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Posted to commits@helix.apache.org by sl...@apache.org on 2013/05/09 00:02:11 UTC
svn commit: r1480483 [12/12] - in /incubator/helix/site-content: ./
apidocs/reference/ apidocs/reference/org/apache/helix/
apidocs/reference/org/apache/helix/messaging/handling/
apidocs/reference/org/apache/helix/model/ apidocs/reference/org/apache/hel...
Modified: incubator/helix/site-content/xref/org/apache/helix/taskexecution/TaskExecutionDemo.html
URL: http://svn.apache.org/viewvc/incubator/helix/site-content/xref/org/apache/helix/taskexecution/TaskExecutionDemo.html?rev=1480483&r1=1480482&r2=1480483&view=diff
==============================================================================
--- incubator/helix/site-content/xref/org/apache/helix/taskexecution/TaskExecutionDemo.html (original)
+++ incubator/helix/site-content/xref/org/apache/helix/taskexecution/TaskExecutionDemo.html Wed May 8 22:02:10 2013
@@ -42,139 +42,157 @@
<a class="jxr_linenumber" name="32" href="#32">32</a> <strong class="jxr_keyword">import</strong> org.apache.helix.controller.HelixControllerMain;
<a class="jxr_linenumber" name="33" href="#33">33</a> <strong class="jxr_keyword">import</strong> org.apache.helix.taskexecution.Dag.Node;
<a class="jxr_linenumber" name="34" href="#34">34</a> <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="35" href="#35">35</a> <em class="jxr_javadoccomment"> * </em>
-<a class="jxr_linenumber" name="36" href="#36">36</a> <em class="jxr_javadoccomment"> *</em>
-<a class="jxr_linenumber" name="37" href="#37">37</a> <em class="jxr_javadoccomment"> */</em>
-<a class="jxr_linenumber" name="38" href="#38">38</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/helix/taskexecution/TaskExecutionDemo.html">TaskExecutionDemo</a> {
-<a class="jxr_linenumber" name="39" href="#39">39</a>
-<a class="jxr_linenumber" name="40" href="#40">40</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="41" href="#41">41</a> <strong class="jxr_keyword">if</strong> (args.length != 3) {
-<a class="jxr_linenumber" name="42" href="#42">42</a> System.err
-<a class="jxr_linenumber" name="43" href="#43">43</a> .println(<span class="jxr_string">"USAGE: java TaskExecutionDemo zkPort redisHost redisPort"</span>);
-<a class="jxr_linenumber" name="44" href="#44">44</a> System.exit(1);
-<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> String redisHost = args[1];
-<a class="jxr_linenumber" name="48" href="#48">48</a> <strong class="jxr_keyword">int</strong> redisPort = Integer.parseInt(args[2]);
-<a class="jxr_linenumber" name="49" href="#49">49</a> ZkServer server = <strong class="jxr_keyword">null</strong>;
-<a class="jxr_linenumber" name="50" href="#50">50</a> <strong class="jxr_keyword">try</strong> {
-<a class="jxr_linenumber" name="51" href="#51">51</a> String baseDir = <span class="jxr_string">"/tmp/TaskExecutionDemo/"</span>;
-<a class="jxr_linenumber" name="52" href="#52">52</a> <strong class="jxr_keyword">final</strong> String dataDir = baseDir + <span class="jxr_string">"zk/dataDir"</span>;
-<a class="jxr_linenumber" name="53" href="#53">53</a> <strong class="jxr_keyword">final</strong> String logDir = baseDir + <span class="jxr_string">"/tmp/logDir"</span>;
-<a class="jxr_linenumber" name="54" href="#54">54</a> FileUtils.deleteDirectory(<strong class="jxr_keyword">new</strong> File(dataDir));
-<a class="jxr_linenumber" name="55" href="#55">55</a> FileUtils.deleteDirectory(<strong class="jxr_keyword">new</strong> File(logDir));
+<a class="jxr_linenumber" name="35" href="#35">35</a> <em class="jxr_javadoccomment"> * Demo for execution of task Dag using primitives provided by Helix. This demo sets up a Dag of tasks for</em>
+<a class="jxr_linenumber" name="36" href="#36">36</a> <em class="jxr_javadoccomment"> * providing analytics for impression and click events. Each node on the dag has an id and declares the desired parallelism and </em>
+<a class="jxr_linenumber" name="37" href="#37">37</a> <em class="jxr_javadoccomment"> * IDs of the nodes it depends on. When we submit this dag for execution using submitDag(){@link TaskCluster}, we create a Helix resource for </em>
+<a class="jxr_linenumber" name="38" href="#38">38</a> <em class="jxr_javadoccomment"> * each node with number of partitions based on desired parallelism. We use a "OnlineOffline" state model.</em>
