org.apache.flink.storm.wordcount.operators

Class BoltCounterByName

java.lang.Object

org.apache.flink.storm.wordcount.operators.BoltCounterByName

All Implemented Interfaces:

Serializable, org.apache.storm.task.IBolt, org.apache.storm.topology.IComponent, org.apache.storm.topology.IRichBolt

public class BoltCounterByName
extends Object
implements org.apache.storm.topology.IRichBolt

Implements the word counter that counts the occurrence of each unique word. The bolt takes a pair (input tuple schema: <String,Integer>) and sums the given word count for each unique word (output tuple schema: <String,Integer> ).

Same as BoltCounter, but accesses input attribute by name (instead of index).

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	ATTRIBUTE_COUNT
static String	ATTRIBUTE_WORD

Constructor Summary

Constructors

Constructor and Description
BoltCounterByName()

Method Summary

Modifier and Type	Method and Description
void	cleanup()
void	declareOutputFields(org.apache.storm.topology.OutputFieldsDeclarer declarer)
void	execute(org.apache.storm.tuple.Tuple input)
Map<String,Object>	getComponentConfiguration()
void	prepare(Map stormConf, org.apache.storm.task.TopologyContext context, org.apache.storm.task.OutputCollector collector)

Methods inherited from class java.lang.Object

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

Field Detail

ATTRIBUTE_WORD

public static final String ATTRIBUTE_WORD

See Also:

Constant Field Values

ATTRIBUTE_COUNT

public static final String ATTRIBUTE_COUNT

See Also:

Constant Field Values

Constructor Detail

BoltCounterByName

public BoltCounterByName()

Method Detail

prepare

public void prepare(Map stormConf,
                    org.apache.storm.task.TopologyContext context,
                    org.apache.storm.task.OutputCollector collector)

Specified by:

prepare in interface org.apache.storm.task.IBolt

execute

public void execute(org.apache.storm.tuple.Tuple input)

Specified by:

execute in interface org.apache.storm.task.IBolt

cleanup

public void cleanup()

Specified by:

cleanup in interface org.apache.storm.task.IBolt

declareOutputFields

public void declareOutputFields(org.apache.storm.topology.OutputFieldsDeclarer declarer)

Specified by:

declareOutputFields in interface org.apache.storm.topology.IComponent

getComponentConfiguration

public Map<String,Object> getComponentConfiguration()

Specified by:

getComponentConfiguration in interface org.apache.storm.topology.IComponent