org.openrdf.sail.nativerdf

Class NativeStore

java.lang.Object

org.openrdf.sail.helpers.SailBase

org.openrdf.sail.helpers.NotifyingSailBase

org.openrdf.sail.nativerdf.NativeStore

All Implemented Interfaces:

NotifyingSail, Sail

Direct Known Subclasses:

LimitedSizeNativeStore

public class NativeStore
extends NotifyingSailBase

A SAIL implementation using B-Tree indexing on disk for storing and querying its data.

Author:

Arjohn Kampman, jeen

Field Summary

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

connectionTimeOut, DEFAULT_CONNECTION_TIMEOUT, initializationLock, logger

Constructor Summary

Constructors

Constructor and Description
NativeStore() Creates a new NativeStore.
NativeStore(File dataDir)
NativeStore(File dataDir, String tripleIndexes)

Method Summary

Methods

Modifier and Type	Method and Description
protected double	cardinality(Resource subj, URI pred, Value obj, Resource context)
protected CloseableIteration<? extends Statement,IOException>	createStatementIterator(Resource subj, URI pred, Value obj, boolean includeInferred, boolean readTransaction, Resource... contexts) Creates a statement iterator based on the supplied pattern.
protected NotifyingSailConnection	getConnectionInternal()
protected CloseableIteration<Resource,IOException>	getContextIDs(boolean readTransaction)
protected List<Integer>	getContextIDs(Resource... contexts)
boolean	getForceSync()
protected org.openrdf.sail.nativerdf.NamespaceStore	getNamespaceStore()
protected Lock	getTransactionLock()
String	getTripleIndexes()
protected org.openrdf.sail.nativerdf.TripleStore	getTripleStore()
ValueFactory	getValueFactory()
protected ValueStore	getValueStore()
protected void	initializeInternal() Initializes this NativeStore.
boolean	isWritable()
void	setForceSync(boolean forceSync) Specifiec whether updates should be synced to disk forcefully, must be called before initialization.
void	setNamespaceCacheSize(int namespaceCacheSize)
void	setNamespaceIDCacheSize(int namespaceIDCacheSize)
void	setTripleIndexes(String tripleIndexes) Sets the triple indexes for the native store, must be called before initialization.
void	setValueCacheSize(int valueCacheSize)
void	setValueIDCacheSize(int valueIDCacheSize)
protected void	shutDownInternal()
protected Lock	tryTransactionLock()

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

addSailChangedListener, getConnection, notifySailChanged, removeSailChangedListener

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

connectionClosed, debugEnabled, getDataDir, initialize, isInitialized, setDataDir, 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

getDataDir, initialize, setDataDir, shutDown

Constructor Detail

NativeStore

public NativeStore()

Creates a new NativeStore.

NativeStore

public NativeStore(File dataDir)

NativeStore

public NativeStore(File dataDir,
           String tripleIndexes)

Method Detail

setTripleIndexes

public void setTripleIndexes(String tripleIndexes)

Sets the triple indexes for the native store, must be called before initialization.

Parameters:

tripleIndexes - An index strings, e.g. spoc,posc.

getTripleIndexes

public String getTripleIndexes()

setForceSync

public void setForceSync(boolean forceSync)

Specifiec whether updates should be synced to disk forcefully, must be called before initialization. Enabling this feature may prevent corruption in case of events like power loss, but can have a severe impact on write performance. By default, this feature is disabled.

getForceSync

public boolean getForceSync()

setValueCacheSize

public void setValueCacheSize(int valueCacheSize)

setValueIDCacheSize

public void setValueIDCacheSize(int valueIDCacheSize)

setNamespaceCacheSize

public void setNamespaceCacheSize(int namespaceCacheSize)

setNamespaceIDCacheSize

public void setNamespaceIDCacheSize(int namespaceIDCacheSize)

initializeInternal

protected void initializeInternal()
                           throws SailException

Initializes this NativeStore.

Overrides:

initializeInternal in class SailBase

Throws:

SailException - If this NativeStore could not be initialized using the parameters that have been set.

shutDownInternal

protected void shutDownInternal()
                         throws SailException

Specified by:

shutDownInternal in class SailBase

Throws:

SailException

isWritable

public boolean isWritable()

getConnectionInternal

protected NotifyingSailConnection getConnectionInternal()
                                                 throws SailException

Overrides:

getConnectionInternal in class NotifyingSailBase

Throws:

SailException

getValueFactory

public ValueFactory getValueFactory()

getTripleStore

protected org.openrdf.sail.nativerdf.TripleStore getTripleStore()

getValueStore

protected ValueStore getValueStore()

getNamespaceStore

protected org.openrdf.sail.nativerdf.NamespaceStore getNamespaceStore()

getTransactionLock

protected Lock getTransactionLock()
                           throws SailException

Throws:

SailException

tryTransactionLock

protected Lock tryTransactionLock()

getContextIDs

protected List<Integer> getContextIDs(Resource... contexts)
                               throws IOException

Throws:

IOException

getContextIDs

protected CloseableIteration<Resource,IOException> getContextIDs(boolean readTransaction)
                                                          throws IOException

Throws:

IOException

createStatementIterator

protected CloseableIteration<? extends Statement,IOException> createStatementIterator(Resource subj,
                                                                          URI pred,
                                                                          Value obj,
                                                                          boolean includeInferred,
                                                                          boolean readTransaction,
                                                                          Resource... contexts)
                                                                               throws IOException

Creates a statement iterator based on the supplied pattern.

Parameters:

subj - The subject of the pattern, or null to indicate a wildcard.

pred - The predicate of the pattern, or null to indicate a wildcard.

obj - The object of the pattern, or null to indicate a wildcard.

contexts - The context(s) of the pattern. Note that this parameter is a vararg and as such is optional. If no contexts are supplied the method operates on the entire repository.

Returns:

A StatementIterator that can be used to iterate over the statements that match the specified pattern.

Throws:

IOException

cardinality

protected double cardinality(Resource subj,
                 URI pred,
                 Value obj,
                 Resource context)
                      throws IOException

Throws:

IOException