http://git-wip-us.apache.org/repos/asf/incubator-predictionio-site/blob/452034c1/datacollection/eventmodel/index.html ---------------------------------------------------------------------- diff --git a/datacollection/eventmodel/index.html b/datacollection/eventmodel/index.html index c94f1b7..05285b1 100644 --- a/datacollection/eventmodel/index.html +++ b/datacollection/eventmodel/index.html @@ -1,4 +1,4 @@ -<!DOCTYPE html><html><head><title>Events Modeling</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="Events Modeling"/><link rel="canonical" href="https://predictionio.incubator.apache.org/datacollection/eventmodel/"/><link href="/images/favicon/normal-b330020a.png" rel="shortcut icon"/><link href="/images/favicon/apple-c0febcf2.png" rel="apple-touch-icon"/><link 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href="/templates/classification/add-algorithm/"><span>Use Alternative Algorithm</span></a></li><li class="level-3"><a class="final" href="/templates/classification/reading-custom-properties/"><span>Read Custom Properties</span></a></li></ul></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 Contributed Demo</span></a></li><li class="level-2"><a class="final" href="/demo/textclassification/"><span>Text Classification Engine 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href="https://www.apache.org/foundation/sponsorship.html";><span>Sponsorship</span></a></li><li class="level-2"><a class="final" href="https://www.apache.org/foundation/thanks.html";><span>Thanks</span></a></li><li class="level-2"><a class="final" href="https://www.apache.org/security/";><span>Security</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">></span></li><li><span class="last">Events Modeling</span></li></ul></div><div id="page-title"><h1>Events Modeling</h1></div> </div><div id="table-of-content-wrapper"><h5>On this page</h5><aside id="table-of-contents"><ul> <li> <a href="#1-generic-events-performed-by-an-entity">1. Generic events performed by an entity</a> </li> <li> <a href="#2-special-events-for-recording-changes-of-an-entity-s-properties">2. Special events for recording changes of an entity's properties</a> </li> <li> <a href="#3-batch-events-to-the-eventserver">3. Batch Events to the EventServer</a> </li> </ul> </aside><hr/><a id="edit-page-link" href="https://github.com/apache/incubator-predictionio/tree/livedoc/docs/manual/source/datacollection/eventmodel.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">></span></li><li><span class="last">Events Modeling</span></li></ul></div><div id="page-title"><h1>Events Modeling</h1></di v></div><div class="content"> <p>This section explains how to model your application data as events.</p><p><strong>Entity</strong>: it's the real world object involved in the events. The entity may perform the events, or interact with other entity (which became <code>targetEntity</code> in an event).</p><p>For example, your application may have users and some items which the user can interact with. Then you can model them as two entity types: <strong>user</strong> and <strong>item</strong> and the entityId can uniquely identify the entity within each entityType (e.g. user with ID 1, item with ID 1).</p><p>An entity may peform some events (e.g user 1 does something), and entity may have properties associated with it (e.g. user may have gender, age, email etc). Hence, <strong>events</strong> involve <strong>entities</strong> and there are three types of events, respectively:</p> <ol> <li>Generic events performed by an entity.</li> <li>Special events for recording changes of an ent ity's properties</li> <li>Batch events</li> </ol> <p>They are explained in details below.</p><h2 id='1.-generic-events-performed-by-an-entity' class='header-anchors'>1. Generic events performed by an entity</h2><p>Whenever the entity performs an action, you can describe such event as <code>entity "verb" targetEntity with "some extra information"</code>. The <em>"targetEntity"</em> and <em>"some extra information"</em> can be optional. The <em>"verb"</em> can be used as the name of the <em>"event"</em>. The <em>"some extra information"</em> can be recorded as <code>properties</code> of the event.</p><p>The following are some simple examples:</p> <ul> <li>user-1 signs-up</li> </ul> <div class="highlight json"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1 +<!DOCTYPE html><html><head><title>Events Modeling</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="Events Modeling"/><link rel="canonical" href="https://predictionio.apache.org/datacollection/eventmodel/"/><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-eccfc6cb.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/Math Jax.js?config=TeX-AMS-MML_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.apache.org/";><img alt="Apache PredictionIO" id="logo" src="/images/logos/logo-ee2b9bb3.png"/></a><span>â¢</span></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 clas s="hidden-md hidden-lg" id="mobile-page-heading-wrapper"><p>PredictionIO Docs</p><h4>Events Modeling</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-m d-3"><nav id="nav-main"><ul><li class="level-1"><a class="expandible" href="/"><span>Apache PredictionIO⢠Documentation</span></a><ul><li class="level-2"><a class="final" href="/"><span>Welcome to Apache PredictionIO</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</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" hr ef="/appintegration/"><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="/batchpredict/"><span>Batch Predictions</span></a></li><li class="level-2"><a class="final" href="/deploy/monitoring/"><span>Monit oring 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><li class="level-2"><a class="final" href="/deploy/plugin/"><span>Engine Server Plugin</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 Overview</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 