"><a href="../../../../../apidocs/org/apache/helix/servicediscovery/ServiceDiscovery.html">View Javadoc</a></div><pre>
 
 <a class="jxr_linenumber" name="1" href="#1">1</a>   <strong class="jxr_keyword">package</strong> org.apache.helix.servicediscovery;
-<a class="jxr_linenumber" name="2" href="#2">2</a>   
-<a class="jxr_linenumber" name="3" href="#3">3</a>   <strong class="jxr_keyword">import</strong> java.util.ArrayList;
-<a class="jxr_linenumber" name="4" href="#4">4</a>   <strong class="jxr_keyword">import</strong> java.util.Collections;
-<a class="jxr_linenumber" name="5" href="#5">5</a>   <strong class="jxr_keyword">import</strong> java.util.Date;
-<a class="jxr_linenumber" name="6" href="#6">6</a>   <strong class="jxr_keyword">import</strong> java.util.HashMap;
-<a class="jxr_linenumber" name="7" href="#7">7</a>   <strong class="jxr_keyword">import</strong> java.util.List;
-<a class="jxr_linenumber" name="8" href="#8">8</a>   <strong class="jxr_keyword">import</strong> java.util.Map;
-<a class="jxr_linenumber" name="9" href="#9">9</a>   <strong class="jxr_keyword">import</strong> java.util.Timer;
-<a class="jxr_linenumber" name="10" href="#10">10</a>  <strong class="jxr_keyword">import</strong> java.util.TimerTask;
-<a class="jxr_linenumber" name="11" href="#11">11</a>  
-<a class="jxr_linenumber" name="12" href="#12">12</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.HelixDataAccessor;
-<a class="jxr_linenumber" name="13" href="#13">13</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.HelixManager;
-<a class="jxr_linenumber" name="14" href="#14">14</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.HelixManagerFactory;
-<a class="jxr_linenumber" name="15" href="#15">15</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.InstanceType;
-<a class="jxr_linenumber" name="16" href="#16">16</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.LiveInstanceChangeListener;
-<a class="jxr_linenumber" name="17" href="#17">17</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.LiveInstanceInfoProvider;
-<a class="jxr_linenumber" name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.NotificationContext;
-<a class="jxr_linenumber" name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.PropertyKey;
-<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.PropertyKey.Builder;
-<a class="jxr_linenumber" name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.ZNRecord;
-<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.manager.zk.ZKHelixManager;
-<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.HelixConfigScope;
-<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.HelixConfigScope.ConfigScopeProperty;
-<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.LiveInstance;
-<a class="jxr_linenumber" name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.builder.HelixConfigScopeBuilder;
-<a class="jxr_linenumber" name="27" href="#27">27</a>  
-<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">ServiceDiscovery</a>
-<a class="jxr_linenumber" name="29" href="#29">29</a>  {
-<a class="jxr_linenumber" name="30" href="#30">30</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> String zkAddress;
-<a class="jxr_linenumber" name="31" href="#31">31</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> String cluster;
-<a class="jxr_linenumber" name="32" href="#32">32</a>    <strong class="jxr_keyword">private</strong> <a href="../../../../org/apache/helix/HelixManager.html">HelixManager</a> admin;
-<a class="jxr_linenumber" name="33" href="#33">33</a>    List&lt;ServiceMetadata&gt; cache;
-<a class="jxr_linenumber" name="34" href="#34">34</a>    <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> DEFAULT_POLL_INTERVAL = 30 * 1000; <em class="jxr_comment">// in ms</em>
-<a class="jxr_linenumber" name="35" href="#35">35</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">Mode</a> mode;
-<a class="jxr_linenumber" name="36" href="#36">36</a>    Map&lt;String, HelixManager&gt; serviceMap;
-<a class="jxr_linenumber" name="37" href="#37">37</a>    <strong class="jxr_keyword">private</strong> Timer timer;
-<a class="jxr_linenumber" name="38" href="#38">38</a>  
-<a class="jxr_linenumber" name="39" href="#39">39</a>    enum <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">Mode</a>
-<a class="jxr_linenumber" name="40" href="#40">40</a>    {
-<a class="jxr_linenumber" name="41" href="#41">41</a>      NONE, <em class="jxr_comment">// No monitoring, only registration, on demand reading zk</em>
-<a class="jxr_linenumber" name="42" href="#42">42</a>      WATCH, <em class="jxr_comment">// Watches ZK path</em>
-<a class="jxr_linenumber" name="43" href="#43">43</a>      POLL<em class="jxr_comment">// Polls zk at some intervals</em>
-<a class="jxr_linenumber" name="44" href="#44">44</a>    }
+<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment">/*</em>
+<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one</em>
+<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * or more contributor license agreements.  See the NOTICE file</em>
+<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * distributed with this work for additional information</em>
+<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * regarding copyright ownership.  The ASF licenses this file</em>
+<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> * to you under the Apache License, Version 2.0 (the</em>
+<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> * "License"); you may not use this file except in compliance</em>
+<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> * with the License.  You may obtain a copy of the License at</em>
+<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> *</em>
+<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> *   <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
+<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> *</em>
+<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing,</em>
+<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * software distributed under the License is distributed on an</em>
+<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em>
+<a class="jxr_linenumber" name="16" href="#16">16</a>  <em class="jxr_comment"> * KIND, either express or implied.  See the License for the</em>
+<a class="jxr_linenumber" name="17" href="#17">17</a>  <em class="jxr_comment"> * specific language governing permissions and limitations</em>
+<a class="jxr_linenumber" name="18" href="#18">18</a>  <em class="jxr_comment"> * under the License.</em>
+<a class="jxr_linenumber" name="19" href="#19">19</a>  <em class="jxr_comment"> */</em>
+<a class="jxr_linenumber" name="20" href="#20">20</a>  
+<a class="jxr_linenumber" name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> java.util.ArrayList;
+<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> java.util.Collections;
+<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> java.util.Date;
+<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> java.util.HashMap;
+<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> java.util.List;
+<a class="jxr_linenumber" name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> java.util.Map;
+<a class="jxr_linenumber" name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> java.util.Timer;
+<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> java.util.TimerTask;
+<a class="jxr_linenumber" name="29" href="#29">29</a>  
+<a class="jxr_linenumber" name="30" href="#30">30</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.HelixDataAccessor;
+<a class="jxr_linenumber" name="31" href="#31">31</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.HelixManager;
+<a class="jxr_linenumber" name="32" href="#32">32</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.HelixManagerFactory;
+<a class="jxr_linenumber" name="33" href="#33">33</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.InstanceType;
+<a class="jxr_linenumber" name="34" href="#34">34</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.LiveInstanceChangeListener;
+<a class="jxr_linenumber" name="35" href="#35">35</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.LiveInstanceInfoProvider;
+<a class="jxr_linenumber" name="36" href="#36">36</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.NotificationContext;
+<a class="jxr_linenumber" name="37" href="#37">37</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.PropertyKey;
+<a class="jxr_linenumber" name="38" href="#38">38</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.PropertyKey.Builder;
+<a class="jxr_linenumber" name="39" href="#39">39</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.ZNRecord;
+<a class="jxr_linenumber" name="40" href="#40">40</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.manager.zk.ZKHelixManager;
+<a class="jxr_linenumber" name="41" href="#41">41</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.HelixConfigScope;
+<a class="jxr_linenumber" name="42" href="#42">42</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.HelixConfigScope.ConfigScopeProperty;
