Package org.eclipse.rdf4j.repository.event.base

Class InterceptingRepositoryWrapper

java.lang.Object

org.eclipse.rdf4j.repository.base.RepositoryWrapper

org.eclipse.rdf4j.repository.event.base.InterceptingRepositoryWrapper

All Implemented Interfaces:

DelegatingRepository, InterceptingRepository, Repository

public class InterceptingRepositoryWrapper
extends RepositoryWrapper
implements InterceptingRepository

Wrapper that notifies interceptors of events on Repositories before they happen. Any interceptor can block the operation by returning true from the relevant notification method. To do so will also cause the notification process to stop, i.e. no other interceptors will be notified. The order in which interceptors are notified is unspecified.

Author:

Herko ter Horst

See Also:

• InterceptingRepositoryConnectionWrapper

Constructor Summary

Constructors

Constructor	Description
InterceptingRepositoryWrapper()
InterceptingRepositoryWrapper(Repository delegate)

Method Summary

Modifier and Type	Method	Description
void	addRepositoryConnectionInterceptor(RepositoryConnectionInterceptor interceptor)	Registers a RepositoryConnectionInterceptor that will receive notifications of operations that are performed on any connections that are created by this repository.
void	addRepositoryInterceptor(RepositoryInterceptor interceptor)	Registers a RepositoryInterceptor that will receive notifications of operations that are performed on this repository.
InterceptingRepositoryConnection	getConnection()	Opens a connection to this repository that can be used for querying and updating the contents of the repository.
void	init()	Initializes this repository.
void	removeRepositoryConnectionInterceptor(RepositoryConnectionInterceptor interceptor)	Removes a registered RepositoryConnectionInterceptor from this repository.
void	removeRepositoryInterceptor(RepositoryInterceptor interceptor)	Removes a registered RepositoryInterceptor from this repository.
void	setDataDir(File dataDir)	Set the directory where data and logging for this repository is stored.
void	shutDown()	Shuts the repository down, releasing any resources that it keeps hold of.

Methods inherited from class org.eclipse.rdf4j.repository.base.RepositoryWrapper

getDataDir, getDelegate, getValueFactory, isInitialized, isWritable, setDelegate, 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.repository.Repository

getDataDir, getValueFactory, isInitialized, isWritable

Constructor Details

InterceptingRepositoryWrapper

public InterceptingRepositoryWrapper()

InterceptingRepositoryWrapper

public InterceptingRepositoryWrapper(Repository delegate)

Method Details

addRepositoryInterceptor

public void addRepositoryInterceptor(RepositoryInterceptor interceptor)

Registers a RepositoryInterceptor that will receive notifications of operations that are performed on this repository.

Specified by:

addRepositoryInterceptor in interface InterceptingRepository

removeRepositoryInterceptor

public void removeRepositoryInterceptor(RepositoryInterceptor interceptor)

Removes a registered RepositoryInterceptor from this repository.

Specified by:

removeRepositoryInterceptor in interface InterceptingRepository

addRepositoryConnectionInterceptor

public void addRepositoryConnectionInterceptor(RepositoryConnectionInterceptor interceptor)

Registers a RepositoryConnectionInterceptor that will receive notifications of operations that are performed on any connections that are created by this repository.

Specified by:

addRepositoryConnectionInterceptor in interface InterceptingRepository

removeRepositoryConnectionInterceptor

public void removeRepositoryConnectionInterceptor(RepositoryConnectionInterceptor interceptor)

Removes a registered RepositoryConnectionInterceptor from this repository.

Specified by:

removeRepositoryConnectionInterceptor in interface InterceptingRepository

getConnection

public InterceptingRepositoryConnection 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-with-resources block, as follows:

 try (RepositoryConnection conn = repository.getConnection()) {
        // perform operations on the connection
 }
 

Note that RepositoryConnection is not guaranteed to be thread-safe! The recommended pattern for repository access in a multi-threaded 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

Overrides:

getConnection in class RepositoryWrapper

Returns:

A connection that allows operations on this repository.

Throws:

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

init

public void init()
          throws RepositoryException

Description copied from interface: Repository

Initializes this repository. A repository needs to be initialized before it can be used, however explicitly calling this method is not necessary: the repository will automatically initialize itself if an operation is executed on it that requires it to be initialized.

Specified by:

init in interface Repository

Overrides:

init in class RepositoryWrapper

Throws:

RepositoryException - If the initialization failed.

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

Overrides:

setDataDir in class RepositoryWrapper

Parameters:

dataDir - the directory where data for this repository is stored

shutDown

public void shutDown()
              throws RepositoryException

Description copied from interface: Repository

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 Repository

Overrides:

shutDown in class RepositoryWrapper

Throws:

RepositoryException