net.fortytwo.linkeddata

Class CachingMetadata

java.lang.Object

net.fortytwo.linkeddata.CachingMetadata

public class CachingMetadata
extends java.lang.Object

A collection of caching metadata for aggregated Linked Data. A complete set of metadata is maintained in the underlying triple store, while a subset of the data is kept in a fast in-memory cache.

Author:

Joshua Shinavier (http://fortytwo.net)

Constructor Summary

Constructors

Constructor and Description
CachingMetadata(int capacity, org.openrdf.model.ValueFactory valueFactory)

Method Summary

Modifier and Type	Method and Description
void	clear()
CacheEntry	getMemo(java.lang.String graphUri, org.openrdf.sail.SailConnection sc)
void	setMemo(java.lang.String graphUri, CacheEntry memo, org.openrdf.sail.SailConnection sc) Writes metadata to the in-memory cache and, optionally, to the Sail.

Methods inherited from class java.lang.Object

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

Constructor Detail

CachingMetadata

public CachingMetadata(int capacity,
                       org.openrdf.model.ValueFactory valueFactory)

Method Detail

clear

public void clear()

getMemo

public CacheEntry getMemo(java.lang.String graphUri,
                          org.openrdf.sail.SailConnection sc)

setMemo

public void setMemo(java.lang.String graphUri,
                    CacheEntry memo,
                    org.openrdf.sail.SailConnection sc)

Writes metadata to the in-memory cache and, optionally, to the Sail. Note: for now, this metadata resides in the null context.

Parameters:

graphUri - the graph URI of the cached data source

memo - the memo object representing the state of the data source

sc - a connection to the Sail, or null if only the in-memory cache should be updated