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From don...@apache.org
Subject [44/51] [abbrv] [partial] incubator-predictionio-site git commit: Documentation based on apache/incubator-predictionio#df568b6d505812928b59a662408d90119d524173
Date Sat, 08 Oct 2016 23:42:41 GMT
http://git-wip-us.apache.org/repos/asf/incubator-predictionio-site/blob/64c98d37/datacollection/channel/index.html
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+<!DOCTYPE html><html><head><title>Channel</title><meta charset="utf-8"/><meta content="IE=edge,chrome=1" http-equiv="X-UA-Compatible"/><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta class="swiftype" name="title" data-type="string" content="Channel"/><link rel="canonical" href="https://docs.prediction.io/datacollection/channel/"/><link href="/images/favicon/normal-b330020a.png" rel="shortcut icon"/><link href="/images/favicon/apple-c0febcf2.png" rel="apple-touch-icon"/><link href="//fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800" rel="stylesheet"/><link href="//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" rel="stylesheet"/><link href="/stylesheets/application-a2a2f408.css" rel="stylesheet" type="text/css"/><script src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.2/html5shiv.min.js"></script><script src="//cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MM
 L_HTMLorMML"></script><script src="//use.typekit.net/pqo0itb.js"></script><script>try{Typekit.load({ async: true });}catch(e){}</script></head><body><div id="global"><header><div class="container" id="header-wrapper"><div class="row"><div class="col-sm-12"><div id="logo-wrapper"><span id="drawer-toggle"></span><a href="#"></a><a href="http://predictionio.incubator.apache.org/"><img alt="PredictionIO" id="logo" src="/images/logos/logo-ee2b9bb3.png"/></a></div><div id="menu-wrapper"><div id="pill-wrapper"><a class="pill left" href="/gallery/template-gallery">TEMPLATES</a> <a class="pill right" href="//github.com/apache/incubator-predictionio/">OPEN SOURCE</a></div></div><img class="mobile-search-bar-toggler hidden-md hidden-lg" src="/images/icons/search-glass-704bd4ff.png"/></div></div></div></header><div id="search-bar-row-wrapper"><div class="container-fluid" id="search-bar-row"><div class="row"><div class="col-md-9 col-sm-11 col-xs-11"><div class="hidden-md hidden-lg" id="mobile-pa
 ge-heading-wrapper"><p>PredictionIO Docs</p><h4>Channel</h4></div><h4 class="hidden-sm hidden-xs">PredictionIO Docs</h4></div><div class="col-md-3 col-sm-1 col-xs-1 hidden-md hidden-lg"><img id="left-menu-indicator" src="/images/icons/down-arrow-dfe9f7fe.png"/></div><div class="col-md-3 col-sm-12 col-xs-12 swiftype-wrapper"><div class="swiftype"><form class="search-form"><img class="search-box-toggler hidden-xs hidden-sm" src="/images/icons/search-glass-704bd4ff.png"/><div class="search-box"><img src="/images/icons/search-glass-704bd4ff.png"/><input type="text" id="st-search-input" class="st-search-input" placeholder="Search Doc..."/></div><img class="swiftype-row-hider hidden-md hidden-lg" src="/images/icons/drawer-toggle-active-fcbef12a.png"/></form></div></div><div class="mobile-left-menu-toggler hidden-md hidden-lg"></div></div></div></div><div id="page" class="container-fluid"><div class="row"><div id="left-menu-wrapper" class="col-md-3"><nav id="nav-main"><ul><li class="level-
 1"><a class="expandible" href="/"><span>Apache PredictionIO (incubating) Documentation</span></a><ul><li class="level-2"><a class="final" href="/"><span>Welcome to Apache PredictionIO (incubating)</span></a></li></ul></li><li class="level-1"><a class="expandible" href="#"><span>Getting Started</span></a><ul><li class="level-2"><a class="final" href="/start/"><span>A Quick Intro</span></a></li><li class="level-2"><a class="final" href="/install/"><span>Installing Apache PredictionIO (incubating)</span></a></li><li class="level-2"><a class="final" href="/start/download/"><span>Downloading an Engine Template</span></a></li><li class="level-2"><a class="final" href="/start/deploy/"><span>Deploying Your First Engine</span></a></li><li class="level-2"><a class="final" href="/start/customize/"><span>Customizing the Engine</span></a></li></ul></li><li class="level-1"><a class="expandible" href="#"><span>Integrating with Your App</span></a><ul><li class="level-2"><a class="final" href="/appi
 ntegration/"><span>App Integration Overview</span></a></li><li class="level-2"><a class="expandible" href="/sdk/"><span>List of SDKs</span></a><ul><li class="level-3"><a class="final" href="/sdk/java/"><span>Java & Android SDK</span></a></li><li class="level-3"><a class="final" href="/sdk/php/"><span>PHP SDK</span></a></li><li class="level-3"><a class="final" href="/sdk/python/"><span>Python SDK</span></a></li><li class="level-3"><a class="final" href="/sdk/ruby/"><span>Ruby SDK</span></a></li><li class="level-3"><a class="final" href="/sdk/community/"><span>Community Powered SDKs</span></a></li></ul></li></ul></li><li class="level-1"><a class="expandible" href="#"><span>Deploying an Engine</span></a><ul><li class="level-2"><a class="final" href="/deploy/"><span>Deploying as a Web Service</span></a></li><li class="level-2"><a class="final" href="/cli/#engine-commands"><span>Engine Command-line Interface</span></a></li><li class="level-2"><a class="final" href="/deploy/monitoring/"><
 span>Monitoring Engine</span></a></li><li class="level-2"><a class="final" href="/deploy/engineparams/"><span>Setting Engine Parameters</span></a></li><li class="level-2"><a class="final" href="/deploy/enginevariants/"><span>Deploying Multiple Engine Variants</span></a></li></ul></li><li class="level-1"><a class="expandible" href="#"><span>Customizing an Engine</span></a><ul><li class="level-2"><a class="final" href="/customize/"><span>Learning DASE</span></a></li><li class="level-2"><a class="final" href="/customize/dase/"><span>Implement DASE</span></a></li><li class="level-2"><a class="final" href="/customize/troubleshooting/"><span>Troubleshooting Engine Development</span></a></li><li class="level-2"><a class="final" href="/api/current/#package"><span>Engine Scala APIs</span></a></li></ul></li><li class="level-1"><a class="expandible" href="#"><span>Collecting and Analyzing Data</span></a><ul><li class="level-2"><a class="final" href="/datacollection/"><span>Event Server Overvie
 w</span></a></li><li class="level-2"><a class="final" href="/cli/#event-server-commands"><span>Event Server Command-line Interface</span></a></li><li class="level-2"><a class="final" href="/datacollection/eventapi/"><span>Collecting Data with REST/SDKs</span></a></li><li class="level-2"><a class="final" href="/datacollection/eventmodel/"><span>Events Modeling</span></a></li><li class="level-2"><a class="final" href="/datacollection/webhooks/"><span>Unifying Multichannel Data with Webhooks</span></a></li><li class="level-2"><a class="final active" href="/datacollection/channel/"><span>Channel</span></a></li><li class="level-2"><a class="final" href="/datacollection/batchimport/"><span>Importing Data in Batch</span></a></li><li class="level-2"><a class="final" href="/datacollection/analytics/"><span>Using Analytics Tools</span></a></li></ul></li><li class="level-1"><a class="expandible" href="#"><span>Choosing an Algorithm(s)</span></a><ul><li class="level-2"><a class="final" href="/a
