org.apache.flink.table.runtime.operators.aggregate.window.buffers

类 RecordsWindowBuffer

java.lang.Object

org.apache.flink.table.runtime.operators.aggregate.window.buffers.RecordsWindowBuffer

所有已实现的接口:

WindowBuffer

public final class RecordsWindowBuffer
extends Object
implements WindowBuffer

An implementation of WindowBuffer that buffers input elements in a WindowBytesMultiMap and combines buffered elements into state when flushing.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	RecordsWindowBuffer.Factory Factory to create RecordsWindowBuffer with RecordsCombiner.Factory.
static class	RecordsWindowBuffer.LocalFactory Factory to create RecordsWindowBuffer with RecordsCombiner.LocalFactory.

构造器概要

构造器

构造器和说明
RecordsWindowBuffer(Object operatorOwner, org.apache.flink.runtime.memory.MemoryManager memoryManager, long memorySize, RecordsCombiner combineFunction, PagedTypeSerializer<org.apache.flink.table.data.RowData> keySer, AbstractRowDataSerializer<org.apache.flink.table.data.RowData> inputSer, boolean requiresCopy, java.time.ZoneId shiftTimeZone)

方法概要

限定符和类型	方法和说明
void	addElement(org.apache.flink.table.data.RowData key, long sliceEnd, org.apache.flink.table.data.RowData element) Adds an element with associated key into the buffer.
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	close() Release resources allocated by this buffer.
void	flush() Flushes all intermediate buffered data to the underlying backend or output stream.

从类继承的方法 java.lang.Object

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

构造器详细资料

RecordsWindowBuffer

public RecordsWindowBuffer(Object operatorOwner,
                           org.apache.flink.runtime.memory.MemoryManager memoryManager,
                           long memorySize,
                           RecordsCombiner combineFunction,
                           PagedTypeSerializer<org.apache.flink.table.data.RowData> keySer,
                           AbstractRowDataSerializer<org.apache.flink.table.data.RowData> inputSer,
                           boolean requiresCopy,
                           java.time.ZoneId shiftTimeZone)

方法详细资料

addElement

public void addElement(org.apache.flink.table.data.RowData key,
                       long sliceEnd,
                       org.apache.flink.table.data.RowData element)
                throws Exception

从接口复制的说明: WindowBuffer

Adds an element with associated key into the buffer. The buffer may temporarily buffer the element, or immediately write it to the stream.

It may be that adding this element fills up an internal buffer and causes the buffer flushing of a batch of internally buffered elements.

指定者:

addElement 在接口中 WindowBuffer

参数:

key - the key associated with the element

element - The element to add.

抛出:

Exception - Thrown, if the element cannot be added to the buffer, or if the flushing throws an exception.

advanceProgress

public void advanceProgress(long progress)
                     throws Exception

从接口复制的说明: WindowBuffer

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 or to the output stream, because the watermark advancement may be in a very small step, but we don't need to flush buffered data for every watermark advancement.

指定者:

advanceProgress 在接口中 WindowBuffer

参数:

progress - the current progress time

抛出:

Exception

flush

public void flush()
           throws Exception

从接口复制的说明: WindowBuffer

Flushes all intermediate buffered data to the underlying backend or output stream.

指定者:

flush 在接口中 WindowBuffer

抛出:

Exception - Thrown if the buffer cannot be flushed, or if the output stream throws an exception.

close

public void close()
           throws Exception

从接口复制的说明: WindowBuffer

Release resources allocated by this buffer.

指定者:

close 在接口中 WindowBuffer

抛出:

Exception