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

Class ReducingStateDescriptor<T>

java.lang.Object

org.apache.flink.runtime.state.v2.StateDescriptor<T>

org.apache.flink.runtime.state.v2.ReducingStateDescriptor<T>

Type Parameters:

T - The type of the values that can be added to the state.

All Implemented Interfaces:

Serializable

public class ReducingStateDescriptor<T>
extends StateDescriptor<T>

StateDescriptor for ReducingState.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.runtime.state.v2.StateDescriptor

StateDescriptor.Type

Constructor Summary

Constructors

Constructor	Description
ReducingStateDescriptor(String name, org.apache.flink.api.common.functions.ReduceFunction<T> reduceFunction, org.apache.flink.api.common.typeinfo.TypeInformation<T> typeInfo)	Creates a new ReducingStateDescriptor with the given name and default value.
ReducingStateDescriptor(String name, org.apache.flink.api.common.functions.ReduceFunction<T> reduceFunction, org.apache.flink.api.common.typeinfo.TypeInformation<T> typeInfo, org.apache.flink.api.common.serialization.SerializerConfig serializerConfig)	Creates a new ReducingStateDescriptor with the given name and default value.

Method Summary

Modifier and Type	Method	Description
org.apache.flink.api.common.functions.ReduceFunction<T>	getReduceFunction()	Returns the reduce function to be used for the reducing state.
StateDescriptor.Type	getType()	Return the specific Type of described state.

Methods inherited from class org.apache.flink.runtime.state.v2.StateDescriptor

enableTimeToLive, equals, getSerializer, getStateId, getTtlConfig, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ReducingStateDescriptor

public ReducingStateDescriptor(String name,
                               org.apache.flink.api.common.functions.ReduceFunction<T> reduceFunction,
                               org.apache.flink.api.common.typeinfo.TypeInformation<T> typeInfo)

Creates a new ReducingStateDescriptor with the given name and default value.

Parameters:

name - The (unique) name for the state.

reduceFunction - The ReduceFunction used to aggregate the state.

typeInfo - The type of the values in the state.

ReducingStateDescriptor

public ReducingStateDescriptor(String name,
                               org.apache.flink.api.common.functions.ReduceFunction<T> reduceFunction,
                               org.apache.flink.api.common.typeinfo.TypeInformation<T> typeInfo,
                               org.apache.flink.api.common.serialization.SerializerConfig serializerConfig)

Creates a new ReducingStateDescriptor with the given name and default value.

Parameters:

name - The (unique) name for the state.

reduceFunction - The ReduceFunction used to aggregate the state.

typeInfo - The type of the values in the state.

Method Detail

getReduceFunction

public org.apache.flink.api.common.functions.ReduceFunction<T> getReduceFunction()

Returns the reduce function to be used for the reducing state.

getType

public StateDescriptor.Type getType()

Description copied from class: StateDescriptor

Return the specific Type of described state.

Specified by:

getType in class StateDescriptor<T>