org.apache.storm.flux.examples

Class WordCounter

java.lang.Object

org.apache.storm.topology.base.BaseComponent

org.apache.storm.topology.base.BaseBasicBolt

org.apache.storm.flux.examples.WordCounter

All Implemented Interfaces:

Serializable, IBasicBolt, IComponent

public class WordCounter
extends BaseBasicBolt

This bolt is used by the HBase example. It simply emits the first field found in the incoming tuple as “word”, with a “count” of 1.

In this case, the downstream HBase bolt handles the counting, so a value of 1 will just increment the HBase counter by one.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
WordCounter()

Method Summary

Modifier and Type	Method and Description
void	cleanup()
void	declareOutputFields(OutputFieldsDeclarer declarer)
void	execute(Tuple input, BasicOutputCollector collector)
Map<String,Object>	getComponentConfiguration()
void	prepare(Map stormConf, TopologyContext context)

Methods inherited from class java.lang.Object

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

Constructor Detail

WordCounter

public WordCounter()

Method Detail

prepare

public void prepare(Map stormConf,
                    TopologyContext context)

Specified by:

prepare in interface IBasicBolt

Overrides:

prepare in class BaseBasicBolt

execute

public void execute(Tuple input,
                    BasicOutputCollector collector)

cleanup

public void cleanup()

Specified by:

cleanup in interface IBasicBolt

Overrides:

cleanup in class BaseBasicBolt

declareOutputFields

public void declareOutputFields(OutputFieldsDeclarer declarer)

getComponentConfiguration

public Map<String,Object> getComponentConfiguration()

Specified by:

getComponentConfiguration in interface IComponent

Overrides:

getComponentConfiguration in class BaseComponent