public class SingleEmitAggregator extends Object implements Aggregator<org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState>
| Modifier and Type | Class and Description |
|---|---|
static interface |
SingleEmitAggregator.BatchToPartition |
| Constructor and Description |
|---|
SingleEmitAggregator(Aggregator agg,
SingleEmitAggregator.BatchToPartition batchToPartition) |
| Modifier and Type | Method and Description |
|---|---|
void |
aggregate(org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState val,
TridentTuple tuple,
TridentCollector collector) |
void |
cleanup()
When running in local mode, called when the local cluster is being shut down.
|
void |
complete(org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState val,
TridentCollector collector) |
org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState |
init(Object batchId,
TridentCollector collector) |
void |
prepare(Map<String,Object> conf,
TridentOperationContext context)
Called when the
Operation is first initialized. |
public SingleEmitAggregator(Aggregator agg, SingleEmitAggregator.BatchToPartition batchToPartition)
public org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState init(Object batchId, TridentCollector collector)
init in interface Aggregator<org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState>public void aggregate(org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState val,
TridentTuple tuple,
TridentCollector collector)
aggregate in interface Aggregator<org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState>public void complete(org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState val,
TridentCollector collector)
complete in interface Aggregator<org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState>public void prepare(Map<String,Object> conf, TridentOperationContext context)
OperationCalled when the Operation is first initialized.
prepare in interface Operationconf - 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.TridentOperationContextCopyright © 2021 The Apache Software Foundation. All rights reserved.