freemarker.cache

Class StrongCacheStorage

java.lang.Object

freemarker.cache.StrongCacheStorage

All Implemented Interfaces:

CacheStorage, CacheStorageWithGetSize, ConcurrentCacheStorage

public class StrongCacheStorage
extends Object
implements ConcurrentCacheStorage, CacheStorageWithGetSize

Strong cache storage is a cache storage that simply wraps a Map. It holds a strong reference to all objects it was passed, therefore prevents the cache from being purged during garbage collection. This class is thread-safe to the extent that its underlying map is. The default implementation uses a concurrent map on Java 5 and above, so it's thread-safe in that case.

See Also:

Configuration.setCacheStorage(CacheStorage)

Constructor Summary

Constructors

Constructor and Description
StrongCacheStorage()

Method Summary

Modifier and Type	Method and Description
void	clear()
Object	get(Object key)
int	getSize() Returns a close approximation of the number of cache entries.
boolean	isConcurrent() Returns true if the underlying Map is a ConcurrentMap.
void	put(Object key, Object value)
void	remove(Object key)

Methods inherited from class java.lang.Object

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

Constructor Detail

StrongCacheStorage

public StrongCacheStorage()

Method Detail

isConcurrent

public boolean isConcurrent()

Returns true if the underlying Map is a ConcurrentMap.

Specified by:

isConcurrent in interface ConcurrentCacheStorage

Returns:

true if this instance of cache storage is concurrently accessible from multiple threads without synchronization.

get

public Object get(Object key)

Specified by:

get in interface CacheStorage

put

public void put(Object key,
                Object value)

Specified by:

put in interface CacheStorage

remove

public void remove(Object key)

Specified by:

remove in interface CacheStorage

getSize

public int getSize()

Returns a close approximation of the number of cache entries.

Specified by:

getSize in interface CacheStorageWithGetSize

Since:

2.3.21

clear

public void clear()

Specified by:

clear in interface CacheStorage