<div dir="ltr">thanks. yes, these links are what got me started. it looks like for my problem, gproc (or maybe gp2) is a good solution.</div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/11/13 Mark DeVilliers <span dir="ltr"><<a href="mailto:Mark.deVilliers@aeriandi.com" target="_blank">Mark.deVilliers@aeriandi.com</a>></span><br>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Does this help -
</span><a href="http://steve.vinoski.net/blog/2011/03/23/dont-lose-your-ets-tables/" target="_blank">http://steve.vinoski.net/blog/2011/03/23/dont-lose-your-ets-tables/</a> and
<a href="http://steve.vinoski.net/blog/2013/05/08/implementation-of-dont-lose-your-ets-tables/" target="_blank">
http://steve.vinoski.net/blog/2013/05/08/implementation-of-dont-lose-your-ets-tables/</a><u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Mark<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <a href="mailto:erlang-questions-bounces@erlang.org" target="_blank">erlang-questions-bounces@erlang.org</a> [mailto:<a href="mailto:erlang-questions-bounces@erlang.org" target="_blank">erlang-questions-bounces@erlang.org</a>]
<b>On Behalf Of </b>Barco You<br>
<b>Sent:</b> 13 November 2013 05:20<br>
<b>To:</b> akonsu<br>
<b>Cc:</b> erlang-questions<br>
<b>Subject:</b> Re: [erlang-questions] ETS tables and pubsub<u></u><u></u></span></p><div><div class="h5">
<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Why don't you use gproc?<u></u><u></u></p>
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<p class="MsoNormal">On Wed, Nov 13, 2013 at 2:38 AM, akonsu <<a href="mailto:akonsu@gmail.com" target="_blank">akonsu@gmail.com</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal">I have a pubsub system which has a single publisher process that maintains all its subscriber processes' Pid's in an ETS table.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">The publisher monitors its subscribers and when the publisher receives DOWN message, it removes the subscriber Pid from the table.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">The table entries are tuples of the form {MonitorRef, SubscriberPid}, and the MonitorRef is used as the key.<u></u><u></u></p>
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<p class="MsoNormal">Now I would like to make sure that if the publisher dies, and gets restarted by its supervisor, the subscriber table is preserved. So I created a process that creates the ETS table, sets the table's heir to self(), and then gives away the
table to the publisher.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">The problem is that I do not know how to handle transfer of the table from the heir to the publisher:<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">when publisher receives the table, the table contains a list of tuples {MonitorRef, SubscriberPid}, but the MonitorRefs were created by the previous publisher instance, so when the new publisher receives ETS_TRANSFER it needs to monitor
all these SubscriberPids again.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">what is the best way to do it? Loop over all ETS entries, attach a monitor to each and reenter the new MonitorRefs into the table? This might be slow, no? Maybe my architecture can be improved? Any advice?<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">thanks<u></u><u></u></p>
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<p class="MsoNormal">Konstantin<u></u><u></u></p>
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