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<td id="header-avatar-image-container" valign="top" style="padding: 0px; border-collapse: collapse; vertical-align: top; width: 32px; padding-right: 9px"><a href="https://wiki.asterisk.org/wiki/display/~mmichelson?src=email" style="color: #3b73af; text-decoration: none"><img id="header-avatar-image" class="image_fix" src="cid:avatar_99ed0aa29d6f204db4785296f8170422" height="32" width="32" border="0" style="border-radius: 3px; vertical-align: top" /></a></td>
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<td class="content-excerpt-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 0 24px"> <p style="margin: 10px 0 0 0; margin-top: 0">As explained on the parent page, the current pubsub API in res_pjsip_pubsub does not abstract away the underlying stack well enough. This page details the current problems and how they should be fixed.</p> <h1 id="PJSIPSubscriptionAbstractionPlan-Tweakstoast_sip_subscription" style="margin: 10px 0 0 0; font-size: 24px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0">Tweaks to <code style="font-family: monospace">ast_sip_subscription</code> </h1> <p style="margin: 10px 0 0 0">One really really truly nice thing about <code style="font-family: monospace">ast_sip_subscription</code> is that it is already an opaque structure, so it is simple to make changes.</p> <p style="margin: 10px 0 0 0"> <code style="font-family: monospace">ast_sip_subscription</code> currently assumes that all subscriptions align with an actual SUBSCRIBE dialog within PJSIP, like the following:</p> <p style="margin: 10px 0 0 0"> <span id="gliffy-container-29229066-7420" class="gliffy-container " data-fullwidth="705" data-ceoid="28934231" data-filename="simple_subscription"> <span class="gliffy-chrome-container"> <span class="gliffy-chrome "> <span class="gliffy-item gliffy-first"> <img class="gliffy-logo" src="/wiki/download/resources/com.gliffy.integration.confluence/icons/logo_16x16.png" title="Gliffy" alt="Gliffy" /> Gliffy </span> </span> </span> <map id="gliffy-map-29229066-4702" name="gliffy-map-29229066-4702"></map> <img id="gliffy-image-29229066-7420" class="gliffy-image " width="705" height="442" data-full-width="705" data-full-height="442" src="/wiki/download/attachments/28934231/simple_subscription.png?version=1&modificationDate=1401404179075&api=v2" alt="simple_subscription" usemap="#gliffy-map-29229066-4702" /> <map id="gliffy-dynamic-map-29229066-7420" class="gliffy-dynamic" name="gliffy-dynamic-map-29229066-7420"></map> </span> </p> <p style="margin: 10px 0 0 0">With RLS, <code style="font-family: monospace">ast_sip_subscription</code> needs to be able to form a tree of subscriptions, with a "real" list subscription at the root of the tree and "virtual" leaf subscriptions, like the following:</p> <p style="margin: 10px 0 0 0"> </p> <h1 id="PJSIPSubscriptionAbstractionPlan-GeneralAPIchanges" style="margin: 10px 0 0 0; font-size: 24px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0">General API changes</h1> <h1 id="PJSIPSubscriptionAbstractionPlan-Changestonotifierusage" style="margin: 10px 0 0 0; font-size: 24px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0">Changes to notifier usage</h1> <h1 id="PJSIPSubscriptionAbstractionPlan-Changestosubscriberusage" style="margin: 10px 0 0 0; font-size: 24px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0">Changes to subscriber usage</h1> <h1 id="PJSIPSubscriptionAbstractionPlan-Changestopublisherusage" style="margin: 10px 0 0 0; font-size: 24px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0">Changes to publisher usage</h1> </td>
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