+<a class="jxr_linenumber" name="39" href="#39">39</a> <em class="jxr_javadoccomment"> * The demo starts NUM_WORKERS workers. Each worker is given a {@link TaskFactory} and {@link TaskResultStore}. Each worker is assigned a bunch of task </em>
+<a class="jxr_linenumber" name="40" href="#40">40</a> <em class="jxr_javadoccomment"> * partitions by Helix and gets state transition messages for the task partitions it is assigned. When the worker gets a state transition message </em>
+<a class="jxr_linenumber" name="41" href="#41">41</a> <em class="jxr_javadoccomment"> * for a task partition, it first checks if all upstream dependencies are satisfied by making sure that corresponding partitions have transitioned to </em>
+<a class="jxr_linenumber" name="42" href="#42">42</a> <em class="jxr_javadoccomment"> * "Online" state. It then creates a Task object using TaskFactory based on resource name (since task IDs have been mapped to resource names)</em>
+<a class="jxr_linenumber" name="43" href="#43">43</a> <em class="jxr_javadoccomment"> * The demo has the following steps</em>
+<a class="jxr_linenumber" name="44" href="#44">44</a> <em class="jxr_javadoccomment"> * <OL></em>
+<a class="jxr_linenumber" name="45" href="#45">45</a> <em class="jxr_javadoccomment"> * <LI>Start zookeeper</LI></em>
+<a class="jxr_linenumber" name="46" href="#46">46</a> <em class="jxr_javadoccomment"> * <LI>Setup task cluster {@link TaskCluster}</LI></em>
+<a class="jxr_linenumber" name="47" href="#47">47</a> <em class="jxr_javadoccomment"> * <LI>Start Helix controller</LI></em>
+<a class="jxr_linenumber" name="48" href="#48">48</a> <em class="jxr_javadoccomment"> * <LI> Populate dummy impression and click data </LI></em>
+<a class="jxr_linenumber" name="49" href="#49">49</a> <em class="jxr_javadoccomment"> * <LI> Start workers </LI></em>
+<a class="jxr_linenumber" name="50" href="#50">50</a> <em class="jxr_javadoccomment"> * <LI> Submit dag </LI></em>
+<a class="jxr_linenumber" name="51" href="#51">51</a> <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="52" href="#52">52</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/apache/helix/taskexecution/TaskExecutionDemo.html">TaskExecutionDemo</a> {
+<a class="jxr_linenumber" name="53" href="#53">53</a>
+<a class="jxr_linenumber" name="54" href="#54">54</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> NUM_WORKERS = 10;
+<a class="jxr_linenumber" name="55" href="#55">55</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> NUM_IMP_EVENTS = 10000;
<a class="jxr_linenumber" name="56" href="#56">56</a>
-<a class="jxr_linenumber" name="57" href="#57">57</a> IDefaultNameSpace defaultNameSpace = <strong class="jxr_keyword">new</strong> IDefaultNameSpace() {
-<a class="jxr_linenumber" name="58" href="#58">58</a> @Override
-<a class="jxr_linenumber" name="59" href="#59">59</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> createDefaultNameSpace(ZkClient zkClient) {
-<a class="jxr_linenumber" name="60" href="#60">60</a>
-<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>
-<a class="jxr_linenumber" name="64" href="#64">64</a> <strong class="jxr_keyword">int</strong> zkPort = Integer.parseInt(args[0]);
-<a class="jxr_linenumber" name="65" href="#65">65</a> server = <strong class="jxr_keyword">new</strong> ZkServer(dataDir, logDir, defaultNameSpace, zkPort);
-<a class="jxr_linenumber" name="66" href="#66">66</a> server.start();
-<a class="jxr_linenumber" name="67" href="#67">67</a>
-<a class="jxr_linenumber" name="68" href="#68">68</a> String zkAddr = <span class="jxr_string">"localhost:"</span> + zkPort;
-<a class="jxr_linenumber" name="69" href="#69">69</a> String clusterName = TaskCluster.DEFAULT_CLUSTER_NAME;
-<a class="jxr_linenumber" name="70" href="#70">70</a>
-<a class="jxr_linenumber" name="71" href="#71">71</a> TaskCluster taskCluster = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/taskexecution/TaskCluster.html">TaskCluster</a>(zkAddr, clusterName);
-<a class="jxr_linenumber" name="72" href="#72">72</a> taskCluster.setup();
-<a class="jxr_linenumber" name="73" href="#73">73</a>
-<a class="jxr_linenumber" name="74" href="#74">74</a> startController(zkAddr, clusterName);
