io.opentelemetry.sdk.metrics.aggregator

Class LongLastValueAggregator

java.lang.Object

io.opentelemetry.sdk.metrics.aggregator.LongLastValueAggregator

All Implemented Interfaces:

Aggregator

public final class LongLastValueAggregator
extends Object

Aggregator that aggregates recorded values by storing the last recorded value.

Limitation: The current implementation does not store a time when the value was recorded, so merging multiple LastValueAggregators will not preserve the ordering of records. This is not a problem because LastValueAggregator is currently only available for Observers which record all values once.

Constructor Summary

Constructors

Constructor and Description
LongLastValueAggregator()

Method Summary

Modifier and Type	Method and Description
protected void	doRecordDouble(double value) Concrete Aggregator instances should implement this method in order support recordings of double values.
void	doRecordLong(long value) Concrete Aggregator instances should implement this method in order support recordings of long values.
static AggregatorFactory	getFactory() Returns an AggregatorFactory that produces LongLastValueAggregator instances.
boolean	hasRecordings() Whether there have been any recordings since this aggregator has been reset.
void	mergeToAndReset(Aggregator other) Merges the current value into the given aggregator and resets the current value in this Aggregator.
void	recordDouble(double value) Updates the current aggregator with a newly recorded double value.
void	recordLong(long value) Updates the current aggregator with a newly recorded long value.
MetricData.Point	toPoint(long startEpochNanos, long epochNanos, io.opentelemetry.common.Labels labels) Returns the Point with the given properties and the value from this Aggregation.

Methods inherited from class java.lang.Object

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

Constructor Detail

LongLastValueAggregator

public LongLastValueAggregator()

Method Detail

getFactory

public static AggregatorFactory getFactory()

Returns an AggregatorFactory that produces LongLastValueAggregator instances.

Returns:

an AggregatorFactory that produces LongLastValueAggregator instances.

toPoint

@Nullable
public MetricData.Point toPoint(long startEpochNanos,
                                          long epochNanos,
                                          io.opentelemetry.common.Labels labels)

Description copied from interface: Aggregator

Returns the Point with the given properties and the value from this Aggregation.

Parameters:

startEpochNanos - the startEpochNanos for the Point.

epochNanos - the epochNanos for the Point.

labels - the labels for the Point.

Returns:

the Point with the value from this Aggregation.

doRecordLong

public void doRecordLong(long value)

Concrete Aggregator instances should implement this method in order support recordings of long values.

mergeToAndReset

public void mergeToAndReset(Aggregator other)

Description copied from interface: Aggregator

Merges the current value into the given aggregator and resets the current value in this Aggregator.

Specified by:

mergeToAndReset in interface Aggregator

Parameters:

other - value to merge into.

recordLong

public final void recordLong(long value)

Description copied from interface: Aggregator

Updates the current aggregator with a newly recorded long value.

Specified by:

recordLong in interface Aggregator

Parameters:

value - the new long value to be added.

recordDouble

public final void recordDouble(double value)

Description copied from interface: Aggregator

Updates the current aggregator with a newly recorded double value.

Specified by:

recordDouble in interface Aggregator

Parameters:

value - the new double value to be added.

doRecordDouble

protected void doRecordDouble(double value)

Concrete Aggregator instances should implement this method in order support recordings of double values.

hasRecordings

public boolean hasRecordings()

Description copied from interface: Aggregator

Whether there have been any recordings since this aggregator has been reset.

Specified by:

hasRecordings in interface Aggregator