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-<!DOCTYPE html><html><head><title>Quick Start - E-Commerce Recommendation 
Engine Template</title><meta charset="utf-8"/><meta content="IE=edge,chrome=1" 
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 "><span>Event Server Plugin</span></a></li></ul></li><li class="level-1"><a 
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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>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 Dashboa
 rd</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="/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" href="#"><span>PredictionIO® Official 
Templates</span></a><ul><li class="level-2"><a class="final" 
href="/templates/"><span>Intro</span></a></li><li class="level-2"><a 
class="expandible" href="#"><span>Recommendation</span></a><ul><li 
class="level-3"><a class="final" 
href="/templates/recommendation/quickstart/"><span>Quick 
Start</span></a></li><li class="level-3"><a class="
 final" href="/templates/recommendation/dase/"><span>DASE</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/recommendation/evaluation/"><span>Evaluation 
Explained</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/how-to/"><span>How-To</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/recommendation/reading-custom-events/"><span>Read Custom 
Events</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/customize-data-prep/"><span>Customize Data 
Preparator</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/customize-serving/"><span>Customize 
Serving</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/training-with-implicit-preference/"><span>Train 
with Implicit Preference</span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/blacklist-items/"><span>Filter Recommended 
Items by Blacklist in Query
 </span></a></li><li class="level-3"><a class="final" 
href="/templates/recommendation/batch-evaluator/"><span>Batch Persistable 
Evaluator</span></a></li></ul></li><li class="level-2"><a class="expandible" 
href="#"><span>E-Commerce Recommendation</span></a><ul><li class="level-3"><a 
class="final active" 
href="/templates/ecommercerecommendation/quickstart/"><span>Quick 
Start</span></a></li><li class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/dase/"><span>DASE</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/how-to/"><span>How-To</span></a></li><li
 class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/train-with-rate-event/"><span>Train 
with Rate Event</span></a></li><li class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/adjust-score/"><span>Adjust 
Score</span></a></li></ul></li><li class="level-2"><a class="expandible" 
href="#"><span>Similar Product</span></a><ul><li class="l
 evel-3"><a class="final" 
href="/templates/similarproduct/quickstart/"><span>Quick 
Start</span></a></li><li class="level-3"><a class="final" 
href="/templates/similarproduct/dase/"><span>DASE</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/similarproduct/how-to/"><span>How-To</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/similarproduct/multi-events-multi-algos/"><span>Multiple 
Events and Multiple Algorithms</span></a></li><li class="level-3"><a 
class="final" 
href="/templates/similarproduct/return-item-properties/"><span>Returns Item 
Properties</span></a></li><li class="level-3"><a class="final" 
href="/templates/similarproduct/train-with-rate-event/"><span>Train with Rate 
Event</span></a></li><li class="level-3"><a class="final" 
href="/templates/similarproduct/rid-user-set-event/"><span>Get Rid of Events 
for Users</span></a></li><li class="level-3"><a class="final" 
href="/templates/similarproduct/recommended-user/"><span>Recommend Users</span
 ></a></li></ul></li><li class="level-2"><a class="expandible" 
 >href="#"><span>Classification</span></a><ul><li class="level-3"><a 
 >class="final" href="/templates/classification/quickstart/"><span>Quick 
 >Start</span></a></li><li class="level-3"><a class="final" 
 >href="/templates/classification/dase/"><span>DASE</span></a></li><li 
 >class="level-3"><a class="final" 
 >href="/templates/classification/how-to/"><span>How-To</span></a></li><li 
 >class="level-3"><a class="final" 
 >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>Sub
 mit 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 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/contri
 bute-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="/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/gl
 ossary/"><span>Glossary</span></a></li></ul></li><li class="level-1"><a 
class="expandible" href="#"><span>Apache Software Foundation</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="#">PredictionIO® Official Templates</a><span 
class="spacer">&gt;</span></li><li><a href="#">E-Commerce Recommen
 dation</a><span class="spacer">&gt;</span></li><li><span class="last">Quick 
Start</span></li></ul></div><div id="page-title"><h1>Quick Start - E-Commerce 
Recommendation Engine Template</h1></div></div><div 
id="table-of-content-wrapper"><h5>On this page</h5><aside 
id="table-of-contents"><ul> <li> <a href="#overview">Overview</a> </li> <li> <a 
href="#usage">Usage</a> </li> <li> <a href="#1-install-and-run-predictionio">1. 
Install and Run PredictionIO</a> </li> <li> <a 
href="#2-create-a-new-engine-from-an-engine-template">2. Create a new Engine 
from an Engine Template</a> </li> <li> <a 
href="#3-generate-an-app-id-and-access-key">3. Generate an App ID and Access 
Key</a> </li> <li> <a href="#4-collecting-data">4. Collecting Data</a> </li> 
<li> <a href="#5-deploy-the-engine-as-a-service">5. Deploy the Engine as a 
Service</a> </li> <li> <a href="#6-use-the-engine">6. Use the Engine</a> </li> 
<li> <a href="#setting-constraint-unavailableitems">Setting constraint 
"unavailableItems"</a> </li>
  <li> <a href="#advanced-query">Advanced Query</a> </li> </ul> </aside><hr/><a 
id="edit-page-link" 
href="https://github.com/apache/predictionio/tree/livedoc/docs/manual/source/templates/ecommercerecommendation/quickstart.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="#">PredictionIO® Official 
Templates</a><span class="spacer">&gt;</span></li><li><a href="#">E-Commerce 
Recommendation</a><span class="spacer">&gt;</span></li><li><span 
class="last">Quick Start</span></li></ul></div><div id="page-title"><h1>Quick 
Start - E-Commerce Recommendation Engine Template</h1></div></div><div 
class="content"> <h2 id='overview' class='header-anchors'>Overview</h2><p>This 
engine template provides personalized recommendation for e-commerce 
applications with the following features by default:</p> <ul> <li>Exclude 
out-of-stock items</li> <li>Provid
 e recommendation to new users who sign up after the model is trained</li> 
<li>Recommend unseen items only (configurable)</li> <li>Recommend popular items 
if no information about the user is available (added in template version 
v0.4.0)</li> </ul> <div class="alert-message warning"><p>This template requires 
PredictionIO version &gt;= 0.9.0</p></div><h2 id='usage' 
class='header-anchors'>Usage</h2><h3 id='event-data-requirements' 
class='header-anchors'>Event Data Requirements</h3><p>By default, this template 
takes the following data from Event Server:</p> <ul> <li>Users&#39; 
<em>view</em> events</li> <li>Users&#39; <em>buy</em> events</li> 
<li>Items&#39; with <em>categories</em> properties</li> <li>Constraint 
<em>unavailableItems</em> set events</li> </ul> <div class="alert-message 
info"><p>This template can easily be customized to consider more user events 
such as <em>rate</em> and <em>like</em>.</p></div><p>The <em>view</em> events 
are used as Training Data to train the model. The alg
 orithm has a parameter <em>unseenOnly</em>; when this parameter is set to 
true, the engine would recommend unseen items only. You can specify a list of 
events which are considered as <em>seen</em> events with the algorithm 
parameter <em>seenEvents</em>. The default values are <em>view</em> and 
<em>buy</em> events, which means that the engine by default recommends 
un-viewed and un-bought items only. You can also define your own events which 
are considered as <em>seen</em>.</p><p>The constraint <em>unavailableItems</em> 
set events are used to exclude a list of unaviable items (such as out of stock) 
for all users in real time.</p><h3 id='input-query' 
class='header-anchors'>Input Query</h3> <ul> <li>UserID</li> <li>Num of items 
to be recommended</li> <li>List of white-listed item categories (optional)</li> 
<li>List of white-listed ItemIds (optional)</li> <li>List of black-listed 
ItemIds (optional)</li> </ul> <p>The template also supports black-list and 
whitelist. If a whitelist is provi
 ded, the engine will include only those products in the recommendation. 
