Uses of Interface
org.apache.flink.runtime.state.StateObject

Packages that use StateObject

Package	Description
org.apache.flink.runtime.checkpoint
org.apache.flink.runtime.state
org.apache.flink.runtime.state.changelog
org.apache.flink.runtime.state.changelog.inmemory
org.apache.flink.runtime.state.filemerging
org.apache.flink.runtime.state.filesystem
org.apache.flink.runtime.state.memory
org.apache.flink.runtime.util
org.apache.flink.streaming.api.operators

Uses of StateObject in org.apache.flink.runtime.checkpoint

Classes in org.apache.flink.runtime.checkpoint with type parameters of type StateObject

Modifier and Type	Class	Description
class	StateObjectCollection<T extends StateObject>	This class represents a generic collection for StateObjects.

Classes in org.apache.flink.runtime.checkpoint that implement StateObject

Modifier and Type	Class	Description
class	FinishedOperatorSubtaskState	A specialized OperatorSubtaskState representing the subtask is finished.
class	FullyFinishedOperatorState	A special operator state implementation representing the operators whose instances are all finished.
class	OperatorState	Simple container class which contains the raw/managed operator state and key-group state handles from all subtasks of an operator and therefore represents the complete state of a logical operator.
class	OperatorSubtaskState	This class encapsulates the state for one parallel instance of an operator.
class	StateObjectCollection<T extends StateObject>	This class represents a generic collection for StateObjects.
class	SubtaskState	Deprecated. Internal class for savepoint backwards compatibility.
class	TaskState	Deprecated. Internal class for savepoint backwards compatibility.
class	TaskStateSnapshot	This class encapsulates state handles to the snapshots of all operator instances executed within one task.

Methods in org.apache.flink.runtime.checkpoint with type parameters of type StateObject

Modifier and Type	Method	Description
static <T extends StateObject> StateObjectCollection<T>	StateObjectCollection.empty()
static <T extends StateObject> StateObjectCollection<T>	StateObjectCollection.emptyIfNull(StateObjectCollection<T> collection)
static <T extends StateObject> void	StateAssignmentOperation.reDistributePartitionableStates(Map<OperatorID,OperatorState> oldOperatorStates, int newParallelism, Function<OperatorSubtaskState,StateObjectCollection<T>> extractHandle, OperatorStateRepartitioner<T> stateRepartitioner, Map<OperatorInstanceID,List<T>> result)
static <T extends StateObject> StateObjectCollection<T>	StateObjectCollection.singleton(T stateObject)
static <T extends StateObject> StateObjectCollection<T>	StateObjectCollection.singletonOrEmpty(T stateObject)

Methods in org.apache.flink.runtime.checkpoint that return types with arguments of type StateObject

Modifier and Type	Method	Description
List<StateObject>	OperatorState.getDiscardables()
List<StateObject>	OperatorSubtaskState.getDiscardables()

Uses of StateObject in org.apache.flink.runtime.state

Classes in org.apache.flink.runtime.state with type parameters of type StateObject

Modifier and Type	Class	Description
class	ChainedStateHandle<T extends StateObject>	Handle to state handles for the operators in an operator chain.
interface	Snapshotable<S extends StateObject>	Interface for objects that can snapshot its state (state backends currently).
class	SnapshotResult<T extends StateObject>	This class contains the combined results from the snapshot of a state backend: A state object representing the state that will be reported to the Job Manager to acknowledge the checkpoint.
interface	SnapshotStrategy<S extends StateObject,SR extends SnapshotResources>	Interface for different snapshot approaches in state backends.
static interface	SnapshotStrategy.SnapshotResultSupplier<S extends StateObject>	A supplier for a SnapshotResult with an access to a CloseableRegistry for io tasks that need to be closed when cancelling the async part of the checkpoint.
class	SnapshotStrategyRunner<T extends StateObject,SR extends SnapshotResources>	A class to execute a SnapshotStrategy.

Subinterfaces of StateObject in org.apache.flink.runtime.state

Modifier and Type	Interface	Description
interface	CheckpointBoundKeyedStateHandle	KeyedStateHandle that is bound to a specific checkpoint.
interface	CompositeStateHandle	Base of all snapshots that are taken by StateBackends and some other components in tasks.
interface	IncrementalKeyedStateHandle	Common interface to all incremental KeyedStateHandle.
interface	KeyedStateHandle	Base for the handles of the checkpointed states in keyed streams.
interface	OperatorStateHandle	Interface of a state handle for operator state.
interface	RetrievableStateHandle<T extends Serializable>	Handle to state that can be read back again via RetrievableStateHandle.retrieveState().
interface	SavepointKeyedStateHandle	A KeyedStateHandle that points to a savepoint taken in the unified format.
interface	StreamStateHandle	A StateObject that represents state that was written to a stream.

