@Internal public class StreamGroupedReduce<IN> extends AbstractUdfStreamOperator<IN,ReduceFunction<IN>> implements OneInputStreamOperator<IN,IN>
AbstractStreamOperator.CountingOutput, AbstractStreamOperator.LatencyGauge
userFunction
chainingStrategy, config, latencyGauge, LOG, metrics, output, timeServiceManager
Constructor and Description |
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StreamGroupedReduce(ReduceFunction<IN> reducer,
TypeSerializer<IN> serializer) |
Modifier and Type | Method and Description |
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void |
open()
This method is called immediately before any elements are processed, it should contain the
operator's initialization logic, e.g.
|
void |
processElement(StreamRecord<IN> element)
Processes one element that arrived at this operator.
|
close, dispose, getUserFunction, getUserFunctionParameters, initializeState, notifyOfCompletedCheckpoint, setOutputType, setup, snapshotState
getChainingStrategy, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getUserCodeClassloader, initializeState, numEventTimeTimers, numProcessingTimeTimers, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processWatermark, processWatermark1, processWatermark2, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, snapshotState
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
processLatencyMarker, processWatermark
close, dispose, getChainingStrategy, getMetricGroup, getOperatorID, initializeState, notifyOfCompletedCheckpoint, setChainingStrategy, setKeyContextElement1, setKeyContextElement2, setup, snapshotState
public StreamGroupedReduce(ReduceFunction<IN> reducer, TypeSerializer<IN> serializer)
public void open() throws Exception
AbstractStreamOperator
The default implementation does nothing.
open
in interface StreamOperator<IN>
open
in class AbstractUdfStreamOperator<IN,ReduceFunction<IN>>
Exception
- An exception in this method causes the operator to fail.public void processElement(StreamRecord<IN> element) throws Exception
OneInputStreamOperator
processElement
in interface OneInputStreamOperator<IN,IN>
Exception
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