org.hibernate.cache

Class HashtableCache

java.lang.Object

org.hibernate.cache.HashtableCache

All Implemented Interfaces:

Cache

public class HashtableCache
extends java.lang.Object
implements Cache

A lightweight implementation of the Cache interface

Author:

Gavin King

Constructor Summary

Constructors

Constructor and Description
HashtableCache(java.lang.String regionName)

Method Summary

Methods

Modifier and Type	Method and Description
void	clear() Clear the cache
void	destroy() Clean up
java.lang.Object	get(java.lang.Object key) Get an item from the cache, nontransactionally
long	getElementCountInMemory() The count of entries currently contained in the regions in-memory store.
long	getElementCountOnDisk() The count of entries currently contained in the regions disk store.
java.lang.String	getRegionName() Get the name of the cache region
long	getSizeInMemory() The number of bytes is this cache region currently consuming in memory.
int	getTimeout() Get a reasonable "lock timeout"
void	lock(java.lang.Object key) If this is a clustered cache, lock the item
long	nextTimestamp() Generate a timestamp
void	put(java.lang.Object key, java.lang.Object value) Add an item to the cache, nontransactionally, with failfast semantics
java.lang.Object	read(java.lang.Object key) Get an item from the cache
void	remove(java.lang.Object key) Remove an item from the cache
java.util.Map	toMap() optional operation
java.lang.String	toString()
void	unlock(java.lang.Object key) If this is a clustered cache, unlock the item
void	update(java.lang.Object key, java.lang.Object value) Add an item to the cache

Methods inherited from class java.lang.Object

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

Constructor Detail

HashtableCache

public HashtableCache(java.lang.String regionName)

Method Detail

getRegionName

public java.lang.String getRegionName()

Description copied from interface: Cache

Get the name of the cache region

Specified by:

getRegionName in interface Cache

read

public java.lang.Object read(java.lang.Object key)
                      throws CacheException

Description copied from interface: Cache

Get an item from the cache

Specified by:

read in interface Cache

Returns:

the cached object or null

Throws:

CacheException

get

public java.lang.Object get(java.lang.Object key)
                     throws CacheException

Description copied from interface: Cache

Get an item from the cache, nontransactionally

Specified by:

get in interface Cache

Returns:

the cached object or null

Throws:

CacheException

update

public void update(java.lang.Object key,
          java.lang.Object value)
            throws CacheException

Description copied from interface: Cache

Add an item to the cache

Specified by:

update in interface Cache

Throws:

CacheException

put

public void put(java.lang.Object key,
       java.lang.Object value)
         throws CacheException

Description copied from interface: Cache

Add an item to the cache, nontransactionally, with failfast semantics

Specified by:

put in interface Cache

Throws:

CacheException

remove

public void remove(java.lang.Object key)
            throws CacheException

Description copied from interface: Cache

Remove an item from the cache

Specified by:

remove in interface Cache

Throws:

CacheException

clear

public void clear()
           throws CacheException

Description copied from interface: Cache

Clear the cache

Specified by:

clear in interface Cache

Throws:

CacheException

destroy

public void destroy()
             throws CacheException

Description copied from interface: Cache

Clean up

Specified by:

destroy in interface Cache

Throws:

CacheException

lock

public void lock(java.lang.Object key)
          throws CacheException

Description copied from interface: Cache

If this is a clustered cache, lock the item

Specified by:

lock in interface Cache

Throws:

CacheException

unlock

public void unlock(java.lang.Object key)
            throws CacheException

Description copied from interface: Cache

If this is a clustered cache, unlock the item

Specified by:

unlock in interface Cache

Throws:

CacheException

nextTimestamp

public long nextTimestamp()

Description copied from interface: Cache

Generate a timestamp

Specified by:

nextTimestamp in interface Cache

getTimeout

public int getTimeout()

Description copied from interface: Cache

Get a reasonable "lock timeout"

Specified by:

getTimeout in interface Cache

getSizeInMemory

public long getSizeInMemory()

Description copied from interface: Cache

The number of bytes is this cache region currently consuming in memory.

Specified by:

getSizeInMemory in interface Cache

Returns:

The number of bytes consumed by this region; -1 if unknown or unsupported.

getElementCountInMemory

public long getElementCountInMemory()

Description copied from interface: Cache

The count of entries currently contained in the regions in-memory store.

Specified by:

getElementCountInMemory in interface Cache

Returns:

The count of entries in memory; -1 if unknown or unsupported.

getElementCountOnDisk

public long getElementCountOnDisk()

Description copied from interface: Cache

The count of entries currently contained in the regions disk store.

Specified by:

getElementCountOnDisk in interface Cache

Returns:

The count of entries on disk; -1 if unknown or unsupported.

toMap

public java.util.Map toMap()

Description copied from interface: Cache

optional operation

Specified by:

toMap in interface Cache

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object