+<a class="jxr_linenumber" name="43" href="#43">43</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.LiveInstance;
+<a class="jxr_linenumber" name="44" href="#44">44</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.model.builder.HelixConfigScopeBuilder;
 <a class="jxr_linenumber" name="45" href="#45">45</a>  
-<a class="jxr_linenumber" name="46" href="#46">46</a>    <strong class="jxr_keyword">public</strong> <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">ServiceDiscovery</a>(String zkAddress, String cluster, <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">Mode</a> mode)
-<a class="jxr_linenumber" name="47" href="#47">47</a>    {
-<a class="jxr_linenumber" name="48" href="#48">48</a>      <strong class="jxr_keyword">this</strong>.zkAddress = zkAddress;
-<a class="jxr_linenumber" name="49" href="#49">49</a>      <strong class="jxr_keyword">this</strong>.cluster = cluster;
-<a class="jxr_linenumber" name="50" href="#50">50</a>      <strong class="jxr_keyword">this</strong>.mode = mode;
-<a class="jxr_linenumber" name="51" href="#51">51</a>      serviceMap = <strong class="jxr_keyword">new</strong> HashMap&lt;String, HelixManager&gt;();
-<a class="jxr_linenumber" name="52" href="#52">52</a>      cache = Collections.emptyList();
-<a class="jxr_linenumber" name="53" href="#53">53</a>    }
-<a class="jxr_linenumber" name="54" href="#54">54</a>  
-<a class="jxr_linenumber" name="55" href="#55">55</a>    <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="56" href="#56">56</a>  <em class="jxr_javadoccomment">   * </em>
-<a class="jxr_linenumber" name="57" href="#57">57</a>  <em class="jxr_javadoccomment">   * @return returns true if</em>
-<a class="jxr_linenumber" name="58" href="#58">58</a>  <em class="jxr_javadoccomment">   */</em>
-<a class="jxr_linenumber" name="59" href="#59">59</a>    <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> start() <strong class="jxr_keyword">throws</strong> Exception
-<a class="jxr_linenumber" name="60" href="#60">60</a>    {
-<a class="jxr_linenumber" name="61" href="#61">61</a>      <em class="jxr_comment">// auto create cluster and allow nodes to automatically join the cluster</em>
-<a class="jxr_linenumber" name="62" href="#62">62</a>      admin = HelixManagerFactory.getZKHelixManager(cluster, <span class="jxr_string">"service-discovery"</span>,
-<a class="jxr_linenumber" name="63" href="#63">63</a>          InstanceType.ADMINISTRATOR, zkAddress);
-<a class="jxr_linenumber" name="64" href="#64">64</a>      admin.connect();
-<a class="jxr_linenumber" name="65" href="#65">65</a>      admin.getClusterManagmentTool().addCluster(cluster, false);
-<a class="jxr_linenumber" name="66" href="#66">66</a>      <a href="../../../../org/apache/helix/model/HelixConfigScope.html">HelixConfigScope</a> scope = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/model/builder/HelixConfigScopeBuilder.html">HelixConfigScopeBuilder</a>(
-<a class="jxr_linenumber" name="67" href="#67">67</a>          ConfigScopeProperty.CLUSTER).forCluster(cluster).build();
-<a class="jxr_linenumber" name="68" href="#68">68</a>  
-<a class="jxr_linenumber" name="69" href="#69">69</a>      Map&lt;String, String&gt; properties = <strong class="jxr_keyword">new</strong> HashMap&lt;String, String&gt;();
-<a class="jxr_linenumber" name="70" href="#70">70</a>      properties.put(ZKHelixManager.ALLOW_PARTICIPANT_AUTO_JOIN,
-<a class="jxr_linenumber" name="71" href="#71">71</a>          String.valueOf(<strong class="jxr_keyword">true</strong>));
-<a class="jxr_linenumber" name="72" href="#72">72</a>      admin.getClusterManagmentTool().setConfig(scope, properties);
-<a class="jxr_linenumber" name="73" href="#73">73</a>      <strong class="jxr_keyword">switch</strong> (mode)
-<a class="jxr_linenumber" name="74" href="#74">74</a>      {
-<a class="jxr_linenumber" name="75" href="#75">75</a>      <strong class="jxr_keyword">case</strong> POLL:
-<a class="jxr_linenumber" name="76" href="#76">76</a>        startBackgroundTask();
-<a class="jxr_linenumber" name="77" href="#77">77</a>        <strong class="jxr_keyword">break</strong>;
-<a class="jxr_linenumber" name="78" href="#78">78</a>      <strong class="jxr_keyword">case</strong> WATCH:
-<a class="jxr_linenumber" name="79" href="#79">79</a>        setupWatcher();
-<a class="jxr_linenumber" name="80" href="#80">80</a>        <strong class="jxr_keyword">break</strong>;
-<a class="jxr_linenumber" name="81" href="#81">81</a>      <strong class="jxr_keyword">case</strong> NONE:<em class="jxr_comment">// dont monitor changes, supports only registration</em>
-<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>      refreshCache();
-<a class="jxr_linenumber" name="85" href="#85">85</a>      <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
-<a class="jxr_linenumber" name="86" href="#86">86</a>    }
-<a class="jxr_linenumber" name="87" href="#87">87</a>  
-<a class="jxr_linenumber" name="88" href="#88">88</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> startBackgroundTask()
-<a class="jxr_linenumber" name="89" href="#89">89</a>    {
-<a class="jxr_linenumber" name="90" href="#90">90</a>      TimerTask timertask = <strong class="jxr_keyword">new</strong> TimerTask()
-<a class="jxr_linenumber" name="91" href="#91">91</a>      {
-<a class="jxr_linenumber" name="92" href="#92">92</a>  
-<a class="jxr_linenumber" name="93" href="#93">93</a>        @Override
-<a class="jxr_linenumber" name="94" href="#94">94</a>        <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> run()
-<a class="jxr_linenumber" name="95" href="#95">95</a>        {
-<a class="jxr_linenumber" name="96" href="#96">96</a>          refreshCache();
-<a class="jxr_linenumber" name="97" href="#97">97</a>        }
-<a class="jxr_linenumber" name="98" href="#98">98</a>      };
-<a class="jxr_linenumber" name="99" href="#99">99</a>      timer = <strong class="jxr_keyword">new</strong> Timer();
-<a class="jxr_linenumber" name="100" href="#100">100</a>     timer.scheduleAtFixedRate(timertask, DEFAULT_POLL_INTERVAL, DEFAULT_POLL_INTERVAL);
-<a class="jxr_linenumber" name="101" href="#101">101</a>   }
-<a class="jxr_linenumber" name="102" href="#102">102</a> 
-<a class="jxr_linenumber" name="103" href="#103">103</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> setupWatcher() <strong class="jxr_keyword">throws</strong> Exception
-<a class="jxr_linenumber" name="104" href="#104">104</a>   {
+<a class="jxr_linenumber" name="46" href="#46">46</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">ServiceDiscovery</a>
+<a class="jxr_linenumber" name="47" href="#47">47</a>  {
+<a class="jxr_linenumber" name="48" href="#48">48</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> String zkAddress;
+<a class="jxr_linenumber" name="49" href="#49">49</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> String cluster;
+<a class="jxr_linenumber" name="50" href="#50">50</a>    <strong class="jxr_keyword">private</strong> <a href="../../../../org/apache/helix/HelixManager.html">HelixManager</a> admin;
+<a class="jxr_linenumber" name="51" href="#51">51</a>    List&lt;ServiceMetadata&gt; cache;
+<a class="jxr_linenumber" name="52" href="#52">52</a>    <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> DEFAULT_POLL_INTERVAL = 30 * 1000; <em class="jxr_comment">// in ms</em>
+<a class="jxr_linenumber" name="53" href="#53">53</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">Mode</a> mode;
+<a class="jxr_linenumber" name="54" href="#54">54</a>    Map&lt;String, HelixManager&gt; serviceMap;
+<a class="jxr_linenumber" name="55" href="#55">55</a>    <strong class="jxr_keyword">private</strong> Timer timer;
+<a class="jxr_linenumber" name="56" href="#56">56</a>  
+<a class="jxr_linenumber" name="57" href="#57">57</a>    enum <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">Mode</a>
+<a class="jxr_linenumber" name="58" href="#58">58</a>    {
+<a class="jxr_linenumber" name="59" href="#59">59</a>      NONE, <em class="jxr_comment">// No monitoring, only registration, on demand reading zk</em>
+<a class="jxr_linenumber" name="60" href="#60">60</a>      WATCH, <em class="jxr_comment">// Watches ZK path</em>
+<a class="jxr_linenumber" name="61" href="#61">61</a>      POLL<em class="jxr_comment">// Polls zk at some intervals</em>
+<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> <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">ServiceDiscovery</a>(String zkAddress, String cluster, <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">Mode</a> mode)
+<a class="jxr_linenumber" name="65" href="#65">65</a>    {
+<a class="jxr_linenumber" name="66" href="#66">66</a>      <strong class="jxr_keyword">this</strong>.zkAddress = zkAddress;
+<a class="jxr_linenumber" name="67" href="#67">67</a>      <strong class="jxr_keyword">this</strong>.cluster = cluster;
+<a class="jxr_linenumber" name="68" href="#68">68</a>      <strong class="jxr_keyword">this</strong>.mode = mode;
+<a class="jxr_linenumber" name="69" href="#69">69</a>      serviceMap = <strong class="jxr_keyword">new</strong> HashMap&lt;String, HelixManager&gt;();
