@Internal public class PartitionAggregateOperator<IN,ACC,OUT> extends AbstractUdfStreamOperator<OUT,AggregateFunction<IN,ACC,OUT>> implements OneInputStreamOperator<IN,OUT>, BoundedOneInput
PartitionAggregateOperator
is used to apply the aggregate transformation on all
records of each partition. Each partition contains all records of a subtask.userFunction
chainingStrategy, config, lastRecordAttributes1, lastRecordAttributes2, latencyStats, LOG, metrics, output, processingTimeService, stateKeySelector1, stateKeySelector2, timeServiceManager
Constructor and Description |
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PartitionAggregateOperator(AggregateFunction<IN,ACC,OUT> aggregateFunction) |
Modifier and Type | Method and Description |
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void |
endInput()
It is notified that no more data will arrive from the input.
|
OperatorAttributes |
getOperatorAttributes()
Called to get the OperatorAttributes of the operator.
|
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 on this input of the
MultipleInputStreamOperator . |
close, finish, getUserFunction, getUserFunctionParameters, initializeState, notifyCheckpointAborted, notifyCheckpointComplete, setOutputType, setup, snapshotState
getChainingStrategy, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getTimeServiceManager, getUserCodeClassloader, hasKeyContext1, hasKeyContext2, initializeState, isUsingCustomRawKeyedState, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processRecordAttributes, processRecordAttributes1, processRecordAttributes2, processWatermark, processWatermark1, processWatermark2, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setProcessingTimeService, snapshotState
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
setKeyContextElement
close, finish, getMetricGroup, getOperatorID, initializeState, prepareSnapshotPreBarrier, setKeyContextElement1, setKeyContextElement2, snapshotState
notifyCheckpointAborted, notifyCheckpointComplete
getCurrentKey, setCurrentKey
processLatencyMarker, processRecordAttributes, processWatermark, processWatermarkStatus
hasKeyContext
public PartitionAggregateOperator(AggregateFunction<IN,ACC,OUT> aggregateFunction)
public void open() throws Exception
AbstractStreamOperator
The default implementation does nothing.
open
in interface StreamOperator<OUT>
open
in class AbstractUdfStreamOperator<OUT,AggregateFunction<IN,ACC,OUT>>
Exception
- An exception in this method causes the operator to fail.public void processElement(StreamRecord<IN> element) throws Exception
Input
MultipleInputStreamOperator
.
This method is guaranteed to not be called concurrently with other methods of the operator.processElement
in interface Input<IN>
Exception
public void endInput() throws Exception
BoundedOneInput
WARNING: It is not safe to use this method to commit any transactions or other side
effects! You can use this method to flush any buffered data that can later on be committed
e.g. in a CheckpointListener.notifyCheckpointComplete(long)
.
NOTE: Given it is semantically very similar to the StreamOperator.finish()
method. It might be dropped in favour of the other method at some point in time.
endInput
in interface BoundedOneInput
Exception
public OperatorAttributes getOperatorAttributes()
StreamOperator
getOperatorAttributes
in interface StreamOperator<OUT>
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