org.teiid.common.buffer.impl

Class MemoryStorageManager

java.lang.Object

org.teiid.common.buffer.impl.MemoryStorageManager

All Implemented Interfaces:

Cache<Long>, StorageManager

public class MemoryStorageManager
extends Object
implements Cache<Long>

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_FILE_SIZE

Constructor Summary

Constructors

Constructor and Description
MemoryStorageManager()

Method Summary

Modifier and Type	Method and Description
boolean	add(CacheEntry entry, Serializer<?> s) Adds an entry to the cache.
boolean	addToCacheGroup(Long gid, Long oid) Must be called prior to adding an entry
void	createCacheGroup(Long gid) Must be called prior to adding any group entries
FileStore	createFileStore(String name)
CacheEntry	get(Long lock, Long oid, WeakReference<? extends Serializer<?>> ref) Get method, must be called using the object obtained in the lockForLoad method
int	getCreated()
long	getMaxStorageSpace()
long	getMemoryBufferSpace()
int	getRemoved()
void	initialize()
Long	lockForLoad(Long oid, Serializer<?> serializer) Lock the object for load and return an identifier/lock that can be used to retrieve the object.
Integer	remove(Long gid, Long id) Remove an entry from the cache, return the sizeEstimate if the entry existed
Collection<Long>	removeCacheGroup(Long gid) Remove an entire cache group TODO: this should use a callback on the buffermangaer to remove memory entries without materializing all group keys
void	shutdown()
void	unlockForLoad(Long o) Must be called after lockForLoad

Methods inherited from class java.lang.Object

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

Field Detail

MAX_FILE_SIZE

public static final int MAX_FILE_SIZE

See Also:

Constant Field Values

Constructor Detail

MemoryStorageManager

public MemoryStorageManager()

Method Detail

initialize

public void initialize()

Specified by:

initialize in interface StorageManager

createFileStore

public FileStore createFileStore(String name)

Specified by:

createFileStore in interface StorageManager

getCreated

public int getCreated()

getRemoved

public int getRemoved()

add

public boolean add(CacheEntry entry,
                   Serializer<?> s)

Description copied from interface: Cache

Adds an entry to the cache.

Specified by:

add in interface Cache<Long>

addToCacheGroup

public boolean addToCacheGroup(Long gid,
                               Long oid)

Description copied from interface: Cache

Must be called prior to adding an entry

Specified by:

addToCacheGroup in interface Cache<Long>

Returns:

if the add was successful

createCacheGroup

public void createCacheGroup(Long gid)

Description copied from interface: Cache

Must be called prior to adding any group entries

Specified by:

createCacheGroup in interface Cache<Long>

lockForLoad

public Long lockForLoad(Long oid,
                        Serializer<?> serializer)

Description copied from interface: Cache

Lock the object for load and return an identifier/lock that can be used to retrieve the object.

Specified by:

lockForLoad in interface Cache<Long>

Returns:

the identifier, may be null

unlockForLoad

public void unlockForLoad(Long o)

Description copied from interface: Cache

Must be called after lockForLoad

Specified by:

unlockForLoad in interface Cache<Long>

get

public CacheEntry get(Long lock,
                      Long oid,
                      WeakReference<? extends Serializer<?>> ref)
               throws TeiidComponentException

Description copied from interface: Cache

Get method, must be called using the object obtained in the lockForLoad method

Specified by:

get in interface Cache<Long>

Returns:

Throws:

TeiidComponentException

remove

public Integer remove(Long gid,
                      Long id)

Description copied from interface: Cache

Remove an entry from the cache, return the sizeEstimate if the entry existed

Specified by:

remove in interface Cache<Long>

removeCacheGroup

public Collection<Long> removeCacheGroup(Long gid)

Description copied from interface: Cache

Remove an entire cache group TODO: this should use a callback on the buffermangaer to remove memory entries without materializing all group keys

Specified by:

removeCacheGroup in interface Cache<Long>

Returns:

shutdown

public void shutdown()

Specified by:

shutdown in interface Cache<Long>

getMaxStorageSpace

public long getMaxStorageSpace()

Specified by:

getMaxStorageSpace in interface StorageManager

getMemoryBufferSpace

public long getMemoryBufferSpace()

Specified by:

getMemoryBufferSpace in interface Cache<Long>