Likewise, if a blacklist is provided, the engine will exclude those products in 
the recommendation.</p><h3 id='output-predictedresult' 
class='header-anchors'>Output PredictedResult</h3> <ul> <li>A ranked list of 
recommended itemIDs</li> </ul> <h2 id='1.-install-and-run-predictionio' 
class='header-anchors'>1. Install and Run PredictionIO</h2> <p>First you need 
to <a href="/install">install PredictionIO 0.13.0</a> (if you haven&#39;t done 
it).</p><p>Let&#39;s say you have installed PredictionIO at 
<code>/home/yourname/PredictionIO/</code>. For convenience, add 
PredictionIO&#39;s binary command path to your <code>PATH</code>, i.e. 
<code>/home/yourname/PredictionIO/bin</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><span class="nv">PATH</span><span 
class
 ="o">=</span><span class="nv">$PATH</span>:/home/yourname/PredictionIO/bin; 
<span class="nb">export </span>PATH
+<!DOCTYPE html><html><head><title>Quick Start - E-Commerce Recommendation 
Engine Template</title><meta charset="utf-8"/><meta content="IE=edge,chrome=1" 
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Start</span></a></li><li class="level-3"><a class="
 final" href="/templates/recommendation/dase/"><span>DASE</span></a></li><li 
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Explained</span></a></li><li class="level-3"><a class="final" 
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Preparator</span></a></li><li class="level-3"><a class="final" 
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Items by Blacklist in Query
 </span></a></li><li class="level-3"><a class="final" 
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Evaluator</span></a></li></ul></li><li class="level-2"><a class="expandible" 
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class="final active" 
href="/templates/ecommercerecommendation/quickstart/"><span>Quick 
Start</span></a></li><li class="level-3"><a class="final" 
href="/templates/ecommercerecommendation/dase/"><span>DASE</span></a></li><li 
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with Rate Event</span></a></li><li class="level-3"><a class="final" 
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Score</span></a></li></ul></li><li class="level-2"><a class="expandible" 
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 evel-3"><a class="final" 
href="/templates/similarproduct/quickstart/"><span>Quick 
Start</span></a></li><li class="level-3"><a class="final" 
href="/templates/similarproduct/dase/"><span>DASE</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/similarproduct/how-to/"><span>How-To</span></a></li><li 
class="level-3"><a class="final" 
href="/templates/similarproduct/multi-events-multi-algos/"><span>Multiple 
Events and Multiple Algorithms</span></a></li><li class="level-3"><a 
class="final" 
href="/templates/similarproduct/return-item-properties/"><span>Returns Item 
Properties</span></a></li><li class="level-3"><a class="final" 
href="/templates/similarproduct/train-with-rate-event/"><span>Train with Rate 
Event</span></a></li><li class="level-3"><a class="final" 
href="/templates/similarproduct/rid-user-set-event/"><span>Get Rid of Events 
for Users</span></a></li><li class="level-3"><a class="final" 
href="/templates/similarproduct/recommended-user/"><span>Recommend Users</span
 ></a></li></ul></li><li class="level-2"><a class="expandible" 
 >href="#"><span>Classification</span></a><ul><li class="level-3"><a 
 >class="final" href="/templates/classification/quickstart/"><span>Quick 
 >Start</span></a></li><li class="level-3"><a class="final" 
 >href="/templates/classification/dase/"><span>DASE</span></a></li><li 
 >class="level-3"><a class="final" 
 >href="/templates/classification/how-to/"><span>How-To</span></a></li><li 
 >class="level-3"><a class="final" 
 >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>Sub
 mit 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" 
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 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="#">PredictionIO® Official Templates</a><span 
class="spacer">&gt;</span></li><li><a href="#">E-Commerce Recommen
 dation</a><span class="spacer">&gt;</span></li><li><span class="last">Quick 
Start</span></li></ul></div><div id="page-title"><h1>Quick Start - E-Commerce 
Recommendation Engine Template</h1></div></div><div 
id="table-of-content-wrapper"><h5>On this page</h5><aside 
id="table-of-contents"><ul> <li> <a href="#overview">Overview</a> </li> <li> <a 
href="#usage">Usage</a> </li> <li> <a href="#1-install-and-run-predictionio">1. 
Install and Run PredictionIO</a> </li> <li> <a 
href="#2-create-a-new-engine-from-an-engine-template">2. Create a new Engine 
from an Engine Template</a> </li> <li> <a 
href="#3-generate-an-app-id-and-access-key">3. Generate an App ID and Access 
Key</a> </li> <li> <a href="#4-collecting-data">4. Collecting Data</a> </li> 
<li> <a href="#5-deploy-the-engine-as-a-service">5. Deploy the Engine as a 
Service</a> </li> <li> <a href="#6-use-the-engine">6. Use the Engine</a> </li> 
<li> <a href="#setting-constraint-unavailableitems">Setting constraint 
"unavailableItems"</a> </li>
  <li> <a href="#advanced-query">Advanced Query</a> </li> </ul> </aside><hr/><a 
id="edit-page-link" 
href="https://github.com/apache/predictionio/tree/livedoc/docs/manual/source/templates/ecommercerecommendation/quickstart.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="#">PredictionIO® Official 
Templates</a><span class="spacer">&gt;</span></li><li><a href="#">E-Commerce 
Recommendation</a><span class="spacer">&gt;</span></li><li><span 
class="last">Quick Start</span></li></ul></div><div id="page-title"><h1>Quick 
Start - E-Commerce Recommendation Engine Template</h1></div></div><div 
class="content"> <h2 id='overview' class='header-anchors'>Overview</h2><p>This 
engine template provides personalized recommendation for e-commerce 
applications with the following features by default:</p> <ul> <li>Exclude 
out-of-stock items</li> <li>Provid
 e recommendation to new users who sign up after the model is trained</li> 
<li>Recommend unseen items only (configurable)</li> <li>Recommend popular items 
if no information about the user is available (added in template version 
v0.4.0)</li> </ul> <div class="alert-message warning"><p>This template requires 
PredictionIO version &gt;= 0.9.0</p></div><h2 id='usage' 
class='header-anchors'>Usage</h2><h3 id='event-data-requirements' 
class='header-anchors'>Event Data Requirements</h3><p>By default, this template 
takes the following data from Event Server:</p> <ul> <li>Users&#39; 
<em>view</em> events</li> <li>Users&#39; <em>buy</em> events</li> 
<li>Items&#39; with <em>categories</em> properties</li> <li>Constraint 
<em>unavailableItems</em> set events</li> </ul> <div class="alert-message 
info"><p>This template can easily be customized to consider more user events 
such as <em>rate</em> and <em>like</em>.</p></div><p>The <em>view</em> events 
are used as Training Data to train the model. The alg
 orithm has a parameter <em>unseenOnly</em>; when this parameter is set to 
true, the engine would recommend unseen items only. You can specify a list of 
events which are considered as <em>seen</em> events with the algorithm 
parameter <em>seenEvents</em>. The default values are <em>view</em> and 
<em>buy</em> events, which means that the engine by default recommends 
un-viewed and un-bought items only. You can also define your own events which 
are considered as <em>seen</em>.</p><p>The constraint <em>unavailableItems</em> 
set events are used to exclude a list of unavailable items (such as out of 
stock) for all users in real time.</p><h3 id='input-query' 
class='header-anchors'>Input Query</h3> <ul> <li>UserID</li> <li>Num of items 
to be recommended</li> <li>List of white-listed item categories (optional)</li> 
<li>List of white-listed ItemIds (optional)</li> <li>List of black-listed 
ItemIds (optional)</li> </ul> <p>The template also supports black-list and 
whitelist. If a whitelist is pro
 vided, the engine will include only those products in the recommendation. 
