[#BloombergLP-bdlm-MetricsAdapter-registerCollectionCallback]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlm.adoc[bdlm]::xref:BloombergLP/bdlm/MetricsAdapter.adoc[MetricsAdapter]::registerCollectionCallback
:relfileprefix: ../../../
:mrdocs:

Register the specified `callback` with a monitoring system, using the specified `metricDescriptor` for the registration. Return the callback handle to be used with `removeCollectionCallback`. Note the information used for registration is implementation dependant, and may involve values computed from the supplied arguments.

== Synopsis

Declared in `<bdlm_metricsadapter.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
xref:BloombergLP/bdlm/MetricsAdapter/CallbackHandle.adoc[CallbackHandle]
registerCollectionCallback(
    xref:BloombergLP/bdlm/MetricDescriptor.adoc[MetricDescriptor] const& metricDescriptor,
    xref:BloombergLP/bdlm/MetricsAdapter/Callback.adoc[Callback] const& callback) = 0;
----


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