Class SingleEmitAggregator
java.lang.Object
org.apache.storm.trident.operation.impl.SingleEmitAggregator
- All Implemented Interfaces:
Serializable,Aggregator<org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState>,Operation
public class SingleEmitAggregator
extends Object
implements Aggregator<org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState>
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Nested Class Summary
Nested Classes -
Constructor Summary
ConstructorsConstructorDescriptionSingleEmitAggregator(Aggregator agg, SingleEmitAggregator.BatchToPartition batchToPartition) -
Method Summary
Modifier and TypeMethodDescriptionvoidaggregate(org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState val, TridentTuple tuple, TridentCollector collector) voidcleanup()When running in local mode, called when the local cluster is being shut down.voidcomplete(org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState val, TridentCollector collector) org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitStateinit(Object batchId, TridentCollector collector) voidprepare(Map<String, Object> conf, TridentOperationContext context) Called when the `Operation` is first initialized.
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Constructor Details
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SingleEmitAggregator
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Method Details
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init
public org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState init(Object batchId, TridentCollector collector) - Specified by:
initin interfaceAggregator<org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState>
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aggregate
public void aggregate(org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState val, TridentTuple tuple, TridentCollector collector) - Specified by:
aggregatein interfaceAggregator<org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState>
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complete
public void complete(org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState val, TridentCollector collector) - Specified by:
completein interfaceAggregator<org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState>
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prepare
Description copied from interface:OperationCalled when the `Operation` is first initialized.- Specified by:
preparein 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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cleanup
public void cleanup()Description copied from interface:OperationWhen running in local mode, called when the local cluster is being shut down.
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