Likewise, if a blacklist is provided, the engine will exclude those products in 
the recommendation.</p><h3 id='output-predictedresult' 
class='header-anchors'>Output PredictedResult</h3> <ul> <li>A ranked list of 
recommended itemIDs</li> </ul> <h2 id='1.-install-and-run-predictionio' 
class='header-anchors'>1. Install and Run PredictionIO</h2> <p>First you need 
to <a href="/install">install PredictionIO 0.13.0</a> (if you haven&#39;t done 
it).</p><p>Let&#39;s say you have installed PredictionIO at 
<code>/home/yourname/PredictionIO/</code>. For convenience, add 
PredictionIO&#39;s binary command path to your <code>PATH</code>, i.e. 
<code>/home/yourname/PredictionIO/bin</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><span class="nv">PATH</span><span 
cla
 ss="o">=</span><span class="nv">$PATH</span>:/home/yourname/PredictionIO/bin; 
<span class="nb">export </span>PATH
 </pre></td></tr></tbody></table> </div> <div class="alert-message note"><p>If 
you launched <strong>PredictionIO AWS instance</strong>, the path is located at 
<code>/opt/PredictionIO/bin</code>.</p></div><p>Once you have completed the 
installation process, please make sure all the components (PredictionIO Event 
Server, Elasticsearch, and HBase) are up and running.</p><div 
class="alert-message note"><p>If you launched <strong>PredictionIO AWS 
instance</strong>, you can skip <code>pio-start-all</code>. All components 
should have been started automatically.</p></div><p>If you are using PostgreSQL 
or MySQL, run the following to start PredictionIO Event Server:</p><div 
class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td 
class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td 
class="code"><pre><span class="gp">$ </span>pio eventserver &amp;
 </pre></td></tr></tbody></table> </div> <p>If instead you are running HBase 
and Elasticsearch, run the following to start all PredictionIO Event Server, 
HBase, and Elasticsearch:</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-start-all
 </pre></td></tr></tbody></table> </div> <p>You can check the status 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 
status
@@ -32,7 +32,7 @@ Your system is all ready to go.
 <span class="o">[</span>INFO] <span class="o">[</span>App<span 
class="nv">$]</span>               MyApp1 |    1 | 
3mZWDzci2D5YsqAnqNnXH9SB6Rg3dsTBs8iHkK6X2i54IQsIZI1eEeQQyMfs7b3F | <span 
class="o">(</span>all<span class="o">)</span>
 <span class="o">[</span>INFO] <span class="o">[</span>App<span 
class="nv">$]</span>               MyApp2 |    2 | 
io5lz6Eg4m3Xe4JZTBFE13GMAf1dhFl6ZteuJfrO84XpdOz9wRCrDU44EUaYuXq5 | <span 
class="o">(</span>all<span class="o">)</span>
 <span class="o">[</span>INFO] <span class="o">[</span>App<span 
class="nv">$]</span> Finished listing 2 app<span class="o">(</span>s<span 
class="o">)</span>.
-</pre></td></tr></tbody></table> </div> <p><a href="#"></a></p> <h2 
id='4.-collecting-data' class='header-anchors'>4. Collecting Data</h2><p>Next, 
let&#39;s collect training data for this Engine. By default, the E-Commerce 
Recommendation Engine Template supports 2 types of entities and 2 events: 
<strong>user</strong> and <strong>item</strong>; events <strong>view</strong> 
and <strong>buy</strong>. An item has the <strong>categories</strong> property, 
which is a list of category names (String). A user can view and buy an item. 
The specical <strong>constraint</strong> entiy with entityId 
<strong>unavailableItems</strong> defines a list of unavailable items and is 
taken into account in realtime during serving.</p><p>In summary, this template 
requires &#39;$set&#39; user event, &#39;$set&#39; item event, user-view-item 
events, user-buy-item event and &#39;$set&#39; constraint event.</p><div 
class="alert-message info"><p>This template can easily be customized to 
consider other user-to-it
 em events.</p></div> <p>You can send these events to PredictionIO Event Server 
in real-time easily by making a HTTP request or through the provided SDK. 
Please see <a href="/appintegration/">App Integration Overview</a> for more 
details how to integrate your app with SDK.</p><p>Let&#39;s try sending events 
to EventServer with the following <code>curl</code> commands (The corresponding 
SDK code is showed in other tabs).</p><p>Replace 
<code>&lt;ACCCESS_KEY&gt;</code> by the Access Key generated in above steps. 
Note that <code>localhost:7070</code> is the default URL of the Event 
Server.</p><p>For convenience, set your access key to the shell variable, 
run:</p><p><code>$ ACCESS_KEY=&lt;ACCESS_KEY&gt;</code></p> <p><a 
href="#"></a></p> <p>For example, when a new user with id &quot;u0&quot; is 
created in your app on time <code>2014-11-02T09:39:45.618-08:00</code> (current 
time will be used if eventTime is not specified), you can send a 
<code>$set</code> event for this user. To send this 
 event, run the following <code>curl</code> command:</p><div class="tabs"> <ul 
class="control"> <li data-lang="json"><a 
href="#tab-fdd01be0-cb3a-45d3-9983-d6c3af176340">REST API</a></li> <li 
data-lang="python"><a href="#tab-fa117c06-e503-418c-9ff2-c57e805228a1">Python 
SDK</a></li> <li data-lang="php"><a 
href="#tab-3d9b5d83-90e5-496d-b2b7-07263fb0ea1f">PHP SDK</a></li> <li 
data-lang="ruby"><a href="#tab-ca7727d8-e246-4a51-9979-dc0d2711bccf">Ruby 
SDK</a></li> <li data-lang="java"><a 
href="#tab-b75b0ac9-c5f2-4486-aebe-faa8501d7af3">Java SDK</a></li> </ul> <div 
data-tab="REST API" data-lang="json" 
id="tab-fdd01be0-cb3a-45d3-9983-d6c3af176340"> <div class="highlight shell"> 
<table style="border-spacing: 0"><tbody><tr> <td class="gutter gl" 
style="text-align: right"><pre class="lineno">1
+</pre></td></tr></tbody></table> </div> <p><a href="#"></a></p> <h2 
id='4.-collecting-data' class='header-anchors'>4. Collecting Data</h2><p>Next, 
let&#39;s collect training data for this Engine. By default, the E-Commerce 
Recommendation Engine Template supports 2 types of entities and 2 events: 
<strong>user</strong> and <strong>item</strong>; events <strong>view</strong> 
and <strong>buy</strong>. An item has the <strong>categories</strong> property, 
which is a list of category names (String). A user can view and buy an item. 
The special <strong>constraint</strong> entity with entityId 
<strong>unavailableItems</strong> defines a list of unavailable items and is 
taken into account in realtime during serving.</p><p>In summary, this template 
requires &#39;$set&#39; user event, &#39;$set&#39; item event, user-view-item 
events, user-buy-item event and &#39;$set&#39; constraint event.</p><div 
class="alert-message info"><p>This template can easily be customized to 
consider other user-to-it
 em events.</p></div> <p>You can send these events to PredictionIO Event Server 
in real-time easily by making a HTTP request or through the provided SDK. 