 lgorithm/"><span>Built-in Algorithm Libraries</span></a></li><li class="level-2"><a class="final" href="/algorithm/switch/"><span>Switching to Another Algorithm</span></a></li><li class="level-2"><a class="final" href="/algorithm/multiple/"><span>Combining Multiple Algorithms</span></a></li><li class="level-2"><a class="final" href="/algorithm/custom/"><span>Adding Your Own Algorithms</span></a></li></ul></li><li class="level-1"><a class="expandible" href="#"><span>ML Tuning and Evaluation</span></a><ul><li class="level-2"><a class="final" href="/evaluation/"><span>Overview</span></a></li><li class="level-2"><a class="final" href="/evaluation/paramtuning/"><span>Hyperparameter Tuning</span></a></li><li class="level-2"><a class="final" href="/evaluation/evaluationdashboard/"><span>Evaluation Dashboard</span></a></li><li class="level-2"><a class="final" href="/evaluation/metricchoose/"><span>Choosing Evaluation Metrics</span></a></li><li class="level-2"><a class="final" href="/evaluat
 ion/metricbuild/"><span>Building Evaluation Metrics</span></a></li></ul></li><li class="level-1"><a class="expandible" href="#"><span>System Architecture</span></a><ul><li class="level-2"><a class="final" href="/system/"><span>Architecture Overview</span></a></li><li class="level-2"><a class="final" href="/system/anotherdatastore/"><span>Using Another Data Store</span></a></li></ul></li><li class="level-1"><a class="expandible" href="#"><span>Engine Template Gallery</span></a><ul><li class="level-2"><a class="final" href="/gallery/template-gallery/"><span>Browse</span></a></li><li class="level-2"><a class="final" href="/community/submit-template/"><span>Submit your Engine as a Template</span></a></li></ul></li><li class="level-1"><a class="expandible" href="#"><span>Demo Tutorials</span></a><ul><li class="level-2"><a class="final" href="/demo/tapster/"><span>Comics Recommendation Demo</span></a></li><li class="level-2"><a class="final" href="/demo/community/"><span>Community Contrib
 uted Demo</span></a></li><li class="level-2"><a class="final" href="/demo/textclassification/"><span>Text Classification Engine Tutorial</span></a></li></ul></li><li class="level-1"><a class="expandible" href="/community/"><span>Getting Involved</span></a><ul><li class="level-2"><a class="final" href="/community/contribute-code/"><span>Contribute Code</span></a></li><li class="level-2"><a class="final" href="/community/contribute-documentation/"><span>Contribute Documentation</span></a></li><li class="level-2"><a class="final" href="/community/contribute-sdk/"><span>Contribute a SDK</span></a></li><li class="level-2"><a class="final" href="/community/contribute-webhook/"><span>Contribute a Webhook</span></a></li><li class="level-2"><a class="final" href="/community/projects/"><span>Community Projects</span></a></li></ul></li><li class="level-1"><a class="expandible" href="#"><span>Getting Help</span></a><ul><li class="level-2"><a class="final" href="/resources/faq/"><span>FAQs</span
 ></a></li><li class="level-2"><a class="final" href="/support/"><span>Support</span></a></li></ul></li><li class="level-1"><a class="expandible" href="#"><span>Resources</span></a><ul><li class="level-2"><a class="final" href="/resources/intellij/"><span>Developing Engines with IntelliJ IDEA</span></a></li><li class="level-2"><a class="final" href="/resources/upgrade/"><span>Upgrade Instructions</span></a></li><li class="level-2"><a class="final" href="/resources/glossary/"><span>Glossary</span></a></li></ul></li></ul></nav></div><div class="col-md-9 col-sm-12"><div class="content-header hidden-md hidden-lg"><div id="breadcrumbs" class="hidden-sm hidden xs"><ul><li><a href="#">Collecting and Analyzing Data</a><span class="spacer">&gt;</span></li><li><span class="last">Channel</span></li></ul></div><div id="page-title"><h1>Channel</h1></div></div><div id="table-of-content-wrapper"><h5>On this page</h5><aside id="table-of-contents"><ul> <li> <a href="#create-a-new-channel">Create a ne
 w Channel</a> </li> <li> <a href="#collect-data-through-channel">Collect data through Channel</a> </li> <li> <a href="#delete-a-channel-including-all-imported-data">Delete a Channel (including all imported data)</a> </li> <li> <a href="#delete-the-data-only-of-a-channel">Delete the data-only of a Channel</a> </li> <li> <a href="#accessing-channel-data-in-engine">Accessing Channel Data in Engine</a> </li> </ul> </aside><hr/><a id="edit-page-link" href="https://github.com/apache/incubator-predictionio/tree/livedoc/docs/manual/source/datacollection/channel.html.md.erb"><img src="/images/icons/edit-pencil-d6c1bb3d.png"/>Edit this page</a></div><div class="content-header hidden-sm hidden-xs"><div id="breadcrumbs" class="hidden-sm hidden xs"><ul><li><a href="#">Collecting and Analyzing Data</a><span class="spacer">&gt;</span></li><li><span class="last">Channel</span></li></ul></div><div id="page-title"><h1>Channel</h1></div></div><div class="content"><p>Each App has a default channel (wit
 hout name) which stores all incoming events. This &quot;default&quot; one is used when channel is not specified.</p><p>You may create additional Channels for the App. Creating multiple Channels is advanced usage. You don&#39;t need to create any in order to use Apache PredictionIO (incubating). The Channel is associated with one App only and must have unique name within the same App.</p><p>Creating multiple Channels allows you more easily to identify, manage and use specific event data if you may collect events from different multiple sources (eg. mobile, website, or third-party webhooks service) for the your application.</p><p>(More usage details coming soon...)</p><h2 id='create-a-new-channel' class='header-anchors'>Create a new Channel</h2><p>For example, to create a new channel &quot;myChannel&quot; for app &quot;myApp&quot;, run following <code>pio</code> command:</p><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align
 : right"><pre class="lineno">1</pre></td><td class="code"><pre>pio app channel-new myApp myChannel
+</pre></td></tr></tbody></table> </div> <p>you should see something like the following outputs:</p><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1
+2
+3
+4
+5
+6
+7</pre></td><td class="code"><pre><span class="o">[</span>INFO] <span class="o">[</span>App<span class="nv">$]</span> Updated Channel meta-data.
+<span class="o">[</span>INFO] <span class="o">[</span>HBLEvents] The table predictionio_eventdata:events_5_2 doesn<span class="s1">'t exist yet. Creating now...
+[INFO] [App$] Initialized Event Store for the channel: myChannel.