active" >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" >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><li class="level-2"><a class="final" >href="/datacollection/plugin/"><span>Event Server >Plugin</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="/algorithm/"><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 Me trics</span></a></li><li class="level-2"><a class="final" href="/evaluation/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" 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>href="/templates/classification/reading-custom-properties/"><span>Read Custom >Properties</span></a></li></ul></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 Tutorial s</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 Contributed 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/"><sp an>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="/cli/"><span>Command-line Interface</span></a></li><li class="level-2"><a class="final" href="/resources/release/"><span>Release Cadence</span></a></li><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><li class="level-1"><a class="expandible" href="#"><span>Apache Software Fou ndation</span></a><ul><li class="level-2"><a class="final" href="https://www.apache.org/";><span>Apache Homepage</span></a></li><li class="level-2"><a class="final" href="https://www.apache.org/licenses/";><span>License</span></a></li><li class="level-2"><a class="final" href="https://www.apache.org/foundation/sponsorship.html";><span>Sponsorship</span></a></li><li class="level-2"><a class="final" href="https://www.apache.org/foundation/thanks.html";><span>Thanks</span></a></li><li class="level-2"><a class="final" href="https://www.apache.org/security/";><span>Security</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">></span></li><li><span class="last">Events Modeling</span></li></ul></div><div id="page-title"><h1>Events Modeling</h1></div></div><div id="table-of-content-wrapper"><h5>On this page</h5><aside id="table-of-contents"><ul> <li> <a href="#1-generic-events-performed-by-an-entity">1. Generic events performed by an entity</a> </li> <li> <a href="#2-special-events-for-recording-changes-of-an-entity-s-properties">2. Special events for recording changes of an entity's properties</a> </li> <li> <a href="#3-batch-events-to-the-eventserver">3. Batch Events to the EventServer</a> </li> </ul> </aside><hr/><a id="edit-page-link" href="https://github.com/apache/incubator-predictionio/tree/livedoc/docs/manual/source/datacollection/eventmodel.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">></span></li><li><span class="last">Events Modeling</span></li></ul></div><div id="page-title"><h1>Events Modeling</h1></div></div><div class="content"> <p>This section explai ns how to model your application data as events.</p><p><strong>Entity</strong>: it's the real world object involved in the events. The entity may perform the events, or interact with other entity (which became <code>targetEntity</code> in an event).</p><p>For example, your application may have users and some items which the user can interact with. Then you can model them as two entity types: <strong>user</strong> and <strong>item</strong> and the entityId can uniquely identify the entity within each entityType (e.g. user with ID 1, item with ID 1).</p><p>An entity may peform some events (e.g user 1 does something), and entity may have properties associated with it (e.g. user may have gender, age, email etc). Hence, <strong>events</strong> involve <strong>entities</strong> and there are three types of events, respectively:</p> <ol> <li>Generic events performed by an entity.</li> <li>Special events for recording changes of an entity's properties</li> <li>Batch events</li> </ol > <p>They are explained in details below.</p><h2 > id='1.-generic-events-performed-by-an-entity' class='header-anchors'>1. > Generic events performed by an entity</h2><p>Whenever the entity performs an > action, you can describe such event as <code>entity "verb" > targetEntity with "some extra information"</code>. The > <em>"targetEntity"</em> and <em>"some extra > information"</em> can be optional. The <em>"verb"</em> can be > used as the name of the <em>"event"</em>. The <em>"some extra > information"</em> can be recorded as <code>properties</code> of the > event.</p><p>The following are some simple examples:</p> <ul> <li>user-1 > signs-up</li> </ul> <div class="highlight json"><table > style="border-spacing: 0"><tbody><tr><td class="gutter gl" > style="text-align: right"><pre class="lineno">1 2 3 4 @@ -56,7 +56,7 @@ </span><span class="s2">"address"</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="s2">"1234 Street, San Francisco, CA 94107"</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="p">}</span><span class="w"> -</span></pre></td></tr></tbody></table> </div> <p><strong>Note</strong> that the properties values of the entity will be aggregated based on these special events and the eventTime. The state of the entity is different depending on the time you are looking at the data. In engine's DataSource, you can use <a href="https://predictionio.incubator.apache.org/api/current/#org.apache.predictionio.data.store.PEventStore$";>PEventStore.aggregateProperties() API</a> to retrieve the state of entity's properties (based on time).</p><div class="alert-message note"><p>Although it doesn't hurt to import duplicated special events for an entity (exactly same properties) into event server (it just means that the entity changes to the same state as before and new duplicated event provides no new information about the user), it could waste storage space.</p></div><p>To demonstrate the concept of these special events, we are going to import a sequence of events and see how it affects the retr ieved entitiy's properties.</p><p>Assuming you have created the App (named "MyTestApp") for testing and Event Server is started.</p><h4 id='event-1' class='header-anchors'>Event 1</h4><p>For example, on <code>2014-09-09T...