org.apache.flink.table.runtime.operators.rank.window.combines

类 TopNRecordsCombiner

java.lang.Object

org.apache.flink.table.runtime.operators.rank.window.combines.TopNRecordsCombiner

所有已实现的接口:

RecordsCombiner

public final class TopNRecordsCombiner
extends Object
implements RecordsCombiner

An implementation of RecordsCombiner that save topN records of incremental input records into the window state.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	TopNRecordsCombiner.Factory Factory to create TopNRecordsCombiner.

从接口继承的嵌套类/接口 org.apache.flink.table.runtime.operators.window.combines.RecordsCombiner

RecordsCombiner.LocalFactory

构造器概要

构造器

构造器和说明

TopNRecordsCombiner(WindowTimerService<Long> timerService, StateKeyContext keyContext, WindowMapState<Long,List<org.apache.flink.table.data.RowData>> dataState, Comparator<org.apache.flink.table.data.RowData> sortKeyComparator, org.apache.flink.api.java.functions.KeySelector<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData> sortKeySelector, long topN, org.apache.flink.api.common.typeutils.TypeSerializer<org.apache.flink.table.data.RowData> recordSerializer, boolean isEventTime)

方法概要

限定符和类型	方法和说明
void	close() Release resources allocated by this combine function.
void	combine(WindowKey windowKey, Iterator<org.apache.flink.table.data.RowData> records) Combines the buffered data into state based on the given window-key pair.

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

TopNRecordsCombiner

public TopNRecordsCombiner(WindowTimerService<Long> timerService,
                           StateKeyContext keyContext,
                           WindowMapState<Long,List<org.apache.flink.table.data.RowData>> dataState,
                           Comparator<org.apache.flink.table.data.RowData> sortKeyComparator,
                           org.apache.flink.api.java.functions.KeySelector<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData> sortKeySelector,
                           long topN,
                           org.apache.flink.api.common.typeutils.TypeSerializer<org.apache.flink.table.data.RowData> recordSerializer,
                           boolean isEventTime)

方法详细资料

combine

public void combine(WindowKey windowKey,
                    Iterator<org.apache.flink.table.data.RowData> records)
             throws Exception

从接口复制的说明: RecordsCombiner

Combines the buffered data into state based on the given window-key pair.

指定者:

combine 在接口中 RecordsCombiner

参数:

windowKey - the window-key pair that the buffered data belong to, the window-key object is reused.

records - the buffered data, the iterator and RowData objects are reused.

抛出:

Exception

close

public void close()
           throws Exception

从接口复制的说明: RecordsCombiner

Release resources allocated by this combine function.

指定者:

close 在接口中 RecordsCombiner

抛出:

Exception