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

Class InterceptingRepositoryConnectionWrapper

java.lang.Object

org.eclipse.rdf4j.repository.base.AbstractRepositoryConnection

org.eclipse.rdf4j.repository.base.RepositoryConnectionWrapper

org.eclipse.rdf4j.repository.event.base.InterceptingRepositoryConnectionWrapper

All Implemented Interfaces:

AutoCloseable, DelegatingRepositoryConnection, InterceptingRepositoryConnection, RepositoryConnection

public class InterceptingRepositoryConnectionWrapper
extends RepositoryConnectionWrapper
implements InterceptingRepositoryConnection

Wrapper that notifies interceptors of events on RepositoryConnections 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:

• InterceptingRepositoryWrapper

Field Summary

Fields inherited from class org.eclipse.rdf4j.repository.base.AbstractRepositoryConnection

logger

Constructor Summary

Constructors

Constructor	Description
InterceptingRepositoryConnectionWrapper(Repository repository, RepositoryConnection connection)

Method Summary

Modifier and Type	Method	Description
void	addRepositoryConnectionInterceptor(RepositoryConnectionInterceptor interceptor)	Registers a RepositoryConnectionInterceptor that will receive notifications of operations that are performed on this connection.
void	addWithoutCommit(Resource subject, IRI predicate, Value object, Resource... contexts)
void	begin()	Begins a new transaction, requiring RepositoryConnection.commit() or RepositoryConnection.rollback() to be called to end the transaction.
void	clear(Resource... contexts)	Removes all statements from a specific contexts in the repository.
void	clearNamespaces()	Removes all namespace declarations from the repository.
void	close()	Closes the connection, freeing resources.
void	commit()	Commits the active transaction.
protected boolean	isDelegatingAdd()	If false then the following add methods will call RepositoryConnectionWrapper.addWithoutCommit(Resource, IRI, Value, Resource[]).
protected boolean	isDelegatingRemove()	If false then the following remove methods will call RepositoryConnectionWrapper.removeWithoutCommit(Resource, IRI, Value, Resource[]).
Update	prepareUpdate(QueryLanguage ql, String update, String baseURI)	Prepares an Update operation.
void	removeNamespace(String prefix)	Removes a namespace declaration by removing the association between a prefix and a namespace name.
void	removeRepositoryConnectionInterceptor(RepositoryConnectionInterceptor interceptor)	Removes a registered RepositoryConnectionInterceptor from this connection.
void	removeWithoutCommit(Resource subject, IRI predicate, Value object, Resource... contexts)
void	rollback()	Rolls back all updates in the active transaction.
void	setAutoCommit(boolean autoCommit)	Deprecated.
void	setNamespace(String prefix, String name)	Sets the prefix for a namespace.

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

add, add, add, add, add, add, add, add, begin, begin, exportStatements, exportStatements, getContextIDs, getDelegate, getIsolationLevel, getNamespace, getNamespaces, getStatements, hasStatement, hasStatement, isActive, isAutoCommit, isDelegatingRead, isEmpty, isOpen, prepare, prepareBooleanQuery, prepareGraphQuery, prepareQuery, prepareTupleQuery, remove, remove, remove, remove, setDelegate, setIsolationLevel, setParserConfig, size

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

addWithoutCommit, conditionalCommit, conditionalRollback, export, getParserConfig, getRepository, getValueFactory, prepareBooleanQuery, prepareGraphQuery, prepareQuery, prepareTupleQuery, prepareUpdate, removeWithoutCommit, startLocalTransaction

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.rdf4j.repository.RepositoryConnection

add, add, add, add, add, add, add, add, add, add, add, add, add, add, add, begin, begin, export, exportStatements, getContextIDs, getIsolationLevel, getNamespace, getNamespaces, getParserConfig, getRepository, getStatements, getStatements, getValueFactory, hasStatement, hasStatement, isActive, isAutoCommit, isEmpty, isOpen, prepare, prepareBooleanQuery, prepareBooleanQuery, prepareBooleanQuery, prepareGraphQuery, prepareGraphQuery, prepareGraphQuery, prepareQuery, prepareQuery, prepareQuery, prepareTupleQuery, prepareTupleQuery, prepareTupleQuery, prepareUpdate, prepareUpdate, remove, remove, remove, remove, remove, setIsolationLevel, setParserConfig, size

Constructor Details

InterceptingRepositoryConnectionWrapper

public InterceptingRepositoryConnectionWrapper(Repository repository,
 RepositoryConnection connection)

Method Details

addRepositoryConnectionInterceptor

public void addRepositoryConnectionInterceptor(RepositoryConnectionInterceptor interceptor)

Registers a RepositoryConnectionInterceptor that will receive notifications of operations that are performed on this connection.

Specified by:

addRepositoryConnectionInterceptor in interface InterceptingRepositoryConnection

removeRepositoryConnectionInterceptor

public void removeRepositoryConnectionInterceptor(RepositoryConnectionInterceptor interceptor)

Removes a registered RepositoryConnectionInterceptor from this connection.

Specified by:

removeRepositoryConnectionInterceptor in interface InterceptingRepositoryConnection

isDelegatingAdd

protected boolean isDelegatingAdd()

Description copied from class: RepositoryConnectionWrapper

If false then the following add methods will call RepositoryConnectionWrapper.addWithoutCommit(Resource, IRI, Value, Resource[]).

