alluxio.metrics.aggregator

Class SingleTagValueAggregator

java.lang.Object

alluxio.metrics.aggregator.SingleTagValueAggregator

All Implemented Interfaces:

MultiValueMetricsAggregator

public class SingleTagValueAggregator
extends Object
implements MultiValueMetricsAggregator

An aggregator that aggregates the metrics into multiple values based on a single tag of the metric.

Constructor Summary

Constructors

Constructor and Description
SingleTagValueAggregator(String aggregationName, String metricName, String tagName) Constructs a new instance of SingleTagValueAggregator.

Method Summary

Modifier and Type	Method and Description
String	getFilterMetricName()
long	getValue(String name) Gets the metric value of the given fully qualified metric name.
Map<String,Long>	updateValues(Set<Metric> set) Updates the aggregated values from the filtered metrics.

Methods inherited from class java.lang.Object

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

Constructor Detail

SingleTagValueAggregator

public SingleTagValueAggregator(String aggregationName,
                                String metricName,
                                String tagName)

Constructs a new instance of SingleTagValueAggregator.

Parameters:

aggregationName - the aggregated metric name

metricName - metric name

tagName - tag name

Method Detail

getFilterMetricName

public String getFilterMetricName()

Specified by:

getFilterMetricName in interface MultiValueMetricsAggregator

Returns:

the metric name to use for filter metrics

updateValues

public Map<String,Long> updateValues(Set<Metric> set)

Description copied from interface: MultiValueMetricsAggregator

Updates the aggregated values from the filtered metrics. The values of map will be the filtered metrics using the metric name defined in MultiValueMetricsAggregator.getFilterMetricName(). The returned values are organized as a map from the metric name to metric value.

Specified by:

updateValues in interface MultiValueMetricsAggregator

Parameters:

set - a map of metric name to the set of metrics that have the metric name

Returns:

the aggregated values

getValue

public long getValue(String name)

Description copied from interface: MultiValueMetricsAggregator

Gets the metric value of the given fully qualified metric name.

Specified by:

getValue in interface MultiValueMetricsAggregator

Parameters:

name - the fully qualified metric name

Returns:

the metric value, 0 if the metric name does not exist