Class GroupedAggregator
java.lang.Object
org.apache.storm.trident.operation.impl.GroupedAggregator
- All Implemented Interfaces:
- Serializable,- Aggregator<Object[]>,- Operation
- See Also:
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Constructor SummaryConstructors
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Method SummaryModifier and TypeMethodDescriptionvoidaggregate(Object[] arr, TridentTuple tuple, TridentCollector collector) voidcleanup()When running in local mode, called when the local cluster is being shut down.voidcomplete(Object[] arr, TridentCollector collector) Object[]init(Object batchId, TridentCollector collector) voidprepare(Map<String, Object> conf, TridentOperationContext context) Called when the `Operation` is first initialized.
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Constructor Details- 
GroupedAggregator
 
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Method Details- 
prepareDescription copied from interface:OperationCalled when the `Operation` is first initialized.- Specified by:
- preparein interface- Operation
- Parameters:
- conf- the Storm configuration map
- context- the operation context which provides information such as the number of partitions in the stream, and the current partition index. It also provides methods for registering operation-specific metrics.
- See Also:
 
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init- Specified by:
- initin interface- Aggregator<Object[]>
 
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aggregate- Specified by:
- aggregatein interface- Aggregator<Object[]>
 
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complete- Specified by:
- completein interface- Aggregator<Object[]>
 
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cleanuppublic void cleanup()Description copied from interface:OperationWhen running in local mode, called when the local cluster is being shut down.
 
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