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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="#">Collecting and Analyzing Data</a><span
class="spacer">></span></li><li><span
class="last">Channel</span></li></ul></div><div
id="page-title"><h1>Channel</h1></div></div><div
id="table-of-content-wrapper"><h5>On this page</h5><aside
id="table-of-contents"><
ul> <li> <a href="#create-a-new-channel">Create a new Channel</a> </li> <li>
<a href="#collect-data-through-channel">Collect data through Channel</a> </li>
<li> <a href="#delete-a-channel-including-all-imported-data">Delete a Channel
(including all imported data)</a> </li> <li> <a
href="#delete-the-data-only-of-a-channel">Delete the data-only of a Channel</a>
</li> <li> <a href="#accessing-channel-data-in-engine">Accessing Channel Data
in Engine</a> </li> </ul> </aside><hr/><a id="edit-page-link"
href="https://github.com/apache/incubator-predictionio/tree/livedoc/docs/manual/source/datacollection/channel.html.md.erb"><img
src="/images/icons/edit-pencil-d6c1bb3d.png"/>Edit this page</a></div><div
class="content-header hidden-sm hidden-xs"><div id="breadcrumbs"
class="hidden-sm hidden xs"><ul><li><a href="#">Collecting and Analyzing
Data</a><span class="spacer">></span></li><li><span
class="last">Channel</span></li></ul></div><div
id="page-title"><h1>Channel</h1></div></div><div cl
ass="content"> <p>Each App has a default channel (without name) which stores
all incoming events. This "default" one is used when channel is not
specified.</p><p>You may create additional Channels for the App. Creating
multiple Channels is advanced usage. You don't need to create any in order
to use Apache PredictionIO (incubating). The Channel is associated with one App
only and must have unique name within the same App.</p><p>Creating multiple
Channels allows you more easily to identify, manage and use specific event data
if you may collect events from different multiple sources (eg. mobile, website,
or third-party webhooks service) for the your application.</p><p>(More usage
details coming soon...)</p><h2 id='create-a-new-channel'
class='header-anchors'>Create a new Channel</h2><p>For example, to create a new
channel "myChannel" for app "myApp", run following
<code>pio</code> command:</p><div class="highlight shell"><table
style="border-spacing:
0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre
class="lineno">1</pre></td><td class="code"><pre>pio app channel-new myApp
myChannel
+<!DOCTYPE html><html><head><title>Channel</title><meta charset="utf-8"/><meta
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SDKs</span></a></li></ul></li></ul></li><li class="level-1"><a
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class="level-2"><a class="final" href="/deploy/"><span>Deploying as a Web
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="level-2"><a class="final" href="/deploy/engineparams/"><span>Setting Engine
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href="/deploy/plugin/"><span>Engine Server Plugin</span></a></li></ul></li><li
class="level-1"><a class="expandible" href="#"><span>Customizing an
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href="/customize/"><span>Learning DASE</span></a></li><li class="level-2"><a
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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="fi
nal" 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"
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href="/datacollection/webhooks/"><span>Unifying Multichannel Data with
Webhooks</span></a></li><li class="level-2"><a class="final active"
href="/datacollection/channel/"><span>Channel</span></a></li><li
class="level-2"><a class="final"
href="/datacollection/batchimport/"><span>Importing Data in
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href="/datacollection/analytics/"><span>Using Analytics
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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
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href="/algorithm/multiple/"><span>Combining Multiple
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href="/algorithm/custom/"><span>Adding Your Own
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href="#"><span>ML Tuning and Evaluation</span></a><ul><li class="level-2"><a
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Metrics</span></a></li><li class="level
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Metrics</span></a></li></ul></li><li class="level-1"><a class="expandible"
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class="final" href="/system/"><span>Architecture Overview</span></a></li><li
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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
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class="level-3"><a class="final"
href="/templates/recommendation/quickstart/"><span>Quick
Start</span></a></li><li class="level-3"><a class="final"
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><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
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>href="/templates/recommendation/customize-data-prep/"><span>Customize Data
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>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"
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="level-3"><a
