net.fortytwo.linkeddata.sail

Class LinkedDataSail

java.lang.Object

org.openrdf.sail.helpers.AbstractSail

org.openrdf.sail.helpers.SailBase

net.fortytwo.linkeddata.sail.LinkedDataSail

All Implemented Interfaces:

org.openrdf.sail.NotifyingSail, org.openrdf.sail.Sail, org.openrdf.sail.StackableSail

public class LinkedDataSail
extends org.openrdf.sail.helpers.SailBase
implements org.openrdf.sail.StackableSail, org.openrdf.sail.NotifyingSail

A dynamic storage layer which treats the Semantic Web as a single global graph of linked data. LinkedDataSail is layered on top of another Sail which serves as a database for cached Semantic Web documents.

Author:

Joshua Shinavier (http://fortytwo.net)

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	CACHE_LIFETIME
static java.lang.String	DATATYPE_HANDLING_POLICY
static java.lang.String	HTTPCONNECTION_COURTESY_INTERVAL
static java.lang.String	HTTPCONNECTION_TIMEOUT
static java.lang.String	MEMORY_CACHE_CAPACITY
static java.lang.String	RANDOM_URN_PREFIX
static java.lang.String	USE_BLANK_NODES

Fields inherited from class org.openrdf.sail.helpers.AbstractSail

connectionTimeOut, DEFAULT_CONNECTION_TIMEOUT, DEFAULT_ITERATION_SYNC_THRESHOLD, initializationLock, logger

Constructor Summary

Constructors

Constructor and Description
LinkedDataSail(org.openrdf.sail.Sail baseSail)
LinkedDataSail(org.openrdf.sail.Sail baseSail, LinkedDataCache cache)

Method Summary

Modifier and Type	Method and Description
void	addSailChangedListener(org.openrdf.sail.SailChangedListener listener)
org.openrdf.sail.Sail	getBaseSail()
LinkedDataCache	getCache()
org.openrdf.sail.NotifyingSailConnection	getConnection()
protected org.openrdf.sail.SailConnection	getConnectionInternal()
java.io.File	getDataDir()
static java.lang.String	getProperty(java.lang.String name, java.lang.String defaultValue)
org.openrdf.model.ValueFactory	getValueFactory()
void	initialize()
boolean	isWritable()
void	removeSailChangedListener(org.openrdf.sail.SailChangedListener listener)
void	setBaseSail(org.openrdf.sail.Sail baseSail)
void	setDataDir(java.io.File dataDir)
protected void	shutDownInternal()

Methods inherited from class org.openrdf.sail.helpers.AbstractSail

addSupportedIsolationLevel, connectionClosed, debugEnabled, getDefaultIsolationLevel, getIterationCacheSyncThreshold, getSupportedIsolationLevels, initializeInternal, isInitialized, removeSupportedIsolationLevel, setDefaultIsolationLevel, setIterationCacheSyncThreshold, setSupportedIsolationLevels, setSupportedIsolationLevels, shutDown, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.openrdf.sail.Sail

getDefaultIsolationLevel, getSupportedIsolationLevels, shutDown

Field Detail

CACHE_LIFETIME

public static final java.lang.String CACHE_LIFETIME

See Also:

Constant Field Values

DATATYPE_HANDLING_POLICY

public static final java.lang.String DATATYPE_HANDLING_POLICY

See Also:

Constant Field Values

MEMORY_CACHE_CAPACITY

public static final java.lang.String MEMORY_CACHE_CAPACITY

See Also:

Constant Field Values

USE_BLANK_NODES

public static final java.lang.String USE_BLANK_NODES

See Also:

Constant Field Values

HTTPCONNECTION_COURTESY_INTERVAL

public static final java.lang.String HTTPCONNECTION_COURTESY_INTERVAL

See Also:

Constant Field Values

HTTPCONNECTION_TIMEOUT

public static final java.lang.String HTTPCONNECTION_TIMEOUT

See Also:

Constant Field Values

RANDOM_URN_PREFIX

public static final java.lang.String RANDOM_URN_PREFIX

See Also:

Constant Field Values

Constructor Detail

LinkedDataSail

public LinkedDataSail(org.openrdf.sail.Sail baseSail,
                      LinkedDataCache cache)

Parameters:

baseSail - base Sail which provides a storage layer for aggregated RDF data. Note: the base Sail should be initialized before this Sail is used.

cache - a custom WebClosure providing an RDF-document-level view of the Web

LinkedDataSail

public LinkedDataSail(org.openrdf.sail.Sail baseSail)

Parameters:

baseSail - base Sail which provides a storage layer for aggregated RDF data. Note: the base Sail should be initialized before this Sail is used.

Method Detail

getProperty

public static java.lang.String getProperty(java.lang.String name,
                                           java.lang.String defaultValue)

addSailChangedListener

public void addSailChangedListener(org.openrdf.sail.SailChangedListener listener)

Specified by:

addSailChangedListener in interface org.openrdf.sail.NotifyingSail

getConnection

public org.openrdf.sail.NotifyingSailConnection getConnection()
                                                       throws org.openrdf.sail.SailException

Specified by:

getConnection in interface org.openrdf.sail.NotifyingSail

Specified by:

getConnection in interface org.openrdf.sail.Sail

Overrides:

getConnection in class org.openrdf.sail.helpers.AbstractSail

Throws:

org.openrdf.sail.SailException

getConnectionInternal

protected org.openrdf.sail.SailConnection getConnectionInternal()
                                                         throws org.openrdf.sail.SailException

Specified by:

getConnectionInternal in class org.openrdf.sail.helpers.AbstractSail

Throws:

org.openrdf.sail.SailException

getDataDir

public java.io.File getDataDir()

Specified by:

getDataDir in interface org.openrdf.sail.Sail

Overrides:

getDataDir in class org.openrdf.sail.helpers.AbstractSail

getValueFactory

public org.openrdf.model.ValueFactory getValueFactory()

Specified by:

getValueFactory in interface org.openrdf.sail.Sail

initialize

public void initialize()
                throws org.openrdf.sail.SailException

Specified by:

initialize in interface org.openrdf.sail.Sail

Overrides:

initialize in class org.openrdf.sail.helpers.AbstractSail

Throws:

org.openrdf.sail.SailException

isWritable

public boolean isWritable()
                   throws org.openrdf.sail.SailException

Specified by:

isWritable in interface org.openrdf.sail.Sail

Throws:

org.openrdf.sail.SailException

removeSailChangedListener

public void removeSailChangedListener(org.openrdf.sail.SailChangedListener listener)

Specified by:

removeSailChangedListener in interface org.openrdf.sail.NotifyingSail

setDataDir

public void setDataDir(java.io.File dataDir)

Specified by:

setDataDir in interface org.openrdf.sail.Sail

Overrides:

setDataDir in class org.openrdf.sail.helpers.AbstractSail

shutDownInternal

protected void shutDownInternal()
                         throws org.openrdf.sail.SailException

Specified by:

shutDownInternal in class org.openrdf.sail.helpers.AbstractSail

Throws:

org.openrdf.sail.SailException

getBaseSail

public org.openrdf.sail.Sail getBaseSail()

Specified by:

getBaseSail in interface org.openrdf.sail.StackableSail

setBaseSail

public void setBaseSail(org.openrdf.sail.Sail baseSail)

Specified by:

setBaseSail in interface org.openrdf.sail.StackableSail

getCache

public LinkedDataCache getCache()

Returns:

this LinkedDataSail's cache manager