Package org.eclipse.rdf4j.sail.lmdb

Class LmdbStore

java.lang.Object

org.eclipse.rdf4j.sail.helpers.AbstractSail

org.eclipse.rdf4j.sail.helpers.AbstractNotifyingSail

org.eclipse.rdf4j.sail.lmdb.LmdbStore

All Implemented Interfaces:

FederatedServiceResolverClient, NotifyingSail, Sail

@Experimental
public class LmdbStore
extends AbstractNotifyingSail
implements FederatedServiceResolverClient

A SAIL implementation using LMDB for storing and querying its data.

Field Summary

Fields inherited from class org.eclipse.rdf4j.sail.helpers.AbstractSail

connectionTimeOut, DEFAULT_CONNECTION_TIMEOUT, DEFAULT_ITERATION_SYNC_THRESHOLD, initializationLock

Constructor Summary

Constructors

Constructor	Description
LmdbStore()	Creates a new LmdbStore with default settings.
LmdbStore(File dataDir)	Creates a new LmdbStore with default settings.
LmdbStore(File dataDir, LmdbStoreConfig config)
LmdbStore(LmdbStoreConfig config)	Creates a new LmdbStore.

Method Summary

Modifier and Type	Method	Description
protected NotifyingSailConnection	getConnectionInternal()	Returns a store-specific SailConnection object.
EvaluationStrategyFactory	getEvaluationStrategyFactory()
FederatedServiceResolver	getFederatedServiceResolver()
protected Lock	getTransactionLock(IsolationLevel level)	This call will block when IsolationLevels.NONE is provided when there are active transactions with a higher isolation and block when a higher isolation is provided when there are active transactions with IsolationLevels.NONE isolation.
ValueFactory	getValueFactory()	Gets a ValueFactory object that can be used to create IRI-, blank node-, literal- and statement objects.
protected void	initializeInternal()	Initializes this LmdbStore.
boolean	isWritable()	Checks whether this Sail object is writable, i.e.
void	setDataDir(File dataDir)	Sets the data directory for the Sail.
void	setEvaluationStrategyFactory(EvaluationStrategyFactory factory)	Sets the EvaluationStrategy to use.
void	setFederatedServiceResolver(FederatedServiceResolver resolver)	Overrides the FederatedServiceResolver used by this instance, but the given resolver is not shutDown when this instance is.
void	shutDown()	Shuts down the Sail, giving it the opportunity to synchronize any stale data.
protected void	shutDownInternal()	Do store-specific operations to ensure proper shutdown of the store.

Methods inherited from class org.eclipse.rdf4j.sail.helpers.AbstractNotifyingSail

addSailChangedListener, getConnection, notifySailChanged, removeSailChangedListener

Methods inherited from class org.eclipse.rdf4j.sail.helpers.AbstractSail

addSupportedIsolationLevel, connectionClosed, debugEnabled, getDataDir, getDefaultIsolationLevel, getIterationCacheSyncThreshold, getSupportedIsolationLevels, init, isInitialized, isTrackResultSize, removeSupportedIsolationLevel, setConnectionTimeOut, setDefaultIsolationLevel, setIterationCacheSyncThreshold, setSupportedIsolationLevels, setSupportedIsolationLevels, setTrackResultSize, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.rdf4j.sail.Sail

getDataDir, getDefaultIsolationLevel, getSupportedIsolationLevels, init

Constructor Detail

LmdbStore

public LmdbStore()

Creates a new LmdbStore with default settings.

LmdbStore

public LmdbStore(LmdbStoreConfig config)

Creates a new LmdbStore.

LmdbStore

public LmdbStore(File dataDir)

Creates a new LmdbStore with default settings.

LmdbStore

public LmdbStore(File dataDir,
                 LmdbStoreConfig config)

Method Detail

setDataDir

public void setDataDir(File dataDir)

Description copied from interface: Sail

Sets the data directory for the Sail. The Sail can use this directory for storage of data, parameters, etc. This directory must be set before the Sail is initialized.

Specified by:

setDataDir in interface Sail

Overrides:

setDataDir in class AbstractSail

getEvaluationStrategyFactory

public EvaluationStrategyFactory getEvaluationStrategyFactory()

Returns:

Returns the EvaluationStrategy.

setEvaluationStrategyFactory

public void setEvaluationStrategyFactory(EvaluationStrategyFactory factory)

Sets the EvaluationStrategy to use.

getFederatedServiceResolver

public FederatedServiceResolver getFederatedServiceResolver()

Returns:

Returns the SERVICE resolver.

setFederatedServiceResolver

public void setFederatedServiceResolver(FederatedServiceResolver resolver)

Overrides the FederatedServiceResolver used by this instance, but the given resolver is not shutDown when this instance is.

Specified by:

setFederatedServiceResolver in interface FederatedServiceResolverClient

Parameters:

resolver - The SERVICE resolver to set.

initializeInternal

protected void initializeInternal()
                           throws SailException

Initializes this LmdbStore.

Overrides:

initializeInternal in class AbstractSail

Throws:

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

shutDownInternal

protected void shutDownInternal()
                         throws SailException

Description copied from class: AbstractSail

Do store-specific operations to ensure proper shutdown of the store.

Specified by:

shutDownInternal in class AbstractSail

Throws:

SailException

shutDown

public void shutDown()
              throws SailException

Description copied from interface: Sail

Shuts down the Sail, giving it the opportunity to synchronize any stale data. Care should be taken that all initialized Sails are being shut down before an application exits to avoid potential loss of data. Once shut down, a Sail can no longer be used until it is re-initialized.

Specified by:

shutDown in interface Sail

Overrides:

shutDown in class AbstractSail

Throws:

SailException - If the Sail object encountered an error or unexpected situation internally.

isWritable

public boolean isWritable()

Description copied from interface: Sail

Checks whether this Sail object is writable, i.e. if the data contained in this Sail object can be changed.

Specified by:

isWritable in interface Sail

getConnectionInternal

protected NotifyingSailConnection getConnectionInternal()
                                                 throws SailException

Description copied from class: AbstractSail

Returns a store-specific SailConnection object.

Specified by:

getConnectionInternal in class AbstractNotifyingSail

Returns:

A connection to the store.

Throws:

SailException

getValueFactory

public ValueFactory getValueFactory()

Description copied from interface: Sail

Gets a ValueFactory object that can be used to create IRI-, blank node-, literal- and statement objects.

Specified by:

getValueFactory in interface Sail

Returns:

a ValueFactory object for this Sail object.

getTransactionLock

protected Lock getTransactionLock(IsolationLevel level)
                           throws SailException

This call will block when IsolationLevels.NONE is provided when there are active transactions with a higher isolation and block when a higher isolation is provided when there are active transactions with IsolationLevels.NONE isolation. Store is either exclusively in IsolationLevels.NONE isolation with potentially zero or more transactions, or exclusively in higher isolation mode with potentially zero or more transactions.

Parameters:

level - indicating desired mode IsolationLevels.NONE or higher

Returns:

Lock used to prevent Store from switching isolation modes

Throws:

SailException