org.apache.flink.runtime.state.heap

Class HeapReducingState<K,N,V>

java.lang.Object

org.apache.flink.runtime.state.heap.AbstractHeapState<K,N,SV,S,SD>

org.apache.flink.runtime.state.heap.AbstractHeapMergingState<K,N,V,V,V,ReducingState<V>,ReducingStateDescriptor<V>>

org.apache.flink.runtime.state.heap.HeapReducingState<K,N,V>

Type Parameters:

K - The type of the key.

N - The type of the namespace.

V - The type of the value.

All Implemented Interfaces:

AppendingState<V,V>, MergingState<V,V>, ReducingState<V>, State, InternalAppendingState<N,V,V>, InternalKvState<N>, InternalMergingState<N,V,V>, InternalReducingState<N,V>

public class HeapReducingState<K,N,V>
extends AbstractHeapMergingState<K,N,V,V,V,ReducingState<V>,ReducingStateDescriptor<V>>
implements InternalReducingState<N,V>

Heap-backed partitioned ReducingState that is snapshotted into files.

Field Summary

Fields inherited from class org.apache.flink.runtime.state.heap.AbstractHeapState

currentNamespace, keySerializer, namespaceSerializer, stateDesc, stateTable

Constructor Summary

Constructors

Constructor and Description
HeapReducingState(ReducingStateDescriptor<V> stateDesc, StateTable<K,N,V> stateTable, TypeSerializer<K> keySerializer, TypeSerializer<N> namespaceSerializer) Creates a new key/value state for the given hash map of key/value pairs.

Method Summary

Methods

Modifier and Type	Method and Description
void	add(V value)
V	get()
protected V	mergeState(V a, V b)

Methods inherited from class org.apache.flink.runtime.state.heap.AbstractHeapMergingState

mergeNamespaces

Methods inherited from class org.apache.flink.runtime.state.heap.AbstractHeapState

clear, getSerializedValue, getSerializedValue, getStateTable, 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.internal.InternalMergingState

mergeNamespaces

Methods inherited from interface org.apache.flink.runtime.state.internal.InternalKvState

getSerializedValue, setCurrentNamespace

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

clear

Constructor Detail

HeapReducingState

public HeapReducingState(ReducingStateDescriptor<V> stateDesc,
                 StateTable<K,N,V> stateTable,
                 TypeSerializer<K> keySerializer,
                 TypeSerializer<N> namespaceSerializer)

Creates a new key/value state for the given hash map of key/value pairs.

Parameters:

stateDesc - The state identifier for the state. This contains name and can create a default state value.

stateTable - The state table to use in this kev/value state. May contain initial state.

Method Detail

get

public V get()

Specified by:

get in interface AppendingState<V,V>

add

public void add(V value)
         throws IOException

Specified by:

add in interface AppendingState<V,V>

Throws:

IOException

mergeState

protected V mergeState(V a,
           V b)
                throws Exception

Specified by:

mergeState in class AbstractHeapMergingState<K,N,V,V,V,ReducingState<V>,ReducingStateDescriptor<V>>

Throws:

Exception