class="final" href="/templates/similarproduct/quickstart/"><span>Quick
Start</span></a></li><li class="level-3"><a class="final" href="/templates/sim
ilarproduct/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
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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>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 Tutorial</span></a></li></ul></li><li
>class="level-1"><a class="expandible" href="/community/"><span>Getting
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>href="/community/contribute-code/"><span>Contribute Code</span></a></li><li
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>href="/community/contribute-documentation/"><span>Contribute
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>href="/community/contribute-sdk/"><span>Contribute a SDK</span></a></li><li
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>href="/community/contribute-webhook/"><span>Contribute a
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>href="/community/projects/"><span>Community Projects</span></a></l
i></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
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href="/resources/glossary/"><span>Glossary</span></a></li></ul></li><li
class="level-1"><a class="expandible" href="#"><span>Apache Software
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vel-2"><a class="final" href="https://www.apache.org/"><span>Apache
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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="#">Collecting and Analyzing Data</a><span
class="spacer">></span></li><li><span
class="last">Channel</span></li></ul></div><div
id="page-title"><h1>Channel</h1></div></div><div
id="table-of-content-wrapper"><h5>On this page</h5><aside
id="table-of-contents"><ul> <li> <
a href="#create-a-new-channel">Create a new Channel</a> </li> <li> <a
href="#collect-data-through-channel">Collect data through Channel</a> </li>
<li> <a href="#delete-a-channel-including-all-imported-data">Delete a Channel
(including all imported data)</a> </li> <li> <a
href="#delete-the-data-only-of-a-channel">Delete the data-only of a Channel</a>
</li> <li> <a href="#accessing-channel-data-in-engine">Accessing Channel Data
in Engine</a> </li> </ul> </aside><hr/><a id="edit-page-link"
href="https://github.com/apache/predictionio/tree/livedoc/docs/manual/source/datacollection/channel.html.md.erb"><img
src="/images/icons/edit-pencil-d6c1bb3d.png"/>Edit this page</a></div><div
class="content-header hidden-sm hidden-xs"><div id="breadcrumbs"
class="hidden-sm hidden xs"><ul><li><a href="#">Collecting and Analyzing
Data</a><span class="spacer">></span></li><li><span
class="last">Channel</span></li></ul></div><div
id="page-title"><h1>Channel</h1></div></div><div class="content"> <p>Ea
ch App has a default channel (without name) which stores all incoming events.
This "default" one is used when channel is not specified.</p><p>You
may create additional Channels for the App. Creating multiple Channels is
advanced usage. You don't need to create any in order to use Apache
PredictionIO. The Channel is associated with one App only and must have unique
name within the same App.</p><p>Creating multiple Channels allows you more
easily to identify, manage and use specific event data if you may collect
events from different multiple sources (eg. mobile, website, or third-party
webhooks service) for the your application.</p><p>(More usage details coming
soon...)</p><h2 id='create-a-new-channel' class='header-anchors'>Create a new
Channel</h2><p>For example, to create a new channel "myChannel" for
app "myApp", run following <code>pio</code> command:</p><div
class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td
class="gutter g
l" style="text-align: right"><pre class="lineno">1</pre></td><td
class="code"><pre>pio app channel-new myApp myChannel
</pre></td></tr></tbody></table> </div> <p>you should see something like the
following outputs:</p><div class="highlight shell"><table
style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align:
right"><pre class="lineno">1
2
3
@@ -12,7 +12,7 @@
[INFO] [App$] Channel Name: myChannel
[INFO] [App$] Channel ID: 2
[INFO] [App$] App ID: 5
-</span></pre></td></tr></tbody></table> </div> <p>Now "myChannel" is
created and ready for collecting data.</p><h2 id='collect-data-through-channel'
class='header-anchors'>Collect data through Channel</h2><p>The Event API
support optional <code>channel</code> query parameter. This allows you to
import and query events of the specified channel. When the <code>channel</code>
parameter is not specified, the data is collected through the default
channel.</p><p>URL:
<code>http://localhost:7070/events.json?accessKey=yourAccessKeyString&channel=yourChannelName</code></p><p>Query
parameters:</p> <table><thead> <tr> <th style="text-align: left">Field</th>
<th style="text-align: left">Type</th> <th style="text-align:
left">Description</th> </tr> </thead><tbody> <tr> <td style="text-align:
left"><code>accessKey</code></td> <td style="text-align: left">String</td> <td
style="text-align: left">The Access Key for your App</td> </tr> <tr> <td
style="text-align: left"><code>channel</c
ode></td> <td style="text-align: left">String</td> <td style="text-align:
left">The channel name (optional). Specify this to import data to this channel.