</code>, a user with ID "2" is newly added in your application. Also, this user has properties a = 3 and b = 4. To record such event, we can create a <code>$set</code> event for the user.</p><p>for convenience, assign the ACCESS_KEY of your test app to the shell variable <code>ACCESS_KEY</code> and run following curl command to import the event:</p><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1 +</span></pre></td></tr></tbody></table> </div> <p><strong>Note</strong> that the properties values of the entity will be aggregated based on these special events and the eventTime. The state of the entity is different depending on the time you are looking at the data. In engine's DataSource, you can use <a href="https://predictionio.apache.org/api/current/#org.apache.predictionio.data.store.PEventStore$";>PEventStore.aggregateProperties() API</a> to retrieve the state of entity's properties (based on time).</p><div class="alert-message note"><p>Although it doesn't hurt to import duplicated special events for an entity (exactly same properties) into event server (it just means that the entity changes to the same state as before and new duplicated event provides no new information about the user), it could waste storage space.</p></div><p>To demonstrate the concept of these special events, we are going to import a sequence of events and see how it affects the retrieved enti tiy's properties.</p><p>Assuming you have created the App (named "MyTestApp") for testing and Event Server is started.</p><h4 id='event-1' class='header-anchors'>Event 1</h4><p>For example, on <code>2014-09-09T...</code>, a user with ID "2" is newly added in your application. Also, this user has properties a = 3 and b = 4. To record such event, we can create a <code>$set</code> event for the user.</p><p>for convenience, assign the ACCESS_KEY of your test app to the shell variable <code>ACCESS_KEY</code> and run following curl command to import the event:</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 @@ -171,7 +171,7 @@ Content-Length: 57 "eventTime" : "2014-09-13T16:17:42.143-08:00" }'</span> </pre></td></tr></tbody></table> </div> <p>After this eventTime, user-2 is created again with empty properties.</p><p>Note that all above events are recorded in Event Store. Let's query Event Server and see if these events are imported.</p><p>Go to following URL with your browser:</p><p><code>http://localhost:7070/events.json?accessKey=<YOUR_ACCESS_KEY></code></p><p>or run the following command in terminal:</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=</span><span class="nv">$ACCESS_KEY</span><span class="s2">"</span> -</pre></td></tr></tbody></table> </div> <div class="alert-message note"><p>Note that you should quote the entire URL by using single or double quotes when you run the curl command.</p></div><p>You should see all events being created for this user-2.</p><p>Now, let's retrieve the user-2's properties using the <a href="https://predictionio.incubator.apache.org/api/current/#org.apache.predictionio.data.store.PEventStore$";>PEventStore API</a>.</p><p>First, start <code>pio-shell</code> by running:</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-shell --with-spark +</pre></td></tr></tbody></table> </div> <div class="alert-message note"><p>Note that you should quote the entire URL by using single or double quotes when you run the curl command.</p></div><p>You should see all events being created for this user-2.</p><p>Now, let's retrieve the user-2's properties using the <a href="https://predictionio.apache.org/api/current/#org.apache.predictionio.data.store.PEventStore$";>PEventStore API</a>.</p><p>First, start <code>pio-shell</code> by running:</p><div class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td class="code"><pre><span class="gp">$ </span>pio-shell --with-spark </pre></td></tr></tbody></table> </div> <p>You should see the following output and shell prompt:</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 @@ -287,7 +287,7 @@ Content-Length: 41 }, ⦠] -</span></pre></td></tr></tbody></table> </div> <p>Notice that each subrequest receives a status response. The limit of 50 events per batch requests is in line with Facebook, Mixpanel, SegmentIO and other event syncs that accept batches.</p></div></div></div></div><footer><div class="container"><div class="seperator"></div><div class="row"><div class="col-md-6 footer-link-column"><div class="footer-link-column-row"><h4>Community</h4><ul><li><a href="//predictionio.incubator.apache.org/install/" target="blank">Download</a></li><li><a href="//predictionio.incubator.apache.org/" target="blank">Docs</a></li><li><a href="//github.com/apache/incubator-predictionio" target="blank">GitHub</a></li><li><a href="mailto:[email protected]"; 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 footer-link-column"><div class="foote r-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" target="blank">Source Code</a></li><li><a href="//issues.apache.org/jira/browse/PIO" target="blank">Bug Tracker</a></li><li><a href="mailto:[email protected]"; target="blank">Subscribe to Development Mailing List</a></li></ul></div></div></div><div class="row"><div class="col-md-12 footer-link-column"><p>Apache PredictionIO, PredictionIO, Apache, the Apache feather logo, and the Apache PredictionIO project logo are either registered trademarks or trademarks of The Apache Software Foundation in the United States and other countries.</p><p>All other marks mentioned may be trademarks or registered trademarks of their respective owners.</p></div></div><div class="row"><div class="col-md-12 footer-link-column"><a class="pull-right" href="http://incubato r.apache.org/projects/predictionio.html"><img alt="Apache Incubator" src="/images/logos/apache_incubator-6954bd16.png"/></a><span>Apache PredictionIO is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. 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