+[INFO] [App$] Created new channel:
+[INFO] [App$]     Channel Name: myChannel
+[INFO] [App$]       Channel ID: 2
+[INFO] [App$]           App ID: 5
+</span></pre></td></tr></tbody></table> </div> <p>Now &quot;myChannel&quot; is created and ready for collecting data.</p><h2 id='collect-data-through-channel' class='header-anchors'>Collect data through Channel</h2><p>The Event API support optional <code>channel</code> query parameter. This allows you to import and query events of the specified channel. When the <code>channel</code> parameter is not specified, the data is collected through the default channel.</p><p>URL: <code>http://localhost:7070/events.json?accessKey=yourAccessKeyString&amp;channel=yourChannelName</code></p><p>Query parameters:</p> <table><thead> <tr> <th style="text-align: left">Field</th> <th style="text-align: left">Type</th> <th style="text-align: left">Description</th> </tr> </thead><tbody> <tr> <td style="text-align: left"><code>accessKey</code></td> <td style="text-align: left">String</td> <td style="text-align: left">The Access Key for your App</td> </tr> <tr> <td style="text-align: left"><code>channel</c
 ode></td> <td style="text-align: left">String</td> <td style="text-align: left">The channel name (optional). Specify this to import data to this channel. <strong>NOTE: supported in PIO version &gt;= 0.9.2</strong> only. Channel must be created first.</td> </tr> </tbody></table> <p>For SDK usage, one EventClient should be responsible for collecting data of one specific channel. The channel name is specified when the EventClient object is instantiated.</p><p>For example, the following code import event to &quot;YOUR_CHANNEL&quot; of the corresponding App.</p><div class="tabs"> <ul class="control"> <li data-lang="bash"><a href="#tab-0589eb19-3e54-48b1-9ac0-ebe1a28f8ee2">Raw HTTP</a></li> <li data-lang="php"><a href="#tab-de29c450-351b-40b1-85ed-3b90ea0634a5">PHP SDK</a></li> <li data-lang="python"><a href="#tab-c107b61a-9f2d-4bf6-a424-14c4f07f9716">Python SDK</a></li> <li data-lang="ruby"><a href="#tab-3cbb9375-96a2-48b3-ae4e-8e1d5e4e8448">Ruby SDK</a></li> <li data-lang="java"><a href
 ="#tab-f54b66af-d996-48df-a629-8e672ee97952">Java SDK</a></li> </ul> <div data-tab="Raw HTTP" data-lang="bash" id="tab-0589eb19-3e54-48b1-9ac0-ebe1a28f8ee2"> <div class="highlight shell"> <table style="border-spacing: 0"><tbody><tr> <td class="gutter gl" style="text-align: right"><pre class="lineno">1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
+13
+14</pre></td> <td class="code"><pre><span class="gp">$ </span>curl -i -X POST http://localhost:7070/events.json?accessKey<span class="o">=</span>YOUR_ACCESS_KEY&amp;channel<span class="o">=</span>YOUR_CHANNEL <span class="se">\</span>
+-H <span class="s2">"Content-Type: application/json"</span> <span class="se">\</span>
+-d <span class="s1">'{
+  "event" : "my_event",
+  "entityType" : "user",
+  "entityId" : "uid",
+  "targetEntityType" : "item",
+  "targetEntityId" : "iid",
+  "properties" : {
+    "someProperty" : "value1",
+    "anotherProperty" : "value2"
+  },
+  "eventTime" : "2004-12-13T21:39:45.618Z"
+}'</span>
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="PHP SDK" data-lang="php" id="tab-de29c450-351b-40b1-85ed-3b90ea0634a5"> (TODO: update me) </div> <div data-tab="Python SDK" data-lang="python" id="tab-c107b61a-9f2d-4bf6-a424-14c4f07f9716"> <div class="highlight python"> <table style="border-spacing: 0"><tbody><tr> <td class="gutter gl" style="text-align: right"><pre class="lineno">1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
+13
+14
+15
+16
+17
+18
+19
+20
+21</pre></td> <td class="code"><pre><span class="kn">from</span> <span class="nn">predictionio</span> <span class="kn">import</span> <span class="n">EventClient</span>
+<span class="kn">from</span> <span class="nn">datetime</span> <span class="kn">import</span> <span class="n">datetime</span>
+<span class="kn">import</span> <span class="nn">pytz</span>
+
+<span class="c"># Create a EventClient for "YOUR_CHANNEL"</span>
+<span class="n">client</span> <span class="o">=</span> <span class="n">EventClient</span><span class="p">(</span><span class="s">'YOUR_ACCESS_KEY'</span><span class="p">,</span> <span class="s">"http://localhost:7070"</span><span class="p">,</span>
+  <span class="n">channel</span><span class="o">=</span><span class="s">'YOUR_CHANNEL'</span><span class="p">)</span> <span class="c"># default channel if not specified</span>
+
+<span class="n">event_properties</span> <span class="o">=</span> <span class="p">{</span>
+    <span class="s">"someProperty"</span> <span class="p">:</span> <span class="s">"value1"</span><span class="p">,</span>
+    <span class="s">"anotherProperty"</span> <span class="p">:</span> <span class="s">"value2"</span><span class="p">,</span>
+    <span class="p">}</span>
+<span class="n">event_response</span> <span class="o">=</span> <span class="n">client</span><span class="o">.</span><span class="n">create_event</span><span class="p">(</span>
+    <span class="n">event</span><span class="o">=</span><span class="s">"my_event"</span><span class="p">,</span>
+    <span class="n">entity_type</span><span class="o">=</span><span class="s">"user"</span><span class="p">,</span>
+    <span class="n">entity_id</span><span class="o">=</span><span class="s">"uid"</span><span class="p">,</span>
+    <span class="n">target_entity_type</span><span class="o">=</span><span class="s">"item"</span><span class="p">,</span>
+    <span class="n">target_entity_id</span><span class="o">=</span><span class="s">"iid"</span><span class="p">,</span>
+    <span class="n">properties</span><span class="o">=</span><span class="n">event_properties</span><span class="p">,</span>
+    <span class="n">event_time</span><span class="o">=</span><span class="n">datetime</span><span class="p">(</span><span class="mi">2014</span><span class="p">,</span> <span class="mi">12</span><span class="p">,</span> <span class="mi">13</span><span class="p">,</span> <span class="mi">21</span><span class="p">,</span> <span class="mi">38</span><span class="p">,</span> <span class="mi">45</span><span class="p">,</span> <span class="mi">618000</span><span class="p">,</span> <span class="n">pytz</span><span class="o">.</span><span class="n">utc</span><span class="p">))</span>
+
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Ruby SDK" data-lang="ruby" id="tab-3cbb9375-96a2-48b3-ae4e-8e1d5e4e8448"> (TODO: update me) </div> <div data-tab="Java SDK" data-lang="java" id="tab-f54b66af-d996-48df-a629-8e672ee97952"> <div class="highlight java"> <table style="border-spacing: 0"><tbody><tr> <td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td> <td class="code"><pre><span class="o">(</span><span class="n">coming</span> <span class="n">soon</span><span class="o">)</span>
+</pre></td> </tr></tbody></table> </div> </div> </div> <p>You can also follow the EventAPI <a href="/datacollection/eventapi/#debugging-recipes">debug receipts</a> to query the events of specific channel by adding the <code>channel</code> query parameter in the URL.</p><h2 id='delete-a-channel-(including-all-imported-data)' class='header-anchors'>Delete a Channel (including all imported data)</h2><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td class="code"><pre>pio app channel-delete &lt;app name&gt; &lt;channel name&gt;
+</pre></td></tr></tbody></table> </div> <h2 id='delete-the-data-only-of-a-channel' class='header-anchors'>Delete the data-only of a Channel</h2><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td class="code"><pre>pio app data-delete &lt;app name&gt; --channel &lt;channel name&gt;
+</pre></td></tr></tbody></table> </div> <h2 id='accessing-channel-data-in-engine' class='header-anchors'>Accessing Channel Data in Engine</h2><p>To acccess channel data, simply specify the channel name when use the PEventStore or LEventStore API. Data is read from from the default channel if channelName is not specified.</p><p>For example, read data from default channel:</p><div class="highlight scala"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1
+2
+3
+4
+5
+6
+7
+8</pre></td><td class="code"><pre>
+    <span class="k">val</span> <span class="n">eventsRDD</span><span class="k">:</span> <span class="kt">RDD</span><span class="o">[</span><span class="kt">Event</span><span class="o">]</span> <span class="k">=</span> <span class="nc">PEventStore</span><span class="o">.</span><span class="n">find</span><span class="o">(</span>
+      <span class="n">appName</span> <span class="k">=</span> <span class="n">dsp</span><span class="o">.</span><span class="n">appName</span><span class="o">,</span>
+      <span class="n">entityType</span> <span class="k">=</span> <span class="nc">Some</span><span class="o">(</span><span class="s">"user"</span><span class="o">),</span>
+      <span class="n">eventNames</span> <span class="k">=</span> <span class="nc">Some</span><span class="o">(</span><span class="nc">List</span><span class="o">(</span><span class="s">"rate"</span><span class="o">,</span> <span class="s">"buy"</span><span class="o">)),</span> <span class="c1">// read "rate" and "buy" event
+</span>      <span class="c1">// targetEntityType is optional field of an event.