Please see <a href="/appintegration/">App Integration Overview</a> for more 
details how to integrate your app with SDK.</p><p>Let&#39;s try sending events 
to EventServer with the following <code>curl</code> commands (The corresponding 
SDK code is showed in other tabs).</p><p>Replace 
<code>&lt;ACCCESS_KEY&gt;</code> by the Access Key generated in above steps. 
Note that <code>localhost:7070</code> is the default URL of the Event 
Server.</p><p>For convenience, set your access key to the shell variable, 
run:</p><p><code>$ ACCESS_KEY=&lt;ACCESS_KEY&gt;</code></p> <p><a 
href="#"></a></p> <p>For example, when a new user with id &quot;u0&quot; is 
created in your app on time <code>2014-11-02T09:39:45.618-08:00</code> (current 
time will be used if eventTime is not specified), you can send a 
<code>$set</code> event for this user. To send this 
 event, run the following <code>curl</code> command:</p><div class="tabs"> <ul 
class="control"> <li data-lang="json"><a 
href="#tab-ad2a3ccc-da7a-4f4a-84a2-94e2decbe1cd">REST API</a></li> <li 
data-lang="python"><a href="#tab-4175dab6-3847-413e-83e4-071423471266">Python 
SDK</a></li> <li data-lang="php"><a 
href="#tab-57a01268-a2c0-4972-9b14-f2ed05956668">PHP SDK</a></li> <li 
data-lang="ruby"><a href="#tab-a24e1a51-0ec7-4649-bc00-8c961bc85743">Ruby 
SDK</a></li> <li data-lang="java"><a 
href="#tab-12d18436-cf43-4c1e-9c26-4bf57bb304af">Java SDK</a></li> </ul> <div 
data-tab="REST API" data-lang="json" 
id="tab-ad2a3ccc-da7a-4f4a-84a2-94e2decbe1cd"> <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
@@ -47,7 +47,7 @@ Your system is all ready to go.
   "entityId" : "u0",
   "eventTime" : "2014-11-02T09:39:45.618-08:00"
 }'</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Python SDK" 
data-lang="python" id="tab-fa117c06-e503-418c-9ff2-c57e805228a1"> <div 
class="highlight python"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Python SDK" 
data-lang="python" id="tab-4175dab6-3847-413e-83e4-071423471266"> <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
@@ -78,7 +78,7 @@ Your system is all ready to go.
   <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">=&lt;</span><span 
class="n">USER_ID</span><span class="o">&gt;</span>
 <span class="p">)</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="PHP SDK" 
data-lang="php" id="tab-3d9b5d83-90e5-496d-b2b7-07263fb0ea1f"> <div 
class="highlight php"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="PHP SDK" 
data-lang="php" id="tab-57a01268-a2c0-4972-9b14-f2ed05956668"> <div 
class="highlight php"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
 2
 3
 4
@@ -119,7 +119,7 @@ Your system is all ready to go.
   <span class="s1">'properties'</span> <span class="o">=&gt;</span> <span 
class="k">array</span><span class="p">(</span><span 
class="s1">'categories'</span> <span class="o">=&gt;</span> <span 
class="k">array</span><span class="p">(</span><span 
class="s1">'&lt;CATEGORY_1&gt;'</span><span class="p">,</span> <span 
class="s1">'&lt;CATEGORY_2&gt;'</span><span class="p">))</span>
 <span class="p">));</span>
 <span class="cp">?&gt;</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Ruby SDK" 
data-lang="ruby" id="tab-ca7727d8-e246-4a51-9979-dc0d2711bccf"> <div 
class="highlight ruby"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Ruby SDK" 
data-lang="ruby" id="tab-a24e1a51-0ec7-4649-bc00-8c961bc85743"> <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
@@ -136,7 +136,7 @@ Your system is all ready to go.
   <span class="s1">'user'</span><span class="p">,</span>
   <span class="o">&lt;</span><span class="no">USER</span> <span 
class="no">ID</span><span class="o">&gt;</span>
 <span class="p">)</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Java SDK" 
data-lang="java" id="tab-b75b0ac9-c5f2-4486-aebe-faa8501d7af3"> <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> </tr></tbody></table> </div> </div> <div data-tab="Java SDK" 
data-lang="java" id="tab-12d18436-cf43-4c1e-9c26-4bf57bb304af"> <div 
class="highlight java"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
 2
 3
 4
@@ -161,7 +161,7 @@ Your system is all ready to go.
   <span class="o">.</span><span class="na">entityType</span><span 
class="o">(</span><span class="s">"user"</span><span class="o">)</span>
   <span class="o">.</span><span class="na">entityId</span><span 
class="o">(&lt;</span><span class="n">USER_ID</span><span 
class="o">&gt;);</span>
 <span class="n">client</span><span class="o">.</span><span 
class="na">createEvent</span><span class="o">(</span><span 
class="n">userEvent</span><span class="o">);</span>
-</pre></td> </tr></tbody></table> </div> </div> </div> <p>When a new item 
&quot;i0&quot; is created in your app on time 
<code>2014-11-02T09:39:45.618-08:00</code> (current time will be used if 
eventTime is not specified), you can send a <code>$set</code> event for the 
item. Note that the item is set with categories properties: 
<code>&quot;c1&quot;</code> and <code>&quot;c2&quot;</code>. Run the following 
<code>curl</code> command:</p><div class="tabs"> <ul class="control"> <li 
data-lang="json"><a href="#tab-e45acb9b-a30b-4d61-90a2-ff369ca6ceb2">REST 
API</a></li> <li data-lang="python"><a 
href="#tab-999fbe7e-3b3f-416b-be4c-7be0ab393842">Python SDK</a></li> <li 
data-lang="php"><a href="#tab-e2ec96d9-d87e-4aae-b421-ac3b5b0728b4">PHP 
SDK</a></li> <li data-lang="ruby"><a 
href="#tab-03b393b3-729c-4e65-a0f2-9ea2150acf63">Ruby SDK</a></li> <li 
data-lang="java"><a href="#tab-2d4d5967-2558-416b-9e49-035c81f043c1">Java 
SDK</a></li> </ul> <div data-tab="REST API" data-lang="json" id="tab-e45acb
 9b-a30b-4d61-90a2-ff369ca6ceb2"> <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> </tr></tbody></table> </div> </div> </div> <p>When a new item 
&quot;i0&quot; is created in your app on time 
<code>2014-11-02T09:39:45.618-08:00</code> (current time will be used if 
eventTime is not specified), you can send a <code>$set</code> event for the 
item. Note that the item is set with categories properties: 
<code>&quot;c1&quot;</code> and <code>&quot;c2&quot;</code>. Run the following 
<code>curl</code> command:</p><div class="tabs"> <ul class="control"> <li 
data-lang="json"><a href="#tab-94d21f56-6837-4f81-b49c-d5dafecb5bad">REST 
API</a></li> <li data-lang="python"><a 
href="#tab-fadc5726-2c61-4a8d-a87b-fcbd9fe28942">Python SDK</a></li> <li 
data-lang="php"><a href="#tab-60342bcc-3661-41c8-b0d8-bfc7b11a5c1b">PHP 
SDK</a></li> <li data-lang="ruby"><a 
href="#tab-76cd97fe-5031-4f73-9f5d-28dc6a27f313">Ruby SDK</a></li> <li 
data-lang="java"><a href="#tab-0ed7f311-1c60-4c9e-9583-f5dcf9a14264">Java 
SDK</a></li> </ul> <div data-tab="REST API" data-lang="json" id="tab-94d21f
 56-6837-4f81-b49c-d5dafecb5bad"> <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
@@ -182,7 +182,7 @@ Your system is all ready to go.