+<a class="jxr_linenumber" name="70" href="#70">70</a>      cache = Collections.emptyList();
+<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>    <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="74" href="#74">74</a>  <em class="jxr_javadoccomment">   * </em>
+<a class="jxr_linenumber" name="75" href="#75">75</a>  <em class="jxr_javadoccomment">   * @return returns true if</em>
+<a class="jxr_linenumber" name="76" href="#76">76</a>  <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="77" href="#77">77</a>    <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> start() <strong class="jxr_keyword">throws</strong> Exception
+<a class="jxr_linenumber" name="78" href="#78">78</a>    {
+<a class="jxr_linenumber" name="79" href="#79">79</a>      <em class="jxr_comment">// auto create cluster and allow nodes to automatically join the cluster</em>
+<a class="jxr_linenumber" name="80" href="#80">80</a>      admin = HelixManagerFactory.getZKHelixManager(cluster, <span class="jxr_string">"service-discovery"</span>,
+<a class="jxr_linenumber" name="81" href="#81">81</a>          InstanceType.ADMINISTRATOR, zkAddress);
+<a class="jxr_linenumber" name="82" href="#82">82</a>      admin.connect();
+<a class="jxr_linenumber" name="83" href="#83">83</a>      admin.getClusterManagmentTool().addCluster(cluster, false);
+<a class="jxr_linenumber" name="84" href="#84">84</a>      <a href="../../../../org/apache/helix/model/HelixConfigScope.html">HelixConfigScope</a> scope = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/model/builder/HelixConfigScopeBuilder.html">HelixConfigScopeBuilder</a>(
+<a class="jxr_linenumber" name="85" href="#85">85</a>          ConfigScopeProperty.CLUSTER).forCluster(cluster).build();
+<a class="jxr_linenumber" name="86" href="#86">86</a>  
+<a class="jxr_linenumber" name="87" href="#87">87</a>      Map&lt;String, String&gt; properties = <strong class="jxr_keyword">new</strong> HashMap&lt;String, String&gt;();
+<a class="jxr_linenumber" name="88" href="#88">88</a>      properties.put(ZKHelixManager.ALLOW_PARTICIPANT_AUTO_JOIN,
+<a class="jxr_linenumber" name="89" href="#89">89</a>          String.valueOf(<strong class="jxr_keyword">true</strong>));
+<a class="jxr_linenumber" name="90" href="#90">90</a>      admin.getClusterManagmentTool().setConfig(scope, properties);
+<a class="jxr_linenumber" name="91" href="#91">91</a>      <strong class="jxr_keyword">switch</strong> (mode)
+<a class="jxr_linenumber" name="92" href="#92">92</a>      {
+<a class="jxr_linenumber" name="93" href="#93">93</a>      <strong class="jxr_keyword">case</strong> POLL:
+<a class="jxr_linenumber" name="94" href="#94">94</a>        startBackgroundTask();
+<a class="jxr_linenumber" name="95" href="#95">95</a>        <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="96" href="#96">96</a>      <strong class="jxr_keyword">case</strong> WATCH:
+<a class="jxr_linenumber" name="97" href="#97">97</a>        setupWatcher();
+<a class="jxr_linenumber" name="98" href="#98">98</a>        <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="99" href="#99">99</a>      <strong class="jxr_keyword">case</strong> NONE:<em class="jxr_comment">// dont monitor changes, supports only registration</em>
+<a class="jxr_linenumber" name="100" href="#100">100</a> 
+<a class="jxr_linenumber" name="101" href="#101">101</a>     }
+<a class="jxr_linenumber" name="102" href="#102">102</a>     refreshCache();
+<a class="jxr_linenumber" name="103" href="#103">103</a>     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
+<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>     <a href="../../../../org/apache/helix/LiveInstanceChangeListener.html">LiveInstanceChangeListener</a> listener = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/LiveInstanceChangeListener.html">LiveInstanceChangeListener</a>()
-<a class="jxr_linenumber" name="107" href="#107">107</a>     {
-<a class="jxr_linenumber" name="108" href="#108">108</a>       @Override
-<a class="jxr_linenumber" name="109" href="#109">109</a>       <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> onLiveInstanceChange(List&lt;LiveInstance&gt; liveInstances,
-<a class="jxr_linenumber" name="110" href="#110">110</a>           <a href="../../../../org/apache/helix/NotificationContext.html">NotificationContext</a> changeContext)
-<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>(changeContext.getType() != NotificationContext.Type.FINALIZE){
-<a class="jxr_linenumber" name="113" href="#113">113</a>           refreshCache();
-<a class="jxr_linenumber" name="114" href="#114">114</a>         }
+<a class="jxr_linenumber" name="106" href="#106">106</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> startBackgroundTask()
+<a class="jxr_linenumber" name="107" href="#107">107</a>   {
+<a class="jxr_linenumber" name="108" href="#108">108</a>     TimerTask timertask = <strong class="jxr_keyword">new</strong> TimerTask()
+<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>       @Override
+<a class="jxr_linenumber" name="112" href="#112">112</a>       <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> run()
+<a class="jxr_linenumber" name="113" href="#113">113</a>       {
+<a class="jxr_linenumber" name="114" href="#114">114</a>         refreshCache();
 <a class="jxr_linenumber" name="115" href="#115">115</a>       }
 <a class="jxr_linenumber" name="116" href="#116">116</a>     };
-<a class="jxr_linenumber" name="117" href="#117">117</a>     admin.addLiveInstanceChangeListener(listener);
-<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">boolean</strong> stop()
-<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> (admin != <strong class="jxr_keyword">null</strong> &amp;&amp; admin.isConnected())
-<a class="jxr_linenumber" name="123" href="#123">123</a>     {
-<a class="jxr_linenumber" name="124" href="#124">124</a>       admin.disconnect();
-<a class="jxr_linenumber" name="125" href="#125">125</a>     }
-<a class="jxr_linenumber" name="126" href="#126">126</a>     <strong class="jxr_keyword">if</strong> (timer != <strong class="jxr_keyword">null</strong>)
-<a class="jxr_linenumber" name="127" href="#127">127</a>     {
-<a class="jxr_linenumber" name="128" href="#128">128</a>       timer.cancel();
-<a class="jxr_linenumber" name="129" href="#129">129</a>     }
-<a class="jxr_linenumber" name="130" href="#130">130</a>     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
-<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">public</strong> <strong class="jxr_keyword">void</strong> deregister(<strong class="jxr_keyword">final</strong> String serviceId)
-<a class="jxr_linenumber" name="134" href="#134">134</a>   {
-<a class="jxr_linenumber" name="135" href="#135">135</a>     <a href="../../../../org/apache/helix/HelixManager.html">HelixManager</a> helixManager = serviceMap.get(serviceId);
-<a class="jxr_linenumber" name="136" href="#136">136</a>     <strong class="jxr_keyword">if</strong> (helixManager != <strong class="jxr_keyword">null</strong> &amp;&amp; helixManager.isConnected())
-<a class="jxr_linenumber" name="137" href="#137">137</a>     {
-<a class="jxr_linenumber" name="138" href="#138">138</a>       helixManager.disconnect();
-<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> 
-<a class="jxr_linenumber" name="142" href="#142">142</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> register(<strong class="jxr_keyword">final</strong> String serviceId,
-<a class="jxr_linenumber" name="143" href="#143">143</a>       <strong class="jxr_keyword">final</strong> <a href="../../../../org/apache/helix/servicediscovery/ServiceMetadata.html">ServiceMetadata</a> serviceMetadata) <strong class="jxr_keyword">throws</strong> Exception
-<a class="jxr_linenumber" name="144" href="#144">144</a>   {
-<a class="jxr_linenumber" name="145" href="#145">145</a>     <a href="../../../../org/apache/helix/HelixManager.html">HelixManager</a> helixManager = HelixManagerFactory.getZKHelixManager(cluster,
-<a class="jxr_linenumber" name="146" href="#146">146</a>         serviceId, InstanceType.PARTICIPANT, zkAddress);
-<a class="jxr_linenumber" name="147" href="#147">147</a>     <a href="../../../../org/apache/helix/LiveInstanceInfoProvider.html">LiveInstanceInfoProvider</a> liveInstanceInfoProvider = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/LiveInstanceInfoProvider.html">LiveInstanceInfoProvider</a>()
-<a class="jxr_linenumber" name="148" href="#148">148</a>     {
-<a class="jxr_linenumber" name="149" href="#149">149</a>       @Override
-<a class="jxr_linenumber" name="150" href="#150">150</a>       <strong class="jxr_keyword">public</strong> <a href="../../../../org/apache/helix/ZNRecord.html">ZNRecord</a> getAdditionalLiveInstanceInfo()
-<a class="jxr_linenumber" name="151" href="#151">151</a>       {
-<a class="jxr_linenumber" name="152" href="#152">152</a>         <em class="jxr_comment">// serialize serviceMetadata to ZNRecord</em>
