org.apache.flink.runtime.state.heap

Class HeapListState<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,Iterable<V>,ArrayList<V>,ListState<V>,ListStateDescriptor<V>>

org.apache.flink.runtime.state.heap.HeapListState<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,Iterable<V>>, ListState<V>, MergingState<V,Iterable<V>>, State, InternalAppendingState<N,V,Iterable<V>>, InternalKvState<N>, InternalListState<N,V>, InternalMergingState<N,V,Iterable<V>>

public class HeapListState<K,N,V>
extends AbstractHeapMergingState<K,N,V,Iterable<V>,ArrayList<V>,ListState<V>,ListStateDescriptor<V>>
implements InternalListState<N,V>

Heap-backed partitioned ListState 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
HeapListState(ListStateDescriptor<V> stateDesc, StateTable<K,N,ArrayList<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)
Iterable<V>	get()
byte[]	getSerializedValue(K key, N namespace)
protected ArrayList<V>	mergeState(ArrayList<V> a, ArrayList<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, 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

HeapListState

public HeapListState(ListStateDescriptor<V> stateDesc,
             StateTable<K,N,ArrayList<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 tab;e to use in this kev/value state. May contain initial state.

Method Detail

get

public Iterable<V> get()

Specified by:

get in interface AppendingState<V,Iterable<V>>

add

public void add(V value)

Specified by:

add in interface AppendingState<V,Iterable<V>>

getSerializedValue

public byte[] getSerializedValue(K key,
                        N namespace)
                          throws Exception

Overrides:

getSerializedValue in class AbstractHeapState<K,N,ArrayList<V>,ListState<V>,ListStateDescriptor<V>>

Throws:

Exception

mergeState

protected ArrayList<V> mergeState(ArrayList<V> a,
                      ArrayList<V> b)

Specified by:

mergeState in class AbstractHeapMergingState<K,N,V,Iterable<V>,ArrayList<V>,ListState<V>,ListStateDescriptor<V>>