co.cask.cdap.metrics.process

Class PersistedMessageCallback

java.lang.Object

co.cask.cdap.metrics.process.PersistedMessageCallback

All Implemented Interfaces:

KafkaConsumer.MessageCallback

public final class PersistedMessageCallback
extends Object
implements KafkaConsumer.MessageCallback

A KafkaConsumer.MessageCallback that persists offset information into a VCTable while delegating the actual message consumption to another KafkaConsumer.MessageCallback.

Constructor Summary

Constructors

Constructor and Description
PersistedMessageCallback(KafkaConsumer.MessageCallback delegate, KafkaConsumerMetaTable metaTable, int persistThreshold) Constructs a PersistedMessageCallback which delegates to the given callback for actual action while persisting offsets information in to the given meta table when number of messages has been processed based on the persistThreshold.

Method Summary

Methods

Modifier and Type	Method and Description
void	finished()
void	onReceived(Iterator<FetchedMessage> messages)

Methods inherited from class java.lang.Object

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

Constructor Detail

PersistedMessageCallback

public PersistedMessageCallback(KafkaConsumer.MessageCallback delegate,
                        KafkaConsumerMetaTable metaTable,
                        int persistThreshold)

Constructs a PersistedMessageCallback which delegates to the given callback for actual action while persisting offsets information in to the given meta table when number of messages has been processed based on the persistThreshold.

Method Detail

onReceived

public void onReceived(Iterator<FetchedMessage> messages)

Specified by:

onReceived in interface KafkaConsumer.MessageCallback

finished

public void finished()

Specified by:

finished in interface KafkaConsumer.MessageCallback