org.apache.storm.kafka.spout.metrics

Class KafkaOffsetMetric<K,V>

java.lang.Object

org.apache.storm.kafka.spout.metrics.KafkaOffsetMetric<K,V>

All Implemented Interfaces:

IMetric

public class KafkaOffsetMetric<K,V>
extends Object
implements IMetric

This class is used compute the partition and topic level offset metrics.

Partition level metrics are: topicName/partition{number}/earliestTimeOffset //gives beginning offset of the partition topicName/partition{number}/latestTimeOffset //gives end offset of the partition topicName/partition{number}/latestEmittedOffset //gives latest emitted offset of the partition from the spout topicName/partition{number}/latestCompletedOffset //gives latest committed offset of the partition from the spout topicName/partition{number}/spoutLag // the delta between the latest Offset and latestCompletedOffset topicName/partition{number}/recordsInPartition // total number of records in the partition

Topic level metrics are: topicName/totalEarliestTimeOffset //gives the total beginning offset of all the associated partitions of this spout topicName/totalLatestTimeOffset //gives the total end offset of all the associated partitions of this spout topicName/totalLatestEmittedOffset //gives the total latest emitted offset of all the associated partitions of this spout topicName/totalLatestCompletedOffset //gives the total latest committed offset of all the associated partitions of this spout topicName/spoutLag // total spout lag of all the associated partitions of this spout topicName/totalRecordsInPartitions //total number of records in all the associated partitions of this spout

Constructor Summary

Constructors

Constructor and Description
KafkaOffsetMetric(Supplier<Map<org.apache.kafka.common.TopicPartition,OffsetManager>> offsetManagerSupplier, Supplier<org.apache.kafka.clients.consumer.Consumer<K,V>> consumerSupplier)

Method Summary

Modifier and Type	Method and Description
Object	getValueAndReset()

Methods inherited from class java.lang.Object

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

Constructor Detail

KafkaOffsetMetric

public KafkaOffsetMetric(Supplier<Map<org.apache.kafka.common.TopicPartition,OffsetManager>> offsetManagerSupplier,
                         Supplier<org.apache.kafka.clients.consumer.Consumer<K,V>> consumerSupplier)

Method Detail

getValueAndReset

public Object getValueAndReset()

Specified by:

getValueAndReset in interface IMetric

Returns:

an object that will be sent sent to IMetricsConsumer#handleDataPoints(org.apache.storm.metric.api.IMetricsConsumer .TaskInfo, java.util.Collection). If null is returned nothing will be sent. If this value can be reset, like with a counter, a side effect of calling this should be that the value is reset.