org.apache.flink.runtime.state

Class RegisteredKeyedBackendStateMetaInfo<N,S>

java.lang.Object

org.apache.flink.runtime.state.RegisteredKeyedBackendStateMetaInfo<N,S>

Type Parameters:

N - Type of namespace

S - Type of state value

public class RegisteredKeyedBackendStateMetaInfo<N,S>
extends Object

Compound meta information for a registered state in a keyed state backend. This combines all serializers and the state name.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	RegisteredKeyedBackendStateMetaInfo.Snapshot<N,S> A consistent snapshot of a RegisteredKeyedBackendStateMetaInfo.

Constructor Summary

Constructors

Constructor and Description
RegisteredKeyedBackendStateMetaInfo(org.apache.flink.api.common.state.StateDescriptor.Type stateType, String name, org.apache.flink.api.common.typeutils.TypeSerializer<N> namespaceSerializer, org.apache.flink.api.common.typeutils.TypeSerializer<S> stateSerializer)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
String	getName()
org.apache.flink.api.common.typeutils.TypeSerializer<N>	getNamespaceSerializer()
org.apache.flink.api.common.typeutils.TypeSerializer<S>	getStateSerializer()
org.apache.flink.api.common.state.StateDescriptor.Type	getStateType()
int	hashCode()
static <N,S> RegisteredKeyedBackendStateMetaInfo<N,S>	resolveKvStateCompatibility(RegisteredKeyedBackendStateMetaInfo.Snapshot<N,S> restoredStateMetaInfoSnapshot, org.apache.flink.api.common.typeutils.TypeSerializer<N> newNamespaceSerializer, org.apache.flink.api.common.state.StateDescriptor<?,S> newStateDescriptor) Checks compatibility of a restored k/v state, with the new StateDescriptor provided to it.
RegisteredKeyedBackendStateMetaInfo.Snapshot<N,S>	snapshot()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

RegisteredKeyedBackendStateMetaInfo

public RegisteredKeyedBackendStateMetaInfo(org.apache.flink.api.common.state.StateDescriptor.Type stateType,
                                           String name,
                                           org.apache.flink.api.common.typeutils.TypeSerializer<N> namespaceSerializer,
                                           org.apache.flink.api.common.typeutils.TypeSerializer<S> stateSerializer)

Method Detail

getStateType

public org.apache.flink.api.common.state.StateDescriptor.Type getStateType()

getName

public String getName()

getNamespaceSerializer

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

getStateSerializer

public org.apache.flink.api.common.typeutils.TypeSerializer<S> getStateSerializer()

snapshot

public RegisteredKeyedBackendStateMetaInfo.Snapshot<N,S> snapshot()

equals

public boolean equals(Object o)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

resolveKvStateCompatibility

public static <N,S> RegisteredKeyedBackendStateMetaInfo<N,S> resolveKvStateCompatibility(RegisteredKeyedBackendStateMetaInfo.Snapshot<N,S> restoredStateMetaInfoSnapshot,
                                                                                         org.apache.flink.api.common.typeutils.TypeSerializer<N> newNamespaceSerializer,
                                                                                         org.apache.flink.api.common.state.StateDescriptor<?,S> newStateDescriptor)
                                                                                  throws org.apache.flink.util.StateMigrationException

Checks compatibility of a restored k/v state, with the new StateDescriptor provided to it. This checks that the descriptor specifies identical names and state types, as well as serializers that are compatible for the restored k/v state bytes.

Throws:

org.apache.flink.util.StateMigrationException