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<p style="margin-top:0;margin-bottom:0">1) You can use the multicast strategy:</p>
<p style="margin-top:0;margin-bottom:0"><span>nfdc strategy set prefix /<span>notificiation</span> strategy /localhost/nfd/strategy/multicast</span></p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0">2) Notification stream can be used in applications by using the dispatcher (NFD uses the dispatcher):</p>
<p style="margin-top:0;margin-bottom:0"><a href="https://github.com/named-data/ndn-cxx/blob/master/src/mgmt/dispatcher.hpp" class="OWAAutoLink" id="LPlnk351267" previewremoved="true">https://github.com/named-data/ndn-cxx/blob/master/src/mgmt/dispatcher.hpp</a>.</p>
<p style="margin-top:0;margin-bottom:0">Producer example:</p>
<p style="margin-top:0;margin-bottom:0"><span>(<span>ndn::mgmt::PostNotification</span>) m_postNotification = m_dispatcher.addNotificationStream("insert"); m_dispatcher.addTopPrefix(Name("test"));</span></p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0">When producer wants to post a notification:<br>
<span></span></p>
<p style="margin-top:0;margin-bottom:0"><span>m_postNotification(data.wireEncode());</span><br>
</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0">For consumer, use the notification subscriber (I provided Data for the template):</p>
<p style="margin-top:0;margin-bottom:0"><a href="https://github.com/named-data/ndn-cxx/blob/master/src/util/notification-subscriber.hpp" class="OWAAutoLink" id="LPlnk245038" previewremoved="true">https://github.com/named-data/ndn-cxx/blob/master/src/util/notification-subscriber.hpp</a></p>
<p style="margin-top:0;margin-bottom:0">(Note: a crucial requirement I missed when I was using it:</p>
<p style="margin-top:0;margin-bottom:0"><a href="https://github.com/named-data/ndn-cxx/blob/master/src/util/notification-subscriber.hpp#L49" class="OWAAutoLink" id="LPlnk755191" previewremoved="true">https://github.com/named-data/ndn-cxx/blob/master/src/util/notification-subscriber.hpp#L49</a>)<br>
</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0">If you are still looking for pub-sub, PSync library is ready to use:</p>
<p style="margin-top:0;margin-bottom:0"><a href="https://gerrit.named-data.net/#/c/PSync/+/4824/" class="OWAAutoLink" id="LPlnk328341" previewremoved="true">https://gerrit.named-data.net/#/c/PSync/+/4824/</a><br>
</p>
<p style="margin-top:0;margin-bottom:0">I still have to implement segmentation for hello data and sync data for partial sync for bigger sized data. I will do that once the initial code is merge (<a href="https://redmine.named-data.net/issues/4662" class="OWAAutoLink" id="LPlnk634550" previewremoved="true">https://redmine.named-data.net/issues/4662)</a></p>
<p style="margin-top:0;margin-bottom:0">Any issues welcome on the redmine:</p>
<p style="margin-top:0;margin-bottom:0"><a href="https://redmine.named-data.net/projects/psync/issues" class="OWAAutoLink" id="LPlnk358294" previewremoved="true">https://redmine.named-data.net/projects/psync/issues</a><br>
</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0">Ashlesh<br>
</p>
</div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Nfd-dev <nfd-dev-bounces@lists.cs.ucla.edu> on behalf of Lee, Jongdeog <jlee700@illinois.edu><br>
<b>Sent:</b> Thursday, July 26, 2018 8:32:36 PM<br>
<b>To:</b> nfd-dev@lists.cs.ucla.edu<br>
<b>Subject:</b> [Nfd-dev] Push function in NDN</font>
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<div>
<div style="direction:ltr; font-family:Tahoma; color:#000000; font-size:10pt">
<div style="font-family:Tahoma; font-size:13px">
<div style="font-family:Tahoma; font-size:13px">
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<span style="text-align:right; color:rgb(0,0,0); font-size:10pt; font-family:Tahoma">Dear NDN folks</span><span style="text-align:right; color:rgb(0,0,0); font-size:10pt; font-family:Tahoma">,</span></div>
</div>
</div>
</div>
</div>
<div id="x_divBdy" class="x_bdyItmPrt" style="font-size:medium; word-wrap:break-word; width:auto; overflow:hidden; top:-5px; padding:0px 15px 15px 0px; clear:both; font-family:"Segoe UI",Helvetica,Arial,sans-serif">
<div dir="ltr"><font face="Tahoma" size="2" color="black"><span dir="ltr" style="font-size:10pt">
<div> Hope all is well.</div>
<div> I have a question about a push function (from one publisher to multiple subscribers) in NDN. </div>
<div><br>
</div>
<div>1. It seems the simplest way to implement such function is to send one interest packet to multiple producers. However, NFD only forwards one interest to one producer by default.<br>
</div>
<div> Is there any way to multicast one interest? <br>
</div>
<div> For example, if three producers advertise same prefix '/notification' and one consumer issues interest '/notificiation/1', I would like to send the interest to all three producers.<br>
</div>
<div><br>
</div>
<div>2. Junxiao mentioned there is notification stream in NFD that keeps update NFD status info. Is it usable in application layer as well? (like consumer-producer model). If then, is there any example code for that?</div>
<div><br>
</div>
<div> Thanks for reading!</div>
<div><br>
</div>
<div>Best wishes,<br>
<div><font size="1"><span style="font-size:13px">
<div>Jongdeog Lee (JD)</div>
<div><br>
</div>
<div>------------------------------------------------</div>
<div><i>Ph.D. Student</i></div>
<div><i>Department of Computer Science</i></div>
<div><i>University of Illinois at Urbana-Champaign</i></div>
</span></font></div>
</div>
</span></font></div>
</div>
</div>
</div>
</div>
</div>
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