org.exist.storage
Class CollectionCacheManager

java.lang.Object
  org.exist.storage.CollectionCacheManager

All Implemented Interfaces:

CacheManager

public class CollectionCacheManager
extends Object
implements CacheManager

Field Summary

static String

PROPERTY_CACHE_SIZE

Constructor Summary

CollectionCacheManager(Configuration config, CollectionCache cache)

Method Summary

void	checkCaches() Called from the global major sync event to check if caches can be shrinked.
void	checkDistribution() Called from the global minor sync event to check if a smaller cache wants to be resized.
void	deregisterCache(Cache cache)
void	registerCache(Cache cache) Register a cache, i.e.
int	requestMem(Cache cache) Called by a cache if it wants to grow.

Methods inherited from class java.lang.Object

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

Field Detail

PROPERTY_CACHE_SIZE

public static final String PROPERTY_CACHE_SIZE

See Also:

Constant Field Values

Constructor Detail

CollectionCacheManager

public CollectionCacheManager(Configuration config,
                              CollectionCache cache)

Method Detail

registerCache

public void registerCache(Cache cache)

Description copied from interface: CacheManager

Register a cache, i.e. put it under control of the cache manager.

Specified by:

registerCache in interface CacheManager

deregisterCache

public void deregisterCache(Cache cache)

Specified by:

deregisterCache in interface CacheManager

requestMem

public int requestMem(Cache cache)

Description copied from interface: CacheManager

Called by a cache if it wants to grow. The cache manager will either deny the request, for example, if there are no spare pages left, or calculate a new cache size and call the cache's Cache.resize(int) method to resize the cache. The amount of pages by which the cache will grow is determined by the cache's growthFactor: Cache.getGrowthFactor().

Specified by:

requestMem in interface CacheManager

Returns:

new cache size, or -1 if no free pages available.

checkCaches

public void checkCaches()

Description copied from interface: CacheManager

Called from the global major sync event to check if caches can be shrinked. If shrinked, the cache will be reset to the default initial cache size.

Specified by:

checkCaches in interface CacheManager

checkDistribution

public void checkDistribution()

Description copied from interface: CacheManager

Called from the global minor sync event to check if a smaller cache wants to be resized. If a huge cache is availabe, the method might decide to shrink this cache by a certain amount to make room for the smaller cache to grow.

Specified by:

checkDistribution in interface CacheManager