alluxio.client.file.cache.store

Class MemoryPageStoreDir

java.lang.Object

alluxio.client.file.cache.store.MemoryPageStoreDir

All Implemented Interfaces:

CacheStatus, PageStoreDir

public class MemoryPageStoreDir
extends Object

Represents the dir and file level metadata of the MemPageStore.

Field Summary

Fields inherited from interface alluxio.client.file.cache.store.PageStoreDir

LOG

Constructor Summary

Constructors

Constructor and Description
MemoryPageStoreDir(PageStoreOptions pageStoreOptions, MemoryPageStore pageStore, CacheEvictor cacheEvictor) Constructor of MemPageStoreDir.

Method Summary

Modifier and Type	Method and Description
void	abort(String fileId) Abort a temporary file.
void	close() Close the page store dir.
void	commit(String fileId, String newFileId) Commit a temporary file with a new file ID.
long	deletePage(PageInfo pageInfo)
void	deleteTempPage(PageInfo pageInfo)
long	getCachedBytes()
long	getCapacityBytes()
CacheEvictor	getEvictor()
PageStore	getPageStore()
Path	getRootPath()
Optional<CacheUsage>	getUsage() Gets cache usage.
boolean	hasFile(String fileId)
boolean	hasTempFile(String fileId)
void	putPage(PageInfo pageInfo)
boolean	putTempFile(String fileId)
void	putTempPage(PageInfo pageInfo)
long	release(long bytes) Release the pre-reserved space.
boolean	reserve(long bytes)
void	reset() Reset page store.
void	scanPages(java.util.function.Consumer<Optional<PageInfo>> pageInfoConsumer) Scan the pages under this dir.

Methods inherited from class java.lang.Object

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

Methods inherited from interface alluxio.client.file.cache.store.PageStoreDir

clear, commit, createPageStoreDir, createPageStoreDirs, getFileBucket

Constructor Detail

MemoryPageStoreDir

public MemoryPageStoreDir(PageStoreOptions pageStoreOptions,
                          MemoryPageStore pageStore,
                          CacheEvictor cacheEvictor)

Constructor of MemPageStoreDir.

Parameters:

pageStoreOptions - page store options

pageStore - the PageStore instance

cacheEvictor - the evictor

Method Detail

getPageStore

public PageStore getPageStore()

Returns:

pageStore

reset

public void reset()

Description copied from interface: PageStoreDir

Reset page store.

scanPages

public void scanPages(java.util.function.Consumer<Optional<PageInfo>> pageInfoConsumer)

Description copied from interface: PageStoreDir

Scan the pages under this dir.

getUsage

public Optional<CacheUsage> getUsage()

Description copied from interface: CacheStatus

Gets cache usage.

Returns:

cache usage, or none if reporting usage info is not supported

getRootPath

public Path getRootPath()

Specified by:

getRootPath in interface PageStoreDir

Returns:

root path

getCapacityBytes

public long getCapacityBytes()

Specified by:

getCapacityBytes in interface PageStoreDir

Returns:

capacity

getCachedBytes

public long getCachedBytes()

Specified by:

getCachedBytes in interface PageStoreDir

Returns:

cached bytes in this directory

putPage

public void putPage(PageInfo pageInfo)

Specified by:

putPage in interface PageStoreDir

putTempPage

public void putTempPage(PageInfo pageInfo)

Specified by:

putTempPage in interface PageStoreDir

deletePage

public long deletePage(PageInfo pageInfo)

Specified by:

deletePage in interface PageStoreDir

Returns:

the bytes used after release

deleteTempPage

public void deleteTempPage(PageInfo pageInfo)

Specified by:

deleteTempPage in interface PageStoreDir

putTempFile

public boolean putTempFile(String fileId)

Specified by:

putTempFile in interface PageStoreDir

Parameters:

fileId - file id

Returns:

if the temp file is added successfully

reserve

public boolean reserve(long bytes)

Specified by:

reserve in interface PageStoreDir

Returns:

if the bytes requested could be reserved

release

public long release(long bytes)

Description copied from interface: PageStoreDir

Release the pre-reserved space.

Specified by:

release in interface PageStoreDir

Returns:

the bytes used after the release

hasFile

public boolean hasFile(String fileId)

Specified by:

hasFile in interface PageStoreDir

Returns:

true if the file is contained, false otherwise

hasTempFile

public boolean hasTempFile(String fileId)

Specified by:

hasTempFile in interface PageStoreDir

Returns:

true if the temp file is contained, false otherwise

getEvictor

public CacheEvictor getEvictor()

Specified by:

getEvictor in interface PageStoreDir

Returns:

the evictor of this dir

close

public void close()

Description copied from interface: PageStoreDir

Close the page store dir.

Specified by:

close in interface PageStoreDir

commit

public void commit(String fileId,
                   String newFileId)
            throws IOException

Description copied from interface: PageStoreDir

Commit a temporary file with a new file ID.

Specified by:

commit in interface PageStoreDir

Throws:

IOException

abort

public void abort(String fileId)
           throws IOException

Description copied from interface: PageStoreDir

Abort a temporary file.

Specified by:

abort in interface PageStoreDir

Throws:

IOException