virtuoso.rdf4j.driver

Class VirtuosoRepository

java.lang.Object

virtuoso.rdf4j.driver.VirtuosoRepository

All Implemented Interfaces:

org.eclipse.rdf4j.repository.Repository

public class VirtuosoRepository
extends java.lang.Object
implements org.eclipse.rdf4j.repository.Repository

A Sesame repository that contains RDF data that can be queried and updated. Access to the repository can be acquired by openening a connection to it. This connection can then be used to query and/or update the contents of the repository. Depending on the implementation of the repository, it may or may not support multiple concurrent connections.

Please note that a repository needs to be initialized before it can be used and that it should be shut down before it is discarded/garbage collected. Forgetting the latter can result in loss of data (depending on the Repository implementation)!

Constructor Summary

Constructors

Constructor and Description
VirtuosoRepository(javax.sql.ConnectionPoolDataSource ds, java.lang.String defGraph, boolean useLazyAdd)
VirtuosoRepository(javax.sql.DataSource ds, java.lang.String defGraph, boolean useLazyAdd)
VirtuosoRepository(java.lang.String url_hostlist, java.lang.String user, java.lang.String password) Construct a VirtuosoRepository with a specified parameters.
VirtuosoRepository(java.lang.String url_hostlist, java.lang.String user, java.lang.String password, boolean useLazyAdd) Construct a VirtuosoRepository with a specified parameters defGraph will be set to "sesame:nil".
VirtuosoRepository(java.lang.String url_hostlist, java.lang.String user, java.lang.String password, java.lang.String defGraph) Construct a VirtuosoRepository with a specified parameters.
VirtuosoRepository(java.lang.String url_hostlist, java.lang.String user, java.lang.String password, java.lang.String defGraph, boolean useLazyAdd) Construct a VirtuosoRepository with a specified parameters
VirtuosoRepository(javax.sql.XADataSource ds, java.lang.String defGraph)

Method Summary

Modifier and Type	Method and Description
void	createRuleSet(java.lang.String ruleSetName, java.lang.String uriGraphRuleSet) Create ruleSet in DBMS
int	getBatchSize() Get the batch size for Insert data
org.eclipse.rdf4j.repository.RepositoryConnection	getConnection() Opens a connection to this repository that can be used for querying and updating the contents of the repository.
java.io.File	getDataDir() Get the directory where data and logging for this repository is stored.
int	getFetchSize() Get the buffer fetch size
boolean	getInsertBNodeAsVirtuosoIRI() Get the insertBNodeAsURI state for connection
boolean	getInsertStringLiteralAsSimple() Get the insertStringLiteralAsSimple state for connection
int	getQueryTimeout() Get the query timeout seconds
boolean	getRoundrobin() Get the RoundRobin state for connection
java.lang.String	getRuleSet() Get the RuleSet name
boolean	getUseLazyAdd() Get the UseLazyAdd state for connection
org.eclipse.rdf4j.model.ValueFactory	getValueFactory() Gets a ValueFactory for this Repository.
void	initialize() Initializes this repository.
boolean	isInitialized() Indicates if the Repository has been initialized.
boolean	isWritable() Checks whether this repository is writable, i.e.
void	setBatchSize(int sz) Set the batch size for Inserts data(default 5000)
void	setDataDir(java.io.File dataDir) Set the directory where data and logging for this repository is stored.
void	setFetchSize(int sz) Set the buffer fetch size(default 100)
void	setInsertBNodeAsVirtuosoIRI(boolean v) Set the insertBNodeAsURI state for connection(default false)
void	setInsertStringLiteralAsSimple(boolean v) Set the insertStringLiteralAsSimple state for connection(default false)
void	setQueryTimeout(int seconds) Set the query timeout(default 0)
void	setRoundrobin(boolean v) Set the RoundRobin state for connection(default false)
void	setRuleSet(java.lang.String name) Set inference RuleSet name
void	setUseLazyAdd(boolean v) Set the UseLazyAdd state for connection(default true) for XADataSource connection set false and can't be changed
void	shutDown() Shuts the repository down, releasing any resources that it keeps hold of.