-<a class="jxr_linenumber" name="75" href="#75">75</a>
-<a class="jxr_linenumber" name="76" href="#76">76</a> TaskFactory taskFactory = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/taskexecution/AnalyticsTaskFactory.html">AnalyticsTaskFactory</a>();
-<a class="jxr_linenumber" name="77" href="#77">77</a> TaskResultStore taskResultStore = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/taskexecution/RedisTaskResultStore.html">RedisTaskResultStore</a>(redisHost, redisPort, 1000);
-<a class="jxr_linenumber" name="78" href="#78">78</a>
-<a class="jxr_linenumber" name="79" href="#79">79</a> populateDummyData(taskResultStore);
-<a class="jxr_linenumber" name="80" href="#80">80</a>
-<a class="jxr_linenumber" name="81" href="#81">81</a> startWorkers(zkAddr, TaskCluster.DEFAULT_CLUSTER_NAME, taskFactory, taskResultStore);
-<a class="jxr_linenumber" name="82" href="#82">82</a>
-<a class="jxr_linenumber" name="83" href="#83">83</a> Dag dag = getAnalyticsDag();
-<a class="jxr_linenumber" name="84" href="#84">84</a> taskCluster.submitDag(dag);
-<a class="jxr_linenumber" name="85" href="#85">85</a> }
-<a class="jxr_linenumber" name="86" href="#86">86</a> <strong class="jxr_keyword">catch</strong>(Exception e) {
-<a class="jxr_linenumber" name="87" href="#87">87</a> e.printStackTrace();
-<a class="jxr_linenumber" name="88" href="#88">88</a> <strong class="jxr_keyword">throw</strong> e;
-<a class="jxr_linenumber" name="89" href="#89">89</a> }
-<a class="jxr_linenumber" name="90" href="#90">90</a> <strong class="jxr_keyword">finally</strong> {
-<a class="jxr_linenumber" name="91" href="#91">91</a> <strong class="jxr_keyword">if</strong> (server != <strong class="jxr_keyword">null</strong>) {
-<a class="jxr_linenumber" name="92" href="#92">92</a> <em class="jxr_comment">//server.shutdown();</em>
-<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> }
-<a class="jxr_linenumber" name="96" href="#96">96</a>
-<a class="jxr_linenumber" name="97" href="#97">97</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> populateDummyData(<a href="../../../../org/apache/helix/taskexecution/TaskResultStore.html">TaskResultStore</a> taskResultStore) <strong class="jxr_keyword">throws</strong> Exception {
-<a class="jxr_linenumber" name="98" href="#98">98</a> <strong class="jxr_keyword">float</strong> fraudProbability = 0.01f;
-<a class="jxr_linenumber" name="99" href="#99">99</a> <strong class="jxr_keyword">float</strong> clickProbability = 0.01f;
-<a class="jxr_linenumber" name="100" href="#100">100</a> <strong class="jxr_keyword">int</strong> numImps = 10000;
-<a class="jxr_linenumber" name="101" href="#101">101</a> Random rand = <strong class="jxr_keyword">new</strong> Random();
-<a class="jxr_linenumber" name="102" href="#102">102</a> String[] countries = {<span class="jxr_string">"US"</span>, <span class="jxr_string">"CANADA"</span>, <span class="jxr_string">"UK"</span>, <span class="jxr_string">"CHINA"</span>, <span class="jxr_string">"UNKNOWN"</span>};
-<a class="jxr_linenumber" name="103" href="#103">103</a> String[] genders = {<span class="jxr_string">"M"</span>, <span class="jxr_string">"F"</span>, <span class="jxr_string">"UNKNOWN"</span>};
-<a class="jxr_linenumber" name="104" href="#104">104</a> <strong class="jxr_keyword">for</strong>(<strong class="jxr_keyword">int</strong> i = 0; i < numImps; i++) {
-<a class="jxr_linenumber" name="105" href="#105">105</a> <strong class="jxr_keyword">boolean</strong> isFraudulent = (rand.nextFloat() <= fraudProbability);
-<a class="jxr_linenumber" name="106" href="#106">106</a> String impEventId = <span class="jxr_string">""</span> + Math.abs(rand.nextLong());
-<a class="jxr_linenumber" name="107" href="#107">107</a> String impEvent = impEventId; <em class="jxr_comment">//event id</em>
-<a class="jxr_linenumber" name="108" href="#108">108</a> impEvent += <span class="jxr_string">","</span> + isFraudulent;
-<a class="jxr_linenumber" name="109" href="#109">109</a> impEvent += <span class="jxr_string">","</span> + countries[rand.nextInt(countries.length)];
-<a class="jxr_linenumber" name="110" href="#110">110</a> impEvent += <span class="jxr_string">","</span> + genders[rand.nextInt(genders.length)];
-<a class="jxr_linenumber" name="111" href="#111">111</a> taskResultStore.rpush(FilterTask.IMPRESSIONS, impEvent);
