Sets up a function that will be called whenever a metric collection is initiated.
If the function is already in the list of callbacks for this Observable, the function is not added a second time.
Only the associated observables can be observed in the callback. Measurements of observables that are not associated observed in the callback are dropped.
the batch observable callback
the observables associated with this batch observable callback
Creates a new Counter metric. Generally, this kind of metric when the
value is a quantity, the sum is of primary interest, and the event count
and value distribution are not of primary interest.
the name of the metric.
Creates and returns a new Gauge.
the name of the metric.
Creates and returns a new Histogram.
the name of the metric.
Creates a new ObservableCounter metric.
The callback SHOULD be safe to be invoked concurrently.
the name of the metric.
Creates a new ObservableGauge metric.
The callback SHOULD be safe to be invoked concurrently.
the name of the metric.
Creates a new ObservableUpDownCounter metric.
The callback SHOULD be safe to be invoked concurrently.
the name of the metric.
Creates a new UpDownCounter metric. UpDownCounter is a synchronous
instrument and very similar to Counter except that Add(increment)
supports negative increments. It is generally useful for capturing changes
in an amount of resources used, or any quantity that rises and falls
during a request.
Example uses for UpDownCounter:
the name of the metric.
Removes a callback previously registered with Meter.addBatchObservableCallback.
The callback to be removed is identified using a combination of the callback itself, and the set of the observables associated with it.
the batch observable callback
the observables associated with this batch observable callback
Generated using TypeDoc
An interface to allow the recording metrics.
{@link Metric}s are used for recording pre-defined aggregation (
Counter), or raw values (Histogram) in which the aggregation and attributes for the exported metric are deferred.1.3.0