org.apache.jackrabbit.spi.commons

Class ItemInfoCacheImpl

java.lang.Object

org.apache.jackrabbit.spi.commons.ItemInfoCacheImpl

All Implemented Interfaces:

ItemInfoCache

public class ItemInfoCacheImpl
extends java.lang.Object
implements ItemInfoCache

This implementation of ItemInfoCache has a default size of 5000 items. Item infos are put into the cache after they have been read from the RepositoryService. If the cache is full, the oldest item is discarded. Reading items removes them from the cache. The underlying idea here is, that ItemInfos which are supplied by the RepositoryService but not immediately needed are put into the cache to avoid further round trips to RepositoryService. When they are needed later, they are read from the cache. There is no need to keep them in this cache after that point since they are present in the hierarchy from then on.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.jackrabbit.spi.ItemInfoCache

ItemInfoCache.Entry<T extends ItemInfo>

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_CACHE_SIZE Default size of the cache.

Constructor Summary

Constructors

Constructor and Description
ItemInfoCacheImpl() Create a new instance with the default cache size.
ItemInfoCacheImpl(int cacheSize) Create a new instance with a given cache size.

Method Summary

Modifier and Type	Method and Description
void	dispose() Clear the cache and dispose all entries.
ItemInfoCache.Entry<NodeInfo>	getNodeInfo(NodeId nodeId) This implementation removes the item from the cache if it is present.
ItemInfoCache.Entry<PropertyInfo>	getPropertyInfo(PropertyId propertyId) This implementation removes the item from the cache if it is present.
void	put(ItemInfo info, long generation) This implementation cached the item by its id and if the id is uuid based but has no path, also by its path.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_CACHE_SIZE

public static final int DEFAULT_CACHE_SIZE

Default size of the cache.

See Also:

Constant Field Values

Constructor Detail

ItemInfoCacheImpl

public ItemInfoCacheImpl()

Create a new instance with the default cache size.

See Also:

DEFAULT_CACHE_SIZE

ItemInfoCacheImpl

public ItemInfoCacheImpl(int cacheSize)

Create a new instance with a given cache size.

Parameters:

cacheSize -

Method Detail

getNodeInfo

public ItemInfoCache.Entry<NodeInfo> getNodeInfo(NodeId nodeId)

This implementation removes the item from the cache if it is present. Furthermore if the nodeId id uuid based, and no item is found by the nodeId a second lookup is done by the path.

Specified by:

getNodeInfo in interface ItemInfoCache

Parameters:

nodeId - id of the entry to lookup.

Returns:

a Entry<NodeInfo> instance or null if not found.

getPropertyInfo

public ItemInfoCache.Entry<PropertyInfo> getPropertyInfo(PropertyId propertyId)

This implementation removes the item from the cache if it is present. Furthermore if the propertyId id uuid based, and no item is found by the propertyId a second lookup is done by the path.

Specified by:

getPropertyInfo in interface ItemInfoCache

Parameters:

propertyId - id of the entry to lookup.

Returns:

a Entry<PropertyInfo> instance or null if not found.

put

public void put(ItemInfo info,
                long generation)

This implementation cached the item by its id and if the id is uuid based but has no path, also by its path.

Specified by:

put in interface ItemInfoCache

dispose

public void dispose()

Description copied from interface: ItemInfoCache

Clear the cache and dispose all entries.

Specified by:

dispose in interface ItemInfoCache