-<a class="jxr_linenumber" name="153" href="#153">153</a>         <a href="../../../../org/apache/helix/ZNRecord.html">ZNRecord</a> rec = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/ZNRecord.html">ZNRecord</a>(serviceId);
-<a class="jxr_linenumber" name="154" href="#154">154</a>         rec.setSimpleField(<span class="jxr_string">"HOST"</span>, serviceMetadata.getHost());
-<a class="jxr_linenumber" name="155" href="#155">155</a>         rec.setSimpleField(<span class="jxr_string">"PORT"</span>, String.valueOf(serviceMetadata.getPort()));
-<a class="jxr_linenumber" name="156" href="#156">156</a>         rec.setSimpleField(<span class="jxr_string">"SERVICE_NAME"</span>, serviceMetadata.getServiceName());
-<a class="jxr_linenumber" name="157" href="#157">157</a>         <strong class="jxr_keyword">return</strong> rec;
-<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>     helixManager.setLiveInstanceInfoProvider(liveInstanceInfoProvider);
-<a class="jxr_linenumber" name="161" href="#161">161</a>     helixManager.connect();
-<a class="jxr_linenumber" name="162" href="#162">162</a>     serviceMap.put(serviceId, helixManager);
-<a class="jxr_linenumber" name="163" href="#163">163</a>     refreshCache();
-<a class="jxr_linenumber" name="164" href="#164">164</a>     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
-<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>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> refreshCache()
-<a class="jxr_linenumber" name="168" href="#168">168</a>   {
-<a class="jxr_linenumber" name="169" href="#169">169</a>     <a href="../../../../org/apache/helix/PropertyKey.html">Builder</a> propertyKeyBuilder = <strong class="jxr_keyword">new</strong> PropertyKey.Builder(cluster);
-<a class="jxr_linenumber" name="170" href="#170">170</a>     <a href="../../../../org/apache/helix/HelixDataAccessor.html">HelixDataAccessor</a> helixDataAccessor = admin.getHelixDataAccessor();
-<a class="jxr_linenumber" name="171" href="#171">171</a>     List&lt;LiveInstance&gt; liveInstances = helixDataAccessor
-<a class="jxr_linenumber" name="172" href="#172">172</a>         .getChildValues(propertyKeyBuilder.liveInstances());
-<a class="jxr_linenumber" name="173" href="#173">173</a>     refreshCache(liveInstances);
-<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>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> refreshCache(List&lt;LiveInstance&gt; liveInstances)
-<a class="jxr_linenumber" name="177" href="#177">177</a>   {
-<a class="jxr_linenumber" name="178" href="#178">178</a>     List&lt;ServiceMetadata&gt; services = <strong class="jxr_keyword">new</strong> ArrayList&lt;ServiceMetadata&gt;();
-<a class="jxr_linenumber" name="179" href="#179">179</a>     <strong class="jxr_keyword">for</strong> (LiveInstance liveInstance : liveInstances)
-<a class="jxr_linenumber" name="180" href="#180">180</a>     {
-<a class="jxr_linenumber" name="181" href="#181">181</a>       <a href="../../../../org/apache/helix/servicediscovery/ServiceMetadata.html">ServiceMetadata</a> metadata = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/servicediscovery/ServiceMetadata.html">ServiceMetadata</a>();
-<a class="jxr_linenumber" name="182" href="#182">182</a>       <a href="../../../../org/apache/helix/ZNRecord.html">ZNRecord</a> rec = liveInstance.getRecord();
-<a class="jxr_linenumber" name="183" href="#183">183</a>       metadata.setPort(Integer.parseInt(rec.getSimpleField(<span class="jxr_string">"PORT"</span>)));
-<a class="jxr_linenumber" name="184" href="#184">184</a>       metadata.setHost(rec.getSimpleField(<span class="jxr_string">"HOST"</span>));
-<a class="jxr_linenumber" name="185" href="#185">185</a>       metadata.setServiceName(rec.getSimpleField(<span class="jxr_string">"SERVICE_NAME"</span>));
-<a class="jxr_linenumber" name="186" href="#186">186</a>       services.add(metadata);
-<a class="jxr_linenumber" name="187" href="#187">187</a>     }
-<a class="jxr_linenumber" name="188" href="#188">188</a>     <em class="jxr_comment">//protect against multiple threads updating this</em>
-<a class="jxr_linenumber" name="189" href="#189">189</a>     <strong class="jxr_keyword">synchronized</strong> (<strong class="jxr_keyword">this</strong>)
-<a class="jxr_linenumber" name="190" href="#190">190</a>     {
-<a class="jxr_linenumber" name="191" href="#191">191</a>       cache = services;
-<a class="jxr_linenumber" name="192" href="#192">192</a>     }
-<a class="jxr_linenumber" name="193" href="#193">193</a>   }
-<a class="jxr_linenumber" name="194" href="#194">194</a> 
-<a class="jxr_linenumber" name="195" href="#195">195</a>   <strong class="jxr_keyword">public</strong> List&lt;ServiceMetadata&gt; findAllServices()
-<a class="jxr_linenumber" name="196" href="#196">196</a>   {
-<a class="jxr_linenumber" name="197" href="#197">197</a>     <strong class="jxr_keyword">if</strong> (mode == Mode.NONE)
+<a class="jxr_linenumber" name="117" href="#117">117</a>     timer = <strong class="jxr_keyword">new</strong> Timer();
+<a class="jxr_linenumber" name="118" href="#118">118</a>     timer.scheduleAtFixedRate(timertask, DEFAULT_POLL_INTERVAL, DEFAULT_POLL_INTERVAL);
+<a class="jxr_linenumber" name="119" href="#119">119</a>   }
+<a class="jxr_linenumber" name="120" href="#120">120</a> 
+<a class="jxr_linenumber" name="121" href="#121">121</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> setupWatcher() <strong class="jxr_keyword">throws</strong> Exception
+<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>     <a href="../../../../org/apache/helix/LiveInstanceChangeListener.html">LiveInstanceChangeListener</a> listener = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/LiveInstanceChangeListener.html">LiveInstanceChangeListener</a>()
+<a class="jxr_linenumber" name="125" href="#125">125</a>     {
+<a class="jxr_linenumber" name="126" href="#126">126</a>       @Override
+<a class="jxr_linenumber" name="127" href="#127">127</a>       <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> onLiveInstanceChange(List&lt;LiveInstance&gt; liveInstances,
+<a class="jxr_linenumber" name="128" href="#128">128</a>           <a href="../../../../org/apache/helix/NotificationContext.html">NotificationContext</a> changeContext)
+<a class="jxr_linenumber" name="129" href="#129">129</a>       {
+<a class="jxr_linenumber" name="130" href="#130">130</a>         <strong class="jxr_keyword">if</strong>(changeContext.getType() != NotificationContext.Type.FINALIZE){
+<a class="jxr_linenumber" name="131" href="#131">131</a>           refreshCache();
+<a class="jxr_linenumber" name="132" href="#132">132</a>         }
+<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>     admin.addLiveInstanceChangeListener(listener);
+<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">public</strong> <strong class="jxr_keyword">boolean</strong> stop()
+<a class="jxr_linenumber" name="139" href="#139">139</a>   {
+<a class="jxr_linenumber" name="140" href="#140">140</a>     <strong class="jxr_keyword">if</strong> (admin != <strong class="jxr_keyword">null</strong> &amp;&amp; admin.isConnected())
+<a class="jxr_linenumber" name="141" href="#141">141</a>     {
+<a class="jxr_linenumber" name="142" href="#142">142</a>       admin.disconnect();
+<a class="jxr_linenumber" name="143" href="#143">143</a>     }
+<a class="jxr_linenumber" name="144" href="#144">144</a>     <strong class="jxr_keyword">if</strong> (timer != <strong class="jxr_keyword">null</strong>)
+<a class="jxr_linenumber" name="145" href="#145">145</a>     {
+<a class="jxr_linenumber" name="146" href="#146">146</a>       timer.cancel();
+<a class="jxr_linenumber" name="147" href="#147">147</a>     }
+<a class="jxr_linenumber" name="148" href="#148">148</a>     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
+<a class="jxr_linenumber" name="149" href="#149">149</a>   }
+<a class="jxr_linenumber" name="150" href="#150">150</a> 
+<a class="jxr_linenumber" name="151" href="#151">151</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> deregister(<strong class="jxr_keyword">final</strong> String serviceId)
+<a class="jxr_linenumber" name="152" href="#152">152</a>   {
+<a class="jxr_linenumber" name="153" href="#153">153</a>     <a href="../../../../org/apache/helix/HelixManager.html">HelixManager</a> helixManager = serviceMap.get(serviceId);
+<a class="jxr_linenumber" name="154" href="#154">154</a>     <strong class="jxr_keyword">if</strong> (helixManager != <strong class="jxr_keyword">null</strong> &amp;&amp; helixManager.isConnected())
+<a class="jxr_linenumber" name="155" href="#155">155</a>     {
+<a class="jxr_linenumber" name="156" href="#156">156</a>       helixManager.disconnect();
+<a class="jxr_linenumber" name="157" href="#157">157</a>     }
+<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">boolean</strong> register(<strong class="jxr_keyword">final</strong> String serviceId,
+<a class="jxr_linenumber" name="161" href="#161">161</a>       <strong class="jxr_keyword">final</strong> <a href="../../../../org/apache/helix/servicediscovery/ServiceMetadata.html">ServiceMetadata</a> serviceMetadata) <strong class="jxr_keyword">throws</strong> Exception
