org.apache.flink.runtime.state.heap

Class HeapAggregatingState<K,N,IN,ACC,OUT>

java.lang.Object

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

org.apache.flink.runtime.state.heap.AbstractHeapMergingState<K,N,IN,OUT,ACC,AggregatingState<IN,OUT>,AggregatingStateDescriptor<IN,ACC,OUT>>

org.apache.flink.runtime.state.heap.HeapAggregatingState<K,N,IN,ACC,OUT>

Type Parameters:

K - The type of the key.

N - The type of the namespace.

IN - The type of the value added to the state.

ACC - The type of the value stored in the state (the accumulator type).

OUT - The type of the value returned from the state.

All Implemented Interfaces:

AggregatingState<IN,OUT>, AppendingState<IN,OUT>, MergingState<IN,OUT>, State, InternalAggregatingState<N,IN,OUT>, InternalAppendingState<N,IN,OUT>, InternalKvState<N>, InternalMergingState<N,IN,OUT>

public class HeapAggregatingState<K,N,IN,ACC,OUT>
extends AbstractHeapMergingState<K,N,IN,OUT,ACC,AggregatingState<IN,OUT>,AggregatingStateDescriptor<IN,ACC,OUT>>
implements InternalAggregatingState<N,IN,OUT>

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
HeapAggregatingState(AggregatingStateDescriptor<IN,ACC,OUT> stateDesc, StateTable<K,N,ACC> 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(IN value)
OUT	get()
protected ACC	mergeState(ACC a, ACC 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

HeapAggregatingState

public HeapAggregatingState(AggregatingStateDescriptor<IN,ACC,OUT> stateDesc,
                    StateTable<K,N,ACC> 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.

namespaceSerializer - The serializer for the type that indicates the namespace

Method Detail

get

public OUT get()

Specified by:

get in interface AppendingState<IN,OUT>

add

public void add(IN value)
         throws IOException

Specified by:

add in interface AppendingState<IN,OUT>

Throws:

IOException

mergeState

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

Specified by:

mergeState in class AbstractHeapMergingState<K,N,IN,OUT,ACC,AggregatingState<IN,OUT>,AggregatingStateDescriptor<IN,ACC,OUT>>

Throws:

Exception