H2 Database Engine 2.3.232 · org.h2.util.Cache · APIdia, the JavaDoc alternative

Method Summary

Modifier and Type	Method and Description
public void	clear() Clear the cache.
public CacheObject	Returns: the element or null find(int the unique key of the element pos) Get an element from the cache if it is available.
public CacheObject	Returns: the element or null get(int the unique key of the element pos) Get an element in the cache if it is available.
public ArrayList<CacheObject>	Returns: the list of objects getAllChanged() Get all objects in the cache that have been changed.
public int	Returns: the maximum size in KB getMaxMemory() Get the maximum memory to be used.
public int	Returns: the current size in KB getMemory() Get the used size in KB.
public void	put(CacheObject the object r) Add an element to the cache.
public boolean	Returns: true if the key was in the cache remove(int the unique key of the element pos) Remove an object from the cache.
public void	setMaxMemory(int the maximum size in KB size) Set the maximum memory to be used by this cache.
public CacheObject	Returns: the element update(int the unique key of the element pos, CacheObject the element record) Update an element in the cache.

Method Detail

clear	back to summary
public void clear() Clear the cache.

find	back to summary
public CacheObject find(int pos) Get an element from the cache if it is available. This will not move the item to the front of the list. Parameters pos:int the unique key of the element Returns:CacheObject the element or null

find

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public CacheObject find(int pos)

Get an element from the cache if it is available. This will not move the item to the front of the list.

Parameters

pos:int: the unique key of the element

Returns:CacheObject

the element or null

get	back to summary
public CacheObject get(int pos) Get an element in the cache if it is available. This will move the item to the front of the list. Parameters pos:int the unique key of the element Returns:CacheObject the element or null

get

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public CacheObject get(int pos)

Get an element in the cache if it is available. This will move the item to the front of the list.

Parameters

pos:int: the unique key of the element

Returns:CacheObject

the element or null

getAllChanged	back to summary
public ArrayList<CacheObject> getAllChanged() Get all objects in the cache that have been changed. Returns:ArrayList<CacheObject> the list of objects

getAllChanged

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public ArrayList<CacheObject> getAllChanged()

Get all objects in the cache that have been changed.

Returns:ArrayList<CacheObject>: the list of objects

getMaxMemory	back to summary
public int getMaxMemory() Get the maximum memory to be used. Returns:int the maximum size in KB

getMaxMemory

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public int getMaxMemory()

Get the maximum memory to be used.

Returns:int: the maximum size in KB

getMemory	back to summary
public int getMemory() Get the used size in KB. Returns:int the current size in KB

getMemory

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public int getMemory()

Get the used size in KB.

Returns:int: the current size in KB

put	back to summary
public void put(CacheObject r) Add an element to the cache. Other items may fall out of the cache because of this. It is not allowed to add the same record twice. Parameters r:CacheObject the object

put

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public void put(CacheObject r)

Add an element to the cache. Other items may fall out of the cache because of this. It is not allowed to add the same record twice.

Parameters

r:CacheObject: the object

remove	back to summary
public boolean remove(int pos) Remove an object from the cache. Parameters pos:int the unique key of the element Returns:boolean true if the key was in the cache

remove

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public boolean remove(int pos)

Remove an object from the cache.

Parameters

pos:int: the unique key of the element

Returns:boolean

true if the key was in the cache

setMaxMemory	back to summary
public void setMaxMemory(int size) Set the maximum memory to be used by this cache. Parameters size:int the maximum size in KB

setMaxMemory

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public void setMaxMemory(int size)

Set the maximum memory to be used by this cache.

Parameters

size:int: the maximum size in KB

update	back to summary
public CacheObject update(int pos, CacheObject record) Update an element in the cache. This will move the item to the front of the list. Parameters pos:int the unique key of the element record:CacheObject the element Returns:CacheObject the element

update

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public CacheObject update(int pos, CacheObject record)

Update an element in the cache. This will move the item to the front of the list.

Parameters

pos:int: the unique key of the element
record:CacheObject: the element

Returns:CacheObject

the element

public Interface Cache

Method Summary

Method Detail