Package 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
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:
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Constructor SummaryConstructors
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Method SummaryModifier and TypeMethodDescriptionvoidcleanup()voiddeclareOutputFields(OutputFieldsDeclarer declarer) Declare the output schema for all the streams of this topology.voidexecute(Tuple input, BasicOutputCollector collector) Process the input tuple and optionally emit new tuples based on the input tuple.Declare configuration specific to this component.voidprepare(Map<String, Object> topoConf, TopologyContext context) 
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Constructor Details- 
WordCounterpublic WordCounter()
 
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Method Details- 
prepare- Specified by:
- preparein interface- IBasicBolt
- Overrides:
- preparein class- BaseBasicBolt
 
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executeDescription copied from interface:IBasicBoltProcess the input tuple and optionally emit new tuples based on the input tuple.All acking is managed for you. Throw a FailedException if you want to fail the tuple. 
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cleanuppublic void cleanup()- Specified by:
- cleanupin interface- IBasicBolt
- Overrides:
- cleanupin class- BaseBasicBolt
 
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declareOutputFieldsDescription copied from interface:IComponentDeclare the output schema for all the streams of this topology.- Parameters:
- declarer- this is used to declare output stream ids, output fields, and whether or not each output stream is a direct stream
 
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getComponentConfigurationDescription copied from interface:IComponentDeclare configuration specific to this component. Only a subset of the "topology.*" configs can be overridden. The component configuration can be further overridden when constructing the topology usingTopologyBuilder- Specified by:
- getComponentConfigurationin interface- IComponent
- Overrides:
- getComponentConfigurationin class- BaseComponent
 
 
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