alluxio.worker.dora

Interface DoraMetaStore

All Known Implementing Classes:

RocksDBDoraMetaStore

public interface DoraMetaStore

The Dora metadata Store.

Method Summary

Modifier and Type	Method and Description
void	clear() Removes all metadata from the dora meta store.
void	close() Closes the block store and releases all resources.
Optional<DoraMeta.FileStatus>	getDoraMeta(String path) queries dora metadata from the dora meta store.
void	putDoraMeta(String path, DoraMeta.FileStatus meta) Adds dora metadata to the dora meta store.
void	removeDoraMeta(String path) Removes a dora meta, or does nothing if the dora meta does not exist.
Optional<Long>	size()

Method Detail

getDoraMeta

Optional<DoraMeta.FileStatus> getDoraMeta(String path)

queries dora metadata from the dora meta store.

Parameters:

path - the full path of this file

Returns:

if found, the meta is returned

putDoraMeta

void putDoraMeta(String path,
                 DoraMeta.FileStatus meta)

Adds dora metadata to the dora meta store. If the dora meta already exists, its metadata will be updated to the given metadata.

Parameters:

path - the full path of this file

meta - the block metadata

removeDoraMeta

void removeDoraMeta(String path)

Removes a dora meta, or does nothing if the dora meta does not exist.

Parameters:

path - the full path of the file

clear

void clear()

Removes all metadata from the dora meta store.

close

void close()

Closes the block store and releases all resources.

size

Optional<Long> size()

Returns:

number of metadata records currently stored in this store