+</span>      <span class="n">targetEntityType</span> <span class="k">=</span> <span class="nc">Some</span><span class="o">(</span><span class="nc">Some</span><span class="o">(</span><span class="s">"item"</span><span class="o">)))(</span><span class="n">sc</span><span class="o">)</span>
+
+</pre></td></tr></tbody></table> </div> <p>For examlpe, read data from the channel &quot;CHANNEL_NAME&quot;</p><div class="highlight scala"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1
+2
+3
+4
+5
+6
+7
+8
+9</pre></td><td class="code"><pre>
+    <span class="k">val</span> <span class="n">eventsRDD</span><span class="k">:</span> <span class="kt">RDD</span><span class="o">[</span><span class="kt">Event</span><span class="o">]</span> <span class="k">=</span> <span class="nc">PEventStore</span><span class="o">.</span><span class="n">find</span><span class="o">(</span>
+      <span class="n">appName</span> <span class="k">=</span> <span class="n">dsp</span><span class="o">.</span><span class="n">appName</span><span class="o">,</span>
+      <span class="n">channelName</span> <span class="k">=</span> <span class="nc">Some</span><span class="o">(</span><span class="s">"CHANNEL_NAME"</span><span class="o">),</span> <span class="c1">// ADDED
+</span>      <span class="n">entityType</span> <span class="k">=</span> <span class="nc">Some</span><span class="o">(</span><span class="s">"user"</span><span class="o">),</span>
+      <span class="n">eventNames</span> <span class="k">=</span> <span class="nc">Some</span><span class="o">(</span><span class="nc">List</span><span class="o">(</span><span class="s">"rate"</span><span class="o">,</span> <span class="s">"buy"</span><span class="o">)),</span> <span class="c1">// read "rate" and "buy" event
+</span>      <span class="c1">// targetEntityType is optional field of an event.
+</span>      <span class="n">targetEntityType</span> <span class="k">=</span> <span class="nc">Some</span><span class="o">(</span><span class="nc">Some</span><span class="o">(</span><span class="s">"item"</span><span class="o">)))(</span><span class="n">sc</span><span class="o">)</span>
+
+</pre></td></tr></tbody></table> </div> </div></div></div></div><footer><div class="container"><div class="seperator"></div><div class="row"><div class="col-md-6 col-xs-6 footer-link-column"><div class="footer-link-column-row"><h4>Community</h4><ul><li><a href="//docs.prediction.io/install/" target="blank">Download</a></li><li><a href="//docs.prediction.io/" target="blank">Docs</a></li><li><a href="//github.com/apache/incubator-predictionio" target="blank">GitHub</a></li><li><a href="mailto:user-subscribe@predictionio.incubator.apache.org" target="blank">Subscribe to User Mailing List</a></li><li><a href="//stackoverflow.com/questions/tagged/predictionio" target="blank">Stackoverflow</a></li></ul></div></div><div class="col-md-6 col-xs-6 footer-link-column"><div class="footer-link-column-row"><h4>Contribute</h4><ul><li><a href="//predictionio.incubator.apache.org/community/contribute-code/" target="blank">Contribute</a></li><li><a href="//github.com/apache/incubator-predictionio" ta
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+<!DOCTYPE html><html><head><title>Collecting Data through REST/SDKs</title><meta charset="utf-8"/><meta content="IE=edge,chrome=1" http-equiv="X-UA-Compatible"/><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta class="swiftype" name="title" data-type="string" content="Collecting Data through REST/SDKs"/><link rel="canonical" href="https://docs.prediction.io/datacollection/eventapi/"/><link href="/images/favicon/normal-b330020a.png" rel="shortcut icon"/><link href="/images/favicon/apple-c0febcf2.png" rel="apple-touch-icon"/><link href="//fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800" rel="stylesheet"/><link href="//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" rel="stylesheet"/><link href="/stylesheets/application-a2a2f408.css" rel="stylesheet" type="text/css"/><script src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.2/html5shiv.min.js"></script><script src="//cdn.ma
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 -of-content-wrapper"><h5>On this page</h5><aside id="table-of-contents"><ul> <li> <a href="#launching-the-event-server">Launching the Event Server</a> </li> <li> <a href="#using-event-api">Using Event API</a> </li> <li> <a href="#note-about-properties">Note About Properties</a> </li> <li> <a href="#debugging-recipes">Debugging Recipes</a> </li> </ul> </aside><hr/><a id="edit-page-link" href="https://github.com/apache/incubator-predictionio/tree/livedoc/docs/manual/source/datacollection/eventapi.html.md"><img src="/images/icons/edit-pencil-d6c1bb3d.png"/>Edit this page</a></div><div class="content-header hidden-sm hidden-xs"><div id="breadcrumbs" class="hidden-sm hidden xs"><ul><li><a href="#">Collecting and Analyzing Data</a><span class="spacer">&gt;</span></li><li><span class="last">Collecting Data with REST/SDKs</span></li></ul></div><div id="page-title"><h1>Collecting Data through REST/SDKs</h1></div></div><div class="content"><p><strong>Event Server</strong> is designed to colle
 ct data into Apache PredictionIO (incubating) in an event-based style. Once the Event Server is launched, your application can send data to it through its <strong>Event API</strong> with HTTP requests or with <code>EventClient</code>s of PredictionIO&#39;s SDKs.</p><div class="alert-message info"><p>All Apache PredictionIO (incubating)-compliant engines support accessing the Event Store (i.e. the data store of Event Server) through <a href="http://docs.prediction.io/api/current/index.html#io.prediction.data.storage.package">Apache PredictionIO (incubating)&#39;s Storage API</a>.</p></div><h2 id='launching-the-event-server' class='header-anchors'>Launching the Event Server</h2><div class="alert-message info"><p>Before launching the Event Server, make sure that your event data store backend is properly configured and is running. By default, Apache PredictionIO (incubating) uses Apache HBase, and a quick configuration can be found <a href="/install/install-linux/#hbase">here</a>. Pleas
 e allow a minute (usually less than 30 seconds) after HBase is started for its initialization to complete before starting the Event Server.</p></div><p>Everything about Apache PredictionIO (incubating) can be done through the <code>pio</code> command. Please add PIO binary command path to to your <code>PATH</code> first. Assuming PredictionIO is installed at <code>/home/yourname/PredictionIO/</code>, you can run</p><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td class="code"><pre><span class="gp">$ </span><span class="nv">PATH</span><span class="o">=</span><span class="nv">$PATH</span>:/home/yourname/PredictionIO/bin; <span class="nb">export </span>PATH
+</pre></td></tr></tbody></table> </div> <p>To start the event server, run</p><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td class="code"><pre><span class="gp">$ </span>pio eventserver
+</pre></td></tr></tbody></table> </div> <div class="alert-message info"><p>By default, the Event Server is bound to 0.0.0.0, which serves global traffic. To tighten security, you may use <code>pio eventserver --ip 127.0.0.1</code> to serve only local traffic.</p></div><h3 id='check-server-status' class='header-anchors'>Check Server Status</h3><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td class="code"><pre><span class="gp">$ </span>curl -i -X GET http://localhost:7070
+</pre></td></tr></tbody></table> </div> <p>Sample response:</p><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1
+2
+3
+4
+5
+6
+7</pre></td><td class="code"><pre>HTTP/1.1 200 OK
+Server: spray-can/1.2.1
+Date: Wed, 10 Sep 2014 22:37:30 GMT
+Content-Type: application/json; <span class="nv">charset</span><span class="o">=</span>UTF-8
+Content-Length: 18
+
+<span class="o">{</span><span class="s2">"status"</span>:<span class="s2">"alive"</span><span class="o">}</span>
+</pre></td></tr></tbody></table> </div> <h3 id='generating-app-id-and-access-key' class='header-anchors'>Generating App ID and Access Key</h3><p>First, you need to create a new app in the Event Server. You will later send data into it.</p><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td class="code"><pre><span class="gp">$ </span>pio app new MyTestApp