Methods inherited from class java.lang.Object

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

Constructor Detail

VirtuosoRepository

public VirtuosoRepository(javax.sql.ConnectionPoolDataSource ds,
                          java.lang.String defGraph,
                          boolean useLazyAdd)

VirtuosoRepository

public VirtuosoRepository(javax.sql.DataSource ds,
                          java.lang.String defGraph,
                          boolean useLazyAdd)

VirtuosoRepository

public VirtuosoRepository(javax.sql.XADataSource ds,
                          java.lang.String defGraph)

VirtuosoRepository

public VirtuosoRepository(java.lang.String url_hostlist,
                          java.lang.String user,
                          java.lang.String password,
                          java.lang.String defGraph,
                          boolean useLazyAdd)

Construct a VirtuosoRepository with a specified parameters

Parameters:

url_hostlist - the Virtuoso JDBC URL connection string or hostlist for poolled connection. Virtuoso database hostlist

        "hostone:1112,hosttwo:1113"
     or "hostone,hosttwo" if default port=1111 is used on hosts
        

user - the database user on whose behalf the connection is being made

password - the user's password

defGraph - a default Graph name, used for Sesame calls, when contexts list is empty, exclude exportStatements, hasStatement, getStatements methods

useLazyAdd - set true to enable using batch optimization for sequence of

          add(Resource subject, URI predicate, Value object, Resource... contexts);
        add(Statement statement, Resource... contexts);
        

methods, when autoCommit mode is off. The triples will be sent to DBMS on commit call or when batch size become more than predefined batch max_size. LazyAdd will be set false for XADataSource connection

VirtuosoRepository

public VirtuosoRepository(java.lang.String url_hostlist,
                          java.lang.String user,
                          java.lang.String password,
                          boolean useLazyAdd)

Construct a VirtuosoRepository with a specified parameters defGraph will be set to "sesame:nil".

Parameters:

url_hostlist - the Virtuoso JDBC URL connection string or hostlist for poolled connection. Virtuoso database hostlist

        "hostone:1112,hosttwo:1113"
     or "hostone,hosttwo" if default port=1111 is used on hosts
        

user - the database user on whose behalf the connection is being made

password - the user's password

useLazyAdd - set true to enable using batch optimization for sequence of

          add(Resource subject, URI predicate, Value object, Resource... contexts);
        add(Statement statement, Resource... contexts);
        

methods, when autoCommit mode is off. The triples will be sent to DBMS on commit call or when batch size become more than predefined batch max_size. LazyAdd will be set false for XADataSource connection

VirtuosoRepository

public VirtuosoRepository(java.lang.String url_hostlist,
                          java.lang.String user,
                          java.lang.String password,
                          java.lang.String defGraph)

Construct a VirtuosoRepository with a specified parameters. useLazyAdd will be set to false.

Parameters:

url_hostlist - the Virtuoso JDBC URL connection string or hostlist for poolled connection. Virtuoso database hostlist

        "hostone:1112,hosttwo:1113"
     or "hostone,hosttwo" if the default port=1111 is used for hosts
        

user - the database user on whose behalf the connection is being made

password - the user's password

defGraph - a default Graph name, used for Sesame calls, when contexts list is empty, exclude exportStatements, hasStatement, getStatements methods

VirtuosoRepository

public VirtuosoRepository(java.lang.String url_hostlist,
                          java.lang.String user,
                          java.lang.String password)

Construct a VirtuosoRepository with a specified parameters. useLazyAdd will be set to false. defGraph will be set to "sesame:nil".

Parameters:

url_hostlist - the Virtuoso JDBC URL connection string or hostlist for poolled connection. Virtuoso database hostlist

        "hostone:1112,hosttwo:1113"
     or "hostone,hosttwo" if the default port=1111 is used for hosts
        

user - the database user on whose behalf the connection is being made

password - the user's password

Method Detail

getConnection

public org.eclipse.rdf4j.repository.RepositoryConnection getConnection()
                                                                throws org.eclipse.rdf4j.repository.RepositoryException

Opens a connection to this repository that can be used for querying and updating the contents of the repository. Created connections need to be closed to make sure that any resources they keep hold of are released. The best way to do this is to use a try-finally-block as follows:

 Connection con = repository.getConnection();
 try {
        // perform operations on the connection
 }
 finally {
        con.close();
 }
 

Specified by:

getConnection in interface org.eclipse.rdf4j.repository.Repository

Returns:

A connection that allows operations on this repository.

