org.apache.flink.streaming.connectors.kafka.internals.metrics

Class DefaultKafkaMetricAccumulator

java.lang.Object

org.apache.flink.streaming.connectors.kafka.internals.metrics.DefaultKafkaMetricAccumulator

All Implemented Interfaces:

Serializable, Cloneable, org.apache.flink.api.common.accumulators.Accumulator<Void,Double>

Direct Known Subclasses:

AvgKafkaMetricAccumulator, MaxKafkaMetricAccumulator, MinKafkaMetricAccumulator

public class DefaultKafkaMetricAccumulator
extends Object
implements org.apache.flink.api.common.accumulators.Accumulator<Void,Double>, Serializable

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	isMerged
protected org.apache.kafka.common.metrics.KafkaMetric	kafkaMetric
protected double	mergedValue

Method Summary

Methods

Modifier and Type	Method and Description
void	add(Void value)
org.apache.flink.api.common.accumulators.Accumulator<Void,Double>	clone()
static DefaultKafkaMetricAccumulator	createFor(org.apache.kafka.common.Metric metric)
Double	getLocalValue()
protected static org.apache.kafka.common.metrics.Measurable	getMeasurableFromKafkaMetric(org.apache.kafka.common.metrics.KafkaMetric kafkaMetric) This utility method is using reflection to get the Measurable from the KafkaMetric.
void	merge(org.apache.flink.api.common.accumulators.Accumulator<Void,Double> other)
void	resetLocal()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

isMerged

protected boolean isMerged

mergedValue

protected double mergedValue

kafkaMetric

protected transient org.apache.kafka.common.metrics.KafkaMetric kafkaMetric

Method Detail

createFor

public static DefaultKafkaMetricAccumulator createFor(org.apache.kafka.common.Metric metric)

getMeasurableFromKafkaMetric

protected static org.apache.kafka.common.metrics.Measurable getMeasurableFromKafkaMetric(org.apache.kafka.common.metrics.KafkaMetric kafkaMetric)

This utility method is using reflection to get the Measurable from the KafkaMetric. Since Kafka 0.9, Kafka is exposing the Measurable properly, but Kafka 0.8.2 does not yet expose it.

Parameters:

kafkaMetric - the metric to extract the field form

Returns:

Measurable type (or null in case of an error)

add

public void add(Void value)

Specified by:

add in interface org.apache.flink.api.common.accumulators.Accumulator<Void,Double>

getLocalValue

public Double getLocalValue()

Specified by:

getLocalValue in interface org.apache.flink.api.common.accumulators.Accumulator<Void,Double>

resetLocal

public void resetLocal()

Specified by:

resetLocal in interface org.apache.flink.api.common.accumulators.Accumulator<Void,Double>

merge

public void merge(org.apache.flink.api.common.accumulators.Accumulator<Void,Double> other)

Specified by:

merge in interface org.apache.flink.api.common.accumulators.Accumulator<Void,Double>

clone

public org.apache.flink.api.common.accumulators.Accumulator<Void,Double> clone()

Specified by:

clone in interface org.apache.flink.api.common.accumulators.Accumulator<Void,Double>

Overrides:

clone in class Object

toString

public String toString()

Overrides:

toString in class Object