org.apache.flink.runtime.state.metainfo

Class StateMetaInfoSnapshotReadersWriters

java.lang.Object

org.apache.flink.runtime.state.metainfo.StateMetaInfoSnapshotReadersWriters

public class StateMetaInfoSnapshotReadersWriters
extends Object

Static factory that gives out the write and readers for different versions of StateMetaInfoSnapshot.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	StateMetaInfoSnapshotReadersWriters.StateTypeHint Enum for backwards compatibility.

Field Summary

Fields

Modifier and Type	Field and Description
static int	CURRENT_STATE_META_INFO_SNAPSHOT_VERSION Current version for the serialization format of StateMetaInfoSnapshotReadersWriters.

Method Summary

Modifier and Type	Method and Description
static StateMetaInfoReader	getReader(int readVersion, StateMetaInfoSnapshotReadersWriters.StateTypeHint stateTypeHint) Returns a reader for StateMetaInfoSnapshot with the requested state type and version number.
static StateMetaInfoWriter	getWriter() Returns the writer for StateMetaInfoSnapshot.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

CURRENT_STATE_META_INFO_SNAPSHOT_VERSION

public static final int CURRENT_STATE_META_INFO_SNAPSHOT_VERSION

Current version for the serialization format of StateMetaInfoSnapshotReadersWriters. - v6: since Flink 1.7.x

See Also:

Constant Field Values

Method Detail

getWriter

@Nonnull
public static StateMetaInfoWriter getWriter()

Returns the writer for StateMetaInfoSnapshot.

getReader

@Nonnull
public static StateMetaInfoReader getReader(int readVersion,
                                                     @Nonnull
                                                     StateMetaInfoSnapshotReadersWriters.StateTypeHint stateTypeHint)

Returns a reader for StateMetaInfoSnapshot with the requested state type and version number.

Parameters:

readVersion - the format version to read.

stateTypeHint - a hint about the expected type to read.

Returns:

the requested reader.