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

Class SliceSharedWindowAggProcessor

java.lang.Object

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

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

All Implemented Interfaces:

Serializable, SliceSharedAssigner.MergeCallback, SlicingWindowProcessor<Long>

public final class SliceSharedWindowAggProcessor
extends AbstractWindowAggProcessor
implements SliceSharedAssigner.MergeCallback

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 interface org.apache.flink.table.runtime.operators.window.slicing.SlicingWindowProcessor

SlicingWindowProcessor.Context<W>

Field Summary

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

accSerializer, aggregator, clockService, ctx, currentProgress, genAggsHandler, isEventTime, reuseOutput, shiftTimeZone, sliceAssigner, useDayLightSaving, windowBuffer, windowBufferFactory, windowInterval, windowState, windowTimerService

Constructor Summary

Constructors

Constructor and Description
SliceSharedWindowAggProcessor(GeneratedNamespaceAggsHandleFunction<Long> genAggsHandler, WindowBuffer.Factory bufferFactory, SliceSharedAssigner sliceAssigner, TypeSerializer<RowData> accSerializer, int indexOfCountStar, java.time.ZoneId shiftTimeZone)

Method Summary

Modifier and Type	Method and Description
void	fireWindow(Long windowEnd) Emit results of the given window.
void	merge(Long mergeResult, Iterable<Long> toBeMerged) Specifies that states of the given slices should be merged into the result 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.AbstractWindowAggProcessor

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

Methods inherited from class java.lang.Object

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

Constructor Detail

SliceSharedWindowAggProcessor

public SliceSharedWindowAggProcessor(GeneratedNamespaceAggsHandleFunction<Long> genAggsHandler,
                                     WindowBuffer.Factory bufferFactory,
                                     SliceSharedAssigner sliceAssigner,
                                     TypeSerializer<RowData> accSerializer,
                                     int indexOfCountStar,
                                     java.time.ZoneId shiftTimeZone)

Method Detail

fireWindow

public void fireWindow(Long windowEnd)
                throws Exception

Description copied from interface: SlicingWindowProcessor

Emit results of the given window.

Note: the key context has been set.

Specified by:

fireWindow in interface SlicingWindowProcessor<Long>

Parameters:

windowEnd - the window to emit

Throws:

Exception

merge

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

Description copied from interface: SliceSharedAssigner.MergeCallback

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

Specified by:

merge in interface SliceSharedAssigner.MergeCallback

Parameters:

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

toBeMerged - The list of slices that should be merged into one slice.

Throws:

Exception

sliceStateMergeTarget

protected long sliceStateMergeTarget(long sliceToMerge)
                              throws Exception

Description copied from class: AbstractWindowAggProcessor

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 AbstractWindowAggProcessor

Throws:

Exception

See Also:

SliceSharedAssigner.mergeSlices(long, SliceSharedAssigner.MergeCallback)