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

Class AbstractSliceWindowAggProcessor

java.lang.Object

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

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

All Implemented Interfaces:

Serializable, WindowProcessor<Long>, SlicingWindowProcessor<Long>

Direct Known Subclasses:

SliceSharedWindowAggProcessor, SliceUnsharedWindowAggProcessor

public abstract class AbstractSliceWindowAggProcessor
extends AbstractWindowAggProcessor<Long>
implements SlicingWindowProcessor<Long>

A base implementation of SlicingWindowProcessor for window aggregate.

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

Modifier and Type	Field	Description
protected SliceAssigner	sliceAssigner
protected WindowBuffer	windowBuffer
protected WindowBuffer.Factory	windowBufferFactory
protected long	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	Description
AbstractSliceWindowAggProcessor(GeneratedNamespaceAggsHandleFunction<Long> genAggsHandler, WindowBuffer.Factory bufferFactory, SliceAssigner sliceAssigner, TypeSerializer<RowData> accSerializer, int indexOfCountStar, ZoneId shiftTimeZone)

Method Summary

Modifier and Type	Method	Description
void	advanceProgress(long progress)	Advances the progress time, the progress time is watermark if working in event-time mode, or current processing time if working in processing-time mode.
void	clearWindow(long timerTimestamp, Long windowEnd)	Clear state and resources associated with the given window namespace.
void	close()	The tear-down method of the function.
TypeSerializer<Long>	createWindowSerializer()	Returns the serializer of the window type.
protected WindowTimerService<Long>	getWindowTimerService()
void	open(WindowProcessor.Context<Long> context)	Initialization method for the function.
void	prepareCheckpoint()	Performs a preparation before checkpoint.
boolean	processElement(RowData key, RowData element)	Process an element with associated key from the input stream.
protected abstract 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

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

fireWindow, initializeWatermark

Field Detail

windowBufferFactory

protected final WindowBuffer.Factory windowBufferFactory

sliceAssigner

protected final SliceAssigner sliceAssigner

windowInterval

protected final long windowInterval

windowBuffer

protected transient WindowBuffer windowBuffer

Constructor Detail

AbstractSliceWindowAggProcessor

public AbstractSliceWindowAggProcessor(GeneratedNamespaceAggsHandleFunction<Long> genAggsHandler,
                                       WindowBuffer.Factory bufferFactory,
                                       SliceAssigner sliceAssigner,
                                       TypeSerializer<RowData> accSerializer,
                                       int indexOfCountStar,
                                       ZoneId shiftTimeZone)

Method Detail

open

public void open(WindowProcessor.Context<Long> context)
          throws Exception

Description copied from interface: WindowProcessor

Initialization method for the function. It is called before the actual working methods.

Specified by:

open in interface WindowProcessor<Long>

Overrides:

open in class AbstractWindowAggProcessor<Long>

Throws:

Exception

getWindowTimerService

protected WindowTimerService<Long> getWindowTimerService()

Specified by:

getWindowTimerService in class AbstractWindowAggProcessor<Long>

processElement

public boolean processElement(RowData key,
                              RowData element)
                       throws Exception

Description copied from interface: WindowProcessor

Process an element with associated key from the input stream. Returns true if this element is dropped because of late arrival.

Specified by:

processElement in interface WindowProcessor<Long>

Parameters:

key - the key associated with the element

element - The element to process.

Throws:

Exception

sliceStateMergeTarget

protected abstract long sliceStateMergeTarget(long sliceToMerge)
                                       throws Exception

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.

Throws:

Exception

See Also:

SliceSharedAssigner.mergeSlices(long, MergeCallback)

advanceProgress

public void advanceProgress(long progress)
                     throws Exception

Description copied from interface: WindowProcessor

Advances the progress time, the progress time is watermark if working in event-time mode, or current processing time if working in processing-time mode.

This will potentially flush buffered data into states, because the watermark advancement may be in a very small step, but we don't need to flush buffered data for every watermark advancement.

Specified by:

advanceProgress in interface WindowProcessor<Long>

Parameters:

progress - the current progress time

Throws:

Exception

prepareCheckpoint

public void prepareCheckpoint()
                       throws Exception

Description copied from interface: WindowProcessor

Performs a preparation before checkpoint. This usually flushes buffered data into state.

Specified by:

prepareCheckpoint in interface WindowProcessor<Long>

Throws:

Exception

clearWindow

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

Description copied from interface: WindowProcessor

Clear state and resources associated with the given window namespace.

Note: the key context has been set.

Specified by:

clearWindow in interface WindowProcessor<Long>

Parameters:

timerTimestamp - the fired timestamp

windowEnd - the window to clear

Throws:

Exception

close

public void close()
           throws Exception

Description copied from interface: WindowProcessor

The tear-down method of the function. It is called after the last call to the main working methods.

Specified by:

close in interface WindowProcessor<Long>

Overrides:

close in class AbstractWindowAggProcessor<Long>

Throws:

Exception

createWindowSerializer

public TypeSerializer<Long> createWindowSerializer()

Description copied from interface: WindowProcessor

Returns the serializer of the window type.

Specified by:

createWindowSerializer in interface WindowProcessor<Long>