+<a class="jxr_linenumber" name="162" href="#162">162</a>   {
+<a class="jxr_linenumber" name="163" href="#163">163</a>     <a href="../../../../org/apache/helix/HelixManager.html">HelixManager</a> helixManager = HelixManagerFactory.getZKHelixManager(cluster,
+<a class="jxr_linenumber" name="164" href="#164">164</a>         serviceId, InstanceType.PARTICIPANT, zkAddress);
+<a class="jxr_linenumber" name="165" href="#165">165</a>     <a href="../../../../org/apache/helix/LiveInstanceInfoProvider.html">LiveInstanceInfoProvider</a> liveInstanceInfoProvider = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/LiveInstanceInfoProvider.html">LiveInstanceInfoProvider</a>()
+<a class="jxr_linenumber" name="166" href="#166">166</a>     {
+<a class="jxr_linenumber" name="167" href="#167">167</a>       @Override
+<a class="jxr_linenumber" name="168" href="#168">168</a>       <strong class="jxr_keyword">public</strong> <a href="../../../../org/apache/helix/ZNRecord.html">ZNRecord</a> getAdditionalLiveInstanceInfo()
+<a class="jxr_linenumber" name="169" href="#169">169</a>       {
+<a class="jxr_linenumber" name="170" href="#170">170</a>         <em class="jxr_comment">// serialize serviceMetadata to ZNRecord</em>
+<a class="jxr_linenumber" name="171" href="#171">171</a>         <a href="../../../../org/apache/helix/ZNRecord.html">ZNRecord</a> rec = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/ZNRecord.html">ZNRecord</a>(serviceId);
+<a class="jxr_linenumber" name="172" href="#172">172</a>         rec.setSimpleField(<span class="jxr_string">"HOST"</span>, serviceMetadata.getHost());
+<a class="jxr_linenumber" name="173" href="#173">173</a>         rec.setSimpleField(<span class="jxr_string">"PORT"</span>, String.valueOf(serviceMetadata.getPort()));
+<a class="jxr_linenumber" name="174" href="#174">174</a>         rec.setSimpleField(<span class="jxr_string">"SERVICE_NAME"</span>, serviceMetadata.getServiceName());
+<a class="jxr_linenumber" name="175" href="#175">175</a>         <strong class="jxr_keyword">return</strong> rec;
+<a class="jxr_linenumber" name="176" href="#176">176</a>       }
+<a class="jxr_linenumber" name="177" href="#177">177</a>     };
+<a class="jxr_linenumber" name="178" href="#178">178</a>     helixManager.setLiveInstanceInfoProvider(liveInstanceInfoProvider);
+<a class="jxr_linenumber" name="179" href="#179">179</a>     helixManager.connect();
+<a class="jxr_linenumber" name="180" href="#180">180</a>     serviceMap.put(serviceId, helixManager);
+<a class="jxr_linenumber" name="181" href="#181">181</a>     refreshCache();
+<a class="jxr_linenumber" name="182" href="#182">182</a>     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
+<a class="jxr_linenumber" name="183" href="#183">183</a>   }
+<a class="jxr_linenumber" name="184" href="#184">184</a> 
+<a class="jxr_linenumber" name="185" href="#185">185</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> refreshCache()
+<a class="jxr_linenumber" name="186" href="#186">186</a>   {
+<a class="jxr_linenumber" name="187" href="#187">187</a>     <a href="../../../../org/apache/helix/PropertyKey.html">Builder</a> propertyKeyBuilder = <strong class="jxr_keyword">new</strong> PropertyKey.Builder(cluster);
+<a class="jxr_linenumber" name="188" href="#188">188</a>     <a href="../../../../org/apache/helix/HelixDataAccessor.html">HelixDataAccessor</a> helixDataAccessor = admin.getHelixDataAccessor();
+<a class="jxr_linenumber" name="189" href="#189">189</a>     List&lt;LiveInstance&gt; liveInstances = helixDataAccessor
+<a class="jxr_linenumber" name="190" href="#190">190</a>         .getChildValues(propertyKeyBuilder.liveInstances());
+<a class="jxr_linenumber" name="191" href="#191">191</a>     refreshCache(liveInstances);
+<a class="jxr_linenumber" name="192" href="#192">192</a>   }
+<a class="jxr_linenumber" name="193" href="#193">193</a> 
+<a class="jxr_linenumber" name="194" href="#194">194</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> refreshCache(List&lt;LiveInstance&gt; liveInstances)
+<a class="jxr_linenumber" name="195" href="#195">195</a>   {
+<a class="jxr_linenumber" name="196" href="#196">196</a>     List&lt;ServiceMetadata&gt; services = <strong class="jxr_keyword">new</strong> ArrayList&lt;ServiceMetadata&gt;();
+<a class="jxr_linenumber" name="197" href="#197">197</a>     <strong class="jxr_keyword">for</strong> (LiveInstance liveInstance : liveInstances)
 <a class="jxr_linenumber" name="198" href="#198">198</a>     {
-<a class="jxr_linenumber" name="199" href="#199">199</a>       refreshCache();
-<a class="jxr_linenumber" name="200" href="#200">200</a>     }
-<a class="jxr_linenumber" name="201" href="#201">201</a>     <strong class="jxr_keyword">return</strong> cache;
-<a class="jxr_linenumber" name="202" href="#202">202</a>   }
-<a class="jxr_linenumber" name="203" href="#203">203</a> }
+<a class="jxr_linenumber" name="199" href="#199">199</a>       <a href="../../../../org/apache/helix/servicediscovery/ServiceMetadata.html">ServiceMetadata</a> metadata = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/servicediscovery/ServiceMetadata.html">ServiceMetadata</a>();
+<a class="jxr_linenumber" name="200" href="#200">200</a>       <a href="../../../../org/apache/helix/ZNRecord.html">ZNRecord</a> rec = liveInstance.getRecord();
+<a class="jxr_linenumber" name="201" href="#201">201</a>       metadata.setPort(Integer.parseInt(rec.getSimpleField(<span class="jxr_string">"PORT"</span>)));
+<a class="jxr_linenumber" name="202" href="#202">202</a>       metadata.setHost(rec.getSimpleField(<span class="jxr_string">"HOST"</span>));
+<a class="jxr_linenumber" name="203" href="#203">203</a>       metadata.setServiceName(rec.getSimpleField(<span class="jxr_string">"SERVICE_NAME"</span>));
+<a class="jxr_linenumber" name="204" href="#204">204</a>       services.add(metadata);
+<a class="jxr_linenumber" name="205" href="#205">205</a>     }
+<a class="jxr_linenumber" name="206" href="#206">206</a>     <em class="jxr_comment">//protect against multiple threads updating this</em>
+<a class="jxr_linenumber" name="207" href="#207">207</a>     <strong class="jxr_keyword">synchronized</strong> (<strong class="jxr_keyword">this</strong>)
+<a class="jxr_linenumber" name="208" href="#208">208</a>     {
+<a class="jxr_linenumber" name="209" href="#209">209</a>       cache = services;
+<a class="jxr_linenumber" name="210" href="#210">210</a>     }
+<a class="jxr_linenumber" name="211" href="#211">211</a>   }
+<a class="jxr_linenumber" name="212" href="#212">212</a> 
+<a class="jxr_linenumber" name="213" href="#213">213</a>   <strong class="jxr_keyword">public</strong> List&lt;ServiceMetadata&gt; findAllServices()
+<a class="jxr_linenumber" name="214" href="#214">214</a>   {
+<a class="jxr_linenumber" name="215" href="#215">215</a>     <strong class="jxr_keyword">if</strong> (mode == Mode.NONE)
+<a class="jxr_linenumber" name="216" href="#216">216</a>     {
+<a class="jxr_linenumber" name="217" href="#217">217</a>       refreshCache();
+<a class="jxr_linenumber" name="218" href="#218">218</a>     }
+<a class="jxr_linenumber" name="219" href="#219">219</a>     <strong class="jxr_keyword">return</strong> cache;
+<a class="jxr_linenumber" name="220" href="#220">220</a>   }
+<a class="jxr_linenumber" name="221" href="#221">221</a> }
 </pre>
 <hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body>
 </html>

Modified: incubator/helix/site-content/xref/org/apache/helix/servicediscovery/ServiceDiscoveryDemo.html
URL: http://svn.apache.org/viewvc/incubator/helix/site-content/xref/org/apache/helix/servicediscovery/ServiceDiscoveryDemo.html?rev=1479756&r1=1479755&r2=1479756&view=diff
==============================================================================
--- incubator/helix/site-content/xref/org/apache/helix/servicediscovery/ServiceDiscoveryDemo.html (original)
+++ incubator/helix/site-content/xref/org/apache/helix/servicediscovery/ServiceDiscoveryDemo.html Tue May  7 03:10:53 2013
@@ -10,119 +10,138 @@
 
 <a class="jxr_linenumber" name="1" href="#1">1</a>   <strong class="jxr_keyword">package</strong> org.apache.helix.servicediscovery;
 <a class="jxr_linenumber" name="2" href="#2">2</a>   
-<a class="jxr_linenumber" name="3" href="#3">3</a>   <strong class="jxr_keyword">import</strong> java.net.InetAddress;
-<a class="jxr_linenumber" name="4" href="#4">4</a>   <strong class="jxr_keyword">import</strong> java.net.UnknownHostException;
-<a class="jxr_linenumber" name="5" href="#5">5</a>   <strong class="jxr_keyword">import</strong> java.util.ArrayList;
-<a class="jxr_linenumber" name="6" href="#6">6</a>   <strong class="jxr_keyword">import</strong> java.util.List;
-<a class="jxr_linenumber" name="7" href="#7">7</a>   
-<a class="jxr_linenumber" name="8" href="#8">8</a>   <strong class="jxr_keyword">import</strong> org.apache.helix.servicediscovery.ServiceDiscovery.Mode;
-<a class="jxr_linenumber" name="9" href="#9">9</a>   
