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

Class UnsliceWindowAggProcessor

java.lang.Object

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

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

All Implemented Interfaces:

Serializable, WindowProcessor<TimeWindow>, UnslicingWindowProcessor<TimeWindow>

public class UnsliceWindowAggProcessor
extends AbstractWindowAggProcessor<TimeWindow>
implements UnslicingWindowProcessor<TimeWindow>

An window aggregate processor implementation which works for UnsliceAssigner, e.g. session 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

Modifier and Type	Field	Description
protected MergingWindowProcessFunction<RowData,TimeWindow>	windowFunction

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
UnsliceWindowAggProcessor(GeneratedNamespaceAggsHandleFunction<TimeWindow> genAggsHandler, UnsliceAssigner<TimeWindow> unsliceAssigner, 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, TimeWindow window)	Clear state and resources associated with the given window namespace.
TypeSerializer<TimeWindow>	createWindowSerializer()	Returns the serializer of the window type.
void	fireWindow(long timerTimestamp, TimeWindow window)	Emit results of the given window.
protected WindowTimerService<TimeWindow>	getWindowTimerService()
void	open(WindowProcessor.Context<TimeWindow> 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.

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

close, 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

close, initializeWatermark

Field Detail

windowFunction

protected transient MergingWindowProcessFunction<RowData,TimeWindow> windowFunction

Constructor Detail

UnsliceWindowAggProcessor

public UnsliceWindowAggProcessor(GeneratedNamespaceAggsHandleFunction<TimeWindow> genAggsHandler,
                                 UnsliceAssigner<TimeWindow> unsliceAssigner,
                                 TypeSerializer<RowData> accSerializer,
                                 int indexOfCountStar,
                                 ZoneId shiftTimeZone)

Method Detail

open

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

Overrides:

open in class AbstractWindowAggProcessor<TimeWindow>

Throws:

Exception

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<TimeWindow>

Parameters:

key - the key associated with the element

element - The element to process.

Throws:

Exception

fireWindow

public void fireWindow(long timerTimestamp,
                       TimeWindow window)
                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<TimeWindow>

Parameters:

timerTimestamp - the fired timestamp

window - the window to emit

Throws:

Exception

clearWindow

public void clearWindow(long timerTimestamp,
                        TimeWindow window)
                 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<TimeWindow>

Parameters:

timerTimestamp - the fired timestamp

window - the window to clear

Throws:

Exception

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<TimeWindow>

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<TimeWindow>

Throws:

Exception

createWindowSerializer

public TypeSerializer<TimeWindow> createWindowSerializer()

Description copied from interface: WindowProcessor

Returns the serializer of the window type.

Specified by:

createWindowSerializer in interface WindowProcessor<TimeWindow>

getWindowTimerService

protected WindowTimerService<TimeWindow> getWindowTimerService()

Specified by:

getWindowTimerService in class AbstractWindowAggProcessor<TimeWindow>