org.apache.flink.streaming.api.functions.windowing

类 ReduceApplyProcessWindowFunction<K,W extends Window,T,R>

java.lang.Object

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

org.apache.flink.streaming.api.functions.windowing.ProcessWindowFunction<T,R,K,W>

org.apache.flink.streaming.api.functions.windowing.ReduceApplyProcessWindowFunction<K,W,T,R>

所有已实现的接口:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.RichFunction

@Internal
public class ReduceApplyProcessWindowFunction<K,W extends Window,T,R>
extends ProcessWindowFunction<T,R,K,W>

Internal ProcessWindowFunction that is used for implementing a fold on a window configuration that only allows AllWindowFunction and cannot directly execute a ReduceFunction.

另请参阅:

序列化表格

嵌套类概要

从类继承的嵌套类/接口 org.apache.flink.streaming.api.functions.windowing.ProcessWindowFunction

ProcessWindowFunction.Context

构造器概要

构造器

构造器和说明
ReduceApplyProcessWindowFunction(org.apache.flink.api.common.functions.ReduceFunction<T> reduceFunction, ProcessWindowFunction<T,R,K,W> windowFunction)

方法概要

限定符和类型	方法和说明
void	clear(ProcessWindowFunction.Context context) Deletes any state in the Context when the Window expires (the watermark passes its maxTimestamp + allowedLateness).
void	close()
void	open(org.apache.flink.configuration.Configuration configuration)
void	process(K k, ProcessWindowFunction.Context context, Iterable<T> input, org.apache.flink.util.Collector<R> out) Evaluates the window and outputs none or several elements.
void	setRuntimeContext(org.apache.flink.api.common.functions.RuntimeContext t)

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

getIterationRuntimeContext, getRuntimeContext

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

ReduceApplyProcessWindowFunction

public ReduceApplyProcessWindowFunction(org.apache.flink.api.common.functions.ReduceFunction<T> reduceFunction,
                                        ProcessWindowFunction<T,R,K,W> windowFunction)

方法详细资料

process

public void process(K k,
                    ProcessWindowFunction.Context context,
                    Iterable<T> input,
                    org.apache.flink.util.Collector<R> out)
             throws Exception

从类复制的说明: ProcessWindowFunction

Evaluates the window and outputs none or several elements.

指定者:

process 在类中 ProcessWindowFunction<T,R,K,W extends Window>

参数:

k - The key for which this window is evaluated.

context - The context in which the window is being evaluated.

input - The elements in the window being evaluated.

out - A collector for emitting elements.

抛出:

Exception - The function may throw exceptions to fail the program and trigger recovery.

clear

public void clear(ProcessWindowFunction.Context context)
           throws Exception

从类复制的说明: ProcessWindowFunction

Deletes any state in the Context when the Window expires (the watermark passes its maxTimestamp + allowedLateness).

覆盖:

clear 在类中 ProcessWindowFunction<T,R,K,W extends Window>

参数:

context - The context to which the window is being evaluated

抛出:

Exception - The function may throw exceptions to fail the program and trigger recovery.

open

public void open(org.apache.flink.configuration.Configuration configuration)
          throws Exception

指定者:

open 在接口中 org.apache.flink.api.common.functions.RichFunction

覆盖:

open 在类中 org.apache.flink.api.common.functions.AbstractRichFunction

抛出:

Exception

close

public void close()
           throws Exception

指定者:

close 在接口中 org.apache.flink.api.common.functions.RichFunction

覆盖:

close 在类中 org.apache.flink.api.common.functions.AbstractRichFunction

抛出:

Exception

setRuntimeContext

public void setRuntimeContext(org.apache.flink.api.common.functions.RuntimeContext t)

指定者:

setRuntimeContext 在接口中 org.apache.flink.api.common.functions.RichFunction

覆盖:

setRuntimeContext 在类中 org.apache.flink.api.common.functions.AbstractRichFunction