public Class ConcurrentFixedCache

Class Inheritance

extends Object
implements Serializable

java.lang.Object
org.eclipse.persistence.internal.helper.ConcurrentFixedCache

All Implemented Interfaces

java.io.Serializable

Imports

java.io.Serializable, java.util.*, java.util.concurrent.*

Provide a concurrent fixed size caching mechanism. This is used for caching EJBQL parsed queries, Update calls, and other places a fixed size cache is needed. The default fixed size is 100.

Field Summary

Modifier and Type	Field and Description
protected Map<K, V>	cache
protected int	maxSize

Constructor Summary

Access	Constructor and Description
public	ConcurrentFixedCache() Create a new concurrent cache, with a fixed size of 100.
public	ConcurrentFixedCache(int maxSize) Create a new concurrent cache, with the max size.

Method Summary

Modifier and Type	Method and Description
public void	clear()
public Object	get(Object key) Return the pre-parsed query that represents the EJBQL string.
public Map<K, V>	getCache() Return the cache.
public int	getMaxSize() Return the fixed size of the parse cache.
public void	put(Object key, Object value) Add the value to the cache.
public void	remove(Object key) Remove from cache.
public void	setMaxSize(int maxSize) Set the fixed size of the parse cache.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

cache	back to summary
protected Map<K, V> cache

maxSize	back to summary
protected int maxSize

Constructor Detail

ConcurrentFixedCache	back to summary
public ConcurrentFixedCache() Create a new concurrent cache, with a fixed size of 100.

ConcurrentFixedCache	back to summary
public ConcurrentFixedCache(int maxSize) Create a new concurrent cache, with the max size.

Method Detail

clear	back to summary
public void clear()

get	back to summary
public Object get(Object key) Return the pre-parsed query that represents the EJBQL string. If the EJBQL has not been cached, null is returned.

getCache	back to summary
public Map<K, V> getCache() Return the cache.

getMaxSize	back to summary
public int getMaxSize() Return the fixed size of the parse cache.

put	back to summary
public void put(Object key, Object value) Add the value to the cache. Remove the

remove	back to summary
public void remove(Object key) Remove from cache.

setMaxSize	back to summary
public void setMaxSize(int maxSize) Set the fixed size of the parse cache. When the size is exceeded, subsequent EJBQL will not be cached. The default size is 100;