org.apache.storm.trident.operation.impl

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>

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	SingleEmitAggregator.BatchToPartition

Constructor Summary

Constructors

Constructor and Description
SingleEmitAggregator(Aggregator agg, SingleEmitAggregator.BatchToPartition batchToPartition)

Method Summary

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.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SingleEmitAggregator

public SingleEmitAggregator(Aggregator agg,
                            SingleEmitAggregator.BatchToPartition batchToPartition)

Method Detail

init

public org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState init(Object batchId,
                                                                                         TridentCollector collector)

Specified by:

init in interface Aggregator<org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState>

aggregate

public void aggregate(org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState val,
                      TridentTuple tuple,
                      TridentCollector collector)

Specified by:

aggregate in interface Aggregator<org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState>

complete

public void complete(org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState val,
                     TridentCollector collector)

Specified by:

complete in interface Aggregator<org.apache.storm.trident.operation.impl.SingleEmitAggregator.SingleEmitState>

prepare

public void prepare(Map<String,Object> conf,
                    TridentOperationContext context)

Description copied from interface: Operation

Called when the Operation is first initialized.

Specified by:

prepare in 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:

TridentOperationContext

cleanup

public void cleanup()

Description copied from interface: Operation

When running in local mode, called when the local cluster is being shut down.

Specified by:

cleanup in interface Operation