-<a class="jxr_linenumber" name="10" href="#10">10</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscoveryDemo.html">ServiceDiscoveryDemo</a>
-<a class="jxr_linenumber" name="11" href="#11">11</a>  {
-<a class="jxr_linenumber" name="12" href="#12">12</a>    <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> main(String[] args) <strong class="jxr_keyword">throws</strong> Exception
-<a class="jxr_linenumber" name="13" href="#13">13</a>    {
-<a class="jxr_linenumber" name="14" href="#14">14</a>  
-<a class="jxr_linenumber" name="15" href="#15">15</a>      String clusterName = <span class="jxr_string">"service-discovery-demo"</span>;
-<a class="jxr_linenumber" name="16" href="#16">16</a>      String zkAddress = <span class="jxr_string">"localhost:2199"</span>;
-<a class="jxr_linenumber" name="17" href="#17">17</a>      String serviceName = <span class="jxr_string">"myServiceName"</span>;
-<a class="jxr_linenumber" name="18" href="#18">18</a>      <strong class="jxr_keyword">int</strong> numServices = 5;
-<a class="jxr_linenumber" name="19" href="#19">19</a>      
-<a class="jxr_linenumber" name="20" href="#20">20</a>      <em class="jxr_comment">//registration + zk watch</em>
-<a class="jxr_linenumber" name="21" href="#21">21</a>      demo(clusterName, zkAddress, serviceName, numServices, Mode.WATCH);
-<a class="jxr_linenumber" name="22" href="#22">22</a>      <em class="jxr_comment">//registration + periodic poll </em>
-<a class="jxr_linenumber" name="23" href="#23">23</a>      demo(clusterName, zkAddress, serviceName, numServices, Mode.POLL);
-<a class="jxr_linenumber" name="24" href="#24">24</a>      <em class="jxr_comment">//only registration + ondemand </em>
-<a class="jxr_linenumber" name="25" href="#25">25</a>      demo(clusterName, zkAddress, serviceName, numServices, Mode.NONE);
+<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment">/*</em>
+<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one</em>
+<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * or more contributor license agreements.  See the NOTICE file</em>
+<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * distributed with this work for additional information</em>
+<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> * regarding copyright ownership.  The ASF licenses this file</em>
+<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> * to you under the Apache License, Version 2.0 (the</em>
+<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> * "License"); you may not use this file except in compliance</em>
+<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * with the License.  You may obtain a copy of the License at</em>
+<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> *</em>
+<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> *   <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
+<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> *</em>
+<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing,</em>
+<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> * software distributed under the License is distributed on an</em>
+<a class="jxr_linenumber" name="16" href="#16">16</a>  <em class="jxr_comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em>
+<a class="jxr_linenumber" name="17" href="#17">17</a>  <em class="jxr_comment"> * KIND, either express or implied.  See the License for the</em>
+<a class="jxr_linenumber" name="18" href="#18">18</a>  <em class="jxr_comment"> * specific language governing permissions and limitations</em>
+<a class="jxr_linenumber" name="19" href="#19">19</a>  <em class="jxr_comment"> * under the License.</em>
+<a class="jxr_linenumber" name="20" href="#20">20</a>  <em class="jxr_comment"> */</em>
+<a class="jxr_linenumber" name="21" href="#21">21</a>  
+<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> java.net.InetAddress;
+<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> java.net.UnknownHostException;
+<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> java.util.ArrayList;
+<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> java.util.List;
 <a class="jxr_linenumber" name="26" href="#26">26</a>  
-<a class="jxr_linenumber" name="27" href="#27">27</a>    }
+<a class="jxr_linenumber" name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> org.apache.helix.servicediscovery.ServiceDiscovery.Mode;
 <a class="jxr_linenumber" name="28" href="#28">28</a>  
-<a class="jxr_linenumber" name="29" href="#29">29</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> demo(String clusterName, String zkAddress,
-<a class="jxr_linenumber" name="30" href="#30">30</a>        String serviceName, <strong class="jxr_keyword">int</strong> numServices, <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">Mode</a> mode) <strong class="jxr_keyword">throws</strong> Exception,
-<a class="jxr_linenumber" name="31" href="#31">31</a>        UnknownHostException
+<a class="jxr_linenumber" name="29" href="#29">29</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscoveryDemo.html">ServiceDiscoveryDemo</a>
+<a class="jxr_linenumber" name="30" href="#30">30</a>  {
+<a class="jxr_linenumber" name="31" href="#31">31</a>    <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> main(String[] args) <strong class="jxr_keyword">throws</strong> Exception
 <a class="jxr_linenumber" name="32" href="#32">32</a>    {
-<a class="jxr_linenumber" name="33" href="#33">33</a>      System.out.println(<span class="jxr_string">"START:Service discovery demo mode:"</span>+ mode);
-<a class="jxr_linenumber" name="34" href="#34">34</a>      <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">ServiceDiscovery</a> serviceDiscovery = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">ServiceDiscovery</a>(zkAddress,
-<a class="jxr_linenumber" name="35" href="#35">35</a>          clusterName, mode);
-<a class="jxr_linenumber" name="36" href="#36">36</a>      serviceDiscovery.start();
-<a class="jxr_linenumber" name="37" href="#37">37</a>      <strong class="jxr_keyword">int</strong> startPort = 12000;
-<a class="jxr_linenumber" name="38" href="#38">38</a>      List&lt;MyService&gt; serviceList = <strong class="jxr_keyword">new</strong> ArrayList&lt;MyService&gt;();
-<a class="jxr_linenumber" name="39" href="#39">39</a>      System.out.println(<span class="jxr_string">"\tRegistering service"</span>);
-<a class="jxr_linenumber" name="40" href="#40">40</a>      <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; numServices; i++)
-<a class="jxr_linenumber" name="41" href="#41">41</a>      {
-<a class="jxr_linenumber" name="42" href="#42">42</a>        String host = InetAddress.getLocalHost().getHostName();
-<a class="jxr_linenumber" name="43" href="#43">43</a>        <strong class="jxr_keyword">int</strong> port = startPort + i;
-<a class="jxr_linenumber" name="44" href="#44">44</a>        String serviceId = host + <span class="jxr_string">"_"</span> + port;
-<a class="jxr_linenumber" name="45" href="#45">45</a>        <a href="../../../../org/apache/helix/servicediscovery/ServiceMetadata.html">ServiceMetadata</a> metadata = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/servicediscovery/ServiceMetadata.html">ServiceMetadata</a>();
-<a class="jxr_linenumber" name="46" href="#46">46</a>        metadata.setHost(host);
-<a class="jxr_linenumber" name="47" href="#47">47</a>        metadata.setPort(port);
-<a class="jxr_linenumber" name="48" href="#48">48</a>        metadata.setServiceName(serviceName);
-<a class="jxr_linenumber" name="49" href="#49">49</a>        <a href="../../../../org/apache/helix/servicediscovery/MyService.html">MyService</a> service = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/servicediscovery/MyService.html">MyService</a>(serviceId, metadata, serviceDiscovery);
-<a class="jxr_linenumber" name="50" href="#50">50</a>        service.start();
-<a class="jxr_linenumber" name="51" href="#51">51</a>        serviceList.add(service);
-<a class="jxr_linenumber" name="52" href="#52">52</a>        System.out.println(<span class="jxr_string">"\t\t"</span>+serviceId);
-<a class="jxr_linenumber" name="53" href="#53">53</a>      }
-<a class="jxr_linenumber" name="54" href="#54">54</a>      listAvailableServices(serviceDiscovery);
-<a class="jxr_linenumber" name="55" href="#55">55</a>      stopAndStartServices(serviceDiscovery, serviceList, mode);
-<a class="jxr_linenumber" name="56" href="#56">56</a>  
-<a class="jxr_linenumber" name="57" href="#57">57</a>      <strong class="jxr_keyword">for</strong> (MyService service : serviceList)
-<a class="jxr_linenumber" name="58" href="#58">58</a>      {
-<a class="jxr_linenumber" name="59" href="#59">59</a>        serviceDiscovery.deregister(service.getServiceId());
-<a class="jxr_linenumber" name="60" href="#60">60</a>      }
-<a class="jxr_linenumber" name="61" href="#61">61</a>      serviceDiscovery.stop();
-<a class="jxr_linenumber" name="62" href="#62">62</a>      System.out.println(<span class="jxr_string">"END:Service discovery demo mode:"</span>+ mode);
-<a class="jxr_linenumber" name="63" href="#63">63</a>      System.out.println(<span class="jxr_string">"============================================="</span>);
