Package org.aksw.jenax.dataaccess.sparql.polyfill.datasource

Class RdfDataSourceWithLocalCache

java.lang.Object

org.aksw.jenax.dataaccess.sparql.datasource.RDFDataSourceWrapperBase<RDFDataSource>

org.aksw.jenax.dataaccess.sparql.polyfill.datasource.RdfDataSourceWithLocalCache

All Implemented Interfaces:

RDFDataSource, RDFDataSourceWrapper<RDFDataSource>

public class RdfDataSourceWithLocalCache
extends RDFDataSourceWrapperBase<RDFDataSource>

A rewrite that attempts to inject cache operations around group by computations. SERVICE <cache:> { SERVICE <env:REMOTE> { GROUP-BY } }

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	RdfDataSourceWithLocalCache.OpRewriteInjectCacheOps	Rewriter that injects cache ops as the parent of group by ops.
static class	RdfDataSourceWithLocalCache.TransformInjectCacheSyntax	FIXME This class is not 'broken' but it serves the purpose where the underlying service supports caching with the service enhancer plugin.

Field Summary

Fields

Modifier and Type	Field	Description
static final org.apache.jena.graph.Node	CACHE_NODE
org.apache.jena.query.Dataset	proxyDataset	Requests go to this dataset which is configured to delegate SERVICE >env://REMOTE> requests to the delegate data source
static final String	REMOTE_IRI
static final org.apache.jena.graph.Node	REMOTE_NODE

Fields inherited from class org.aksw.jenax.dataaccess.sparql.datasource.RDFDataSourceWrapperBase

delegate

Constructor Summary

Constructors

Constructor	Description
RdfDataSourceWithLocalCache(RDFDataSource delegate)

Method Summary

Modifier and Type	Method	Description
static org.apache.jena.query.Dataset	createProxyDataset(RDFDataSource delegate)	Create an (empty) dataset with a special ServiceExecutorRegistry that handles caching and remote requests.
org.apache.jena.rdfconnection.RDFConnection	getConnection()	By default, use the delegate's connection.
static void	main(String[] args)
static org.apache.jena.sparql.algebra.Op	unwrapIfCached(org.apache.jena.sparql.algebra.Op op)
static Map.Entry<org.apache.jena.sparql.algebra.Op,Boolean>	wrapWithCache(org.apache.jena.sparql.algebra.Op op)
static org.apache.jena.sparql.algebra.Op	wrapWithCacheOp(org.apache.jena.sparql.algebra.Op op)
static org.apache.jena.sparql.algebra.Op	wrapWithRemote(org.apache.jena.sparql.algebra.Op op)

Methods inherited from class org.aksw.jenax.dataaccess.sparql.datasource.RDFDataSourceWrapperBase

getDelegate

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.aksw.jenax.dataaccess.sparql.datasource.RDFDataSource

asLinkSource, asQef, getDataset, newQuery, newUpdate, query, query, update, update, update

Field Details

REMOTE_IRI

public static final String REMOTE_IRI

See Also:

• Constant Field Values

REMOTE_NODE

public static final org.apache.jena.graph.Node REMOTE_NODE

CACHE_NODE

public static final org.apache.jena.graph.Node CACHE_NODE

proxyDataset

public org.apache.jena.query.Dataset proxyDataset

Requests go to this dataset which is configured to delegate SERVICE >env://REMOTE> requests to the delegate data source

Constructor Details

RdfDataSourceWithLocalCache

public RdfDataSourceWithLocalCache(RDFDataSource delegate)

Method Details

main

public static void main(String[] args)

createProxyDataset

public static org.apache.jena.query.Dataset createProxyDataset(RDFDataSource delegate)

Create an (empty) dataset with a special ServiceExecutorRegistry that handles caching and remote requests.

Parameters:

delegate -

Returns:

getConnection

public org.apache.jena.rdfconnection.RDFConnection getConnection()

Description copied from interface: RDFDataSourceWrapper

By default, use the delegate's connection.

wrapWithCache

public static Map.Entry<org.apache.jena.sparql.algebra.Op,Boolean> wrapWithCache(org.apache.jena.sparql.algebra.Op op)

wrapWithCacheOp

public static org.apache.jena.sparql.algebra.Op wrapWithCacheOp(org.apache.jena.sparql.algebra.Op op)

wrapWithRemote

public static org.apache.jena.sparql.algebra.Op wrapWithRemote(org.apache.jena.sparql.algebra.Op op)

unwrapIfCached

public static org.apache.jena.sparql.algebra.Op unwrapIfCached(org.apache.jena.sparql.algebra.Op op)