org.apache.flink.state.api.input.operator.window

类 EvictingWindowReaderFunction<IN,R,OUT,KEY,W extends org.apache.flink.streaming.api.windowing.windows.Window>

java.lang.Object

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

org.apache.flink.state.api.functions.WindowReaderFunction<org.apache.flink.streaming.runtime.streamrecord.StreamRecord<IN>,OUT,KEY,W>

org.apache.flink.state.api.input.operator.window.EvictingWindowReaderFunction<IN,R,OUT,KEY,W>

类型参数:

IN - The input type stored in state.

R - The aggregated type.

OUT - The output type of the reader function.

KEY - The key type.

W - The window type.

所有已实现的接口:

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

直接已知子类:

AggregateEvictingWindowReaderFunction, ProcessEvictingWindowReader, ReduceEvictingWindowReaderFunction

@Internal
public abstract class EvictingWindowReaderFunction<IN,R,OUT,KEY,W extends org.apache.flink.streaming.api.windowing.windows.Window>
extends WindowReaderFunction<org.apache.flink.streaming.runtime.streamrecord.StreamRecord<IN>,OUT,KEY,W>

Wrapper for reading state from an evicting window operator.

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.state.api.functions.WindowReaderFunction

WindowReaderFunction.Context<W extends org.apache.flink.streaming.api.windowing.windows.Window>

构造器概要

构造器

限定符	构造器和说明
protected	EvictingWindowReaderFunction(WindowReaderFunction<R,OUT,KEY,W> wrappedFunction)

方法概要

限定符和类型	方法和说明
void	close()
void	open(org.apache.flink.configuration.Configuration parameters)
void	readWindow(KEY key, WindowReaderFunction.Context<W> context, Iterable<org.apache.flink.streaming.runtime.streamrecord.StreamRecord<IN>> elements, org.apache.flink.util.Collector<OUT> out) Evaluates the window and outputs none or several elements.
void	setRuntimeContext(org.apache.flink.api.common.functions.RuntimeContext t)
abstract Iterable<R>	transform(Iterable<org.apache.flink.streaming.runtime.streamrecord.StreamRecord<IN>> elements)

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

EvictingWindowReaderFunction

protected EvictingWindowReaderFunction(WindowReaderFunction<R,OUT,KEY,W> wrappedFunction)

方法详细资料

open

public void open(org.apache.flink.configuration.Configuration parameters)
          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

readWindow

public void readWindow(KEY key,
                       WindowReaderFunction.Context<W> context,
                       Iterable<org.apache.flink.streaming.runtime.streamrecord.StreamRecord<IN>> elements,
                       org.apache.flink.util.Collector<OUT> out)
                throws Exception

从类复制的说明: WindowReaderFunction

Evaluates the window and outputs none or several elements.

指定者:

readWindow 在类中 WindowReaderFunction<org.apache.flink.streaming.runtime.streamrecord.StreamRecord<IN>,OUT,KEY,W extends org.apache.flink.streaming.api.windowing.windows.Window>

参数:

key - The key for which this window is evaluated.

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

elements - 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.

transform

public abstract Iterable<R> transform(Iterable<org.apache.flink.streaming.runtime.streamrecord.StreamRecord<IN>> elements)
                               throws Exception

抛出:

Exception