   }
   "eventTime" : "2014-11-02T09:39:45.618-08:00"
 }'</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Python SDK" 
data-lang="python" id="tab-999fbe7e-3b3f-416b-be4c-7be0ab393842"> <div 
class="highlight python"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Python SDK" 
data-lang="python" id="tab-fadc5726-2c61-4a8d-a87b-fcbd9fe28942"> <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
@@ -201,7 +201,7 @@ Your system is all ready to go.
     <span class="s">"categories"</span> <span class="p">:</span> <span 
class="p">[</span><span class="s">"&lt;CATEGORY_1&gt;"</span><span 
class="p">,</span> <span class="s">"&lt;CATEGORY_2&gt;"</span><span 
class="p">]</span>
   <span class="p">}</span>
 <span class="p">)</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="PHP SDK" 
data-lang="php" id="tab-e2ec96d9-d87e-4aae-b421-ac3b5b0728b4"> <div 
class="highlight php"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="PHP SDK" 
data-lang="php" id="tab-60342bcc-3661-41c8-b0d8-bfc7b11a5c1b"> <div 
class="highlight php"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
 2
 3
 4
@@ -218,7 +218,7 @@ Your system is all ready to go.
   <span class="s1">'properties'</span> <span class="o">=&gt;</span> <span 
class="k">array</span><span class="p">(</span><span 
class="s1">'categories'</span> <span class="o">=&gt;</span> <span 
class="k">array</span><span class="p">(</span><span 
class="s1">'&lt;CATEGORY_1&gt;'</span><span class="p">,</span> <span 
class="s1">'&lt;CATEGORY_2&gt;'</span><span class="p">))</span>
 <span class="p">));</span>
 <span class="cp">?&gt;</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Ruby SDK" 
data-lang="ruby" id="tab-03b393b3-729c-4e65-a0f2-9ea2150acf63"> <div 
class="highlight ruby"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Ruby SDK" 
data-lang="ruby" id="tab-76cd97fe-5031-4f73-9f5d-28dc6a27f313"> <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
@@ -235,7 +235,7 @@ Your system is all ready to go.
   <span class="p">}</span>
 <span class="p">)</span>
 
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Java SDK" 
data-lang="java" id="tab-2d4d5967-2558-416b-9e49-035c81f043c1"> <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> </tr></tbody></table> </div> </div> <div data-tab="Java SDK" 
data-lang="java" id="tab-0ed7f311-1c60-4c9e-9583-f5dcf9a14264"> <div 
class="highlight java"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
 2
 3
 4
@@ -248,7 +248,7 @@ Your system is all ready to go.
   <span class="o">.</span><span class="na">entityId</span><span 
class="o">(&lt;</span><span class="n">ITEM_ID</span><span class="o">&gt;)</span>
   <span class="o">.</span><span class="na">property</span><span 
class="o">(</span><span class="s">"categories"</span><span class="o">,</span> 
<span class="n">ImmutableList</span><span class="o">.</span><span 
class="na">of</span><span class="o">(</span><span 
class="s">"&lt;CATEGORY_1&gt;"</span><span class="o">,</span> <span 
class="s">"&lt;CATEGORY_2&gt;"</span><span class="o">));</span>
 <span class="n">client</span><span class="o">.</span><span 
class="na">createEvent</span><span class="o">(</span><span 
class="n">itemEvent</span><span class="o">)</span>
-</pre></td> </tr></tbody></table> </div> </div> </div> <p>The properties of 
the <code>user</code> and <code>item</code> can be set, unset, or delete by 
special events <strong>$set</strong>, <strong>$unset</strong> and 
<strong>$delete</strong>. Please refer to <a 
href="/datacollection/eventapi/#note-about-properties">Event API</a> for more 
details of using these events.</p><p>When the user &quot;u0&quot; view item 
&quot;i0&quot; on time <code>2014-11-10T12:34:56.123-08:00</code> (current time 
will be used if eventTime is not specified), you can send a view event. Run the 
following <code>curl</code> command:</p><div class="tabs"> <ul class="control"> 
<li data-lang="json"><a href="#tab-30ba6877-181b-4243-9a49-71d976ba5fff">REST 
API</a></li> <li data-lang="python"><a 
href="#tab-d6a8c0b5-80c3-4858-b986-c3d89067ff33">Python SDK</a></li> <li 
data-lang="php"><a href="#tab-c29ef45c-4b24-4dc4-9d1e-16d147fddafb">PHP 
SDK</a></li> <li data-lang="ruby"><a href="#tab-ec21a837-31df-4977-a972-fefb31
 472879">Ruby SDK</a></li> <li data-lang="java"><a 
href="#tab-b86fa7aa-3dfe-4d1e-8260-02c789c0f96b">Java SDK</a></li> </ul> <div 
data-tab="REST API" data-lang="json" 
id="tab-30ba6877-181b-4243-9a49-71d976ba5fff"> <div class="highlight shell"> 
<table style="border-spacing: 0"><tbody><tr> <td class="gutter gl" 
style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> </div> <p>The properties of 
the <code>user</code> and <code>item</code> can be set, unset, or delete by 
special events <strong>$set</strong>, <strong>$unset</strong> and 
<strong>$delete</strong>. Please refer to <a 
href="/datacollection/eventapi/#note-about-properties">Event API</a> for more 
details of using these events.</p><p>When the user &quot;u0&quot; view item 
&quot;i0&quot; on time <code>2014-11-10T12:34:56.123-08:00</code> (current time 
will be used if eventTime is not specified), you can send a view event. Run the 
following <code>curl</code> command:</p><div class="tabs"> <ul class="control"> 
<li data-lang="json"><a href="#tab-5eafad4b-1372-4ce9-b981-f6314f0804b9">REST 
API</a></li> <li data-lang="python"><a 
href="#tab-f3ad8a3b-f028-4c05-9dac-e61b1ae5915d">Python SDK</a></li> <li 
data-lang="php"><a href="#tab-b3182e74-5a42-47bc-8398-05b1d08bf372">PHP 
SDK</a></li> <li data-lang="ruby"><a href="#tab-c96b0c8f-8635-442e-8036-782226
 bd97b4">Ruby SDK</a></li> <li data-lang="java"><a 
href="#tab-0021b35e-f36a-4f1e-b7c5-67ed349e8b95">Java SDK</a></li> </ul> <div 
data-tab="REST API" data-lang="json" 
id="tab-5eafad4b-1372-4ce9-b981-f6314f0804b9"> <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
@@ -267,7 +267,7 @@ Your system is all ready to go.
   "targetEntityId" : "i0",
   "eventTime" : "2014-11-10T12:34:56.123-08:00"
 }'</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Python SDK" 
data-lang="python" id="tab-d6a8c0b5-80c3-4858-b986-c3d89067ff33"> <div 
class="highlight python"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Python SDK" 
data-lang="python" id="tab-f3ad8a3b-f028-4c05-9dac-e61b1ae5915d"> <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
@@ -284,7 +284,7 @@ Your system is all ready to go.
