public class CombinerAggregatorInitImpl extends Object implements Function
Constructor and Description |
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CombinerAggregatorInitImpl(CombinerAggregator agg) |
Modifier and Type | Method and Description |
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void |
cleanup()
When running in local mode, called when the local cluster is being shut down.
|
void |
execute(TridentTuple tuple,
TridentCollector collector)
Performs the function logic on an individual tuple and emits 0 or more tuples.
|
void |
prepare(Map<String,Object> conf,
TridentOperationContext context)
Called when the
Operation is first initialized. |
public CombinerAggregatorInitImpl(CombinerAggregator agg)
public void execute(TridentTuple tuple, TridentCollector collector)
Function
Performs the function logic on an individual tuple and emits 0 or more tuples.
public void prepare(Map<String,Object> conf, TridentOperationContext context)
Operation
Called when the Operation
is first initialized.
prepare
in interface Operation
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.TridentOperationContext
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