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

Class InternalAggregateProcessWindowFunction<T,ACC,V,R,K,W extends Window>

java.lang.Object

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

org.apache.flink.api.java.operators.translation.WrappingFunction<ProcessWindowFunction<V,R,K,W>>

org.apache.flink.streaming.runtime.operators.windowing.functions.InternalAggregateProcessWindowFunction<T,ACC,V,R,K,W>

Type Parameters:

K - The key type

W - The window type

T - The type of the input to the AggregateFunction

ACC - The type of the AggregateFunction's accumulator

V - The type of the AggregateFunction's result, and the input to the WindowFunction

R - The result type of the WindowFunction

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.RichFunction, InternalWindowFunction<Iterable<T>,R,K,W>

public final class InternalAggregateProcessWindowFunction<T,ACC,V,R,K,W extends Window>
extends org.apache.flink.api.java.operators.translation.WrappingFunction<ProcessWindowFunction<V,R,K,W>>
implements InternalWindowFunction<Iterable<T>,R,K,W>

Internal window function for wrapping a ProcessWindowFunction that takes an Iterable and an AggregateFunction.

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.java.operators.translation.WrappingFunction

wrappedFunction

Constructor Summary

Constructors

Constructor and Description
InternalAggregateProcessWindowFunction(org.apache.flink.api.common.functions.AggregateFunction<T,ACC,V> aggFunction, ProcessWindowFunction<V,R,K,W> windowFunction)

Method Summary

Modifier and Type	Method and 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(K key, W window, InternalWindowFunction.InternalWindowContext context, Iterable<T> input, org.apache.flink.util.Collector<R> out) Evaluates the window and outputs none or several elements.

Methods inherited from class org.apache.flink.api.java.operators.translation.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

InternalAggregateProcessWindowFunction

public InternalAggregateProcessWindowFunction(org.apache.flink.api.common.functions.AggregateFunction<T,ACC,V> aggFunction,
                                              ProcessWindowFunction<V,R,K,W> windowFunction)

Method Detail

process

public void process(K key,
                    W window,
                    InternalWindowFunction.InternalWindowContext context,
                    Iterable<T> input,
                    org.apache.flink.util.Collector<R> out)
             throws Exception

Description copied from interface: InternalWindowFunction

Evaluates the window and outputs none or several elements.

Specified by:

process in interface InternalWindowFunction<Iterable<T>,R,K,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<Iterable<T>,R,K,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