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<?xml version="1.0"?>
<page xmlns="http://projectmallard.org/1.0/"
type="topic"
style="function"
xmlns:api="http://projectmallard.org/experimental/api/"
xmlns:ui="http://projectmallard.org/experimental/ui/"
id="mongoc_apm_set_command_started_cb">
<info>
<link type="guide" xref="mongoc_apm_callbacks_t" group="function"/>
</info>
<title>mongoc_apm_set_command_started_cb()</title>
<section id="synopsis">
<title>Synopsis</title>
<synopsis><code mime="text/x-csrc"><![CDATA[typedef void
(*mongoc_apm_command_started_cb_t) (const mongoc_apm_command_started_t *event);
void
mongoc_apm_set_command_started_cb (mongoc_apm_callbacks_t *callbacks,
mongoc_apm_command_started_cb_t cb);
]]></code></synopsis>
<p>Receive an event notification whenever the driver starts a MongoDB operation.</p>
<p>See <link xref="application-performance-monitoring">Introduction to Application Performance Monitoring</link>.</p>
</section>
<section id="parameters">
<title>Parameters</title>
<table>
<tr><td><p>callbacks</p></td><td><p>A <code xref="mongoc_apm_callbacks_t">mongoc_apm_callbacks_t</code>.</p></td></tr>
<tr><td><p>cb</p></td><td><p>A function to call with a <code xref="mongoc_apm_command_started_t">mongoc_apm_command_started_t</code> whenever the driver begins a MongoDB operation.</p></td></tr>
</table>
</section>
</page>
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