[#BloombergLP-bdlm-MetricDescriptor-2constructor-03]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlm.adoc[bdlm]::xref:BloombergLP/bdlm/MetricDescriptor.adoc[MetricDescriptor]::MetricDescriptor
:relfileprefix: ../../../
:mrdocs:

Create an object of this class having the specified attribute values.

== Synopsis

Declared in `<bdlm_metricdescriptor.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
MetricDescriptor(
    std::string_view const& metricNamespace,
    std::string_view const& metricName,
    xref:BloombergLP/bdlm/InstanceCount/Value.adoc[InstanceCount::Value] instanceNumber,
    std::string_view const& objectTypeName,
    std::string_view const& objectTypeAbbreviation,
    std::string_view const& objectIdentifier,
    xref:BloombergLP/bslma/Allocator.adoc[bslma::Allocator]* basicAllocator = 0);
----

== Description

The attributes are the specified `metricNamespace`, `metricName`, `instanceNumber`, `objectTypeName`, `objectTypeAbbreviation`, and `objectIdentifier`. Optionally specify a `basicAllocator` used to supply memory. If `basicAllocator` is 0, the currently installed default allocator is used. Note that implementations of the `bdlm::MetricsAdapter` protocal will typically use an implementation specific value for the namespace attribute when `metricNamespace == k_USE_METRICS_ADAPTER_NAMESPACE_SELECTION` and the object identifier attribute when `objectIdentrifier == k_USE_METRICS_ADAPTER_OBJECT_ID_SELECTION`.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *metricNamespace*
| grouping value for published metrics
| *metricName*
| name of the metric
| *instanceNumber*
| instance number of the object generating the metric
| *objectTypeName*
| name of the type generating the metric
| *objectTypeAbbreviation*
| abbreviation for the type generating the metric
| *objectIdentifier*
| application unique identifier for the metric
| *basicAllocator*
| memory allocator; null uses the default
|===


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