   <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">=&lt;</span><span 
class="n">ITEM</span> <span class="n">ID</span><span class="o">&gt;</span>
 <span class="p">)</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="PHP SDK" 
data-lang="php" id="tab-c29ef45c-4b24-4dc4-9d1e-16d147fddafb"> <div 
class="highlight php"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="PHP SDK" 
data-lang="php" id="tab-b3182e74-5a42-47bc-8398-05b1d08bf372"> <div 
class="highlight php"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
 2
 3
 4
@@ -303,7 +303,7 @@ Your system is all ready to go.
    <span class="s1">'targetEntityId'</span> <span class="o">=&gt;</span> <span 
class="o">&lt;</span><span class="nx">ITEM</span> <span 
class="nx">ID</span><span class="o">&gt;</span>
 <span class="p">));</span>
 <span class="cp">?&gt;</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Ruby SDK" 
data-lang="ruby" id="tab-ec21a837-31df-4977-a972-fefb31472879"> <div 
class="highlight ruby"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Ruby SDK" 
data-lang="ruby" id="tab-c96b0c8f-8635-442e-8036-782226bd97b4"> <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
@@ -322,7 +322,7 @@ Your system is all ready to go.
   <span class="p">}</span>
 <span class="p">)</span>
 
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Java SDK" 
data-lang="java" id="tab-b86fa7aa-3dfe-4d1e-8260-02c789c0f96b"> <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> </tr></tbody></table> </div> </div> <div data-tab="Java SDK" 
data-lang="java" id="tab-0021b35e-f36a-4f1e-b7c5-67ed349e8b95"> <div 
class="highlight java"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
 2
 3
 4
@@ -337,7 +337,7 @@ Your system is all ready to go.
     <span class="o">.</span><span class="na">targetEntityType</span><span 
class="o">(</span><span class="s">"item"</span><span class="o">)</span>
     <span class="o">.</span><span class="na">targetEntityId</span><span 
class="o">(&lt;</span><span class="n">ITEM_ID</span><span 
class="o">&gt;);</span>
 <span class="n">client</span><span class="o">.</span><span 
class="na">createEvent</span><span class="o">(</span><span 
class="n">viewEvent</span><span class="o">);</span>
-</pre></td> </tr></tbody></table> </div> </div> </div> <p>When the user 
&quot;u0&quot; buy item &quot;i0&quot; on time 
<code>2014-11-10T13:00:00.123-08:00</code> (current time will be used if 
eventTime is not specified), you can send a view event. Run the following 
<code>curl</code> command:</p><div class="tabs"> <ul class="control"> <li 
data-lang="json"><a href="#tab-b3d7842f-8347-4364-902a-4062ae78b429">REST 
API</a></li> <li data-lang="python"><a 
href="#tab-b1ea6c58-5c7b-4af5-9349-19768a4ebf39">Python SDK</a></li> <li 
data-lang="php"><a href="#tab-072a87ae-5338-47d4-9aab-35e8724e1fdc">PHP 
SDK</a></li> <li data-lang="ruby"><a 
href="#tab-be089b79-2f1f-4e11-a7bc-cfa901604710">Ruby SDK</a></li> <li 
data-lang="java"><a href="#tab-2406a891-22e3-464b-bd97-2ae0599b8730">Java 
SDK</a></li> </ul> <div data-tab="REST API" data-lang="json" 
id="tab-b3d7842f-8347-4364-902a-4062ae78b429"> <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> </tr></tbody></table> </div> </div> </div> <p>When the user 
&quot;u0&quot; buy item &quot;i0&quot; on time 
<code>2014-11-10T13:00:00.123-08:00</code> (current time will be used if 
eventTime is not specified), you can send a view event. Run the following 
<code>curl</code> command:</p><div class="tabs"> <ul class="control"> <li 
data-lang="json"><a href="#tab-b026293c-7269-4c76-aa9e-51c8984b5ab1">REST 
API</a></li> <li data-lang="python"><a 
href="#tab-7d6a0c10-d4eb-4d3e-a291-e2db7a8f00c9">Python SDK</a></li> <li 
data-lang="php"><a href="#tab-204592ca-594f-4bfc-977f-997fe3179eb4">PHP 
SDK</a></li> <li data-lang="ruby"><a 
href="#tab-052fa7e4-a021-4dd4-bb3f-53cf7b8a6543">Ruby SDK</a></li> <li 
data-lang="java"><a href="#tab-3eb91da8-18ae-4ab6-90a2-622adca25c4a">Java 
SDK</a></li> </ul> <div data-tab="REST API" data-lang="json" 
id="tab-b026293c-7269-4c76-aa9e-51c8984b5ab1"> <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
@@ -356,7 +356,7 @@ Your system is all ready to go.
   "targetEntityId" : "i0",
   "eventTime" : "2014-11-10T13:00:00.123-08:00"
 }'</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Python SDK" 
data-lang="python" id="tab-b1ea6c58-5c7b-4af5-9349-19768a4ebf39"> <div 
class="highlight python"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Python SDK" 
data-lang="python" id="tab-7d6a0c10-d4eb-4d3e-a291-e2db7a8f00c9"> <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
@@ -373,7 +373,7 @@ Your system is all ready to go.
   <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">=&lt;</span><span 
class="n">ITEM</span> <span class="n">ID</span><span class="o">&gt;</span>
 <span class="p">)</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="PHP SDK" 
data-lang="php" id="tab-072a87ae-5338-47d4-9aab-35e8724e1fdc"> <div 
class="highlight php"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="PHP SDK" 
data-lang="php" id="tab-204592ca-594f-4bfc-977f-997fe3179eb4"> <div 
class="highlight php"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
 2
 3
 4
@@ -392,7 +392,7 @@ Your system is all ready to go.
    <span class="s1">'targetEntityId'</span> <span class="o">=&gt;</span> <span 
class="o">&lt;</span><span class="nx">ITEM</span> <span 
class="nx">ID</span><span class="o">&gt;</span>
 <span class="p">));</span>
 <span class="cp">?&gt;</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Ruby SDK" 
data-lang="ruby" id="tab-be089b79-2f1f-4e11-a7bc-cfa901604710"> <div 
class="highlight ruby"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Ruby SDK" 
data-lang="ruby" id="tab-052fa7e4-a021-4dd4-bb3f-53cf7b8a6543"> <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
@@ -409,7 +409,7 @@ Your system is all ready to go.
     <span class="s1">'targetEntityId'</span> <span class="o">=&gt;</span> 
<span class="o">&lt;</span><span class="no">ITEM</span> <span 
class="no">ID</span><span class="o">&gt;</span>
   <span class="p">}</span>
 <span class="p">)</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Java SDK" 
data-lang="java" id="tab-2406a891-22e3-464b-bd97-2ae0599b8730"> <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> </tr></tbody></table> </div> </div> <div data-tab="Java SDK" 
data-lang="java" id="tab-3eb91da8-18ae-4ab6-90a2-622adca25c4a"> <div 
class="highlight java"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
 2
 3
 4
@@ -490,19 +490,19 @@ User u10 buys item i40
 </pre></td></tr></tbody></table> </div> <p>When the engine is deployed 
successfully and running, you should see a console message similar to the 
following:</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</pre></td><td class="code"><pre><span class="o">[</span>INFO] <span 
class="o">[</span>HttpListener] Bound to /0.0.0.0:8000
 <span class="o">[</span>INFO] <span class="o">[</span>MasterActor] Bind 
successful. Ready to serve.
