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

Interface AllWindowFunction<IN,OUT,W extends Window>

Type Parameters:

IN - The type of the input value.

OUT - The type of the output value.

W - The type of Window that this window function can be applied on.

All Superinterfaces:

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

All Known Implementing Classes:

FoldApplyAllWindowFunction, PassThroughAllWindowFunction, ReduceApplyAllWindowFunction, ReduceIterableAllWindowFunction, RichAllWindowFunction

@Public
public interface AllWindowFunction<IN,OUT,W extends Window>
extends org.apache.flink.api.common.functions.Function, Serializable

Base interface for functions that are evaluated over non-keyed windows.

Method Summary

Modifier and Type	Method and Description
void	apply(W window, Iterable<IN> values, org.apache.flink.util.Collector<OUT> out) Evaluates the window and outputs none or several elements.

Method Detail

apply

void apply(W window,
           Iterable<IN> values,
           org.apache.flink.util.Collector<OUT> out)
    throws Exception

Evaluates the window and outputs none or several elements.

Parameters:

window - The window that is being evaluated.

values - 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.