org.apache.jena.tdb2

Class DatabaseMgr

java.lang.Object

org.apache.jena.tdb2.DatabaseMgr

public class DatabaseMgr
extends Object

Operations for TDBS DatasetGraph, including admin operations See TDB2Factory for creating API-level Datasets.

See Also:

TDB2Factory

Constructor Summary

Constructors

Constructor and Description
DatabaseMgr()

Method Summary

Modifier and Type	Method and Description
static String	backup(org.apache.jena.sparql.core.DatasetGraph container) Create a backup for a switchable TDB database.
static void	compact(org.apache.jena.sparql.core.DatasetGraph container) Compact a datasets which must be a switchable TDB database.
static org.apache.jena.sparql.core.DatasetGraph	connectDatasetGraph(org.apache.jena.dboe.base.file.Location location) Create or connect to a TDB2-backed dataset
static org.apache.jena.sparql.core.DatasetGraph	connectDatasetGraph(String location) Create or connect to a TDB2-backed dataset
static org.apache.jena.sparql.core.DatasetGraph	createDatasetGraph() Create an in-memory TDB2-backed dataset (for testing)
static boolean	isBackedByTDB(org.apache.jena.sparql.core.DatasetGraph datasetGraph) Deprecated. Use isTDB2(org.apache.jena.sparql.core.DatasetGraph).
static boolean	isTDB2(org.apache.jena.sparql.core.DatasetGraph datasetGraph) Return whether a DatasetGraph is a TDB2 database.
static org.apache.jena.dboe.base.file.Location	location(org.apache.jena.sparql.core.DatasetGraph datasetGraph) Return the location of a DatasetGraph if it is backed by TDB, else null.

Methods inherited from class java.lang.Object

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

Constructor Detail

DatabaseMgr

public DatabaseMgr()

Method Detail

connectDatasetGraph

public static org.apache.jena.sparql.core.DatasetGraph connectDatasetGraph(org.apache.jena.dboe.base.file.Location location)

Create or connect to a TDB2-backed dataset

connectDatasetGraph

public static org.apache.jena.sparql.core.DatasetGraph connectDatasetGraph(String location)

Create or connect to a TDB2-backed dataset

compact

public static void compact(org.apache.jena.sparql.core.DatasetGraph container)

Compact a datasets which must be a switchable TDB database. This is the normal dataset type for on-disk TDB2 databases.

Parameters:

container -

backup

public static String backup(org.apache.jena.sparql.core.DatasetGraph container)

Create a backup for a switchable TDB database. This is the normal dataset type for on-disk TDB2 databases.

The backup is created in the databases folder, under "Backups".

Backup creates a consistent copy og the database. It is performed as a read-transaction and does not lock out other use of the dataset.

Parameters:

container -

Returns:

File name of the backup.

createDatasetGraph

public static org.apache.jena.sparql.core.DatasetGraph createDatasetGraph()

Create an in-memory TDB2-backed dataset (for testing)

isBackedByTDB

@Deprecated
public static boolean isBackedByTDB(org.apache.jena.sparql.core.DatasetGraph datasetGraph)

Deprecated. Use isTDB2(org.apache.jena.sparql.core.DatasetGraph).

Return whether a DatasetGraph is TDB2.

isTDB2

public static boolean isTDB2(org.apache.jena.sparql.core.DatasetGraph datasetGraph)

Return whether a DatasetGraph is a TDB2 database.

location

public static org.apache.jena.dboe.base.file.Location location(org.apache.jena.sparql.core.DatasetGraph datasetGraph)

Return the location of a DatasetGraph if it is backed by TDB, else null.