com.ibm.jaggr.core.impl.cache

Class GenericCacheImpl<T>

java.lang.Object

com.ibm.jaggr.core.impl.cache.GenericCacheImpl<T>

All Implemented Interfaces:

IGenericCache, Serializable

Direct Known Subclasses:

GzipCacheImpl, LayerCacheImpl, ModuleCacheImpl, ResourceConverterCacheImpl

public abstract class GenericCacheImpl<T>
extends Object
implements IGenericCache, Serializable

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected ConcurrentMap<String,T>	cacheMap

Constructor Summary

Constructors

Modifier	Constructor and Description
	GenericCacheImpl()
protected	GenericCacheImpl(GenericCacheImpl<T> other)

Method Summary

Methods

Modifier and Type	Method and Description
void	clear() Remove all entries in the cache
boolean	contains(String key) Returns true if the entry with the specified key is in the cache
void	dump(Writer writer, Pattern filter) Output the cache info to the specified Writer
T	get(String key) Returns the cache entry with the specified key, or null if the cache entry with the specified key is not in the cache
Set<String>	getKeys() Returns the set of keys associated with entries in the cache
IGenericCache	newInstance() Returns a new, empty, instance of this cache object.
void	setAggregator(IAggregator aggregator) Called for newly created (or de-serialized) caches to set the aggregator instance for this cache.
int	size() Returns the number of entries in the layer cache

Methods inherited from class java.lang.Object

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

Field Detail

cacheMap

protected ConcurrentMap<String,T> cacheMap

Constructor Detail

GenericCacheImpl

public GenericCacheImpl()

GenericCacheImpl

protected GenericCacheImpl(GenericCacheImpl<T> other)

Method Detail

get

public T get(String key)

Returns the cache entry with the specified key, or null if the cache entry with the specified key is not in the cache

Parameters:

key - the entry key

Returns:

the requested entry or null

size

public int size()

Description copied from interface: IGenericCache

Returns the number of entries in the layer cache

Specified by:

size in interface IGenericCache

Returns:

the number of entries

contains

public boolean contains(String key)

Description copied from interface: IGenericCache

Returns true if the entry with the specified key is in the cache

Specified by:

contains in interface IGenericCache

Parameters:

key - the entry key

Returns:

true if the specified entry is in the cache

getKeys

public Set<String> getKeys()

Description copied from interface: IGenericCache

Returns the set of keys associated with entries in the cache

Specified by:

getKeys in interface IGenericCache

Returns:

the key set

clear

public void clear()

Description copied from interface: IGenericCache

Remove all entries in the cache

Specified by:

clear in interface IGenericCache

setAggregator

public void setAggregator(IAggregator aggregator)

Description copied from interface: IGenericCache

Called for newly created (or de-serialized) caches to set the aggregator instance for this cache. Note that the aggregator may not be fully initialized at the time that this method is called and some aggregator methods (like IAggregator.getConfig() may return null if called from within this method.

Specified by:

setAggregator in interface IGenericCache

Parameters:

aggregator - The aggregator instance for the cache

dump

public void dump(Writer writer,
        Pattern filter)
          throws IOException

Description copied from interface: IGenericCache

Output the cache info to the specified Writer

Specified by:

dump in interface IGenericCache

Parameters:

writer - the target Writer

filter - Optional filter argument

Throws:

IOException

newInstance

public IGenericCache newInstance()

Description copied from interface: IGenericCache

Returns a new, empty, instance of this cache object. Used by the cache manager when clearing the aggregator cache.

Specified by:

newInstance in interface IGenericCache

Returns:

a new instance of this cache object