-<a class="jxr_linenumber" name="112" href="#112">112</a>
-<a class="jxr_linenumber" name="113" href="#113">113</a> <strong class="jxr_keyword">boolean</strong> isClick = (rand.nextFloat() <= clickProbability);
-<a class="jxr_linenumber" name="114" href="#114">114</a> <strong class="jxr_keyword">if</strong>(isClick) {
-<a class="jxr_linenumber" name="115" href="#115">115</a> String clickEvent = <span class="jxr_string">""</span> + Math.abs(rand.nextLong()); <em class="jxr_comment">//event id</em>
-<a class="jxr_linenumber" name="116" href="#116">116</a> isFraudulent = (rand.nextFloat() <= fraudProbability);
-<a class="jxr_linenumber" name="117" href="#117">117</a> clickEvent += <span class="jxr_string">","</span> + isFraudulent;
-<a class="jxr_linenumber" name="118" href="#118">118</a> clickEvent += <span class="jxr_string">","</span> + impEventId;
-<a class="jxr_linenumber" name="119" href="#119">119</a> taskResultStore.rpush(FilterTask.CLICKS, clickEvent);
-<a class="jxr_linenumber" name="120" href="#120">120</a> }
-<a class="jxr_linenumber" name="121" href="#121">121</a> }
-<a class="jxr_linenumber" name="122" href="#122">122</a> System.out.println(<span class="jxr_string">"Done populating dummy data"</span>);
-<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">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> startController(String zkAddr, String clusterName)
-<a class="jxr_linenumber" name="126" href="#126">126</a> <strong class="jxr_keyword">throws</strong> Exception {
-<a class="jxr_linenumber" name="127" href="#127">127</a> <strong class="jxr_keyword">final</strong> <a href="../../../../org/apache/helix/HelixManager.html">HelixManager</a> manager = HelixControllerMain.startHelixController(
-<a class="jxr_linenumber" name="128" href="#128">128</a> zkAddr, clusterName, <strong class="jxr_keyword">null</strong>, HelixControllerMain.STANDALONE);
-<a class="jxr_linenumber" name="129" href="#129">129</a>
-<a class="jxr_linenumber" name="130" href="#130">130</a> Runtime.getRuntime().addShutdownHook(<strong class="jxr_keyword">new</strong> Thread() {
-<a class="jxr_linenumber" name="131" href="#131">131</a> @Override
-<a class="jxr_linenumber" name="132" href="#132">132</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> run() {
-<a class="jxr_linenumber" name="133" href="#133">133</a> System.out.println(<span class="jxr_string">"Shutting down cluster manager: "</span>
-<a class="jxr_linenumber" name="134" href="#134">134</a> + manager.getInstanceName());
-<a class="jxr_linenumber" name="135" href="#135">135</a> manager.disconnect();
-<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> }
-<a class="jxr_linenumber" name="139" href="#139">139</a>
-<a class="jxr_linenumber" name="140" href="#140">140</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> startWorkers(String zkAddr, String clusterName,
-<a class="jxr_linenumber" name="141" href="#141">141</a> TaskFactory taskFactory, <a href="../../../../org/apache/helix/taskexecution/TaskResultStore.html">TaskResultStore</a> taskResultStore) {
-<a class="jxr_linenumber" name="142" href="#142">142</a> <strong class="jxr_keyword">int</strong> numWorkers = 10;
-<a class="jxr_linenumber" name="143" href="#143">143</a> Executor executor = Executors.newFixedThreadPool(numWorkers);
-<a class="jxr_linenumber" name="144" href="#144">144</a>
-<a class="jxr_linenumber" name="145" href="#145">145</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i < numWorkers; i++) {
-<a class="jxr_linenumber" name="146" href="#146">146</a> Worker worker = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/taskexecution/Worker.html">Worker</a>(zkAddr, clusterName, <span class="jxr_string">""</span> + i, taskFactory, taskResultStore);
-<a class="jxr_linenumber" name="147" href="#147">147</a> executor.execute(worker);
-<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>
-<a class="jxr_linenumber" name="151" href="#151">151</a>
-<a class="jxr_linenumber" name="152" href="#152">152</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../org/apache/helix/taskexecution/Dag.html">Dag</a> getAnalyticsDag() {
-<a class="jxr_linenumber" name="153" href="#153">153</a> Dag dag = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/taskexecution/Dag.html">Dag</a>();