-</pre></td></tr></tbody></table> </div> <p>Do not kill the deployed engine 
process.</p><p>By default, the deployed engine binds to <a 
href="http://localhost:8000";><a 
href="http://localhost:8000";>http://localhost:8000</a></a>. You can visit that 
page in your web browser to check its status.</p><p><img alt="Engine Status" 
src="/images/engine-server-3246414b.png"/></p></p><h2 id='6.-use-the-engine' 
class='header-anchors'>6. Use the Engine</h2><p>Now, You can retrieve predicted 
results. To recommend 4 items to user ID &quot;u1&quot;. You send this JSON 
<code>{ &quot;user&quot;: &quot;u1&quot;, &quot;num&quot;: 4 }</code> to the 
deployed engine and it will return a JSON of the recommended items. Simply send 
a query by making a HTTP request or through the <code>EngineClient</code> of an 
SDK.</p><p>With the deployed engine running, open another terminal and run the 
following <code>curl</code> command or use SDK to send the query:</p><div 
class="tabs"> <ul class="control"> <li data-lang="js
 on"><a href="#tab-b423f98a-2502-4627-b363-3b8b86dddc66">REST API</a></li> <li 
data-lang="python"><a href="#tab-0fad5c1b-f428-4131-9ef0-c28e445fd7df">Python 
SDK</a></li> <li data-lang="php"><a 
href="#tab-a547ad7b-24eb-49be-ac02-a47fb90b3cf7">PHP SDK</a></li> <li 
data-lang="ruby"><a href="#tab-b3bdc8f0-77d8-4e81-924b-e8f0b72ba4ca">Ruby 
SDK</a></li> <li data-lang="java"><a 
href="#tab-3733150d-f77a-4a74-8aa9-e5d6a9b3fbd4">Java SDK</a></li> </ul> <div 
data-tab="REST API" data-lang="json" 
id="tab-b423f98a-2502-4627-b363-3b8b86dddc66"> <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></tr></tbody></table> </div> <p>Do not kill the deployed engine 
process.</p><p>By default, the deployed engine binds to <a 
href="http://localhost:8000";><a 
href="http://localhost:8000";>http://localhost:8000</a></a>. You can visit that 
page in your web browser to check its status.</p><p><img alt="Engine Status" 
src="/images/engine-server-3246414b.png"/></p></p><h2 id='6.-use-the-engine' 
class='header-anchors'>6. Use the Engine</h2><p>Now, You can retrieve predicted 
results. To recommend 4 items to user ID &quot;u1&quot;. You send this JSON 
<code>{ &quot;user&quot;: &quot;u1&quot;, &quot;num&quot;: 4 }</code> to the 
deployed engine and it will return a JSON of the recommended items. Simply send 
a query by making a HTTP request or through the <code>EngineClient</code> of an 
SDK.</p><p>With the deployed engine running, open another terminal and run the 
following <code>curl</code> command or use SDK to send the query:</p><div 
class="tabs"> <ul class="control"> <li data-lang="js
 on"><a href="#tab-c3ff31ac-27fe-4ce3-8ed3-96793f84617f">REST API</a></li> <li 
data-lang="python"><a href="#tab-45135a94-5511-4347-a552-2a1ab14455d5">Python 
SDK</a></li> <li data-lang="php"><a 
href="#tab-f45ce451-bc46-4d21-9266-afa486b81241">PHP SDK</a></li> <li 
data-lang="ruby"><a href="#tab-6188a095-72b2-43a5-bb03-3fbc6645b296">Ruby 
SDK</a></li> <li data-lang="java"><a 
href="#tab-53cefd9f-7e4a-41b5-84a6-08cba5a84245">Java SDK</a></li> </ul> <div 
data-tab="REST API" data-lang="json" 
id="tab-c3ff31ac-27fe-4ce3-8ed3-96793f84617f"> <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="gp">$ </span>curl -H <span 
class="s2">"Content-Type: application/json"</span> <span class="se">\</span>
 -d <span class="s1">'{ "user": "u1", "num": 4 }'</span> <span 
class="se">\</span>
 http://localhost:8000/queries.json
 
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Python SDK" 
data-lang="python" id="tab-0fad5c1b-f428-4131-9ef0-c28e445fd7df"> <div 
class="highlight python"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Python SDK" 
data-lang="python" id="tab-45135a94-5511-4347-a552-2a1ab14455d5"> <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</pre></td> <td class="code"><pre><span class="kn">import</span> <span 
class="nn">predictionio</span>
 <span class="n">engine_client</span> <span class="o">=</span> <span 
class="n">predictionio</span><span class="o">.</span><span 
class="n">EngineClient</span><span class="p">(</span><span 
class="n">url</span><span class="o">=</span><span 
class="s">"http://localhost:8000";</span><span class="p">)</span>
 <span class="k">print</span> <span class="n">engine_client</span><span 
class="o">.</span><span class="n">send_query</span><span 
class="p">({</span><span class="s">"user"</span><span class="p">:</span> <span 
class="s">"u1"</span><span class="p">,</span> <span class="s">"num"</span><span 
class="p">:</span> <span class="mi">4</span><span class="p">})</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="PHP SDK" 
data-lang="php" id="tab-a547ad7b-24eb-49be-ac02-a47fb90b3cf7"> <div 
class="highlight php"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="PHP SDK" 
data-lang="php" id="tab-f45ce451-bc46-4d21-9266-afa486b81241"> <div 
class="highlight php"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
 2
 3
 4
@@ -521,7 +521,7 @@ http://localhost:8000/queries.json
 <span class="nb">print_r</span><span class="p">(</span><span 
class="nv">$response</span><span class="p">);</span>
 
 <span class="cp">?&gt;</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Ruby SDK" 
data-lang="ruby" id="tab-b3bdc8f0-77d8-4e81-924b-e8f0b72ba4ca"> <div 
class="highlight ruby"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Ruby SDK" 
data-lang="ruby" id="tab-6188a095-72b2-43a5-bb03-3fbc6645b296"> <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
@@ -534,7 +534,7 @@ http://localhost:8000/queries.json
 <span class="n">response</span> <span class="o">=</span> <span 
class="n">client</span><span class="p">.</span><span 
class="nf">send_query</span><span class="p">(</span><span 
class="s1">'user'</span> <span class="o">=&gt;</span> <span 
class="s1">'i1'</span><span class="p">,</span> <span class="s1">'num'</span> 
<span class="o">=&gt;</span> <span class="mi">4</span><span class="p">)</span>
 
 <span class="nb">puts</span> <span class="n">response</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Java SDK" 
data-lang="java" id="tab-3733150d-f77a-4a74-8aa9-e5d6a9b3fbd4"> <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> </tr></tbody></table> </div> </div> <div data-tab="Java SDK" 
data-lang="java" id="tab-53cefd9f-7e4a-41b5-84a6-08cba5a84245"> <div 
class="highlight java"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
 2
 3
 4
@@ -578,7 +578,7 @@ http://localhost:8000/queries.json
     <span class="o">{</span><span class="s2">"item"</span>:<span 
class="s2">"i3"</span>,<span 
class="s2">"score"</span>:0.003007015026561692<span class="o">}</span>
   <span class="o">]</span>
 <span class="o">}</span>
-</pre></td></tr></tbody></table> </div> <p><em>MyECommerceRecommendation</em> 
is now running.</p> <div class="alert-message info"><p>To update the model 
periodically with new data, simply set up a cron job to call <code>pio 
train</code> and <code>pio deploy</code>. The engine will continue to serve 
prediction results during the re-train process. After the training is 
completed, <code>pio deploy</code> will automatically shutdown the existing 
engine server and bring up a new process on the same port.</p></div><div 
