org.openrdf.repository.sail

Class SailRepository

java.lang.Object

org.openrdf.repository.base.RepositoryBase

org.openrdf.repository.sail.SailRepository

All Implemented Interfaces:

HttpClientDependent, SesameClientDependent, FederatedServiceResolverClient, Repository, RepositoryResolverClient

public class SailRepository
extends RepositoryBase
implements FederatedServiceResolverClient, RepositoryResolverClient, HttpClientDependent, SesameClientDependent

An implementation of the Repository interface that operates on a (stack of) Sail object(s). The behaviour of the repository is determined by the Sail stack that it operates on; for example, the repository will only support RDF Schema or OWL semantics if the Sail stack includes an inferencer for this.

Creating a repository object of this type is very easy. For example, the following code creates and initializes a main-memory store with RDF Schema semantics:

 Repository repository = new SailRepository(new ForwardChainingRDFSInferencer(new MemoryStore()));
 repository.initialize();
 

Or, alternatively:

 Sail sailStack = new MemoryStore();
 sailStack = new ForwardChainingRDFSInferencer(sailStack);
 
 Repository repository = new SailRepository(sailStack);
 repository.initialize();
 

Author:

Arjohn Kampman

Constructor Summary

Constructors

Constructor and Description
SailRepository(Sail sail) Creates a new repository object that operates on the supplied Sail.

Method Summary

Modifier and Type	Method and Description
SailRepositoryConnection	getConnection() Opens a connection to this repository that can be used for querying and updating the contents of the repository.
File	getDataDir() Get the directory where data and logging for this repository is stored.
org.apache.http.client.HttpClient	getHttpClient() HttpClient that has been assigned or has been used by this object.
Sail	getSail() Gets the Sail object that is on top of the Sail stack that this repository operates on.
SesameClient	getSesameClient() SesameClient that has been assigned or has been used by this object.
ValueFactory	getValueFactory() Gets a ValueFactory for this Repository.
protected void	initializeInternal()
boolean	isWritable() Checks whether this repository is writable, i.e.
void	setDataDir(File dataDir) Set the directory where data and logging for this repository is stored.
void	setFederatedServiceResolver(FederatedServiceResolver resolver) Sets the FederatedServiceResolver to use for this client.
void	setHttpClient(org.apache.http.client.HttpClient client) Assign an HttpClient that this object should use.
void	setRepositoryResolver(RepositoryResolver resolver)
void	setSesameClient(SesameClient client) Assign an SesameClient that this object should use.
protected void	shutDownInternal()
String	toString()

Methods inherited from class org.openrdf.repository.base.RepositoryBase

initialize, isInitialized, shutDown

Methods inherited from class java.lang.Object

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

Constructor Detail

SailRepository

public SailRepository(Sail sail)

Creates a new repository object that operates on the supplied Sail.

Parameters:

sail - A Sail object.

Method Detail

getDataDir

public File getDataDir()

Description copied from interface: Repository

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

Specified by:

getDataDir in interface Repository

Returns:

the directory where data for this repository is stored.

setDataDir

public void setDataDir(File dataDir)

Description copied from interface: Repository

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

Specified by:

setDataDir in interface Repository

Parameters:

dataDir - the directory where data for this repository is stored

setFederatedServiceResolver

public void setFederatedServiceResolver(FederatedServiceResolver resolver)

Description copied from interface: FederatedServiceResolverClient

Sets the FederatedServiceResolver to use for this client.

Specified by:

setFederatedServiceResolver in interface FederatedServiceResolverClient

Parameters:

resolver - The resolver to use.

setRepositoryResolver

public void setRepositoryResolver(RepositoryResolver resolver)

Specified by:

setRepositoryResolver in interface RepositoryResolverClient

getSesameClient

public SesameClient getSesameClient()

Description copied from interface: SesameClientDependent

SesameClient that has been assigned or has been used by this object. The life cycle might not be or might be tied to this object, depending on whether SesameClient was passed to or created by this object respectively.

Specified by:

getSesameClient in interface SesameClientDependent

Returns:

a SesameClient instance or null

setSesameClient

public void setSesameClient(SesameClient client)

Description copied from interface: SesameClientDependent

Assign an SesameClient that this object should use. The life cycle of the given SesameClient is independent of this object. Closing or shutting down this object does not have any impact on the given client. Callers must ensure that the given client is properly closed elsewhere.

Specified by:

setSesameClient in interface SesameClientDependent

getHttpClient

public org.apache.http.client.HttpClient getHttpClient()

Description copied from interface: HttpClientDependent

HttpClient that has been assigned or has been used by this object. The life cycle might not be or might be tied to this object, depending on whether HttpClient was passed to or created by this object respectively.

Specified by:

getHttpClient in interface HttpClientDependent

Returns:

an HttpClient instance or null

setHttpClient

public void setHttpClient(org.apache.http.client.HttpClient client)

Description copied from interface: HttpClientDependent

Assign an HttpClient that this object should use. The life cycle of the given HttpClient is independent of this object. Closing or shutting down this object does not have any impact on the given client. Callers must ensure that the given client is properly closed elsewhere.

Specified by:

setHttpClient in interface HttpClientDependent

initializeInternal

protected void initializeInternal()
                           throws RepositoryException

Specified by:

initializeInternal in class RepositoryBase

Throws:

RepositoryException

shutDownInternal

protected void shutDownInternal()
                         throws RepositoryException

Specified by:

shutDownInternal in class RepositoryBase

Throws:

RepositoryException

getSail

public Sail getSail()

Gets the Sail object that is on top of the Sail stack that this repository operates on.

Returns:

A Sail object.

isWritable

public boolean isWritable()
                   throws RepositoryException

Description copied from interface: Repository

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 Repository

Throws:

RepositoryException

getValueFactory

public ValueFactory getValueFactory()

Description copied from interface: Repository

Gets a ValueFactory for this Repository.

Specified by:

getValueFactory in interface Repository

Returns:

A repository-specific ValueFactory.

getConnection

public SailRepositoryConnection getConnection()
                                       throws RepositoryException

Description copied from interface: Repository

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();
 }
 

Note that RepositoryConnection is not guaranteed to be thread-safe! The recommended pattern for repository access in a multithreaded application is to share the Repository object between threads, but have each thread create and use its own RepositoryConnections.

Specified by:

getConnection in interface Repository

Returns:

A connection that allows operations on this repository.

Throws:

RepositoryException - If something went wrong during the creation of the Connection.

toString

public String toString()

Overrides:

toString in class Object