-<a class="jxr_linenumber" name="154" href="#154">154</a> dag.addNode(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">Node</a>(<span class="jxr_string">"filterImps"</span>, 10, <span class="jxr_string">""</span>));
-<a class="jxr_linenumber" name="155" href="#155">155</a> dag.addNode(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">Node</a>(<span class="jxr_string">"filterClicks"</span>, 5, <span class="jxr_string">""</span>));
-<a class="jxr_linenumber" name="156" href="#156">156</a> dag.addNode(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">Node</a>(<span class="jxr_string">"impClickJoin"</span>, 10, <span class="jxr_string">"filterImps,filterClicks"</span>));
-<a class="jxr_linenumber" name="157" href="#157">157</a> dag.addNode(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">Node</a>(<span class="jxr_string">"impCountsByGender"</span>, 10, <span class="jxr_string">"filterImps"</span>));
-<a class="jxr_linenumber" name="158" href="#158">158</a> dag.addNode(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">Node</a>(<span class="jxr_string">"impCountsByCountry"</span>, 10, <span class="jxr_string">"filterImps"</span>));
-<a class="jxr_linenumber" name="159" href="#159">159</a> dag.addNode(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">Node</a>(<span class="jxr_string">"clickCountsByGender"</span>, 5, <span class="jxr_string">"impClickJoin"</span>));
-<a class="jxr_linenumber" name="160" href="#160">160</a> dag.addNode(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">Node</a>(<span class="jxr_string">"clickCountsByCountry"</span>, 5, <span class="jxr_string">"impClickJoin"</span>));
-<a class="jxr_linenumber" name="161" href="#161">161</a>
-<a class="jxr_linenumber" name="162" href="#162">162</a> dag.addNode(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">Node</a>(<span class="jxr_string">"report"</span>, 1, <span class="jxr_string">"impCountsByGender,impCountsByCountry,clickCountsByGender,clickCountsByCountry"</span>));
-<a class="jxr_linenumber" name="163" href="#163">163</a>
-<a class="jxr_linenumber" name="164" href="#164">164</a> <strong class="jxr_keyword">return</strong> dag;
-<a class="jxr_linenumber" name="165" href="#165">165</a> }
-<a class="jxr_linenumber" name="166" href="#166">166</a>
-<a class="jxr_linenumber" name="167" href="#167">167</a> }
+<a class="jxr_linenumber" name="57" href="#57">57</a>
+<a class="jxr_linenumber" name="58" href="#58">58</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="59" href="#59">59</a> <strong class="jxr_keyword">if</strong> (args.length != 3) {
+<a class="jxr_linenumber" name="60" href="#60">60</a> System.err
+<a class="jxr_linenumber" name="61" href="#61">61</a> .println(<span class="jxr_string">"USAGE: java TaskExecutionDemo zkPort redisHost redisPort"</span>);
+<a class="jxr_linenumber" name="62" href="#62">62</a> System.exit(1);
+<a class="jxr_linenumber" name="63" href="#63">63</a> }
+<a class="jxr_linenumber" name="64" href="#64">64</a>
+<a class="jxr_linenumber" name="65" href="#65">65</a> String redisHost = args[1];
+<a class="jxr_linenumber" name="66" href="#66">66</a> <strong class="jxr_keyword">int</strong> redisPort = Integer.parseInt(args[2]);
+<a class="jxr_linenumber" name="67" href="#67">67</a> ZkServer server = <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="68" href="#68">68</a> <strong class="jxr_keyword">try</strong> {
+<a class="jxr_linenumber" name="69" href="#69">69</a> String baseDir = <span class="jxr_string">"/tmp/TaskExecutionDemo/"</span>;
+<a class="jxr_linenumber" name="70" href="#70">70</a> <strong class="jxr_keyword">final</strong> String dataDir = baseDir + <span class="jxr_string">"zk/dataDir"</span>;
+<a class="jxr_linenumber" name="71" href="#71">71</a> <strong class="jxr_keyword">final</strong> String logDir = baseDir + <span class="jxr_string">"/tmp/logDir"</span>;
+<a class="jxr_linenumber" name="72" href="#72">72</a> FileUtils.deleteDirectory(<strong class="jxr_keyword">new</strong> File(dataDir));
+<a class="jxr_linenumber" name="73" href="#73">73</a> FileUtils.deleteDirectory(<strong class="jxr_keyword">new</strong> File(logDir));
+<a class="jxr_linenumber" name="74" href="#74">74</a>
