org.apache.flink.table.runtime.operators.aggregate.window.processors

Class SliceSharedWindowAggProcessor

java.lang.Object

org.apache.flink.table.runtime.operators.aggregate.window.processors.AbstractWindowAggProcessor<Long>

org.apache.flink.table.runtime.operators.aggregate.window.processors.AbstractSliceWindowAggProcessor

org.apache.flink.table.runtime.operators.aggregate.window.processors.SliceSharedWindowAggProcessor

All Implemented Interfaces:

Serializable, MergeCallback<Long,Iterable<Long>>, WindowProcessor<Long>, SlicingWindowProcessor<Long>

public final class SliceSharedWindowAggProcessor
extends AbstractSliceWindowAggProcessor
implements MergeCallback<Long,Iterable<Long>>

An window aggregate processor implementation which works for SliceSharedAssigner, e.g. hopping windows and cumulative windows.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.table.runtime.operators.aggregate.window.processors.AbstractWindowAggProcessor

AbstractWindowAggProcessor.WindowIsEmptySupplier

Nested classes/interfaces inherited from interface org.apache.flink.table.runtime.operators.window.tvf.common.WindowProcessor

WindowProcessor.Context<W>

Field Summary

Fields inherited from class org.apache.flink.table.runtime.operators.aggregate.window.processors.AbstractSliceWindowAggProcessor

sliceAssigner, windowBuffer, windowBufferFactory, windowInterval

Fields inherited from class org.apache.flink.table.runtime.operators.aggregate.window.processors.AbstractWindowAggProcessor

accSerializer, aggregator, clockService, ctx, currentProgress, emptySupplier, genAggsHandler, isEventTime, reuseOutput, shiftTimeZone, useDayLightSaving, windowState, windowTimerService

Constructor Summary

Constructors

Constructor and Description
SliceSharedWindowAggProcessor(GeneratedNamespaceAggsHandleFunction<Long> genAggsHandler, WindowBuffer.Factory bufferFactory, SliceSharedAssigner sliceAssigner, org.apache.flink.api.common.typeutils.TypeSerializer<org.apache.flink.table.data.RowData> accSerializer, int indexOfCountStar, ZoneId shiftTimeZone)

Method Summary

Modifier and Type	Method and Description
void	fireWindow(long timerTimestamp, Long windowEnd) Emit results of the given window.
void	merge(Long mergeResult, Iterable<Long> toBeMerged) Specifies that states of the given windows or slices should be merged into the result window or slice.
protected long	sliceStateMergeTarget(long sliceToMerge) Returns the slice state target to merge the given slice into when firing windows.

Methods inherited from class org.apache.flink.table.runtime.operators.aggregate.window.processors.AbstractSliceWindowAggProcessor

advanceProgress, clearWindow, close, createWindowSerializer, getWindowTimerService, open, prepareCheckpoint, processElement

Methods inherited from class org.apache.flink.table.runtime.operators.aggregate.window.processors.AbstractWindowAggProcessor

collect, initializeWatermark

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.table.runtime.operators.window.tvf.common.WindowProcessor

initializeWatermark

Constructor Detail

SliceSharedWindowAggProcessor

public SliceSharedWindowAggProcessor(GeneratedNamespaceAggsHandleFunction<Long> genAggsHandler,
                                     WindowBuffer.Factory bufferFactory,
                                     SliceSharedAssigner sliceAssigner,
                                     org.apache.flink.api.common.typeutils.TypeSerializer<org.apache.flink.table.data.RowData> accSerializer,
                                     int indexOfCountStar,
                                     ZoneId shiftTimeZone)

Method Detail

fireWindow

public void fireWindow(long timerTimestamp,
                       Long windowEnd)
                throws Exception

Description copied from interface: WindowProcessor

Emit results of the given window.

Note: the key context has been set.

Specified by:

fireWindow in interface WindowProcessor<Long>

Parameters:

timerTimestamp - the fired timestamp

windowEnd - the window to emit

Throws:

Exception

merge

public void merge(@Nullable
                  Long mergeResult,
                  Iterable<Long> toBeMerged)
           throws Exception

Description copied from interface: MergeCallback

Specifies that states of the given windows or slices should be merged into the result window or slice.

Specified by:

merge in interface MergeCallback<Long,Iterable<Long>>

Parameters:

mergeResult - The resulting merged window or slice, null if it represents a non-state namespace.

toBeMerged - Windows or slices that should be merged into one window or slice.

Throws:

Exception

sliceStateMergeTarget

protected long sliceStateMergeTarget(long sliceToMerge)
                              throws Exception

Description copied from class: AbstractSliceWindowAggProcessor

Returns the slice state target to merge the given slice into when firing windows. For unshared windows, there should no merging happens, so the merge target should be just the given sliceToMerge. For shared windows, the merge target should be the shared slice state.

Specified by:

sliceStateMergeTarget in class AbstractSliceWindowAggProcessor

Throws:

Exception

See Also:

SliceSharedAssigner.mergeSlices(long, MergeCallback)