Class EmptyMetricData

java.lang.Object

io.opentelemetry.sdk.metrics.internal.aggregator.EmptyMetricData

All Implemented Interfaces:

MetricData

public final class EmptyMetricData
extends Object
implements MetricData

This class is internal and is hence not for public use. Its APIs are unstable and can change at any time.

Field Summary

Fields

Modifier and Type	Field	Description
private static final EmptyMetricData	INSTANCE

Constructor Summary

Constructors

Modifier	Constructor	Description
private	EmptyMetricData()

Method Summary

Modifier and Type	Method	Description
Data<?>	getData()	Returns the unconstrained metric data.
String	getDescription()	Returns the metric description.
static MetricData	getInstance()	Get an empty instance of metric data.
InstrumentationScopeInfo	getInstrumentationScopeInfo()	Returns the metric InstrumentationScopeInfo.
String	getName()	Returns the metric name.
Resource	getResource()	Returns the metric Resource.
MetricDataType	getType()	Returns the type of this metric.
String	getUnit()	Returns the metric unit.
boolean	isEmpty()	Returns true if there are no points associated with this metric.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface MetricData

getDoubleGaugeData, getDoubleSumData, getExponentialHistogramData, getHistogramData, getLongGaugeData, getLongSumData, getSummaryData

Field Details

INSTANCE

private static final EmptyMetricData INSTANCE

Constructor Details

EmptyMetricData

private EmptyMetricData()

Method Details

getInstance

public static MetricData getInstance()

Get an empty instance of metric data. Empty metric data should not be used except as an indication that recordings were dropped via Aggregation.drop().

Returns:

an empty MetricData.

getResource

public Resource getResource()

Description copied from interface: MetricData

Returns the metric Resource.

The Resource is configured via SdkMeterProviderBuilder.setResource(Resource).

Specified by:

getResource in interface MetricData

getInstrumentationScopeInfo

public InstrumentationScopeInfo getInstrumentationScopeInfo()

Description copied from interface: MetricData

Returns the metric InstrumentationScopeInfo.

The InstrumentationScopeInfo is determined from the options used when MeterBuilder.build()ing the Meter.

Specified by:

getInstrumentationScopeInfo in interface MetricData

getName

public String getName()

Description copied from interface: MetricData

Returns the metric name.

The metric name is typically the instrument name, but may be optionally overridden by a View.

Specified by:

getName in interface MetricData

getDescription

public String getDescription()

Description copied from interface: MetricData

Returns the metric description.

The metric name is typically the instrument description, but may be optionally overridden by a View.

Specified by:

getDescription in interface MetricData

getUnit

public String getUnit()

Description copied from interface: MetricData

Returns the metric unit.

Specified by:

getUnit in interface MetricData

getType

public MetricDataType getType()

Description copied from interface: MetricData

Returns the type of this metric.

Specified by:

getType in interface MetricData

getData

public Data<?> getData()

Description copied from interface: MetricData

Returns the unconstrained metric data.

Most will instead prefer to access the constrained metric data after first checking the MetricData.getType():

//  if (metricData.getType() == MetricDataType.LONG_SUM) {
//    SumData<LongPointData> sumData = metricData.getLongSumData();
//    ... // Process long sum data
//  }

Specified by:

getData in interface MetricData

See Also:

• MetricData.getDoubleGaugeData()
• MetricData.getLongGaugeData()
• MetricData.getDoubleSumData()
• MetricData.getLongSumData()
• MetricData.getHistogramData()
• MetricData.getSummaryData()

isEmpty

public boolean isEmpty()

Description copied from interface: MetricData

Returns true if there are no points associated with this metric.

Specified by:

isEmpty in interface MetricData