+<a class="jxr_linenumber" name="75" href="#75">75</a> IDefaultNameSpace defaultNameSpace = <strong class="jxr_keyword">new</strong> IDefaultNameSpace() {
+<a class="jxr_linenumber" name="76" href="#76">76</a> @Override
+<a class="jxr_linenumber" name="77" href="#77">77</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> createDefaultNameSpace(ZkClient zkClient) {
+<a class="jxr_linenumber" name="78" href="#78">78</a>
+<a class="jxr_linenumber" name="79" href="#79">79</a> }
+<a class="jxr_linenumber" name="80" href="#80">80</a> };
+<a class="jxr_linenumber" name="81" href="#81">81</a>
+<a class="jxr_linenumber" name="82" href="#82">82</a> <strong class="jxr_keyword">int</strong> zkPort = Integer.parseInt(args[0]);
+<a class="jxr_linenumber" name="83" href="#83">83</a> server = <strong class="jxr_keyword">new</strong> ZkServer(dataDir, logDir, defaultNameSpace, zkPort);
+<a class="jxr_linenumber" name="84" href="#84">84</a> server.start();
+<a class="jxr_linenumber" name="85" href="#85">85</a>
+<a class="jxr_linenumber" name="86" href="#86">86</a> String zkAddr = <span class="jxr_string">"localhost:"</span> + zkPort;
+<a class="jxr_linenumber" name="87" href="#87">87</a> String clusterName = TaskCluster.DEFAULT_CLUSTER_NAME;
+<a class="jxr_linenumber" name="88" href="#88">88</a>
+<a class="jxr_linenumber" name="89" href="#89">89</a> TaskCluster taskCluster = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/taskexecution/TaskCluster.html">TaskCluster</a>(zkAddr, clusterName);
+<a class="jxr_linenumber" name="90" href="#90">90</a> taskCluster.setup();
+<a class="jxr_linenumber" name="91" href="#91">91</a>
+<a class="jxr_linenumber" name="92" href="#92">92</a> startController(zkAddr, clusterName);
+<a class="jxr_linenumber" name="93" href="#93">93</a>
+<a class="jxr_linenumber" name="94" href="#94">94</a> TaskFactory taskFactory = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/taskexecution/AnalyticsTaskFactory.html">AnalyticsTaskFactory</a>();
+<a class="jxr_linenumber" name="95" href="#95">95</a> TaskResultStore taskResultStore = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/taskexecution/RedisTaskResultStore.html">RedisTaskResultStore</a>(redisHost, redisPort, 1000);
+<a class="jxr_linenumber" name="96" href="#96">96</a>
+<a class="jxr_linenumber" name="97" href="#97">97</a> populateDummyData(taskResultStore);
+<a class="jxr_linenumber" name="98" href="#98">98</a>
+<a class="jxr_linenumber" name="99" href="#99">99</a> startWorkers(zkAddr, TaskCluster.DEFAULT_CLUSTER_NAME, taskFactory, taskResultStore);
+<a class="jxr_linenumber" name="100" href="#100">100</a>
+<a class="jxr_linenumber" name="101" href="#101">101</a> Dag dag = getAnalyticsDag();
+<a class="jxr_linenumber" name="102" href="#102">102</a> taskCluster.submitDag(dag);
+<a class="jxr_linenumber" name="103" href="#103">103</a> }
+<a class="jxr_linenumber" name="104" href="#104">104</a> <strong class="jxr_keyword">catch</strong>(Exception e) {
+<a class="jxr_linenumber" name="105" href="#105">105</a> e.printStackTrace();
+<a class="jxr_linenumber" name="106" href="#106">106</a> <strong class="jxr_keyword">throw</strong> e;
+<a class="jxr_linenumber" name="107" href="#107">107</a> }
+<a class="jxr_linenumber" name="108" href="#108">108</a> <strong class="jxr_keyword">finally</strong> {
+<a class="jxr_linenumber" name="109" href="#109">109</a> <strong class="jxr_keyword">if</strong> (server != <strong class="jxr_keyword">null</strong>) {
+<a class="jxr_linenumber" name="110" href="#110">110</a> <em class="jxr_comment">//server.shutdown();</em>
+<a class="jxr_linenumber" name="111" href="#111">111</a> }
+<a class="jxr_linenumber" name="112" href="#112">112</a> }
+<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">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> populateDummyData(<a href="../../../../org/apache/helix/taskexecution/TaskResultStore.html">TaskResultStore</a> taskResultStore) <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="116" href="#116">116</a> <strong class="jxr_keyword">float</strong> fraudProbability = 0.01f;
+<a class="jxr_linenumber" name="117" href="#117">117</a> <strong class="jxr_keyword">float</strong> clickProbability = 0.01f;
+<a class="jxr_linenumber" name="118" href="#118">118</a> <strong class="jxr_keyword">int</strong> numImps = NUM_IMP_EVENTS;
