alluxio.master.journal.checkpoint

Interface Checkpointed

All Known Subinterfaces:

BlockMaster, DelegatingJournaled, FileSystemMaster, InodeStore, Journaled, Master, MetaMaster, MetricsMaster, NoopJournaled, TableMaster

All Known Implementing Classes:

AbstractMaster, ActiveSyncManager, AlluxioCatalog, CachingInodeStore, CheckpointedIdHashSet, CoreMaster, Database, DefaultBlockMaster, DefaultFileSystemMaster, DefaultMetaMaster, DefaultMetaMaster.State, DefaultMetricsMaster, DefaultTableMaster, HeapInodeStore, InodeCounter, InodeDirectoryIdGenerator, InodeTree, InodeTreePersistentState, JobMaster, JournaledGroup, MasterUfsManager, MountTable, MountTable.State, NoopMaster, PathProperties, PathProperties.State, PinnedInodeFileIds, ReplicationLimitedFileIds, RocksInodeStore, ToBePersistedFileIds, TransformManager, TtlBucketList

public interface Checkpointed

Base class for Alluxio classes which can be written to and read from metadata checkpoints.

Method Summary

Modifier and Type	Method and Description
CheckpointName	getCheckpointName()
void	restoreFromCheckpoint(CheckpointInputStream input) Restores state from a checkpoint.
void	writeToCheckpoint(OutputStream output) Writes a checkpoint of all state to the given output stream.

Method Detail

getCheckpointName

CheckpointName getCheckpointName()

Returns:

a name for this checkpointed class

writeToCheckpoint

void writeToCheckpoint(OutputStream output)
                throws IOException,
                       InterruptedException

Writes a checkpoint of all state to the given output stream. Implementations should make an effort to throw InterruptedException if they get interrupted while running.

Parameters:

output - the output stream to write to

Throws:

IOException

InterruptedException

restoreFromCheckpoint

void restoreFromCheckpoint(CheckpointInputStream input)
                    throws IOException

Restores state from a checkpoint.

Parameters:

input - an input stream with checkpoint data

Throws:

IOException