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

Class MapStateDescriptor<UK,UV>

java.lang.Object

org.apache.flink.runtime.state.v2.StateDescriptor<UV>

org.apache.flink.runtime.state.v2.MapStateDescriptor<UK,UV>

Type Parameters:

UK - The type of the user key for this map state.

UV - The type of the values that the map state can hold.

All Implemented Interfaces:

Serializable

public class MapStateDescriptor<UK,UV>
extends StateDescriptor<UV>

StateDescriptor for MapState. This can be used to create partitioned map state internally.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.runtime.state.v2.StateDescriptor

StateDescriptor.Type

Constructor Summary

Constructors

Constructor	Description
MapStateDescriptor(String stateId, org.apache.flink.api.common.typeinfo.TypeInformation<UK> userKeyTypeInfo, org.apache.flink.api.common.typeinfo.TypeInformation<UV> userValueTypeInfo)	Creates a new MapStateDescriptor with the given stateId and type.
MapStateDescriptor(String stateId, org.apache.flink.api.common.typeinfo.TypeInformation<UK> userKeyTypeInfo, org.apache.flink.api.common.typeinfo.TypeInformation<UV> userValueTypeInfo, org.apache.flink.api.common.serialization.SerializerConfig serializerConfig)	Creates a new MapStateDescriptor with the given stateId and type.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
StateDescriptor.Type	getType()	Return the specific Type of described state.
org.apache.flink.api.common.typeutils.TypeSerializer<UK>	getUserKeySerializer()

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

enableTimeToLive, getSerializer, getStateId, getTtlConfig, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

MapStateDescriptor

public MapStateDescriptor(String stateId,
                          org.apache.flink.api.common.typeinfo.TypeInformation<UK> userKeyTypeInfo,
                          org.apache.flink.api.common.typeinfo.TypeInformation<UV> userValueTypeInfo)

Creates a new MapStateDescriptor with the given stateId and type.

Parameters:

stateId - The (unique) stateId for the state.

userKeyTypeInfo - The type of the user keys in the state.

userValueTypeInfo - The type of the values in the state.

MapStateDescriptor

public MapStateDescriptor(String stateId,
                          org.apache.flink.api.common.typeinfo.TypeInformation<UK> userKeyTypeInfo,
                          org.apache.flink.api.common.typeinfo.TypeInformation<UV> userValueTypeInfo,
                          org.apache.flink.api.common.serialization.SerializerConfig serializerConfig)

Creates a new MapStateDescriptor with the given stateId and type.

Parameters:

stateId - The (unique) stateId for the state.

userKeyTypeInfo - The type of the user keys in the state.

userValueTypeInfo - The type of the values in the state.

serializerConfig - The serializer related config used to generate TypeSerializer.

Method Detail

getUserKeySerializer

@Nonnull
public org.apache.flink.api.common.typeutils.TypeSerializer<UK> getUserKeySerializer()

getType

public StateDescriptor.Type getType()

Description copied from class: StateDescriptor

Return the specific Type of described state.

Specified by:

getType in class StateDescriptor<UV>

equals

public final boolean equals(Object o)

Overrides:

equals in class StateDescriptor<UV>