+<a class="jxr_linenumber" name="119" href="#119">119</a> Random rand = <strong class="jxr_keyword">new</strong> Random();
+<a class="jxr_linenumber" name="120" href="#120">120</a> String[] countries = {<span class="jxr_string">"US"</span>, <span class="jxr_string">"CANADA"</span>, <span class="jxr_string">"UK"</span>, <span class="jxr_string">"CHINA"</span>, <span class="jxr_string">"UNKNOWN"</span>};
+<a class="jxr_linenumber" name="121" href="#121">121</a> String[] genders = {<span class="jxr_string">"M"</span>, <span class="jxr_string">"F"</span>, <span class="jxr_string">"UNKNOWN"</span>};
+<a class="jxr_linenumber" name="122" href="#122">122</a> <strong class="jxr_keyword">for</strong>(<strong class="jxr_keyword">int</strong> i = 0; i < numImps; i++) {
+<a class="jxr_linenumber" name="123" href="#123">123</a> <strong class="jxr_keyword">boolean</strong> isFraudulent = (rand.nextFloat() <= fraudProbability);
+<a class="jxr_linenumber" name="124" href="#124">124</a> String impEventId = <span class="jxr_string">""</span> + Math.abs(rand.nextLong());
+<a class="jxr_linenumber" name="125" href="#125">125</a> String impEvent = impEventId; <em class="jxr_comment">//event id</em>
+<a class="jxr_linenumber" name="126" href="#126">126</a> impEvent += <span class="jxr_string">","</span> + isFraudulent;
+<a class="jxr_linenumber" name="127" href="#127">127</a> impEvent += <span class="jxr_string">","</span> + countries[rand.nextInt(countries.length)];
+<a class="jxr_linenumber" name="128" href="#128">128</a> impEvent += <span class="jxr_string">","</span> + genders[rand.nextInt(genders.length)];
+<a class="jxr_linenumber" name="129" href="#129">129</a> taskResultStore.rpush(FilterTask.IMPRESSIONS, impEvent);
+<a class="jxr_linenumber" name="130" href="#130">130</a>
+<a class="jxr_linenumber" name="131" href="#131">131</a> <strong class="jxr_keyword">boolean</strong> isClick = (rand.nextFloat() <= clickProbability);
+<a class="jxr_linenumber" name="132" href="#132">132</a> <strong class="jxr_keyword">if</strong>(isClick) {
+<a class="jxr_linenumber" name="133" href="#133">133</a> String clickEvent = <span class="jxr_string">""</span> + Math.abs(rand.nextLong()); <em class="jxr_comment">//event id</em>
+<a class="jxr_linenumber" name="134" href="#134">134</a> isFraudulent = (rand.nextFloat() <= fraudProbability);
+<a class="jxr_linenumber" name="135" href="#135">135</a> clickEvent += <span class="jxr_string">","</span> + isFraudulent;
+<a class="jxr_linenumber" name="136" href="#136">136</a> clickEvent += <span class="jxr_string">","</span> + impEventId;
+<a class="jxr_linenumber" name="137" href="#137">137</a> taskResultStore.rpush(FilterTask.CLICKS, clickEvent);
+<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> System.out.println(<span class="jxr_string">"Done populating dummy data"</span>);
+<a class="jxr_linenumber" name="141" href="#141">141</a> }
+<a class="jxr_linenumber" name="142" href="#142">142</a>
+<a class="jxr_linenumber" name="143" href="#143">143</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> startController(String zkAddr, String clusterName)
+<a class="jxr_linenumber" name="144" href="#144">144</a> <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="145" href="#145">145</a> <strong class="jxr_keyword">final</strong> <a href="../../../../org/apache/helix/HelixManager.html">HelixManager</a> manager = HelixControllerMain.startHelixController(
+<a class="jxr_linenumber" name="146" href="#146">146</a> zkAddr, clusterName, <strong class="jxr_keyword">null</strong>, HelixControllerMain.STANDALONE);
+<a class="jxr_linenumber" name="147" href="#147">147</a>
+<a class="jxr_linenumber" name="148" href="#148">148</a> Runtime.getRuntime().addShutdownHook(<strong class="jxr_keyword">new</strong> Thread() {
+<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> <strong class="jxr_keyword">void</strong> run() {
+<a class="jxr_linenumber" name="151" href="#151">151</a> System.out.println(<span class="jxr_string">"Shutting down cluster manager: "</span>
+<a class="jxr_linenumber" name="152" href="#152">152</a> + manager.getInstanceName());
+<a class="jxr_linenumber" name="153" href="#153">153</a> manager.disconnect();
