<h4>Pre-Submission Checklist</h4>
<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Commit message has the format required by CONTRIBUTING guide</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Commits are split per component (core, individual modules, libs, utils, ...)</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Each component has a single commit (if not, squash them into one commit)</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> No commits to README files for modules (changes must be done to docbook files<br>
in <code>doc/</code> subfolder, the README file is autogenerated)</li>
</ul>
<h4>Type Of Change</h4>
<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Small bug fix (non-breaking change which fixes an issue)</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> New feature (non-breaking change which adds new functionality)</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Breaking change (fix or feature that would change existing functionality)</li>
</ul>
<h4>Checklist:</h4>

<ul class="contains-task-list">
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> PR should be backported to stable branches</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Tested changes locally</li>
<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Related to issue #XXXX (replace XXXX with an open issue number)</li>
</ul>
<h4>Description</h4>
<p>I use dialog module and want to export current active calls with custom labels.<br>
I need to decrement the counter value when a call is terminated.<br>
<code>prom_counter_dec</code> add this functionality.</p>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>  <a href='https://github.com/kamailio/kamailio/pull/2858'>https://github.com/kamailio/kamailio/pull/2858</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>xhttp_prom: introduced prom_counter_update</li>
  <li>xhttp_prom: replaced prom_counter_inc by prom_counter_update</li>
  <li>xhttp_prom: added prom_counter_dec function</li>
  <li>xhttp_prom: added rpc_prom_counter_dec</li>
  <li>xhttp_prom: counter_dec published via KEMI interface</li>
  <li>xhttp_prom: docbook - fixed 'Document root element "chapter", must match DOCTYPE root "book".'</li>
  <li>xhttp_prom: docubook ulink elementdo not alloed inside listitem element</li>
  <li>xhttp_prom: docbook para element not allowed inside another para element</li>
  <li>xhttp_prom: docbook files space formating</li>
  <li>xhttp_prom: added prom_counter_dec docbook description</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/2858/files#diff-91311ad68785f1bacb9e5eb968b4215cc1f7e82fe8980257ded11b65af721f64">src/modules/xhttp_prom/doc/xhttp_prom_admin.xml</a>
    (1151)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/2858/files#diff-3234c6053b9b93dc271b84392d97cc1c0900a4b4a5b1d62edf71bd48918449c3">src/modules/xhttp_prom/prom_metric.c</a>
    (29)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/2858/files#diff-05755185d57a498255c2cc8ec566f376759fafa26f6990fdc31fcebd2bca7048">src/modules/xhttp_prom/prom_metric.h</a>
    (4)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/2858/files#diff-32d32ae03e4ba537cd723ac3b4f8c6f8329254b42791da5d8e9dda47a8767886">src/modules/xhttp_prom/xhttp_prom.c</a>
    (324)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/2858/files#diff-254318ead3a527a75c23b29d65d0f15fd7acf1ff1126b25fb83e020c4605dfb4">src/modules/xhttp_prom/xhttp_prom.h</a>
    (9)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/kamailio/kamailio/pull/2858.patch'>https://github.com/kamailio/kamailio/pull/2858.patch</a></li>
  <li><a href='https://github.com/kamailio/kamailio/pull/2858.diff'>https://github.com/kamailio/kamailio/pull/2858.diff</a></li>
</ul>

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