+</pre></td></tr></tbody></table> </div> <blockquote> <p>You can replace <code>MyTestApp</code> with name of your App.</p></blockquote> <p>Take note of the <em>Access Key</em> and <em>App ID</em> generated. You need the <em>Access Key</em> to use the Event API. You should see something like the following output:</p><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1
+2
+3
+4</pre></td><td class="code"><pre><span class="o">[</span>INFO] <span class="o">[</span>App<span class="nv">$]</span> Created new app:
+<span class="o">[</span>INFO] <span class="o">[</span>App<span class="nv">$]</span>         Name: MyTestApp
+<span class="o">[</span>INFO] <span class="o">[</span>App<span class="nv">$]</span>           ID: 6
+<span class="o">[</span>INFO] <span class="o">[</span>App<span class="nv">$]</span>   Access Key: WPgcXKd42FPQpZHVbVeMyqF4CQJUnXQmIMTHhX3ZUrSzvy1KXJjdFUrslifa9rnB
+</pre></td></tr></tbody></table> </div> <h3 id='creating-your-first-event' class='header-anchors'>Creating Your First Event</h3><p>You may connect to the Event Server with HTTP request or by using one of many <strong>Apache PredictionIO (incubating) SDKs</strong>.</p><p>For example, the following shows how one can create an event involving a single entity. Replace the value of <code>accessKey</code> by the <em>Access Key</em> generated for your App.</p><div class="tabs"> <ul class="control"> <li data-lang="bash"><a href="#tab-82ef7efd-d9f1-4610-9fd8-38477c23179d">Raw HTTP</a></li> <li data-lang="php"><a href="#tab-188d16ee-bbe9-4221-ae46-2fc7645a6e07">PHP SDK</a></li> <li data-lang="python"><a href="#tab-962b1ee4-8bda-4abd-b5e5-06012041642b">Python SDK</a></li> <li data-lang="ruby"><a href="#tab-8dc67f72-9b07-4b0e-9d13-958acb6e572d">Ruby SDK</a></li> <li data-lang="java"><a href="#tab-a16c7d05-80d7-409d-a172-9cf4a44b32b5">Java SDK</a></li> </ul> <div data-tab="Raw HTTP" data-lang="b
 ash" id="tab-82ef7efd-d9f1-4610-9fd8-38477c23179d"> <div class="highlight shell"> <table style="border-spacing: 0"><tbody><tr> <td class="gutter gl" style="text-align: right"><pre class="lineno">1
+2
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+12
+13
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+15
+16</pre></td> <td class="code"><pre><span class="gp">$ </span>curl -i -X POST http://localhost:7070/events.json?accessKey<span class="o">=</span>WPgcXKd42FPQpZHVbVeMyqF4CQJUnXQmIMTHhX3ZUrSzvy1KXJjdFUrslifa9rnB <span class="se">\</span>
+-H <span class="s2">"Content-Type: application/json"</span> <span class="se">\</span>
+-d <span class="s1">'{
+  "event" : "my_event",
+  "entityType" : "user",
+  "entityId" : "uid",
+  "properties" : {
+    "prop1" : 1,
+    "prop2" : "value2",
+    "prop3" : [1, 2, 3],
+    "prop4" : true,
+    "prop5" : ["a", "b", "c"],
+    "prop6" : 4.56
+  }
+  "eventTime" : "2004-12-13T21:39:45.618-07:00"
+}'</span>
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="PHP SDK" data-lang="php" id="tab-188d16ee-bbe9-4221-ae46-2fc7645a6e07"> <div class="highlight php"> <table style="border-spacing: 0"><tbody><tr> <td class="gutter gl" style="text-align: right"><pre class="lineno">1
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+21</pre></td> <td class="code"><pre><span class="cp">&lt;?php</span>
+  <span class="k">require_once</span><span class="p">(</span><span class="s2">"vendor/autoload.php"</span><span class="p">);</span>
+
+  <span class="k">use</span> <span class="nx">predictionio\EventClient</span><span class="p">;</span>
+
+  <span class="nv">$accessKey</span> <span class="o">=</span> <span class="s1">'YOUR_ACCESS_KEY'</span><span class="p">;</span>
+  <span class="nv">$client</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">EventClient</span><span class="p">(</span><span class="nv">$accessKey</span><span class="p">);</span>
+  <span class="nv">$response</span> <span class="o">=</span> <span class="nv">$client</span><span class="o">-&gt;</span><span class="na">createEvent</span><span class="p">(</span><span class="k">array</span><span class="p">(</span>
+                        <span class="s1">'event'</span> <span class="o">=&gt;</span> <span class="s1">'my_event'</span><span class="p">,</span>
+                        <span class="s1">'entityType'</span> <span class="o">=&gt;</span> <span class="s1">'user'</span><span class="p">,</span>
+                        <span class="s1">'entityId'</span> <span class="o">=&gt;</span> <span class="s1">'uid'</span><span class="p">,</span>
+                        <span class="s1">'properties'</span> <span class="o">=&gt;</span> <span class="k">array</span><span class="p">(</span><span class="s1">'prop1'</span> <span class="o">=&gt;</span> <span class="mi">1</span><span class="p">,</span>
+                                              <span class="s1">'prop2'</span> <span class="o">=&gt;</span> <span class="s1">'value2'</span><span class="p">,</span>
+                                              <span class="s1">'prop3'</span> <span class="o">=&gt;</span> <span class="k">array</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="mi">2</span><span class="p">,</span><span class="mi">3</span><span class="p">),</span>
+                                              <span class="s1">'prop4'</span> <span class="o">=&gt;</span> <span class="kc">true</span><span class="p">,</span>
+                                              <span class="s1">'prop5'</span> <span class="o">=&gt;</span> <span class="k">array</span><span class="p">(</span><span class="s1">'a'</span><span class="p">,</span><span class="s1">'b'</span><span class="p">,</span><span class="s1">'c'</span><span class="p">),</span>
+                                              <span class="s1">'prop6'</span> <span class="o">=&gt;</span> <span class="mf">4.56</span>
+                                        <span class="p">),</span>
+                        <span class="s1">'eventTime'</span> <span class="o">=&gt;</span> <span class="s1">'2004-12-13T21:39:45.618-07:00'</span>
+                       <span class="p">));</span>
+<span class="cp">?&gt;</span>
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Python SDK" data-lang="python" id="tab-962b1ee4-8bda-4abd-b5e5-06012041642b"> <div class="highlight python"> <table style="border-spacing: 0"><tbody><tr> <td class="gutter gl" style="text-align: right"><pre class="lineno">1
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+21
+22</pre></td> <td class="code"><pre><span class="kn">from</span> <span class="nn">predictionio</span> <span class="kn">import</span> <span class="n">EventClient</span>
+<span class="kn">from</span> <span class="nn">datetime</span> <span class="kn">import</span> <span class="n">datetime</span>
+<span class="kn">import</span> <span class="nn">pytz</span>
+<span class="n">client</span> <span class="o">=</span> <span class="n">EventClient</span><span class="p">(</span><span class="s">'YOUR_ACCESS_KEY'</span><span class="p">,</span> <span class="s">"http://localhost:7070"</span><span class="p">)</span>
+
+<span class="n">first_event_properties</span> <span class="o">=</span> <span class="p">{</span>
+    <span class="s">"prop1"</span> <span class="p">:</span> <span class="mi">1</span><span class="p">,</span>
+    <span class="s">"prop2"</span> <span class="p">:</span> <span class="s">"value2"</span><span class="p">,</span>
+    <span class="s">"prop3"</span> <span class="p">:</span> <span class="p">[</span><span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">3</span><span class="p">],</span>
+    <span class="s">"prop4"</span> <span class="p">:</span> <span class="bp">True</span><span class="p">,</span>
+    <span class="s">"prop5"</span> <span class="p">:</span> <span class="p">[</span><span class="s">"a"</span><span class="p">,</span> <span class="s">"b"</span><span class="p">,</span> <span class="s">"c"</span><span class="p">],</span>
+    <span class="s">"prop6"</span> <span class="p">:</span> <span class="mf">4.56</span> <span class="p">,</span>
+    <span class="p">}</span>
+<span class="n">first_event_time</span> <span class="o">=</span> <span class="n">datetime</span><span class="p">(</span>
