org.apache.flink.api.java.functions

类 GroupReduceIterator<IN,OUT>

java.lang.Object

org.apache.flink.api.common.functions.AbstractRichFunction

org.apache.flink.api.common.functions.RichGroupReduceFunction<IN,OUT>

org.apache.flink.api.java.functions.GroupReduceIterator<IN,OUT>

类型参数:

IN -

OUT -

所有已实现的接口:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.GroupReduceFunction<IN,OUT>, org.apache.flink.api.common.functions.RichFunction

已过时。

All Flink DataSet APIs are deprecated since Flink 1.18 and will be removed in a future Flink major version. You can still build your application in DataSet, but you should move to either the DataStream and/or Table API.

@Deprecated
 @PublicEvolving
public abstract class GroupReduceIterator<IN,OUT>
extends org.apache.flink.api.common.functions.RichGroupReduceFunction<IN,OUT>

Base class that simplifies reducing all values provided as Iterable.

另请参阅:

FLIP-131: Consolidate the user-facing Dataflow SDKs/APIs (and deprecate the DataSet API, 序列化表格

构造器概要

构造器

构造器和说明
GroupReduceIterator() 已过时。

方法概要

限定符和类型	方法和说明
void	reduce(Iterable<IN> values, org.apache.flink.util.Collector<OUT> out) 已过时。
abstract Iterator<OUT>	reduceGroup(Iterable<IN> values) 已过时。

从类继承的方法 org.apache.flink.api.common.functions.AbstractRichFunction

close, getIterationRuntimeContext, getRuntimeContext, open, setRuntimeContext

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.flink.api.common.functions.RichFunction

open

构造器详细资料

GroupReduceIterator

public GroupReduceIterator()

已过时。

方法详细资料

reduceGroup

public abstract Iterator<OUT> reduceGroup(Iterable<IN> values)
                                   throws Exception

已过时。

抛出:

Exception

reduce

public final void reduce(Iterable<IN> values,
                         org.apache.flink.util.Collector<OUT> out)
                  throws Exception

已过时。

指定者:

reduce 在接口中 org.apache.flink.api.common.functions.GroupReduceFunction<IN,OUT>

指定者:

reduce 在类中 org.apache.flink.api.common.functions.RichGroupReduceFunction<IN,OUT>

抛出:

Exception