Package org.apache.flink.table.runtime.operators.window.grouping

Class HeapWindowsGrouping

java.lang.Object

org.apache.flink.table.runtime.operators.window.grouping.WindowsGrouping

org.apache.flink.table.runtime.operators.window.grouping.HeapWindowsGrouping

All Implemented Interfaces:

Closeable, AutoCloseable

public class HeapWindowsGrouping
extends WindowsGrouping

A jvm heap implementation of WindowsGrouping, which uses a linked list to buffer all the inputs of a keyed group belonging to the same window. It is designed to have a capacity limit to avoid JVM OOM and reduce GC pauses.

Constructor Summary

Constructors

Constructor	Description
HeapWindowsGrouping(int maxSizeLimit, long windowSize, long slideSize, int timeIndex, boolean isDate)
HeapWindowsGrouping(int maxSizeLimit, long offset, long windowSize, long slideSize, int timeIndex, boolean isDate)

Method Summary

Modifier and Type	Method	Description
protected void	addIntoBuffer(BinaryRowData input)
void	close()
protected RowIterator<BinaryRowData>	newBufferIterator(int startIndex)
protected void	onBufferEvict(int limitIndex)
protected void	resetBuffer()

Methods inherited from class org.apache.flink.table.runtime.operators.window.grouping.WindowsGrouping

addInputToBuffer, advanceWatermarkToTriggerAllWindows, buildTriggerWindowElementsIterator, getTriggerWindow, hasTriggerWindow, reset

Methods inherited from class java.lang.Object

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

Constructor Detail

HeapWindowsGrouping

public HeapWindowsGrouping(int maxSizeLimit,
                           long windowSize,
                           long slideSize,
                           int timeIndex,
                           boolean isDate)

HeapWindowsGrouping

public HeapWindowsGrouping(int maxSizeLimit,
                           long offset,
                           long windowSize,
                           long slideSize,
                           int timeIndex,
                           boolean isDate)

Method Detail

resetBuffer

protected void resetBuffer()

Specified by:

resetBuffer in class WindowsGrouping

onBufferEvict

protected void onBufferEvict(int limitIndex)

Specified by:

onBufferEvict in class WindowsGrouping

addIntoBuffer

protected void addIntoBuffer(BinaryRowData input)
                      throws IOException

Specified by:

addIntoBuffer in class WindowsGrouping

Throws:

IOException

newBufferIterator

protected RowIterator<BinaryRowData> newBufferIterator(int startIndex)

Specified by:

newBufferIterator in class WindowsGrouping

close

public void close()
           throws IOException

Throws:

IOException