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HashtableCache (Hibernate API Documentation) - Hibernate 3.2.3 正式版 API 英文文档

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org.hibernate.cache
Class HashtableCache

java.lang.Object
  org.hibernate.cache.HashtableCache

All Implemented Interfaces:: Cache

public class HashtableCache
extends Object
implements Cache

A lightweight implementation of the Cache interface

Author:: Gavin King

Constructor Summary

HashtableCache(String regionName)


Method Summary

void clear()
          Clear the cache

void destroy()
          Clean up

Object get(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.

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(Object key)
          If this is a clustered cache, lock the item

long nextTimestamp()
          Generate a timestamp

void put(Object key, Object value)
          Add an item to the cache, nontransactionally, with failfast semantics

Object read(Object key)
          Get an item from the cache

void remove(Object key)
          Remove an item from the cache

Map toMap()
          optional operation

String toString()


void unlock(Object key)
          If this is a clustered cache, unlock the item

void update(Object key, 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(String regionName)

Method Detail

getRegionName

public String getRegionName()

Description copied from interface: Cache

Get the name of the cache region

Specified by:: getRegionName in interface Cache

read

public Object read(Object key)
            throws CacheException

Description copied from interface: Cache

Get an item from the cache

Specified by:: read in interface Cache

Parameters:: key -
Returns:: the cached object or null
Throws:: CacheException

get

public Object get(Object key)
           throws CacheException

Description copied from interface: Cache

Get an item from the cache, nontransactionally

Specified by:: get in interface Cache

Parameters:: key -
Returns:: the cached object or null
Throws:: CacheException

update

public void update(Object key,
                   Object value)
            throws CacheException

Description copied from interface: Cache

Add an item to the cache

Specified by:: update in interface Cache

Parameters:: key -; value -
Throws:: CacheException

put

public void put(Object key,
                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

Parameters:: key -; value -
Throws:: CacheException

remove

public void remove(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(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(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 Map toMap()

Description copied from interface: Cache

optional operation

Specified by:: toMap in interface Cache

toString

public String toString()

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