Package org.apache.flink.runtime.state.v2.ttl

Class TtlAggregateFunction<IN,ACC,OUT>

java.lang.Object

org.apache.flink.runtime.state.ttl.AbstractTtlDecorator<org.apache.flink.api.common.functions.AggregateFunction<IN,ACC,OUT>>

org.apache.flink.runtime.state.v2.ttl.TtlAggregateFunction<IN,ACC,OUT>

Type Parameters:

IN - The type of the values that are aggregated (input values)

ACC - The type of the accumulator (intermediate aggregate state).

OUT - The type of the aggregated result

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.AggregateFunction<IN,TtlValue<ACC>,OUT>, org.apache.flink.api.common.functions.Function

public class TtlAggregateFunction<IN,ACC,OUT>
extends AbstractTtlDecorator<org.apache.flink.api.common.functions.AggregateFunction<IN,ACC,OUT>>
implements org.apache.flink.api.common.functions.AggregateFunction<IN,TtlValue<ACC>,OUT>

This class wraps aggregating function with TTL logic.

See Also:

• Serialized Form

Field Summary

Fields inherited from class org.apache.flink.runtime.state.ttl.AbstractTtlDecorator

config, original, returnExpired, timeProvider, ttl, updateTsOnRead

Constructor Summary

Constructors

Constructor	Description
TtlAggregateFunction(org.apache.flink.api.common.functions.AggregateFunction<IN,ACC,OUT> aggFunction, org.apache.flink.api.common.state.StateTtlConfig config, TtlTimeProvider timeProvider)

Method Summary

Modifier and Type	Method	Description
TtlValue<ACC>	add(IN value, TtlValue<ACC> accumulator)
TtlValue<ACC>	createAccumulator()
OUT	getResult(TtlValue<ACC> accumulator)
TtlValue<ACC>	merge(TtlValue<ACC> a, TtlValue<ACC> b)

Methods inherited from class org.apache.flink.runtime.state.ttl.AbstractTtlDecorator

expired, getElementWithTtlCheck, getUnexpired, getWithTtlCheckAndUpdate, getWrappedWithTtlCheckAndUpdate, rewrapWithNewTs, wrapWithTs

Methods inherited from class java.lang.Object

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

Constructor Details

TtlAggregateFunction

public TtlAggregateFunction(org.apache.flink.api.common.functions.AggregateFunction<IN,ACC,OUT> aggFunction,
 org.apache.flink.api.common.state.StateTtlConfig config,
 TtlTimeProvider timeProvider)

Method Details

createAccumulator

public TtlValue<ACC> createAccumulator()

Specified by:

createAccumulator in interface org.apache.flink.api.common.functions.AggregateFunction<IN,ACC,OUT>

add

public TtlValue<ACC> add(IN value,
 TtlValue<ACC> accumulator)

Specified by:

add in interface org.apache.flink.api.common.functions.AggregateFunction<IN,ACC,OUT>

getResult

public OUT getResult(TtlValue<ACC> accumulator)

Specified by:

getResult in interface org.apache.flink.api.common.functions.AggregateFunction<IN,ACC,OUT>

merge

public TtlValue<ACC> merge(TtlValue<ACC> a,
 TtlValue<ACC> b)

Specified by:

merge in interface org.apache.flink.api.common.functions.AggregateFunction<IN,ACC,OUT>