class="alert-message info"><p><strong>Note that if you import a <em>large</em> 
data set</strong> and the training seems to be taking forever or getting stuck, 
it&#39;s likely that there is not enough executor memory. It&#39;s recommended 
to setup a Spark standalone cluster, you&#39;ll need to specify more driver and 
executor memory when training with a large data set. Please see <a 
href="/resources/faq/#engine-training">FAQ here</a> for instructions.</p></div> 
<h2 id='setti
 ng-constraint-&quot;unavailableitems&quot;' class='header-anchors'>Setting 
constraint &quot;unavailableItems&quot;</h2><p>Now let&#39;s send a item 
contraint &quot;unavailableItems&quot; (replace accessKey with your Access 
Key):</p><div class="alert-message note"><p>You can also use SDK to send this 
event as described in the SDK sample above.</p></div><div class="tabs"> <ul 
class="control"> <li data-lang="json"><a 
href="#tab-a80e3f35-86f1-452c-a7fa-a9eed41dd1ed">REST API</a></li> <li 
data-lang="python"><a href="#tab-1e0c11cd-4473-47aa-9245-0ac6119b8fe8">Python 
SDK</a></li> <li data-lang="php"><a 
href="#tab-ee88299f-4e9a-4b3d-b566-cf15dc3ec3e7">PHP SDK</a></li> <li 
data-lang="ruby"><a href="#tab-319e0218-585e-4caa-a0b0-d32ce615d732">Ruby 
SDK</a></li> <li data-lang="java"><a 
href="#tab-e11eefb6-0d9c-4251-905d-1da0e621881c">Java SDK</a></li> </ul> <div 
data-tab="REST API" data-lang="json" 
id="tab-a80e3f35-86f1-452c-a7fa-a9eed41dd1ed"> <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></tr></tbody></table> </div> <p><em>MyECommerceRecommendation</em> 
is now running.</p> <div class="alert-message info"><p>To update the model 
periodically with new data, simply set up a cron job to call <code>pio 
train</code> and <code>pio deploy</code>. The engine will continue to serve 
prediction results during the re-train process. After the training is 
completed, <code>pio deploy</code> will automatically shutdown the existing 
engine server and bring up a new process on the same port.</p></div><div 
class="alert-message info"><p><strong>Note that if you import a <em>large</em> 
data set</strong> and the training seems to be taking forever or getting stuck, 
it&#39;s likely that there is not enough executor memory. It&#39;s recommended 
to setup a Spark standalone cluster, you&#39;ll need to specify more driver and 
executor memory when training with a large data set. Please see <a 
href="/resources/faq/#engine-training">FAQ here</a> for instructions.</p></div> 
<h2 id='setti
 ng-constraint-&quot;unavailableitems&quot;' class='header-anchors'>Setting 
constraint &quot;unavailableItems&quot;</h2><p>Now let&#39;s send a item 
contraint &quot;unavailableItems&quot; (replace accessKey with your Access 
Key):</p><div class="alert-message note"><p>You can also use SDK to send this 
event as described in the SDK sample above.</p></div><div class="tabs"> <ul 
class="control"> <li data-lang="json"><a 
href="#tab-7221cf57-3422-4be7-a762-a62a8eb9b80c">REST API</a></li> <li 
data-lang="python"><a href="#tab-dbe9bc18-721e-4650-a7cb-0f0632fc799a">Python 
SDK</a></li> <li data-lang="php"><a 
href="#tab-2c32c5e6-295f-4060-87bd-135e596ba233">PHP SDK</a></li> <li 
data-lang="ruby"><a href="#tab-4f95e373-05b3-429e-8f01-b54bb2e16b41">Ruby 
SDK</a></li> <li data-lang="java"><a 
href="#tab-34ddca14-df3f-475c-893b-0860ccacc0f4">Java SDK</a></li> </ul> <div 
data-tab="REST API" data-lang="json" 
id="tab-7221cf57-3422-4be7-a762-a62a8eb9b80c"> <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
@@ -599,7 +599,7 @@ http://localhost:8000/queries.json
   }
   "eventTime" : "2015-02-17T02:11:21.934Z"
 }'</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Python SDK" 
data-lang="python" id="tab-1e0c11cd-4473-47aa-9245-0ac6119b8fe8"> <div 
class="highlight python"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Python SDK" 
data-lang="python" id="tab-dbe9bc18-721e-4650-a7cb-0f0632fc799a"> <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
@@ -618,7 +618,7 @@ http://localhost:8000/queries.json
     <span class="s">"items"</span> <span class="p">:</span> <span 
class="p">[</span><span class="s">"&lt;ITEM ID1&gt;"</span><span 
class="p">,</span> <span class="s">"&lt;ITEM ID2&gt;"</span><span 
class="p">]</span>
   <span class="p">}</span>
 <span class="p">)</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="PHP SDK" 
data-lang="php" id="tab-ee88299f-4e9a-4b3d-b566-cf15dc3ec3e7"> <div 
class="highlight php"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="PHP SDK" 
data-lang="php" id="tab-2c32c5e6-295f-4060-87bd-135e596ba233"> <div 
class="highlight php"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
 2
 3
 4
@@ -635,7 +635,7 @@ http://localhost:8000/queries.json
   <span class="s1">'properties'</span> <span class="o">=&gt;</span> <span 
class="k">array</span><span class="p">(</span><span class="s1">'items'</span> 
<span class="o">=&gt;</span> <span class="k">array</span><span 
class="p">(</span><span class="s1">'&lt;ITEM ID1&gt;'</span><span 
class="p">,</span> <span class="s1">'&lt;ITEM ID2&gt;'</span><span 
class="p">))</span>
 <span class="p">));</span>
 <span class="cp">?&gt;</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Ruby SDK" 
data-lang="ruby" id="tab-319e0218-585e-4caa-a0b0-d32ce615d732"> <div 
class="highlight ruby"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Ruby SDK" 
data-lang="ruby" id="tab-4f95e373-05b3-429e-8f01-b54bb2e16b41"> <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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@@ -650,7 +650,7 @@ http://localhost:8000/queries.json
     <span class="s1">'properties'</span> <span class="o">=&gt;</span> <span 
class="p">{</span> <span class="s1">'items'</span> <span class="o">=&gt;</span> 
<span class="p">[</span><span class="s1">'&lt;ITEM ID1&gt;'</span><span 
class="p">,</span> <span class="s1">'&lt;ITEM ID2&gt;'</span><span 
class="p">]</span> <span class="p">}</span>
   <span class="p">}</span>
 <span class="p">)</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Java SDK" 
data-lang="java" id="tab-e11eefb6-0d9c-4251-905d-1da0e621881c"> <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> </tr></tbody></table> </div> </div> <div data-tab="Java SDK" 
data-lang="java" id="tab-34ddca14-df3f-475c-893b-0860ccacc0f4"> <div 
class="highlight java"> <table style="border-spacing: 0"><tbody><tr> <td 
class="gutter gl" style="text-align: right"><pre class="lineno">1
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@@ -663,7 +663,7 @@ http://localhost:8000/queries.json
   <span class="o">.</span><span class="na">entityId</span><span 
class="o">(</span><span class="s">"unavailableItems"</span><span 
class="o">)</span>
   <span class="o">.</span><span class="na">property</span><span 
class="o">(</span><span class="s">"items"</span><span class="o">,</span> <span 
class="n">ImmutableList</span><span class="o">.</span><span 
class="na">of</span><span class="o">(</span><span class="s">"&lt;ITEM 
ID1&gt;"</span><span class="o">,</span> <span class="s">"&lt;ITEM 
ID2&gt;"</span><span class="o">));</span>
 <span class="n">cl

<TRUNCATED>

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