Package org.apache.flink.streaming.runtime.operators.windowing.functions

Class InternalSingleValueWindowFunction<IN,OUT,KEY,W extends Window>

java.lang.Object

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

org.apache.flink.api.common.functions.WrappingFunction<WindowFunction<IN,OUT,KEY,W>>

org.apache.flink.streaming.runtime.operators.windowing.functions.InternalSingleValueWindowFunction<IN,OUT,KEY,W>

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.RichFunction, InternalWindowFunction<IN,OUT,KEY,W>

public final class InternalSingleValueWindowFunction<IN,OUT,KEY,W extends Window>
extends org.apache.flink.api.common.functions.WrappingFunction<WindowFunction<IN,OUT,KEY,W>>
implements InternalWindowFunction<IN,OUT,KEY,W>

Internal window function for wrapping a WindowFunction that takes an Iterable when the window state is a single value.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.streaming.runtime.operators.windowing.functions.InternalWindowFunction

InternalWindowFunction.InternalWindowContext

Field Summary

Fields inherited from class org.apache.flink.api.common.functions.WrappingFunction

wrappedFunction

Constructor Summary

Constructors

Constructor	Description
InternalSingleValueWindowFunction(WindowFunction<IN,OUT,KEY,W> wrappedFunction)

Method Summary

Modifier and Type	Method	Description
void	clear(W window, InternalWindowFunction.InternalWindowContext context)	Deletes any state in the Context when the Window expires (the watermark passes its maxTimestamp + allowedLateness).
org.apache.flink.api.common.functions.IterationRuntimeContext	getIterationRuntimeContext()
org.apache.flink.api.common.functions.RuntimeContext	getRuntimeContext()
void	process(KEY key, W window, InternalWindowFunction.InternalWindowContext context, IN input, org.apache.flink.util.Collector<OUT> out)	Evaluates the window and outputs none or several elements.

Methods inherited from class org.apache.flink.api.common.functions.WrappingFunction

close, getWrappedFunction, open, setRuntimeContext

Methods inherited from class java.lang.Object

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

Constructor Detail

InternalSingleValueWindowFunction

public InternalSingleValueWindowFunction(WindowFunction<IN,OUT,KEY,W> wrappedFunction)

Method Detail

process

public void process(KEY key,
                    W window,
                    InternalWindowFunction.InternalWindowContext context,
                    IN input,
                    org.apache.flink.util.Collector<OUT> out)
             throws Exception

Description copied from interface: InternalWindowFunction

Evaluates the window and outputs none or several elements.

Specified by:

process in interface InternalWindowFunction<IN,OUT,KEY,W extends Window>

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

input - The elements in the window being evaluated.

out - A collector for emitting elements.

Throws:

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

clear

public void clear(W window,
                  InternalWindowFunction.InternalWindowContext context)
           throws Exception

Description copied from interface: InternalWindowFunction

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

Specified by:

clear in interface InternalWindowFunction<IN,OUT,KEY,W extends Window>

context - The context to which the window is being evaluated

Throws:

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

getRuntimeContext

public org.apache.flink.api.common.functions.RuntimeContext getRuntimeContext()

Specified by:

getRuntimeContext in interface org.apache.flink.api.common.functions.RichFunction

Overrides:

getRuntimeContext in class org.apache.flink.api.common.functions.AbstractRichFunction

getIterationRuntimeContext

public org.apache.flink.api.common.functions.IterationRuntimeContext getIterationRuntimeContext()

Specified by:

getIterationRuntimeContext in interface org.apache.flink.api.common.functions.RichFunction

Overrides:

getIterationRuntimeContext in class org.apache.flink.api.common.functions.AbstractRichFunction