Throws:

org.eclipse.rdf4j.repository.RepositoryException - If something went wrong during the creation of the Connection.

setFetchSize

public void setFetchSize(int sz)

Set the buffer fetch size(default 100)

Parameters:

sz - buffer fetch size.

getFetchSize

public int getFetchSize()

Get the buffer fetch size

Returns:

buffer fetch size

setBatchSize

public void setBatchSize(int sz)

Set the batch size for Inserts data(default 5000)

Parameters:

sz - batch size.

getBatchSize

public int getBatchSize()

Get the batch size for Insert data

Returns:

batch size for Insert data

setQueryTimeout

public void setQueryTimeout(int seconds)

Set the query timeout(default 0)

Parameters:

seconds - queryTimeout seconds, 0 - unlimited.

getQueryTimeout

public int getQueryTimeout()

Get the query timeout seconds

Returns:

query timeout

setUseLazyAdd

public void setUseLazyAdd(boolean v)

Set the UseLazyAdd state for connection(default true) for XADataSource connection set false and can't be changed

Parameters:

v - true - useLazyAdd

getUseLazyAdd

public boolean getUseLazyAdd()

Get the UseLazyAdd state for connection

Returns:

useLazyAdd state

setRoundrobin

public void setRoundrobin(boolean v)

Set the RoundRobin state for connection(default false)

Parameters:

v - true - use roundrobin

getRoundrobin

public boolean getRoundrobin()

Get the RoundRobin state for connection

Returns:

roundrobin state

setInsertBNodeAsVirtuosoIRI

public void setInsertBNodeAsVirtuosoIRI(boolean v)

Set the insertBNodeAsURI state for connection(default false)

Parameters:

v - true - insert BNode as Virtuoso IRI false - insert BNode as Virtuoso Native BNode

getInsertBNodeAsVirtuosoIRI

public boolean getInsertBNodeAsVirtuosoIRI()

Get the insertBNodeAsURI state for connection

Returns:

insertBNodeAsURI state

getInsertStringLiteralAsSimple

public boolean getInsertStringLiteralAsSimple()

Get the insertStringLiteralAsSimple state for connection

Returns:

insertStringLiteralAsSimple state

setInsertStringLiteralAsSimple

public void setInsertStringLiteralAsSimple(boolean v)

Set the insertStringLiteralAsSimple state for connection(default false)

Parameters:

v - true - insert String Literals as Simple Literals false - insert String Literals as is

setRuleSet

public void setRuleSet(java.lang.String name)

Set inference RuleSet name

Parameters:

name - RuleSet name.

getRuleSet

public java.lang.String getRuleSet()

Get the RuleSet name

Returns:

ruleSet name

getDataDir

public java.io.File getDataDir()

Get the directory where data and logging for this repository is stored.

Specified by:

getDataDir in interface org.eclipse.rdf4j.repository.Repository

Returns:

the directory where data for this repository is stored.

getValueFactory

public org.eclipse.rdf4j.model.ValueFactory getValueFactory()

Gets a ValueFactory for this Repository.

Specified by:

getValueFactory in interface org.eclipse.rdf4j.repository.Repository

Returns:

A repository-specific ValueFactory.

initialize

public void initialize()
                throws org.eclipse.rdf4j.repository.RepositoryException

Initializes this repository. A repository needs to be initialized before it can be used.

Specified by:

initialize in interface org.eclipse.rdf4j.repository.Repository

Throws:

org.eclipse.rdf4j.repository.RepositoryException - If the initialization failed.

isInitialized

public boolean isInitialized()

Indicates if the Repository has been initialized. Note that the initialization status may change if the Repository is shut down.

Specified by:

isInitialized in interface org.eclipse.rdf4j.repository.Repository

Returns:

true iff the repository has been initialized.

isWritable

public boolean isWritable()
                   throws org.eclipse.rdf4j.repository.RepositoryException

Checks whether this repository is writable, i.e. if the data contained in this repository can be changed. The writability of the repository is determined by the writability of the Sail that this repository operates on.

Specified by:

isWritable in interface org.eclipse.rdf4j.repository.Repository

Throws:

org.eclipse.rdf4j.repository.RepositoryException

setDataDir

public void setDataDir(java.io.File dataDir)

Set the directory where data and logging for this repository is stored.

Specified by:

setDataDir in interface org.eclipse.rdf4j.repository.Repository

Parameters:

dataDir - the directory where data for this repository is stored

shutDown

public void shutDown()
              throws org.eclipse.rdf4j.repository.RepositoryException

Shuts the repository down, releasing any resources that it keeps hold of. Once shut down, the repository can no longer be used until it is re-initialized.

Specified by:

shutDown in interface org.eclipse.rdf4j.repository.Repository

Throws:

org.eclipse.rdf4j.repository.RepositoryException

createRuleSet

public void createRuleSet(java.lang.String ruleSetName,
                          java.lang.String uriGraphRuleSet)
                   throws org.eclipse.rdf4j.repository.RepositoryException

Create ruleSet in DBMS

Parameters:

ruleSetName -

uriGraphRuleSet -

Throws:

org.eclipse.rdf4j.repository.RepositoryException - If something went wrong during the creation of the Connection.