Class LRUTypeCache

java.lang.Object

com.fasterxml.classmate.util.ResolvedTypeCache

com.fasterxml.classmate.util.LRUTypeCache

All Implemented Interfaces:

Serializable

public class LRUTypeCache
extends ResolvedTypeCache

Simple cache used for storing up to specified number of most recently accessed ResolvedType instances. Uses "least-recently used" eviction algorithm (via LinkedHashMap used internally) which optimized retention, but requires full synchronization as read operation also has to modify internal state to maintain LRU aspects. This means that it works well in optimizing access patterns, by keeping most recently accessed types in cache, but may not well work well for highly concurrent cases due to synchronization overhead.

Like all ResolvedTypeCache implementations, access is thread-safe and caller need not (and should not) use additional synchronization.

Since:

1.4

See Also:

• ConcurrentTypeCache
• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static final class	LRUTypeCache.CacheMap	Simple sub-class to get LRU cache

Field Summary

Fields

Modifier and Type	Field	Description
protected final LRUTypeCache.CacheMap	_map
protected final int	_maxEntries
private static final long	serialVersionUID

Constructor Summary

Constructors

Constructor	Description
LRUTypeCache(int maxEntries)

Method Summary

Modifier and Type	Method	Description
ResolvedType	find(ResolvedTypeKey key)
void	put(ResolvedTypeKey key, ResolvedType type)
(package private) Object	readResolve()
int	size()

Methods inherited from class ResolvedTypeCache

_addForTest, concurrentCache, key, key, lruCache

Methods inherited from class Object

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

Field Details

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

_maxEntries

protected final int _maxEntries

_map

protected final transient LRUTypeCache.CacheMap _map

Constructor Details

LRUTypeCache

public LRUTypeCache(int maxEntries)

Method Details

readResolve

Object readResolve()

find

public ResolvedType find(ResolvedTypeKey key)

Specified by:

find in class ResolvedTypeCache

size

public int size()

Specified by:

size in class ResolvedTypeCache

put

public void put(ResolvedTypeKey key,
 ResolvedType type)

Specified by:

put in class ResolvedTypeCache