org.apache.storm.kafka.bolt

Class KafkaBolt<K,V>

java.lang.Object

org.apache.storm.topology.base.BaseComponent

org.apache.storm.topology.base.BaseRichBolt

org.apache.storm.topology.base.BaseTickTupleAwareRichBolt

org.apache.storm.kafka.bolt.KafkaBolt<K,V>

All Implemented Interfaces:

Serializable, IBolt, IComponent, IRichBolt

public class KafkaBolt<K,V>
extends BaseTickTupleAwareRichBolt

Bolt implementation that can send Tuple data to Kafka

It expects the producer configuration and topic in storm config under

‘kafka.broker.properties’ and ‘topic’

respectively.

This bolt uses 0.8.2 Kafka Producer API.

It works for sending tuples to older Kafka version (0.8.1).

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	TOPIC

Constructor Summary

Constructors

Constructor and Description
KafkaBolt()

Method Summary

Modifier and Type	Method and Description
void	cleanup()
void	declareOutputFields(OutputFieldsDeclarer declarer)
void	prepare(Map stormConf, TopologyContext context, OutputCollector collector)
protected void	process(Tuple input)
void	setAsync(boolean async)
void	setFireAndForget(boolean fireAndForget)
KafkaBolt<K,V>	withProducerProperties(Properties producerProperties)
KafkaBolt<K,V>	withTopicSelector(KafkaTopicSelector selector)
KafkaBolt<K,V>	withTupleToKafkaMapper(TupleToKafkaMapper<K,V> mapper)

Methods inherited from class org.apache.storm.topology.base.BaseTickTupleAwareRichBolt

execute, onTickTuple

Methods inherited from class org.apache.storm.topology.base.BaseComponent

getComponentConfiguration

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.storm.topology.IComponent

getComponentConfiguration

Field Detail

TOPIC

public static final String TOPIC

See Also:

Constant Field Values

Constructor Detail

KafkaBolt

public KafkaBolt()

Method Detail

withTupleToKafkaMapper

public KafkaBolt<K,V> withTupleToKafkaMapper(TupleToKafkaMapper<K,V> mapper)

withTopicSelector

public KafkaBolt<K,V> withTopicSelector(KafkaTopicSelector selector)

withProducerProperties

public KafkaBolt<K,V> withProducerProperties(Properties producerProperties)

prepare

public void prepare(Map stormConf,
                    TopologyContext context,
                    OutputCollector collector)

process

protected void process(Tuple input)

Specified by:

process in class BaseTickTupleAwareRichBolt

declareOutputFields

public void declareOutputFields(OutputFieldsDeclarer declarer)

cleanup

public void cleanup()

Specified by:

cleanup in interface IBolt

Overrides:

cleanup in class BaseRichBolt

setFireAndForget

public void setFireAndForget(boolean fireAndForget)

setAsync

public void setAsync(boolean async)