<strong>NOTE: supported in PIO version >= 0.9.2</strong> only. Channel must
be created first.</td> </tr> </tbody></table> <p>For SDK usage, one EventClient
should be responsible for collecting data of one specific channel. The channel
name is specified when the EventClient object is instantiated.</p><p>For
example, the following code import event to "YOUR_CHANNEL" of the
corresponding App.</p><div class="tabs"> <ul class="control"> <li
data-lang="bash"><a href="#tab-145d64f0-fa32-4a83-8e73-185b189ccec0">Raw
HTTP</a></li> <li data-lang="php"><a
href="#tab-3b2612ad-f343-4576-8136-1da0f6d99f25">PHP SDK</a></li> <li
data-lang="python"><a href="#tab-3f1624a3-01ba-47c5-9450-f28cd5139494">Python
SDK</a></li> <li data-lang="ruby"><a
href="#tab-315d12dd-4d74-46db-947b-2d37bb0a7906">Ruby SDK</a></li> <li
data-lang="java"><a href
="#tab-1f205fff-9b69-492e-b8a4-7d1fa3d2d7e7">Java SDK</a></li> </ul> <div
data-tab="Raw HTTP" data-lang="bash"
id="tab-145d64f0-fa32-4a83-8e73-185b189ccec0"> <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>Now "myChannel" is
created and ready for collecting data.</p><h2 id='collect-data-through-channel'
class='header-anchors'>Collect data through Channel</h2><p>The Event API
support optional <code>channel</code> query parameter. This allows you to
import and query events of the specified channel. When the <code>channel</code>
parameter is not specified, the data is collected through the default
channel.</p><p>URL:
<code>http://localhost:7070/events.json?accessKey=yourAccessKeyString&channel=yourChannelName</code></p><p>Query
parameters:</p> <table><thead> <tr> <th style="text-align: left">Field</th>
<th style="text-align: left">Type</th> <th style="text-align:
left">Description</th> </tr> </thead><tbody> <tr> <td style="text-align:
left"><code>accessKey</code></td> <td style="text-align: left">String</td> <td
style="text-align: left">The Access Key for your App</td> </tr> <tr> <td
style="text-align: left"><code>channel</c
ode></td> <td style="text-align: left">String</td> <td style="text-align:
left">The channel name (optional). Specify this to import data to this channel.
<strong>NOTE: supported in PIO version >= 0.9.2</strong> only. Channel must
be created first.</td> </tr> </tbody></table> <p>For SDK usage, one EventClient
should be responsible for collecting data of one specific channel. The channel
name is specified when the EventClient object is instantiated.</p><p>For
example, the following code import event to "YOUR_CHANNEL" of the
corresponding App.</p><div class="tabs"> <ul class="control"> <li
data-lang="bash"><a href="#tab-60f06214-0f5d-459c-b6fe-8837278147c6">Raw
HTTP</a></li> <li data-lang="php"><a
href="#tab-50ddc9e3-6594-4421-858b-34b73cb9c465">PHP SDK</a></li> <li
data-lang="python"><a href="#tab-3fad87a0-7aa1-4fb0-a39c-1ca94f7a5a93">Python
SDK</a></li> <li data-lang="ruby"><a
href="#tab-d27071ae-824b-4290-822f-2cbb6d25c9d8">Ruby SDK</a></li> <li
data-lang="java"><a href
="#tab-d2fa3360-5085-44d7-a737-ab18bf9004a6">Java SDK</a></li> </ul> <div
data-tab="Raw HTTP" data-lang="bash"
id="tab-60f06214-0f5d-459c-b6fe-8837278147c6"> <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
@@ -39,7 +39,7 @@
},
"eventTime" : "2004-12-13T21:39:45.618Z"
}'</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="PHP SDK"
data-lang="php" id="tab-3b2612ad-f343-4576-8136-1da0f6d99f25"> (TODO: update
me) </div> <div data-tab="Python SDK" data-lang="python"
id="tab-3f1624a3-01ba-47c5-9450-f28cd5139494"> <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="PHP SDK"
data-lang="php" id="tab-50ddc9e3-6594-4421-858b-34b73cb9c465"> (TODO: update
me) </div> <div data-tab="Python SDK" data-lang="python"
id="tab-3fad87a0-7aa1-4fb0-a39c-1ca94f7a5a93"> <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