-<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>    <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="67" href="#67">67</a>  <em class="jxr_javadoccomment">   * Randomly stop and start some services, list all the available services.</em>
-<a class="jxr_linenumber" name="68" href="#68">68</a>  <em class="jxr_javadoccomment">   * This demonstrates that the list is dynamically updated when services</em>
-<a class="jxr_linenumber" name="69" href="#69">69</a>  <em class="jxr_javadoccomment">   * starts/stops</em>
-<a class="jxr_linenumber" name="70" href="#70">70</a>  <em class="jxr_javadoccomment">   * </em>
-<a class="jxr_linenumber" name="71" href="#71">71</a>  <em class="jxr_javadoccomment">   * @param serviceDiscovery</em>
-<a class="jxr_linenumber" name="72" href="#72">72</a>  <em class="jxr_javadoccomment">   * @param serviceList</em>
-<a class="jxr_linenumber" name="73" href="#73">73</a>  <em class="jxr_javadoccomment">   * @param mode</em>
-<a class="jxr_linenumber" name="74" href="#74">74</a>  <em class="jxr_javadoccomment">   * @throws Exception</em>
-<a class="jxr_linenumber" name="75" href="#75">75</a>  <em class="jxr_javadoccomment">   */</em>
-<a class="jxr_linenumber" name="76" href="#76">76</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> stopAndStartServices(<a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">ServiceDiscovery</a> serviceDiscovery,
-<a class="jxr_linenumber" name="77" href="#77">77</a>        List&lt;MyService&gt; serviceList, <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">Mode</a> mode) <strong class="jxr_keyword">throws</strong> Exception
-<a class="jxr_linenumber" name="78" href="#78">78</a>    {
-<a class="jxr_linenumber" name="79" href="#79">79</a>      <em class="jxr_comment">// randomly select some services stop</em>
-<a class="jxr_linenumber" name="80" href="#80">80</a>      <strong class="jxr_keyword">int</strong> index = ((<strong class="jxr_keyword">int</strong>) (Math.random() * 1000)) % serviceList.size();
-<a class="jxr_linenumber" name="81" href="#81">81</a>      <a href="../../../../org/apache/helix/servicediscovery/MyService.html">MyService</a> service = serviceList.get(index);
-<a class="jxr_linenumber" name="82" href="#82">82</a>      String serviceId = service.getServiceId();
-<a class="jxr_linenumber" name="83" href="#83">83</a>      System.out.println(<span class="jxr_string">"\tDeregistering service:\n\t\t"</span> + serviceId);
-<a class="jxr_linenumber" name="84" href="#84">84</a>      serviceDiscovery.deregister(serviceId);
-<a class="jxr_linenumber" name="85" href="#85">85</a>      <strong class="jxr_keyword">switch</strong> (mode)
-<a class="jxr_linenumber" name="86" href="#86">86</a>      {
-<a class="jxr_linenumber" name="87" href="#87">87</a>      <strong class="jxr_keyword">case</strong> WATCH:
-<a class="jxr_linenumber" name="88" href="#88">88</a>        Thread.sleep(100);<em class="jxr_comment">// callback should be immediate</em>
-<a class="jxr_linenumber" name="89" href="#89">89</a>        <strong class="jxr_keyword">break</strong>;
-<a class="jxr_linenumber" name="90" href="#90">90</a>      <strong class="jxr_keyword">case</strong> POLL:
-<a class="jxr_linenumber" name="91" href="#91">91</a>        System.out.println(<span class="jxr_string">"\tSleeping for poll interval:"</span> + ServiceDiscovery.DEFAULT_POLL_INTERVAL);
-<a class="jxr_linenumber" name="92" href="#92">92</a>        Thread.sleep(ServiceDiscovery.DEFAULT_POLL_INTERVAL + 1000);
-<a class="jxr_linenumber" name="93" href="#93">93</a>        <strong class="jxr_keyword">break</strong>;
-<a class="jxr_linenumber" name="94" href="#94">94</a>      <strong class="jxr_keyword">case</strong> NONE: <em class="jxr_comment">// no need to wait, it reads on demand</em>
-<a class="jxr_linenumber" name="95" href="#95">95</a>      <strong class="jxr_keyword">default</strong>:
-<a class="jxr_linenumber" name="96" href="#96">96</a>        <strong class="jxr_keyword">break</strong>;
-<a class="jxr_linenumber" name="97" href="#97">97</a>      }
-<a class="jxr_linenumber" name="98" href="#98">98</a>      listAvailableServices(serviceDiscovery);
-<a class="jxr_linenumber" name="99" href="#99">99</a>      Thread.sleep(100);
-<a class="jxr_linenumber" name="100" href="#100">100</a>     System.out.println(<span class="jxr_string">"\tRegistering service:"</span> + serviceId);
-<a class="jxr_linenumber" name="101" href="#101">101</a>     serviceDiscovery.register(serviceId, service.getMetadata());
-<a class="jxr_linenumber" name="102" href="#102">102</a>   }
-<a class="jxr_linenumber" name="103" href="#103">103</a> 
-<a class="jxr_linenumber" name="104" href="#104">104</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> listAvailableServices(<a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">ServiceDiscovery</a> serviceDiscovery)
-<a class="jxr_linenumber" name="105" href="#105">105</a>   {
-<a class="jxr_linenumber" name="106" href="#106">106</a>     List&lt;ServiceMetadata&gt; findAllServices = serviceDiscovery.findAllServices();
-<a class="jxr_linenumber" name="107" href="#107">107</a>     System.out.println(<span class="jxr_string">"\tSERVICES AVAILABLE"</span>);
-<a class="jxr_linenumber" name="108" href="#108">108</a>     System.out.printf(<span class="jxr_string">"\t\t%s \t%s \t\t\t%s\n"</span>, <span class="jxr_string">"SERVICENAME"</span>, <span class="jxr_string">"HOST"</span>, <span class="jxr_string">"PORT"</span>);
-<a class="jxr_linenumber" name="109" href="#109">109</a>     <strong class="jxr_keyword">for</strong> (ServiceMetadata serviceMetadata : findAllServices)
-<a class="jxr_linenumber" name="110" href="#110">110</a>     {
-<a class="jxr_linenumber" name="111" href="#111">111</a>       System.out.printf(<span class="jxr_string">"\t\t%s \t%s \t\t%s\n"</span>, serviceMetadata.getServiceName(),
-<a class="jxr_linenumber" name="112" href="#112">112</a>           serviceMetadata.getHost(), serviceMetadata.getPort());
-<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> }
+<a class="jxr_linenumber" name="33" href="#33">33</a>  
+<a class="jxr_linenumber" name="34" href="#34">34</a>      String clusterName = <span class="jxr_string">"service-discovery-demo"</span>;
+<a class="jxr_linenumber" name="35" href="#35">35</a>      String zkAddress = <span class="jxr_string">"localhost:2199"</span>;
+<a class="jxr_linenumber" name="36" href="#36">36</a>      String serviceName = <span class="jxr_string">"myServiceName"</span>;
+<a class="jxr_linenumber" name="37" href="#37">37</a>      <strong class="jxr_keyword">int</strong> numServices = 5;
+<a class="jxr_linenumber" name="38" href="#38">38</a>      
+<a class="jxr_linenumber" name="39" href="#39">39</a>      <em class="jxr_comment">//registration + zk watch</em>
+<a class="jxr_linenumber" name="40" href="#40">40</a>      demo(clusterName, zkAddress, serviceName, numServices, Mode.WATCH);
+<a class="jxr_linenumber" name="41" href="#41">41</a>      <em class="jxr_comment">//registration + periodic poll </em>
+<a class="jxr_linenumber" name="42" href="#42">42</a>      demo(clusterName, zkAddress, serviceName, numServices, Mode.POLL);
+<a class="jxr_linenumber" name="43" href="#43">43</a>      <em class="jxr_comment">//only registration + ondemand </em>
+<a class="jxr_linenumber" name="44" href="#44">44</a>      demo(clusterName, zkAddress, serviceName, numServices, Mode.NONE);
+<a class="jxr_linenumber" name="45" href="#45">45</a>  
+<a class="jxr_linenumber" name="46" href="#46">46</a>    }
+<a class="jxr_linenumber" name="47" href="#47">47</a>  
+<a class="jxr_linenumber" name="48" href="#48">48</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> demo(String clusterName, String zkAddress,
+<a class="jxr_linenumber" name="49" href="#49">49</a>        String serviceName, <strong class="jxr_keyword">int</strong> numServices, <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">Mode</a> mode) <strong class="jxr_keyword">throws</strong> Exception,
+<a class="jxr_linenumber" name="50" href="#50">50</a>        UnknownHostException
+<a class="jxr_linenumber" name="51" href="#51">51</a>    {
+<a class="jxr_linenumber" name="52" href="#52">52</a>      System.out.println(<span class="jxr_string">"START:Service discovery demo mode:"</span>+ mode);
+<a class="jxr_linenumber" name="53" href="#53">53</a>      <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">ServiceDiscovery</a> serviceDiscovery = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">ServiceDiscovery</a>(zkAddress,
+<a class="jxr_linenumber" name="54" href="#54">54</a>          clusterName, mode);
+<a class="jxr_linenumber" name="55" href="#55">55</a>      serviceDiscovery.start();
+<a class="jxr_linenumber" name="56" href="#56">56</a>      <strong class="jxr_keyword">int</strong> startPort = 12000;
+<a class="jxr_linenumber" name="57" href="#57">57</a>      List&lt;MyService&gt; serviceList = <strong class="jxr_keyword">new</strong> ArrayList&lt;MyService&gt;();