+  <span class="mi">2004</span><span class="p">,</span> <span class="mi">12</span><span class="p">,</span> <span class="mi">13</span><span class="p">,</span> <span class="mi">21</span><span class="p">,</span> <span class="mi">39</span><span class="p">,</span> <span class="mi">45</span><span class="p">,</span> <span class="mi">618000</span><span class="p">,</span> <span class="n">pytz</span><span class="o">.</span><span class="n">timezone</span><span class="p">(</span><span class="s">'US/Mountain'</span><span class="p">))</span>
+<span class="n">first_event_response</span> <span class="o">=</span> <span class="n">client</span><span class="o">.</span><span class="n">create_event</span><span class="p">(</span>
+    <span class="n">event</span><span class="o">=</span><span class="s">"my_event"</span><span class="p">,</span>
+    <span class="n">entity_type</span><span class="o">=</span><span class="s">"user"</span><span class="p">,</span>
+    <span class="n">entity_id</span><span class="o">=</span><span class="s">"uid"</span><span class="p">,</span>
+    <span class="n">properties</span><span class="o">=</span><span class="n">first_event_properties</span><span class="p">,</span>
+    <span class="n">event_time</span><span class="o">=</span><span class="n">first_event_time</span><span class="p">,</span>
+<span class="p">)</span>
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Ruby SDK" data-lang="ruby" id="tab-8dc67f72-9b07-4b0e-9d13-958acb6e572d"> <div class="highlight ruby"> <table style="border-spacing: 0"><tbody><tr> <td class="gutter gl" style="text-align: right"><pre class="lineno">1
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+10
+11</pre></td> <td class="code"><pre><span class="nb">require</span> <span class="s1">'predictionio'</span>
+
+<span class="n">event_client</span> <span class="o">=</span> <span class="no">PredictionIO</span><span class="o">::</span><span class="no">EventClient</span><span class="p">.</span><span class="nf">new</span><span class="p">(</span><span class="s1">'YOUR_ACCESS_KEY'</span><span class="p">)</span>
+<span class="n">event_client</span><span class="p">.</span><span class="nf">create_event</span><span class="p">(</span><span class="s1">'my_event'</span><span class="p">,</span> <span class="s1">'user'</span><span class="p">,</span> <span class="s1">'uid'</span><span class="p">,</span>
+                          <span class="s1">'eventTime'</span> <span class="o">=&gt;</span> <span class="s1">'2004-12-13T21:39:45.618-07:00'</span><span class="p">,</span>
+                          <span class="s1">'properties'</span> <span class="o">=&gt;</span> <span class="p">{</span> <span class="s1">'prop1'</span> <span class="o">=&gt;</span> <span class="mi">1</span><span class="p">,</span>
+                                            <span class="s1">'prop2'</span> <span class="o">=&gt;</span> <span class="s1">'value2'</span><span class="p">,</span>
+                                            <span class="s1">'prop3'</span> <span class="o">=&gt;</span> <span class="p">[</span><span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">3</span><span class="p">],</span>
+                                            <span class="s1">'prop4'</span> <span class="o">=&gt;</span> <span class="kp">true</span><span class="p">,</span>
+                                            <span class="s1">'prop5'</span> <span class="o">=&gt;</span> <span class="sx">%w(a b c)</span><span class="p">,</span>
+                                            <span class="s1">'prop6'</span> <span class="o">=&gt;</span> <span class="mi">4</span><span class="o">.</span><span class="mi">56</span> <span class="p">})</span>
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Java SDK" data-lang="java" id="tab-a16c7d05-80d7-409d-a172-9cf4a44b32b5"> <div class="highlight java"> <table style="border-spacing: 0"><tbody><tr> <td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td> <td class="code"><pre><span class="o">(</span><span class="n">coming</span> <span class="n">soon</span><span class="o">)</span>
+</pre></td> </tr></tbody></table> </div> </div> </div> <p>For example, the following shows how one can create an event involving two entities (with <code>targetEntity</code>).</p><div class="tabs"> <ul class="control"> <li data-lang="bash"><a href="#tab-e447cdf8-6a36-4ce2-9cb9-d80881dc5f22">Raw HTTP</a></li> <li data-lang="php"><a href="#tab-72d43c0e-d42c-45b4-bbc7-919796f9b585">PHP SDK</a></li> <li data-lang="python"><a href="#tab-1f679c7d-c0d7-4df9-9e4c-6c535d994b3c">Python SDK</a></li> <li data-lang="ruby"><a href="#tab-45858ad8-ed55-4914-9feb-acaf5c85af56">Ruby SDK</a></li> <li data-lang="java"><a href="#tab-14286b01-e365-46fa-b179-861755ae20cd">Java SDK</a></li> </ul> <div data-tab="Raw HTTP" data-lang="bash" id="tab-e447cdf8-6a36-4ce2-9cb9-d80881dc5f22"> <div class="highlight shell"> <table style="border-spacing: 0"><tbody><tr> <td class="gutter gl" style="text-align: right"><pre class="lineno">1
+2
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+4
+5
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+7
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+10
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+12
+13
+14</pre></td> <td class="code"><pre><span class="gp">$ </span>curl -i -X POST http://localhost:7070/events.json?accessKey<span class="o">=</span>WPgcXKd42FPQpZHVbVeMyqF4CQJUnXQmIMTHhX3ZUrSzvy1KXJjdFUrslifa9rnB <span class="se">\</span>
+-H <span class="s2">"Content-Type: application/json"</span> <span class="se">\</span>
+-d <span class="s1">'{
+  "event" : "my_event",
+  "entityType" : "user",
+  "entityId" : "uid",
+  "targetEntityType" : "item",
+  "targetEntityId" : "iid",
+  "properties" : {
+    "someProperty" : "value1",
+    "anotherProperty" : "value2"
+  },
+  "eventTime" : "2004-12-13T21:39:45.618Z"
+}'</span>
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="PHP SDK" data-lang="php" id="tab-72d43c0e-d42c-45b4-bbc7-919796f9b585"> <div class="highlight php"> <table style="border-spacing: 0"><tbody><tr> <td class="gutter gl" style="text-align: right"><pre class="lineno">1
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+15
+16
+17
+18</pre></td> <td class="code"><pre><span class="cp">&lt;?php</span>
+  <span class="k">require_once</span><span class="p">(</span><span class="s2">"vendor/autoload.php"</span><span class="p">);</span>
+
+  <span class="k">use</span> <span class="nx">predictionio\EventClient</span><span class="p">;</span>
+
+  <span class="nv">$accessKey</span> <span class="o">=</span> <span class="s1">'YOUR_ACCESS_KEY'</span><span class="p">;</span>
+  <span class="nv">$client</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">EventClient</span><span class="p">(</span><span class="nv">$accessKey</span><span class="p">);</span>
+  <span class="nv">$response</span> <span class="o">=</span> <span class="nv">$client</span><span class="o">-&gt;</span><span class="na">createEvent</span><span class="p">(</span><span class="k">array</span><span class="p">(</span>
+                        <span class="s1">'event'</span> <span class="o">=&gt;</span> <span class="s1">'my_event'</span><span class="p">,</span>
+                        <span class="s1">'entityType'</span> <span class="o">=&gt;</span> <span class="s1">'user'</span><span class="p">,</span>
+                        <span class="s1">'entityId'</span> <span class="o">=&gt;</span> <span class="s1">'uid'</span><span class="p">,</span>
+                        <span class="s1">'targetEntityType'</span> <span class="o">=&gt;</span> <span class="s1">'item'</span><span class="p">,</span>
+                        <span class="s1">'targetEntityId'</span> <span class="o">=&gt;</span> <span class="s1">'iid'</span><span class="p">,</span>
+                        <span class="s1">'properties'</span> <span class="o">=&gt;</span> <span class="k">array</span><span class="p">(</span><span class="s1">'someProperty'</span><span class="o">=&gt;</span><span class="s1">'value1'</span><span class="p">,</span>
+                                              <span class="s1">'anotherProperty'</span><span class="o">=&gt;</span><span class="s1">'value2'</span><span class="p">),</span>
+                        <span class="s1">'eventTime'</span> <span class="o">=&gt;</span> <span class="s1">'2004-12-13T21:39:45.618Z'</span>
+                       <span class="p">));</span>