@@ -80,7 +80,7 @@
<span class="n">properties</span><span class="o">=</span><span
class="n">event_properties</span><span class="p">,</span>
<span class="n">event_time</span><span class="o">=</span><span
class="n">datetime</span><span class="p">(</span><span
class="mi">2014</span><span class="p">,</span> <span class="mi">12</span><span
class="p">,</span> <span class="mi">13</span><span class="p">,</span> <span
class="mi">21</span><span class="p">,</span> <span class="mi">38</span><span
class="p">,</span> <span class="mi">45</span><span class="p">,</span> <span
class="mi">618000</span><span class="p">,</span> <span
class="n">pytz</span><span class="o">.</span><span class="n">utc</span><span
class="p">))</span>
-</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Ruby SDK"
data-lang="ruby" id="tab-315d12dd-4d74-46db-947b-2d37bb0a7906"> (TODO: update
me) </div> <div data-tab="Java SDK" data-lang="java"
id="tab-1f205fff-9b69-492e-b8a4-7d1fa3d2d7e7"> <div class="highlight java">
<table style="border-spacing: 0"><tbody><tr> <td class="gutter gl"
style="text-align: right"><pre class="lineno">1</pre></td> <td
class="code"><pre><span class="o">(</span><span class="n">coming</span> <span
class="n">soon</span><span class="o">)</span>
+</pre></td> </tr></tbody></table> </div> </div> <div data-tab="Ruby SDK"
data-lang="ruby" id="tab-d27071ae-824b-4290-822f-2cbb6d25c9d8"> (TODO: update
me) </div> <div data-tab="Java SDK" data-lang="java"
id="tab-d2fa3360-5085-44d7-a737-ab18bf9004a6"> <div class="highlight java">
<table style="border-spacing: 0"><tbody><tr> <td class="gutter gl"
style="text-align: right"><pre class="lineno">1</pre></td> <td
class="code"><pre><span class="o">(</span><span class="n">coming</span> <span
class="n">soon</span><span class="o">)</span>
</pre></td> </tr></tbody></table> </div> </div> </div> <p>You can also follow
the EventAPI <a href="/datacollection/eventapi/#debugging-recipes">debug
receipts</a> to query the events of specific channel by adding the
<code>channel</code> query parameter in the URL.</p><h2
id='delete-a-channel-(including-all-imported-data)'
class='header-anchors'>Delete a Channel (including all imported data)</h2><div
class="highlight shell"><table style="border-spacing: 0"><tbody><tr><td
class="gutter gl" style="text-align: right"><pre class="lineno">1</pre></td><td
class="code"><pre>pio app channel-delete <app name> <channel name>
</pre></td></tr></tbody></table> </div> <h2
id='delete-the-data-only-of-a-channel' class='header-anchors'>Delete the
data-only of a Channel</h2><div class="highlight shell"><table
style="border-spacing: 0"><tbody><tr><td class="gutter gl" style="text-align:
right"><pre class="lineno">1</pre></td><td class="code"><pre>pio app
data-delete <app name> --channel <channel name>
</pre></td></tr></tbody></table> </div> <h2
id='accessing-channel-data-in-engine' class='header-anchors'>Accessing Channel
Data in Engine</h2><p>To acccess channel data, simply specify the channel name
when use the PEventStore or LEventStore API. Data is read from from the default
channel if channelName is not specified.</p><p>For example, read data from
default channel:</p><div class="highlight scala"><table style="border-spacing:
0"><tbody><tr><td class="gutter gl" style="text-align: right"><pre
class="lineno">1
@@ -115,7 +115,7 @@
</span> <span class="c1">// targetEntityType is optional field of an
event.
</span> <span class="n">targetEntityType</span> <span class="k">=</span>
<span class="nc">Some</span><span class="o">(</span><span
class="nc">Some</span><span class="o">(</span><span
class="s">"item"</span><span class="o">)))(</span><span
class="n">sc</span><span class="o">)</span>
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