org.apache.marmotta.kiwi.caching

Class GuavaCacheManager

java.lang.Object

org.apache.marmotta.kiwi.caching.GuavaCacheManager

All Implemented Interfaces:

CacheManager

public class GuavaCacheManager
extends Object
implements CacheManager

A simple implementation of a cache manager using the Guava caching functionality. Does not support clustered operation.

Author:

Sebastian Schaffert (sschaffert@apache.org)

Field Summary

Fields inherited from interface org.apache.marmotta.kiwi.caching.CacheManager

BNODE_CACHE, LITERAL_CACHE, NODE_CACHE, NS_PREFIX_CACHE, NS_URI_CACHE, REGISTRY_CACHE, TRIPLE_CACHE, URI_CACHE

Constructor Summary

Constructors

Constructor and Description
GuavaCacheManager(KiWiConfiguration configuration)

Method Summary

Methods

Modifier and Type	Method and Description
void	clear() Clear all caches managed by this cache manager.
Map<String,KiWiAnonResource>	getBNodeCache() Return the anonId -> KiWiAnonResource cache from the cache manager.
Map	getCacheByName(String name) Get the cache with the given name from the cache manager.
Map<String,KiWiLiteral>	getLiteralCache() Return the literal cache key -> KiWiLiteral cache from the cache manager.
Map<String,KiWiNamespace>	getNamespacePrefixCache() Return the prefix -> namespace cache from the cache manager.
Map<String,KiWiNamespace>	getNamespaceUriCache() Return the URI -> namespace cache from the cache manager.
Map<Long,KiWiNode>	getNodeCache() Return the node id -> node cache from the cache manager.
Map<Long,Long>	getRegistryCache() Create and return the cache used by the CacheTripleRegistry.
Map<Long,KiWiTriple>	getTripleCache() Return the triple id -> triple cache from the cache manager.
Map<String,KiWiUriResource>	getUriCache() Return the uri -> KiWiUriResource cache from the cache manager.
void	shutdown() Shutdown this cache manager instance.

Methods inherited from class java.lang.Object

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

Constructor Detail

GuavaCacheManager

public GuavaCacheManager(KiWiConfiguration configuration)

Method Detail

getNodeCache

public Map<Long,KiWiNode> getNodeCache()

Return the node id -> node cache from the cache manager. This cache is heavily used to lookup nodes when querying or loading triples and should therefore have a decent size (default 500.000 elements).

Specified by:

getNodeCache in interface CacheManager

Returns:

an EHCache Cache instance containing the node id -> node mappings

getTripleCache

public Map<Long,KiWiTriple> getTripleCache()

Return the triple id -> triple cache from the cache manager. This cache is used for speeding up the construction of query results.

Specified by:

getTripleCache in interface CacheManager

Returns:

getUriCache

public Map<String,KiWiUriResource> getUriCache()

Return the uri -> KiWiUriResource cache from the cache manager. This cache is used when constructing new KiWiUriResources to avoid a database lookup.

Specified by:

getUriCache in interface CacheManager

Returns:

getBNodeCache

public Map<String,KiWiAnonResource> getBNodeCache()

Return the anonId -> KiWiAnonResource cache from the cache manager. This cache is used when constructing new KiWiAnonResources to avoid a database lookup.

Specified by:

getBNodeCache in interface CacheManager

Returns:

getLiteralCache

public Map<String,KiWiLiteral> getLiteralCache()

Return the literal cache key -> KiWiLiteral cache from the cache manager. This cache is used when constructing new KiWiLiterals to avoid a database lookup.

Specified by:

getLiteralCache in interface CacheManager

Returns:

See Also:

LiteralCommons.createCacheKey(String, java.util.Locale, String)

getNamespaceUriCache

public Map<String,KiWiNamespace> getNamespaceUriCache()

Return the URI -> namespace cache from the cache manager. Used for looking up namespaces

Specified by:

getNamespaceUriCache in interface CacheManager

Returns:

getNamespacePrefixCache

public Map<String,KiWiNamespace> getNamespacePrefixCache()

Return the prefix -> namespace cache from the cache manager. Used for looking up namespaces

Specified by:

getNamespacePrefixCache in interface CacheManager

Returns:

getRegistryCache

public Map<Long,Long> getRegistryCache()

Create and return the cache used by the CacheTripleRegistry. This is an unlimited synchronous replicated cache and should be used with care.

Specified by:

getRegistryCache in interface CacheManager

Returns:

getCacheByName

public Map getCacheByName(String name)

Get the cache with the given name from the cache manager. Can be used to request additional caches from the cache manager that are not covered by explicit methods.

Specified by:

getCacheByName in interface CacheManager

Parameters:

name -

Returns:

clear

public void clear()

Clear all caches managed by this cache manager.

Specified by:

clear in interface CacheManager

shutdown

public void shutdown()

Shutdown this cache manager instance. Will shutdown the underlying EHCache cache manager.

Specified by:

shutdown in interface CacheManager