+<span class="cp">?&gt;</span>
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Python SDK" data-lang="python" id="tab-1f679c7d-c0d7-4df9-9e4c-6c535d994b3c"> <div class="highlight python"> <table style="border-spacing: 0"><tbody><tr> <td class="gutter gl" style="text-align: right"><pre class="lineno">1
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+8
+9
+10
+11
+12
+13</pre></td> <td class="code"><pre><span class="c"># Second Event</span>
+<span class="n">second_event_properties</span> <span class="o">=</span> <span class="p">{</span>
+    <span class="s">"someProperty"</span> <span class="p">:</span> <span class="s">"value1"</span><span class="p">,</span>
+    <span class="s">"anotherProperty"</span> <span class="p">:</span> <span class="s">"value2"</span><span class="p">,</span>
+    <span class="p">}</span>
+<span class="n">second_event_response</span> <span class="o">=</span> <span class="n">client</span><span class="o">.</span><span class="n">create_event</span><span class="p">(</span>
+    <span class="n">event</span><span class="o">=</span><span class="s">"my_event"</span><span class="p">,</span>
+    <span class="n">entity_type</span><span class="o">=</span><span class="s">"user"</span><span class="p">,</span>
+    <span class="n">entity_id</span><span class="o">=</span><span class="s">"uid"</span><span class="p">,</span>
+    <span class="n">target_entity_type</span><span class="o">=</span><span class="s">"item"</span><span class="p">,</span>
+    <span class="n">target_entity_id</span><span class="o">=</span><span class="s">"iid"</span><span class="p">,</span>
+    <span class="n">properties</span><span class="o">=</span><span class="n">second_event_properties</span><span class="p">,</span>
+    <span class="n">event_time</span><span class="o">=</span><span class="n">datetime</span><span class="p">(</span><span class="mi">2014</span><span class="p">,</span> <span class="mi">12</span><span class="p">,</span> <span class="mi">13</span><span class="p">,</span> <span class="mi">21</span><span class="p">,</span> <span class="mi">38</span><span class="p">,</span> <span class="mi">45</span><span class="p">,</span> <span class="mi">618000</span><span class="p">,</span> <span class="n">pytz</span><span class="o">.</span><span class="n">utc</span><span class="p">))</span>
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Ruby SDK" data-lang="ruby" id="tab-45858ad8-ed55-4914-9feb-acaf5c85af56"> <div class="highlight ruby"> <table style="border-spacing: 0"><tbody><tr> <td class="gutter gl" style="text-align: right"><pre class="lineno">1
+2
+3
+4
+5
+6
+7
+8
+9</pre></td> <td class="code"><pre><span class="nb">require</span> <span class="s1">'predictionio'</span>
+
+<span class="n">event_client</span> <span class="o">=</span> <span class="no">PredictionIO</span><span class="o">::</span><span class="no">EventClient</span><span class="p">.</span><span class="nf">new</span><span class="p">(</span><span class="s1">'YOUR_ACCESS_KEY'</span><span class="p">)</span>
+<span class="n">event_client</span><span class="p">.</span><span class="nf">create_event</span><span class="p">(</span><span class="s1">'my_event'</span><span class="p">,</span> <span class="s1">'user'</span><span class="p">,</span> <span class="s1">'uid'</span><span class="p">,</span>
+                          <span class="s1">'targetEntityType'</span> <span class="o">=&gt;</span> <span class="s1">'item'</span><span class="p">,</span>
+                          <span class="s1">'targetEntityId'</span> <span class="o">=&gt;</span> <span class="s1">'iid'</span><span class="p">,</span>
+                          <span class="s1">'eventTime'</span> <span class="o">=&gt;</span> <span class="s1">'2004-12-13T21:39:45.618Z'</span><span class="p">,</span>
+                          <span class="s1">'properties'</span> <span class="o">=&gt;</span> <span class="p">{</span> <span class="s1">'someProperty'</span> <span class="o">=&gt;</span> <span class="s1">'value1'</span><span class="p">,</span>
+                                            <span class="s1">'anotherProperty'</span> <span class="o">=&gt;</span> <span class="s1">'value2'</span> <span class="p">})</span>
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Java SDK" data-lang="java" id="tab-14286b01-e365-46fa-b179-861755ae20cd"> <div class="highlight java"> <table style="border-spacing: 0"><tbody><tr> <td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td> <td class="code"><pre><span class="o">(</span><span class="n">coming</span> <span class="n">soon</span><span class="o">)</span>
+</pre></td> </tr></tbody></table> </div> </div> </div> <p>Sample response:</p><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1
+2
+3
+4
+5
+6
+7</pre></td><td class="code"><pre>HTTP/1.1 201 Created
+Server: spray-can/1.2.1
+Date: Wed, 10 Sep 2014 22:51:33 GMT
+Content-Type: application/json; <span class="nv">charset</span><span class="o">=</span>UTF-8
+Content-Length: 41
+
+<span class="o">{</span><span class="s2">"eventId"</span>:<span class="s2">"AAAABAAAAQDP3-jSlTMGVu0waj8"</span><span class="o">}</span>
+</pre></td></tr></tbody></table> </div> <h2 id='using-event-api' class='header-anchors'>Using Event API</h2><h3 id='event-creation-api' class='header-anchors'>Event Creation API</h3><p>URL: <code>http://localhost:7070/events.json?accessKey=yourAccessKeyString</code></p><p>Query parameters:</p> <table><thead> <tr> <th style="text-align: left">Field</th> <th style="text-align: left">Type</th> <th style="text-align: left">Description</th> </tr> </thead><tbody> <tr> <td style="text-align: left"><code>accessKey</code></td> <td style="text-align: left">String</td> <td style="text-align: left">The Access Key for your App</td> </tr> </tbody></table> <p>The event creation support many commonly used data. POST request body:</p> <table><thead> <tr> <th style="text-align: left">Field</th> <th style="text-align: left">Type</th> <th style="text-align: left">Description</th> </tr> </thead><tbody> <tr> <td style="text-align: left"><code>event</code></td> <td style="text-align: left">String</td> <td
  style="text-align: left">Name of the event.</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left">(Examples: &quot;sign-up&quot;, &quot;rate&quot;, &quot;view&quot;, &quot;buy&quot;).</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left"><strong>Note</strong>: All event names start with &quot;$&quot; and &quot;pio_&quot; are reserved</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left">and shouldn&#39;t be used as your custom event name (eg. &quot;$set&quot;).</td> </tr> <tr> <td style="text-align: left"><code>entityType</code></td> <td style="text-align: left">String</td> <td style="text-align: left">The entity type. It is the namespace of the entityId and</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left">analogous to the table name of 
 a relational database. The</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left">entityId must be unique within same entityType.</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left"><strong>Note</strong>: All entityType names start with &quot;$&quot; and &quot;pio_&quot; are</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left">reserved and shouldn&#39;t be used.</td> </tr> <tr> <td style="text-align: left"><code>entityId</code></td> <td style="text-align: left">String</td> <td style="text-align: left">The entity ID. <code>entityType-entityId</code> becomes the unique</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left">identifier of the entity. For example, you may have entityType</td> </tr> <tr> <td style="text-align: left"></td> <td style
 ="text-align: left"></td> <td style="text-align: left">named <code>user</code>, and different entity IDs, say <code>1</code> and <code>2</code>. In this</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left">case, <code>user-1</code> and <code>user-2</code> uniquely identifies</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left">entities.</td> </tr> <tr> <td style="text-align: left"><code>targetEntityType</code></td> <td style="text-align: left">String</td> <td style="text-align: left">(Optional) The target entity type.</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left"><strong>Note</strong>: All entityType names start with &quot;$&quot; and &quot;pio_&quot;</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left">are reserved and shouldn&#39;
