org.apache.flink.contrib.streaming.state.snapshot

Class RocksDBSnapshotStrategyBase.RocksDBSnapshotOperation

java.lang.Object

org.apache.flink.contrib.streaming.state.snapshot.RocksDBSnapshotStrategyBase.RocksDBSnapshotOperation

All Implemented Interfaces:

org.apache.flink.runtime.state.SnapshotStrategy.SnapshotResultSupplier<org.apache.flink.runtime.state.KeyedStateHandle>

Enclosing class:

RocksDBSnapshotStrategyBase<K,R extends org.apache.flink.runtime.state.SnapshotResources>

protected abstract class RocksDBSnapshotStrategyBase.RocksDBSnapshotOperation
extends Object
implements org.apache.flink.runtime.state.SnapshotStrategy.SnapshotResultSupplier<org.apache.flink.runtime.state.KeyedStateHandle>

Common operation in native rocksdb snapshot result supplier.

Field Summary

Fields

Modifier and Type	Field and Description
protected long	checkpointId Id for the current checkpoint.
protected org.apache.flink.runtime.state.CheckpointStreamFactory	checkpointStreamFactory Stream factory that creates the output streams to DFS.
protected org.apache.flink.runtime.state.SnapshotDirectory	localBackupDirectory Local directory for the RocksDB native backup.
protected List<org.apache.flink.runtime.state.metainfo.StateMetaInfoSnapshot>	stateMetaInfoSnapshots The state meta data.
protected org.apache.flink.core.fs.CloseableRegistry	tmpResourcesRegistry

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	RocksDBSnapshotOperation(long checkpointId, org.apache.flink.runtime.state.CheckpointStreamFactory checkpointStreamFactory, org.apache.flink.runtime.state.SnapshotDirectory localBackupDirectory, List<org.apache.flink.runtime.state.metainfo.StateMetaInfoSnapshot> stateMetaInfoSnapshots)

Method Summary

Modifier and Type	Method and Description
protected Optional<org.apache.flink.runtime.state.KeyedStateHandle>	getLocalSnapshot(org.apache.flink.runtime.state.StreamStateHandle localStreamStateHandle, List<org.apache.flink.runtime.state.IncrementalKeyedStateHandle.HandleAndLocalPath> sharedState)

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.SnapshotStrategy.SnapshotResultSupplier

get

Field Detail

checkpointId

protected final long checkpointId

Id for the current checkpoint.

checkpointStreamFactory

@Nonnull
protected final org.apache.flink.runtime.state.CheckpointStreamFactory checkpointStreamFactory

Stream factory that creates the output streams to DFS.

stateMetaInfoSnapshots

@Nonnull
protected final List<org.apache.flink.runtime.state.metainfo.StateMetaInfoSnapshot> stateMetaInfoSnapshots

The state meta data.

localBackupDirectory

@Nonnull
protected final org.apache.flink.runtime.state.SnapshotDirectory localBackupDirectory

Local directory for the RocksDB native backup.

tmpResourcesRegistry

@Nonnull
protected final org.apache.flink.core.fs.CloseableRegistry tmpResourcesRegistry

Constructor Detail

RocksDBSnapshotOperation

protected RocksDBSnapshotOperation(long checkpointId,
                                   @Nonnull
                                   org.apache.flink.runtime.state.CheckpointStreamFactory checkpointStreamFactory,
                                   @Nonnull
                                   org.apache.flink.runtime.state.SnapshotDirectory localBackupDirectory,
                                   @Nonnull
                                   List<org.apache.flink.runtime.state.metainfo.StateMetaInfoSnapshot> stateMetaInfoSnapshots)

Method Detail

getLocalSnapshot

protected Optional<org.apache.flink.runtime.state.KeyedStateHandle> getLocalSnapshot(@Nullable
                                                                                     org.apache.flink.runtime.state.StreamStateHandle localStreamStateHandle,
                                                                                     List<org.apache.flink.runtime.state.IncrementalKeyedStateHandle.HandleAndLocalPath> sharedState)
                                                                              throws IOException

Throws:

IOException