+<a class="jxr_linenumber" name="58" href="#58">58</a>      System.out.println(<span class="jxr_string">"\tRegistering service"</span>);
+<a class="jxr_linenumber" name="59" href="#59">59</a>      <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; numServices; i++)
+<a class="jxr_linenumber" name="60" href="#60">60</a>      {
+<a class="jxr_linenumber" name="61" href="#61">61</a>        String host = InetAddress.getLocalHost().getHostName();
+<a class="jxr_linenumber" name="62" href="#62">62</a>        <strong class="jxr_keyword">int</strong> port = startPort + i;
+<a class="jxr_linenumber" name="63" href="#63">63</a>        String serviceId = host + <span class="jxr_string">"_"</span> + port;
+<a class="jxr_linenumber" name="64" href="#64">64</a>        <a href="../../../../org/apache/helix/servicediscovery/ServiceMetadata.html">ServiceMetadata</a> metadata = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/servicediscovery/ServiceMetadata.html">ServiceMetadata</a>();
+<a class="jxr_linenumber" name="65" href="#65">65</a>        metadata.setHost(host);
+<a class="jxr_linenumber" name="66" href="#66">66</a>        metadata.setPort(port);
+<a class="jxr_linenumber" name="67" href="#67">67</a>        metadata.setServiceName(serviceName);
+<a class="jxr_linenumber" name="68" href="#68">68</a>        <a href="../../../../org/apache/helix/servicediscovery/MyService.html">MyService</a> service = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/servicediscovery/MyService.html">MyService</a>(serviceId, metadata, serviceDiscovery);
+<a class="jxr_linenumber" name="69" href="#69">69</a>        service.start();
+<a class="jxr_linenumber" name="70" href="#70">70</a>        serviceList.add(service);
+<a class="jxr_linenumber" name="71" href="#71">71</a>        System.out.println(<span class="jxr_string">"\t\t"</span>+serviceId);
+<a class="jxr_linenumber" name="72" href="#72">72</a>      }
+<a class="jxr_linenumber" name="73" href="#73">73</a>      listAvailableServices(serviceDiscovery);
+<a class="jxr_linenumber" name="74" href="#74">74</a>      stopAndStartServices(serviceDiscovery, serviceList, mode);
+<a class="jxr_linenumber" name="75" href="#75">75</a>  
+<a class="jxr_linenumber" name="76" href="#76">76</a>      <strong class="jxr_keyword">for</strong> (MyService service : serviceList)
+<a class="jxr_linenumber" name="77" href="#77">77</a>      {
+<a class="jxr_linenumber" name="78" href="#78">78</a>        serviceDiscovery.deregister(service.getServiceId());
+<a class="jxr_linenumber" name="79" href="#79">79</a>      }
+<a class="jxr_linenumber" name="80" href="#80">80</a>      serviceDiscovery.stop();
+<a class="jxr_linenumber" name="81" href="#81">81</a>      System.out.println(<span class="jxr_string">"END:Service discovery demo mode:"</span>+ mode);
+<a class="jxr_linenumber" name="82" href="#82">82</a>      System.out.println(<span class="jxr_string">"============================================="</span>);
+<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>    <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="86" href="#86">86</a>  <em class="jxr_javadoccomment">   * Randomly stop and start some services, list all the available services.</em>
+<a class="jxr_linenumber" name="87" href="#87">87</a>  <em class="jxr_javadoccomment">   * This demonstrates that the list is dynamically updated when services</em>
+<a class="jxr_linenumber" name="88" href="#88">88</a>  <em class="jxr_javadoccomment">   * starts/stops</em>
+<a class="jxr_linenumber" name="89" href="#89">89</a>  <em class="jxr_javadoccomment">   * </em>
+<a class="jxr_linenumber" name="90" href="#90">90</a>  <em class="jxr_javadoccomment">   * @param serviceDiscovery</em>
+<a class="jxr_linenumber" name="91" href="#91">91</a>  <em class="jxr_javadoccomment">   * @param serviceList</em>
+<a class="jxr_linenumber" name="92" href="#92">92</a>  <em class="jxr_javadoccomment">   * @param mode</em>
+<a class="jxr_linenumber" name="93" href="#93">93</a>  <em class="jxr_javadoccomment">   * @throws Exception</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>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> stopAndStartServices(<a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">ServiceDiscovery</a> serviceDiscovery,
+<a class="jxr_linenumber" name="96" href="#96">96</a>        List&lt;MyService&gt; serviceList, <a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">Mode</a> mode) <strong class="jxr_keyword">throws</strong> Exception
+<a class="jxr_linenumber" name="97" href="#97">97</a>    {
+<a class="jxr_linenumber" name="98" href="#98">98</a>      <em class="jxr_comment">// randomly select some services stop</em>
+<a class="jxr_linenumber" name="99" href="#99">99</a>      <strong class="jxr_keyword">int</strong> index = ((<strong class="jxr_keyword">int</strong>) (Math.random() * 1000)) % serviceList.size();
+<a class="jxr_linenumber" name="100" href="#100">100</a>     <a href="../../../../org/apache/helix/servicediscovery/MyService.html">MyService</a> service = serviceList.get(index);
+<a class="jxr_linenumber" name="101" href="#101">101</a>     String serviceId = service.getServiceId();
+<a class="jxr_linenumber" name="102" href="#102">102</a>     System.out.println(<span class="jxr_string">"\tDeregistering service:\n\t\t"</span> + serviceId);
+<a class="jxr_linenumber" name="103" href="#103">103</a>     serviceDiscovery.deregister(serviceId);
+<a class="jxr_linenumber" name="104" href="#104">104</a>     <strong class="jxr_keyword">switch</strong> (mode)
+<a class="jxr_linenumber" name="105" href="#105">105</a>     {
+<a class="jxr_linenumber" name="106" href="#106">106</a>     <strong class="jxr_keyword">case</strong> WATCH:
+<a class="jxr_linenumber" name="107" href="#107">107</a>       Thread.sleep(100);<em class="jxr_comment">// callback should be immediate</em>
+<a class="jxr_linenumber" name="108" href="#108">108</a>       <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="109" href="#109">109</a>     <strong class="jxr_keyword">case</strong> POLL:
+<a class="jxr_linenumber" name="110" href="#110">110</a>       System.out.println(<span class="jxr_string">"\tSleeping for poll interval:"</span> + ServiceDiscovery.DEFAULT_POLL_INTERVAL);
+<a class="jxr_linenumber" name="111" href="#111">111</a>       Thread.sleep(ServiceDiscovery.DEFAULT_POLL_INTERVAL + 1000);
+<a class="jxr_linenumber" name="112" href="#112">112</a>       <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="113" href="#113">113</a>     <strong class="jxr_keyword">case</strong> NONE: <em class="jxr_comment">// no need to wait, it reads on demand</em>
+<a class="jxr_linenumber" name="114" href="#114">114</a>     <strong class="jxr_keyword">default</strong>:
+<a class="jxr_linenumber" name="115" href="#115">115</a>       <strong class="jxr_keyword">break</strong>;
+<a class="jxr_linenumber" name="116" href="#116">116</a>     }
+<a class="jxr_linenumber" name="117" href="#117">117</a>     listAvailableServices(serviceDiscovery);
+<a class="jxr_linenumber" name="118" href="#118">118</a>     Thread.sleep(100);
+<a class="jxr_linenumber" name="119" href="#119">119</a>     System.out.println(<span class="jxr_string">"\tRegistering service:"</span> + serviceId);
+<a class="jxr_linenumber" name="120" href="#120">120</a>     serviceDiscovery.register(serviceId, service.getMetadata());
+<a class="jxr_linenumber" name="121" href="#121">121</a>   }
+<a class="jxr_linenumber" name="122" href="#122">122</a> 
+<a class="jxr_linenumber" name="123" href="#123">123</a>   <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> listAvailableServices(<a href="../../../../org/apache/helix/servicediscovery/ServiceDiscovery.html">ServiceDiscovery</a> serviceDiscovery)
+<a class="jxr_linenumber" name="124" href="#124">124</a>   {
+<a class="jxr_linenumber" name="125" href="#125">125</a>     List&lt;ServiceMetadata&gt; findAllServices = serviceDiscovery.findAllServices();
+<a class="jxr_linenumber" name="126" href="#126">126</a>     System.out.println(<span class="jxr_string">"\tSERVICES AVAILABLE"</span>);
+<a class="jxr_linenumber" name="127" href="#127">127</a>     System.out.printf(<span class="jxr_string">"\t\t%s \t%s \t\t\t%s\n"</span>, <span class="jxr_string">"SERVICENAME"</span>, <span class="jxr_string">"HOST"</span>, <span class="jxr_string">"PORT"</span>);
+<a class="jxr_linenumber" name="128" href="#128">128</a>     <strong class="jxr_keyword">for</strong> (ServiceMetadata serviceMetadata : findAllServices)
+<a class="jxr_linenumber" name="129" href="#129">129</a>     {
+<a class="jxr_linenumber" name="130" href="#130">130</a>       System.out.printf(<span class="jxr_string">"\t\t%s \t%s \t\t%s\n"</span>, serviceMetadata.getServiceName(),
+<a class="jxr_linenumber" name="131" href="#131">131</a>           serviceMetadata.getHost(), serviceMetadata.getPort());
+<a class="jxr_linenumber" name="132" href="#132">132</a>     }
+<a class="jxr_linenumber" name="133" href="#133">133</a>   }
+<a class="jxr_linenumber" name="134" href="#134">134</a> }
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