 t be used.</td> </tr> <tr> <td style="text-align: left"><code>targetEntityId</code></td> <td style="text-align: left">String</td> <td style="text-align: left">(Optional) The target entity ID.</td> </tr> <tr> <td style="text-align: left"><code>properties</code></td> <td style="text-align: left">JSON</td> <td style="text-align: left">(Optional) See <strong>Note About Properties</strong> below</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left"><strong>Note</strong>: All peroperty names start with &quot;$&quot; and &quot;pio_&quot;</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left">are reserved and shouldn&#39;t be used as keys inside <code>properties</code>.</td> </tr> <tr> <td style="text-align: left"><code>eventTime</code></td> <td style="text-align: left">String</td> <td style="text-align: left">(Optional) The time of the event. Although Event Server&#39;s<
 /td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left">current system time and UTC timezone will be used if this is</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left">unspecified, it is highly recommended that this time should be</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left">generated by the client application in order to accurately</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left">record the time of the event.</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left">Must be in ISO 8601 format (e.g.</td> </tr> <tr> <td style="text-align: left"></td> <td style="text-align: left"></td> <td style="text-align: left"><code>2004-12-13T21:39:45.618Z</code>, or <code>2014-09-09T16
 :17:42.937-08:00</code>).</td> </tr> </tbody></table> <h2 id='note-about-properties' class='header-anchors'>Note About Properties</h2><p>Note that <code>properties</code> can be:</p> <ol> <li>Associated with an <em>generic event</em>: The <code>properties</code> field provide additional information about this event</li> <li>Associated with an <em>entity</em>: The <code>properties</code> field is used to record the changes of an entity&#39;s properties with special events <code>$set</code>, <code>$unset</code> and <code>$delete</code>.</li> </ol> <p>Please see the <a href="/datacollection/eventmodel/">Events Modeling</a> for detailed explanation.</p><h2 id='debugging-recipes' class='header-anchors'>Debugging Recipes</h2><div class="alert-message warning"><p>The following API are mainly for development or debugging purpose only. They should not be supported by SDK nor used by real application under normal circumstances and they are subject to changes.</p></div><div class="alert-messag
 e info"><p>Instead of using <code>curl</code>, you can also install JSON browser plugins such as <strong>JSONView</strong> to pretty-print the JSON on your browser. With the browser plugin you can make the <code>GET</code> queries below by passing in the URL. Plugins like <strong>Postman - REST Client</strong> provide a more advanced interface for making queries.</p></div><p>The <code>accessKey</code> query parameter is mandatory.</p><p>Replace <code>&lt;your_accessKey&gt;</code> and <code>&lt;your_eventId&gt;</code> by a real one in the following:</p><h3 id='get-an-event' class='header-anchors'>Get an Event</h3><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td class="code"><pre><span class="gp">$ </span>curl -i -X GET http://localhost:7070/events/&lt;your_eventId&gt;.json?accessKey<span class="o">=</span>&lt;your_accessKey&gt;
+</pre></td></tr></tbody></table> </div> <h3 id='delete-an-event' class='header-anchors'>Delete an Event</h3><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td class="code"><pre><span class="gp">$ </span>curl -i -X DELETE http://localhost:7070/events/&lt;your_eventId&gt;.json?accessKey<span class="o">=</span>&lt;your_accessKey&gt;
+</pre></td></tr></tbody></table> </div> <h3 id='get-events-of-an-app' class='header-anchors'>Get Events of an App</h3><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td class="code"><pre><span class="gp">$ </span>curl -i -X GET http://localhost:7070/events.json?accessKey<span class="o">=</span>&lt;your_accessKey&gt;
+</pre></td></tr></tbody></table> </div> <div class="alert-message info"><p>By default, it returns at most 20 events. Use the <code>limit</code> parameter to specify how many events returned (see below). Use cautiously!</p></div><p>In addition, the following <em>optional</em> parameters are supported:</p> <ul> <li><code>startTime</code>: time in ISO8601 format. Return events with <code>eventTime &gt;= startTime</code>.</li> <li><code>untilTime</code>: time in ISO8601 format. Return events with <code>eventTime &lt; untilTime</code>.</li> <li><code>entityType</code>: String. The entityType. Return events for this <code>entityType</code> only.</li> <li><code>entityId</code>: String. The entityId. Return events for this <code>entityId</code> only.</li> <li><code>event</code>: String. The event name. Return events with this name only.</li> <li><code>targetEntityType</code>: String. The targetEntityType. Return events for this <code>targetEntityType</code> only.</li> <li><code>targetEntity
 Id</code>: String. The targetEntityId. Return events for this <code>targetEntityId</code> only.</li> <li><code>limit</code>: Integer. The number of record events returned. Default is 20. -1 to get all.</li> <li><code>reversed</code>: Boolean. <strong>Must be used with both <code>entityType</code> and <code>entityId</code> specified</strong>, returns events in reversed chronological order. Default is false.</li> </ul> <div class="alert-message warning"><p>If you are using <code>curl</code> with the <code>&amp;</code> symbol, you should quote the entire URL by using single or double quotes.</p></div><div class="alert-message warning"><p>Depending on the size of data, you may encounter timeout when querying with some of the above filters. Event server uses <code>entityType</code> and <code>entityId</code> as the key so any query without both <code>entityType</code> and <code>entityId</code> specified might result in a timeout.</p></div><p>For example, get all events of an app with <cod
 e>eventTime &gt;= startTime</code></p><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td class="code"><pre><span class="gp">$ </span>curl -i -X GET <span class="s2">"http://localhost:7070/events.json?accessKey=&lt;your_accessKey&gt;&amp;startTime=&lt;time in ISO8601 format&gt;"</span>
+</pre></td></tr></tbody></table> </div> <p>For example, get all events of an app with <code>eventTime &lt; untilTime</code>:</p><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td class="code"><pre><span class="gp">$ </span>curl -i -X GET <span class="s2">"http://localhost:7070/events.json?accessKey=&lt;your_accessKey&gt;&amp;untilTime=&lt;time in ISO8601 format&gt;"</span>
+</pre></td></tr></tbody></table> </div> <p>For example, get all events of an app with <code>eventTime &gt;= startTime</code> and <code>eventTime &lt; untilTime</code>:</p><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td class="code"><pre><span class="gp">$ </span>curl -i -X GET <span class="s2">"http://localhost:7070/events.json?accessKey=&lt;your_accessKey&gt;&amp;startTime=&lt;time in ISO8601 format&gt;&amp;untilTime=&lt;time in ISO8601 format&gt;"</span>
+</pre></td></tr></tbody></table> </div> <p>For example, get all events of a specific entity with <code>eventTime &lt; untilTime</code>:</p><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td class="code"><pre><span class="gp">$ </span>curl -i -X GET <span class="s2">"http://localhost:7070/events.json?accessKey=&lt;your_accessKey&gt;&amp;entityType=&lt;your_entityType&gt;&amp;entityId=&lt;your_entityId&gt;&amp;untilTime=&lt;time in ISO801 format&gt;"</span>
+</pre></td></tr></tbody></table> </div> <h3 id='delete-all-events-of-an-app' class='header-anchors'>Delete All Events of an App</h3><p>Please use the following CLI command:</p><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td class="code"><pre><span class="gp">$ </span>pio app data-delete &lt;your_app_name&gt;
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