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

Class AbstractReducingState<K,N,V>

java.lang.Object

org.apache.flink.runtime.state.v2.AbstractKeyedState<K,N,V>

org.apache.flink.runtime.state.v2.AbstractReducingState<K,N,V>

Type Parameters:

K - The type of key the state is associated to.

V - The type of values kept internally in state.

All Implemented Interfaces:

org.apache.flink.api.common.state.v2.AggregatingState<V,V>, org.apache.flink.api.common.state.v2.AppendingState<V,V,V>, org.apache.flink.api.common.state.v2.MergingState<V,V,V>, org.apache.flink.api.common.state.v2.ReducingState<V>, org.apache.flink.api.common.state.v2.State, InternalAggregatingState<K,N,V,V,V>, InternalAppendingState<K,N,V,V,V,V>, InternalKeyedState<K,N,V>, InternalMergingState<K,N,V,V,V,V>, InternalPartitionedState<N>, InternalReducingState<K,N,V>, InternalStateAccessible<V>

public class AbstractReducingState<K,N,V>
extends AbstractKeyedState<K,N,V>
implements InternalReducingState<K,N,V>

A default implementation of ReducingState which delegates all async requests to StateRequestHandler.

Field Summary

Fields

Modifier and Type	Field	Description
protected org.apache.flink.api.common.functions.ReduceFunction<V>	reduceFunction

Fields inherited from class org.apache.flink.runtime.state.v2.AbstractKeyedState

stateRequestHandler

Constructor Summary

Constructors

Constructor	Description
AbstractReducingState(StateRequestHandler stateRequestHandler, org.apache.flink.api.common.state.v2.ReducingStateDescriptor<V> stateDescriptor)

Method Summary

Modifier and Type	Method	Description
void	add(V value)
org.apache.flink.api.common.state.v2.StateFuture<Void>	asyncAdd(V value)
org.apache.flink.api.common.state.v2.StateFuture<V>	asyncGet()
org.apache.flink.api.common.state.v2.StateFuture<V>	asyncGetInternal()	Get internally stored value.
org.apache.flink.api.common.state.v2.StateFuture<Void>	asyncMergeNamespaces(N target, Collection<N> sources)	Merges the state of the current key for the given source namespaces into the state of the target namespace.
org.apache.flink.api.common.state.v2.StateFuture<Void>	asyncUpdateInternal(V valueToStore)	Update internally stored value.
V	get()
V	getInternal()	Get internally stored value.
void	mergeNamespaces(N target, Collection<N> sources)	Merges the state of the current key for the given source namespaces into the state of the target namespace.
void	updateInternal(V valueToStore)	Update internally stored value.

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

asyncClear, clear, getStateDescriptor, getStateRequestHandler, getValueSerializer, handleRequest, handleRequestSync, setCurrentNamespace

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.runtime.state.v2.internal.InternalPartitionedState

setCurrentNamespace

Methods inherited from interface org.apache.flink.api.common.state.v2.State

asyncClear, clear

Field Detail

reduceFunction

protected final org.apache.flink.api.common.functions.ReduceFunction<V> reduceFunction

Constructor Detail

AbstractReducingState

public AbstractReducingState(StateRequestHandler stateRequestHandler,
                             org.apache.flink.api.common.state.v2.ReducingStateDescriptor<V> stateDescriptor)

Method Detail

asyncGet

public org.apache.flink.api.common.state.v2.StateFuture<V> asyncGet()

Specified by:

asyncGet in interface org.apache.flink.api.common.state.v2.AppendingState<K,N,V>

asyncAdd

public org.apache.flink.api.common.state.v2.StateFuture<Void> asyncAdd(V value)

Specified by:

asyncAdd in interface org.apache.flink.api.common.state.v2.AppendingState<K,N,V>

get

public V get()

Specified by:

get in interface org.apache.flink.api.common.state.v2.AppendingState<K,N,V>

add

public void add(V value)

Specified by:

add in interface org.apache.flink.api.common.state.v2.AppendingState<K,N,V>

asyncMergeNamespaces

public org.apache.flink.api.common.state.v2.StateFuture<Void> asyncMergeNamespaces(N target,
                                                                                   Collection<N> sources)

Description copied from interface: InternalMergingState

Merges the state of the current key for the given source namespaces into the state of the target namespace.

Specified by:

asyncMergeNamespaces in interface InternalMergingState<K,N,V,V,V,V>

Parameters:

target - The target namespace where the merged state should be stored.

sources - The source namespaces whose state should be merged.

mergeNamespaces

public void mergeNamespaces(N target,
                            Collection<N> sources)

Description copied from interface: InternalMergingState

Merges the state of the current key for the given source namespaces into the state of the target namespace.

Specified by:

mergeNamespaces in interface InternalMergingState<K,N,V,V,V,V>

Parameters:

target - The target namespace where the merged state should be stored.

sources - The source namespaces whose state should be merged.

asyncGetInternal

public org.apache.flink.api.common.state.v2.StateFuture<V> asyncGetInternal()

Description copied from interface: InternalStateAccessible

Get internally stored value.

Specified by:

asyncGetInternal in interface InternalStateAccessible<K>

Returns:

internally stored value.

asyncUpdateInternal

public org.apache.flink.api.common.state.v2.StateFuture<Void> asyncUpdateInternal(V valueToStore)

Description copied from interface: InternalStateAccessible

Update internally stored value.

Specified by:

asyncUpdateInternal in interface InternalStateAccessible<K>

Parameters:

valueToStore - new value to store.

getInternal

public V getInternal()

Description copied from interface: InternalStateAccessible

Get internally stored value.

Specified by:

getInternal in interface InternalStateAccessible<K>

Returns:

internally stored value.

updateInternal

public void updateInternal(V valueToStore)

Description copied from interface: InternalStateAccessible

Update internally stored value.

Specified by:

updateInternal in interface InternalStateAccessible<K>

Parameters:

valueToStore - new value to store.