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 Summary
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Method Summary
Modifier and TypeMethodDescriptionvoid
aggregate
(Object[] arr, TridentTuple tuple, TridentCollector collector) void
cleanup()
When running in local mode, called when the local cluster is being shut down.void
complete
(Object[] arr, TridentCollector collector) Object[]
init
(Object batchId, TridentCollector collector) void
prepare
(Map<String, Object> conf, TridentOperationContext context) Called when the `Operation` is first initialized.
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Constructor Details
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GroupedAggregator
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Method Details
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prepare
Description copied from interface:Operation
Called when the `Operation` is first initialized.- Specified by:
prepare
in interfaceOperation
- Parameters:
conf
- the Storm configuration mapcontext
- 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:
init
in interfaceAggregator<Object[]>
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aggregate
- Specified by:
aggregate
in interfaceAggregator<Object[]>
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complete
- Specified by:
complete
in interfaceAggregator<Object[]>
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cleanup
public void cleanup()Description copied from interface:Operation
When running in local mode, called when the local cluster is being shut down.
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