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<h1 class="page">Event collection</h1>
<div class="sect1">
<h2 id="_motivation"><a class="anchor" href="#_motivation"></a>Motivation</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Many calendar application do add events invitation received by email directly in ones calendar.</p>
</div>
<div class="paragraph">
<p>Such behaviours requires the calendar application to be aware of the ICalendar related emails a user received.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_design"><a class="anchor" href="#_design"></a>Design</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The idea is to write a portion of mailet pipeline extracting Icalendar attachments and to hold them as attachments that
can later be sent to other applications over AMQP to be treated in an asynchronous, decoupled fashion.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_configuration"><a class="anchor" href="#_configuration"></a>Configuration</h2>
<div class="sectionbody">
<div class="paragraph">
<p>We can achieve this goal by combining simple mailets building blocks.</p>
</div>
<div class="paragraph">
<p>Here is a sample pipeline achieving aforementioned objectives :</p>
</div>
<div class="literalblock">
<div class="content">
<pre>&lt;!-- ICAL pipeline --&gt;
&lt;mailet match="All" class="StripAttachment"&gt;
&lt;mimeType&gt;text/calendar&lt;/mimeType&gt;
&lt;attribute&gt;rawIcalendar&lt;/attribute&gt;
&lt;/mailet&gt;
&lt;mailet match="All" class="MimeDecodingMailet"&gt;
&lt;attribute&gt;rawIcalendar&lt;/attribute&gt;
&lt;/mailet&gt;
&lt;mailet match="All" class="ICalendarParser"&gt;
&lt;sourceAttribute&gt;rawIcalendar&lt;/sourceAttribute&gt;
&lt;destinationAttribute&gt;icalendar&lt;/destinationAttribute&gt;
&lt;/mailet&gt;
&lt;mailet match="All" class="ICALToHeader"&gt;
&lt;attribute&gt;icalendar&lt;/attribute&gt;
&lt;/mailet&gt;
&lt;mailet match="All" class="ICALToJsonAttribute"&gt;
&lt;source&gt;icalendar&lt;/source&gt;
&lt;destination&gt;icalendarAsJson&lt;/destination&gt;
&lt;rawSource&gt;rawIcalendar&lt;/rawSource&gt;
&lt;/mailet&gt;
&lt;mailet match="All" class="AmqpForwardAttribute"&gt;
&lt;uri&gt;amqp://${env:JAMES_AMQP_USERNAME}:${env:JAMES_AMQP_PASSWORD}@${env:JAMES_AMQP_HOST}:${env:JAMES_AMQP_PORT}&lt;/uri&gt;
&lt;exchange&gt;james:events&lt;/exchange&gt;
&lt;attribute&gt;icalendarAsJson&lt;/attribute&gt;
&lt;/mailet&gt;
&lt;!-- End of ICAL pipeline --&gt;</pre>
</div>
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<div class="paragraph">
<p>A sample message looks like:</p>
</div>
<div class="literalblock">
<div class="content">
<pre>{
"ical": "RAW_DATA_AS_TEXT_FOLLOWING_ICS_FORMAT",
"sender": "other@james.apache.org",
"recipient": "any@james2.apache.org",
"replyTo": "other@james.apache.org",
"uid": "f1514f44bf39311568d640727cff54e819573448d09d2e5677987ff29caa01a9e047feb2aab16e43439a608f28671ab7c10e754ce92be513f8e04ae9ff15e65a9819cf285a6962bc",
"dtstamp": "20170106T115036Z",
"method": "REQUEST",
"sequence": "0",
"recurrence-id": null
}</pre>
</div>
</div>
<div class="paragraph">
<p>The following pipeline positions the X-MEETING-UID in the Header in order for mail user agent to correlate events with this mail.
The sample look like:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-none hljs">X-MEETING-UID: f1514f44bf39311568d640727cff54e819573448d09d2e5677987ff29caa01a9e047feb2aab16e43439a608f28671ab7c10e754ce92be513f8e04ae9ff15e65a9819cf285a6962bc</code></pre>
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