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

Class WindowAggProcessorBase<W,C extends WindowProcessor.Context<W>>

java.lang.Object

org.apache.flink.table.runtime.operators.aggregate.window.processors.WindowAggProcessorBase<W,C>

All Implemented Interfaces:

Serializable, WindowProcessor<W,C>

Direct Known Subclasses:

AbstractAsyncStateWindowAggProcessor, AbstractSyncStateWindowAggProcessor

public abstract class WindowAggProcessorBase<W,C extends WindowProcessor.Context<W>>
extends Object
implements WindowProcessor<W,C>

See Also:

• Serialized Form

Nested Class Summary

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 final org.apache.flink.api.common.typeutils.TypeSerializer<org.apache.flink.table.data.RowData>	accSerializer
protected NamespaceAggsHandleFunction<W>	aggregator
protected ClockService	clockService
protected C	ctx
protected long	currentProgress
protected final GeneratedNamespaceAggsHandleFunction<W>	genAggsHandler
protected final boolean	isEventTime
protected org.apache.flink.table.data.utils.JoinedRowData	reuseOutput
protected final ZoneId	shiftTimeZone
protected final boolean	useDayLightSaving	The shift timezone is using DayLightSaving time or not.
protected WindowTimerService<W>	windowTimerService

Constructor Summary

Constructors

Constructor	Description
WindowAggProcessorBase(GeneratedNamespaceAggsHandleFunction<W> genAggsHandler, org.apache.flink.api.common.typeutils.TypeSerializer<org.apache.flink.table.data.RowData> accSerializer, boolean isEventTime, ZoneId shiftTimeZone)

Method Summary

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

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

createWindowSerializer

Field Details

genAggsHandler

protected final GeneratedNamespaceAggsHandleFunction<W> genAggsHandler

accSerializer

protected final org.apache.flink.api.common.typeutils.TypeSerializer<org.apache.flink.table.data.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.

currentProgress

protected transient long currentProgress

ctx

protected transient C extends WindowProcessor.Context<W> ctx

clockService

protected transient ClockService clockService

windowTimerService

protected transient WindowTimerService<W> windowTimerService

aggregator

protected transient NamespaceAggsHandleFunction<W> aggregator

reuseOutput

protected transient org.apache.flink.table.data.utils.JoinedRowData reuseOutput

Constructor Details

WindowAggProcessorBase

public WindowAggProcessorBase(GeneratedNamespaceAggsHandleFunction<W> genAggsHandler,
 org.apache.flink.api.common.typeutils.TypeSerializer<org.apache.flink.table.data.RowData> accSerializer,
 boolean isEventTime,
 ZoneId shiftTimeZone)

Method Details

open

public void open(C 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,C extends WindowProcessor.Context<W>>

Throws:

Exception

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,C extends WindowProcessor.Context<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,C extends WindowProcessor.Context<W>>

Throws:

Exception

prepareAggregator

protected abstract void prepareAggregator()
                                   throws Exception

Throws:

Exception

getWindowTimerService

protected abstract WindowTimerService<W> getWindowTimerService()

collect

protected void collect(org.apache.flink.table.data.RowData currentKey,
 org.apache.flink.table.data.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.