org.apache.flink.contrib.streaming.state

Class RocksDBValueState<K,N,V>

java.lang.Object

org.apache.flink.contrib.streaming.state.AbstractRocksDBState<K,N,V,org.apache.flink.api.common.state.ValueState<V>>

org.apache.flink.contrib.streaming.state.RocksDBValueState<K,N,V>

Type Parameters:

K - The type of the key.

N - The type of the namespace.

V - The type of value that the state state stores.

All Implemented Interfaces:

org.apache.flink.api.common.state.State, org.apache.flink.api.common.state.ValueState<V>, org.apache.flink.runtime.state.internal.InternalKvState<K,N,V>, org.apache.flink.runtime.state.internal.InternalValueState<K,N,V>

public class RocksDBValueState<K,N,V>
extends AbstractRocksDBState<K,N,V,org.apache.flink.api.common.state.ValueState<V>>
implements org.apache.flink.runtime.state.internal.InternalValueState<K,N,V>

ValueState implementation that stores state in RocksDB.

Field Summary

Fields inherited from class org.apache.flink.contrib.streaming.state.AbstractRocksDBState

backend, columnFamily, defaultValue, keySerializationDataOutputView, keySerializationStream, writeOptions

Constructor Summary

Constructors

Constructor and Description
RocksDBValueState(org.rocksdb.ColumnFamilyHandle columnFamily, org.apache.flink.api.common.typeutils.TypeSerializer<N> namespaceSerializer, org.apache.flink.api.common.typeutils.TypeSerializer<V> valueSerializer, V defaultValue, RocksDBKeyedStateBackend<K> backend) Creates a new RocksDBValueState.

Method Summary

Modifier and Type	Method and Description
org.apache.flink.api.common.typeutils.TypeSerializer<K>	getKeySerializer()
org.apache.flink.api.common.typeutils.TypeSerializer<N>	getNamespaceSerializer()
org.apache.flink.api.common.typeutils.TypeSerializer<V>	getValueSerializer()
void	update(V value)
V	value()

Methods inherited from class org.apache.flink.contrib.streaming.state.AbstractRocksDBState

clear, getDefaultValue, getSerializedValue, setCurrentNamespace, writeCurrentKeyWithGroupAndNamespace, writeKeyWithGroupAndNamespace, writeKeyWithGroupAndNamespace

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.InternalKvState

getSerializedValue, setCurrentNamespace

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

clear

Constructor Detail

RocksDBValueState

public RocksDBValueState(org.rocksdb.ColumnFamilyHandle columnFamily,
                         org.apache.flink.api.common.typeutils.TypeSerializer<N> namespaceSerializer,
                         org.apache.flink.api.common.typeutils.TypeSerializer<V> valueSerializer,
                         V defaultValue,
                         RocksDBKeyedStateBackend<K> backend)

Creates a new RocksDBValueState.

Parameters:

columnFamily - The RocksDB column family that this state is associated to.

namespaceSerializer - The serializer for the namespace.

valueSerializer - The serializer for the state.

defaultValue - The default value for the state.

backend - The backend for which this state is bind to.

Method Detail

getKeySerializer

public org.apache.flink.api.common.typeutils.TypeSerializer<K> getKeySerializer()

Specified by:

getKeySerializer in interface org.apache.flink.runtime.state.internal.InternalKvState<K,N,V>

getNamespaceSerializer

public org.apache.flink.api.common.typeutils.TypeSerializer<N> getNamespaceSerializer()

Specified by:

getNamespaceSerializer in interface org.apache.flink.runtime.state.internal.InternalKvState<K,N,V>

getValueSerializer

public org.apache.flink.api.common.typeutils.TypeSerializer<V> getValueSerializer()

Specified by:

getValueSerializer in interface org.apache.flink.runtime.state.internal.InternalKvState<K,N,V>

value

public V value()

Specified by:

value in interface org.apache.flink.api.common.state.ValueState<V>

update

public void update(V value)
            throws IOException

Specified by:

update in interface org.apache.flink.api.common.state.ValueState<V>

Throws:

IOException