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

Class AbstractWindowAggProcessor<W>

java.lang.Object

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

All Implemented Interfaces:

Serializable, WindowProcessor<W>

Direct Known Subclasses:

AbstractSliceWindowAggProcessor, UnsliceWindowAggProcessor

public abstract class AbstractWindowAggProcessor<W>
extends Object
implements WindowProcessor<W>

A base class for window aggregate processors.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	AbstractWindowAggProcessor.WindowIsEmptySupplier	A supplier that returns whether the window is empty.

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 TypeSerializer<RowData>	accSerializer
protected NamespaceAggsHandleFunction<W>	aggregator
protected ClockService	clockService
protected WindowProcessor.Context<W>	ctx
protected long	currentProgress
protected AbstractWindowAggProcessor.WindowIsEmptySupplier	emptySupplier
protected GeneratedNamespaceAggsHandleFunction<W>	genAggsHandler
protected boolean	isEventTime
protected JoinedRowData	reuseOutput
protected ZoneId	shiftTimeZone
protected boolean	useDayLightSaving	The shift timezone is using DayLightSaving time or not.
protected WindowValueState<W>	windowState	state schema: [key, window, accumulator].
protected WindowTimerService<W>	windowTimerService

Constructor Summary

Constructors

Constructor	Description
AbstractWindowAggProcessor(GeneratedNamespaceAggsHandleFunction<W> genAggsHandler, WindowAssigner sliceAssigner, TypeSerializer<RowData> accSerializer, boolean isEventTime, int indexOfCountStar, ZoneId shiftTimeZone)

Method Summary

Modifier and Type	Method	Description
void	close()	The tear-down method of the function.
protected void	collect(RowData aggResult)	Send result to downstream.
protected abstract WindowTimerService<W>	getWindowTimerService()
void	initializeWatermark(long watermark)	Initializes the watermark which restores from state.
void	open(WindowProcessor.Context<W> context)	Initialization method for the function.

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

advanceProgress, clearWindow, createWindowSerializer, fireWindow, prepareCheckpoint, processElement

Field Detail

genAggsHandler

protected final GeneratedNamespaceAggsHandleFunction<W> genAggsHandler

accSerializer

protected final TypeSerializer<RowData> accSerializer

isEventTime

protected final boolean isEventTime

shiftTimeZone

protected final ZoneId shiftTimeZone

useDayLightSaving

protected final boolean useDayLightSaving

The shift timezone is using DayLightSaving time or not.

emptySupplier

protected final AbstractWindowAggProcessor.WindowIsEmptySupplier emptySupplier

currentProgress

protected transient long currentProgress

ctx

protected transient WindowProcessor.Context<W> ctx

clockService

protected transient ClockService clockService

windowTimerService

protected transient WindowTimerService<W> windowTimerService

aggregator

protected transient NamespaceAggsHandleFunction<W> aggregator

windowState

protected transient WindowValueState<W> windowState

state schema: [key, window, accumulator].

reuseOutput

protected transient JoinedRowData reuseOutput

Constructor Detail

AbstractWindowAggProcessor

public AbstractWindowAggProcessor(GeneratedNamespaceAggsHandleFunction<W> genAggsHandler,
                                  WindowAssigner sliceAssigner,
                                  TypeSerializer<RowData> accSerializer,
                                  boolean isEventTime,
                                  int indexOfCountStar,
                                  ZoneId shiftTimeZone)

Method Detail

open

public void open(WindowProcessor.Context<W> 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<W>

Throws:

Exception

getWindowTimerService

protected abstract WindowTimerService<W> getWindowTimerService()

initializeWatermark

public void initializeWatermark(long watermark)

Description copied from interface: WindowProcessor

Initializes the watermark which restores from state. The method is called after open method and before the actual working methods.

Specified by:

initializeWatermark in interface WindowProcessor<W>

Parameters:

watermark - the initial watermark

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<W>

Throws:

Exception

collect

protected void collect(RowData aggResult)

Send result to downstream.

The RowKind of the results is always RowKind.INSERT.

TODO support early fire / late file to produce changelog result.