Classes in org.apache.flink.runtime.state that implement StateObject

Modifier and Type	Class	Description
class	AbstractChannelStateHandle<Info>	Abstract channel state handle.
class	AbstractIncrementalStateHandle	Abstract superclass for all IncrementalKeyedStateHandle.
class	ChainedStateHandle<T extends StateObject>	Handle to state handles for the operators in an operator chain.
class	DirectoryStateHandle	This state handle represents a directory.
class	IncrementalLocalKeyedStateHandle	State handle for local copies of IncrementalRemoteKeyedStateHandle.
class	IncrementalRemoteKeyedStateHandle	The handle to states of an incremental snapshot.
class	InputChannelStateHandle	Handle to an InputChannel state.
class	KeyGroupsSavepointStateHandle	A KeyGroupsStateHandle that describes a savepoint in the unified format.
class	KeyGroupsStateHandle	A handle to the partitioned stream operator state after it has been checkpointed.
class	OperatorStreamStateHandle	State handle for partitionable operator state.
class	PlaceholderStreamStateHandle	A placeholder state handle for shared state that will replaced by an original that was created in a previous checkpoint.
class	ResultSubpartitionStateHandle	Handle to a ResultSubpartition state.
class	RetrievableStreamStateHandle<T extends Serializable>	Wrapper around a StreamStateHandle to make the referenced state object retrievable trough a simple get call.
static class	SharedStateRegistryImpl.EmptyDiscardStateObjectForRegister	An object with empty discardState for registering.
class	SnapshotResult<T extends StateObject>	This class contains the combined results from the snapshot of a state backend: A state object representing the state that will be reported to the Job Manager to acknowledge the checkpoint.

Methods in org.apache.flink.runtime.state with type parameters of type StateObject

Modifier and Type	Method	Description
static <T extends StateObject> SnapshotResult<T>	SnapshotResult.empty()
static <T extends StateObject> SnapshotResult<T>	SnapshotResult.of(T jobManagerState)
static <T extends StateObject> SnapshotResult<T>	SnapshotResult.withLocalState(T jobManagerState, T localState)
static <T extends StateObject> ChainedStateHandle<T>	ChainedStateHandle.wrapSingleHandle(T stateHandleToWrap)

Methods in org.apache.flink.runtime.state with parameters of type StateObject

Modifier and Type	Method	Description
static void	StateUtil.discardStateObjectQuietly(StateObject stateObject)
static long	StateUtil.getStateSize(StateObject handle)	Returns the size of a state object.

Method parameters in org.apache.flink.runtime.state with type arguments of type StateObject

Modifier and Type	Method	Description
static void	StateUtil.bestEffortDiscardAllStateObjects(Iterable<? extends StateObject> handlesToDiscard)	Iterates through the passed state handles and calls discardState() on each handle that is not null.
static org.apache.flink.api.java.tuple.Tuple2<Long,Long>	StateUtil.discardStateFuture(Future<? extends StateObject> stateFuture)	Discards the given state future by first trying to cancel it.
static RuntimeException	StateUtil.unexpectedStateHandleException(Class<? extends StateObject> expectedStateHandleClass, Class<? extends StateObject> actualStateHandleClass)	Creates an RuntimeException that signals that an operation did not get the type of StateObject that was expected.

Uses of StateObject in org.apache.flink.runtime.state.changelog

Subinterfaces of StateObject in org.apache.flink.runtime.state.changelog

Modifier and Type	Interface	Description
interface	ChangelogStateBackendHandle	A handle to ChangelogStateBackend state.
interface	ChangelogStateHandle	A handle to saved state changes.

Classes in org.apache.flink.runtime.state.changelog that implement StateObject

Modifier and Type	Class	Description
static class	ChangelogStateBackendHandle.ChangelogStateBackendHandleImpl
class	ChangelogStateBackendLocalHandle	State handle for local copies of ChangelogStateHandleStreamImpl.
class	ChangelogStateHandleStreamImpl	ChangelogStateHandle implementation based on StreamStateHandle.

Uses of StateObject in org.apache.flink.runtime.state.changelog.inmemory

Classes in org.apache.flink.runtime.state.changelog.inmemory that implement StateObject

Modifier and Type	Class	Description
class	InMemoryChangelogStateHandle	In-memory ChangelogStateHandle.

Uses of StateObject in org.apache.flink.runtime.state.filemerging

Classes in org.apache.flink.runtime.state.filemerging that implement StateObject

Modifier and Type	Class	Description
class	DirectoryStreamStateHandle	This state handle represents a directory, usually used to be registered to SharedStateRegistry to track the life cycle of the directory.
class	EmptyFileMergingOperatorStreamStateHandle	An empty FileMergingOperatorStreamStateHandle that is only used as a placeholder to prevent file merging directory from being deleted.
class	EmptySegmentFileStateHandle	An empty SegmentFileStateHandle that is only used as a placeholder.
class	FileMergingOperatorStreamStateHandle	A OperatorStreamStateHandle that works for file merging checkpoints.
class	SegmentFileStateHandle	FileStateHandle for state that was written to a file segment.

Uses of StateObject in org.apache.flink.runtime.state.filesystem

Classes in org.apache.flink.runtime.state.filesystem that implement StateObject

Modifier and Type	Class	Description
class	FileStateHandle	StreamStateHandle for state that was written to a file stream.
class	RelativeFileStateHandle	A StreamStateHandle for state that was written to a file stream.

Uses of StateObject in org.apache.flink.runtime.state.memory

Classes in org.apache.flink.runtime.state.memory that implement StateObject

Modifier and Type	Class	Description
class	ByteStreamStateHandle	A state handle that contains stream state in a byte array.

Uses of StateObject in org.apache.flink.runtime.util

Methods in org.apache.flink.runtime.util with parameters of type StateObject

Modifier and Type	Method	Description
static byte[]	StateHandleStoreUtils.serializeOrDiscard(StateObject stateObject)	Serializes the passed StateObject and discards the state in case of failure.

Uses of StateObject in org.apache.flink.streaming.api.operators

Classes in org.apache.flink.streaming.api.operators with type parameters of type StateObject

Modifier and Type	Class	Description
class	BackendRestorerProcedure<T extends Closeable & org.apache.flink.util.Disposable,S extends StateObject>	This class implements the logic that creates (and potentially restores) a state backend.