+<a class="jxr_linenumber" name="154" href="#154">154</a> }
+<a class="jxr_linenumber" name="155" href="#155">155</a> });
+<a class="jxr_linenumber" name="156" href="#156">156</a> }
+<a class="jxr_linenumber" name="157" href="#157">157</a>
+<a class="jxr_linenumber" name="158" href="#158">158</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> startWorkers(String zkAddr, String clusterName,
+<a class="jxr_linenumber" name="159" href="#159">159</a> TaskFactory taskFactory, <a href="../../../../org/apache/helix/taskexecution/TaskResultStore.html">TaskResultStore</a> taskResultStore) {
+<a class="jxr_linenumber" name="160" href="#160">160</a> <strong class="jxr_keyword">int</strong> numWorkers = NUM_WORKERS;
+<a class="jxr_linenumber" name="161" href="#161">161</a> Executor executor = Executors.newFixedThreadPool(numWorkers);
+<a class="jxr_linenumber" name="162" href="#162">162</a>
+<a class="jxr_linenumber" name="163" href="#163">163</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i < numWorkers; i++) {
+<a class="jxr_linenumber" name="164" href="#164">164</a> Worker worker = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/taskexecution/Worker.html">Worker</a>(zkAddr, clusterName, <span class="jxr_string">""</span> + i, taskFactory, taskResultStore);
+<a class="jxr_linenumber" name="165" href="#165">165</a> executor.execute(worker);
+<a class="jxr_linenumber" name="166" href="#166">166</a> }
+<a class="jxr_linenumber" name="167" href="#167">167</a> }
+<a class="jxr_linenumber" name="168" href="#168">168</a>
+<a class="jxr_linenumber" name="169" href="#169">169</a>
+<a class="jxr_linenumber" name="170" href="#170">170</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../org/apache/helix/taskexecution/Dag.html">Dag</a> getAnalyticsDag() {
+<a class="jxr_linenumber" name="171" href="#171">171</a> Dag dag = <strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/taskexecution/Dag.html">Dag</a>();
+<a class="jxr_linenumber" name="172" href="#172">172</a> dag.addNode(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">Node</a>(<span class="jxr_string">"filterImps"</span>, 10, <span class="jxr_string">""</span>));
+<a class="jxr_linenumber" name="173" href="#173">173</a> dag.addNode(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">Node</a>(<span class="jxr_string">"filterClicks"</span>, 5, <span class="jxr_string">""</span>));
+<a class="jxr_linenumber" name="174" href="#174">174</a> dag.addNode(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">Node</a>(<span class="jxr_string">"impClickJoin"</span>, 10, <span class="jxr_string">"filterImps,filterClicks"</span>));
+<a class="jxr_linenumber" name="175" href="#175">175</a> dag.addNode(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">Node</a>(<span class="jxr_string">"impCountsByGender"</span>, 10, <span class="jxr_string">"filterImps"</span>));
+<a class="jxr_linenumber" name="176" href="#176">176</a> dag.addNode(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">Node</a>(<span class="jxr_string">"impCountsByCountry"</span>, 10, <span class="jxr_string">"filterImps"</span>));
+<a class="jxr_linenumber" name="177" href="#177">177</a> dag.addNode(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">Node</a>(<span class="jxr_string">"clickCountsByGender"</span>, 5, <span class="jxr_string">"impClickJoin"</span>));
+<a class="jxr_linenumber" name="178" href="#178">178</a> dag.addNode(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">Node</a>(<span class="jxr_string">"clickCountsByCountry"</span>, 5, <span class="jxr_string">"impClickJoin"</span>));
+<a class="jxr_linenumber" name="179" href="#179">179</a>
+<a class="jxr_linenumber" name="180" href="#180">180</a> dag.addNode(<strong class="jxr_keyword">new</strong> <a href="../../../../org/apache/helix/controller/HierarchicalDataHolder.html">Node</a>(<span class="jxr_string">"report"</span>, 1, <span class="jxr_string">"impCountsByGender,impCountsByCountry,clickCountsByGender,clickCountsByCountry"</span>));
+<a class="jxr_linenumber" name="181" href="#181">181</a>
+<a class="jxr_linenumber" name="182" href="#182">182</a> <strong class="jxr_keyword">return</strong> dag;
+<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> }
</pre>
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