Overrides:

isDelegatingAdd in class RepositoryConnectionWrapper

Returns:

true to delegate add methods, false to call RepositoryConnectionWrapper.addWithoutCommit(Resource, IRI, Value, Resource[])

See Also:

• RepositoryConnectionWrapper.add(Iterable, Resource...)
• RepositoryConnectionWrapper.add(Iteration, Resource...)
• RepositoryConnectionWrapper.add(Statement, Resource...)
• RepositoryConnectionWrapper.add(File, String, RDFFormat, Resource...)
• RepositoryConnectionWrapper.add(InputStream, String, RDFFormat, Resource...)
• RepositoryConnectionWrapper.add(Reader, String, RDFFormat, Resource...)
• RepositoryConnectionWrapper.add(Resource, IRI, Value, Resource...)
• RepositoryConnectionWrapper.add(URL, String, RDFFormat, Resource...)

isDelegatingRemove

protected boolean isDelegatingRemove()

Description copied from class: RepositoryConnectionWrapper

If false then the following remove methods will call RepositoryConnectionWrapper.removeWithoutCommit(Resource, IRI, Value, Resource[]).

Overrides:

isDelegatingRemove in class RepositoryConnectionWrapper

Returns:

true to delegate remove methods, false to call RepositoryConnectionWrapper.removeWithoutCommit(Resource, IRI, Value, Resource...)

See Also:

• RepositoryConnectionWrapper.clear(Resource...)
• RepositoryConnectionWrapper.remove(Iterable, Resource...)
• RepositoryConnectionWrapper.remove(Iteration, Resource...)
• RepositoryConnectionWrapper.remove(Statement, Resource...)
• RepositoryConnectionWrapper.remove(Resource, IRI, Value, Resource...)

addWithoutCommit

public void addWithoutCommit(Resource subject,
 IRI predicate,
 Value object,
 Resource... contexts)
                      throws RepositoryException

Overrides:

addWithoutCommit in class RepositoryConnectionWrapper

Throws:

RepositoryException

clear

public void clear(Resource... contexts)
           throws RepositoryException

Description copied from interface: RepositoryConnection

Removes all statements from a specific contexts in the repository.

Specified by:

clear in interface RepositoryConnection

Overrides:

clear in class RepositoryConnectionWrapper

Parameters:

contexts - The context(s) to remove the data from. Note that this parameter is a vararg and as such is optional. If no contexts are supplied the method operates on the entire repository.

Throws:

RepositoryException - If the statements could not be removed from the repository, for example because the repository is not writable.

begin

public void begin()
           throws RepositoryException

Description copied from interface: RepositoryConnection

Begins a new transaction, requiring RepositoryConnection.commit() or RepositoryConnection.rollback() to be called to end the transaction. The transaction will use the currently set isolation level for this connection.

Specified by:

begin in interface RepositoryConnection

Overrides:

begin in class RepositoryConnectionWrapper

Throws:

RepositoryException - If the connection could not start the transaction. One possible reason this may happen is if a transaction is already active on the current connection.

See Also:

• RepositoryConnection.begin(IsolationLevel)
• RepositoryConnection.isActive()
• RepositoryConnection.commit()
• RepositoryConnection.rollback()
• RepositoryConnection.setIsolationLevel(IsolationLevel)

close

public void close()
           throws RepositoryException

Description copied from interface: RepositoryConnection

Closes the connection, freeing resources. If a transaction is active on the connection, all non-committed operations will be lost by actively calling RepositoryConnection.rollback() on any active transactions.

Implementation note: All implementations must override this method if they have any resources that they need to free.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface RepositoryConnection

Overrides:

close in class RepositoryConnectionWrapper

Throws:

RepositoryException - If the connection could not be closed.

commit

public void commit()
            throws RepositoryException

Description copied from interface: RepositoryConnection

Commits the active transaction. This operation ends the active transaction.

Specified by:

commit in interface RepositoryConnection

Overrides:

commit in class RepositoryConnectionWrapper

Throws:

UnknownTransactionStateException - if the transaction state can not be determined. This can happen for instance when communication with a repository fails or times out.

RepositoryException - If the connection could not be committed, or if the connection does not have an active transaction.

See Also:

• RepositoryConnection.isActive()
• RepositoryConnection.begin()
• RepositoryConnection.rollback()
• RepositoryConnection.prepare()

removeWithoutCommit

public void removeWithoutCommit(Resource subject,
 IRI predicate,
 Value object,
 Resource... contexts)
                         throws RepositoryException

Overrides:

removeWithoutCommit in class RepositoryConnectionWrapper

Throws:

RepositoryException

removeNamespace

public void removeNamespace(String prefix)
                     throws RepositoryException

Description copied from interface: RepositoryConnection

Removes a namespace declaration by removing the association between a prefix and a namespace name.

Specified by:

removeNamespace in interface RepositoryConnection

Overrides:

removeNamespace in class RepositoryConnectionWrapper

Parameters:

prefix - The namespace prefix, or an empty string in case of the default namespace.

Throws:

RepositoryException - If the namespace prefix could not be removed.

clearNamespaces

public void clearNamespaces()
                     throws RepositoryException

Description copied from interface: RepositoryConnection

Removes all namespace declarations from the repository.

Specified by:

clearNamespaces in interface RepositoryConnection

Overrides:

clearNamespaces in class RepositoryConnectionWrapper

Throws:

RepositoryException - If the namespace declarations could not be removed.

rollback

public void rollback()
              throws RepositoryException

Description copied from interface: RepositoryConnection

Rolls back all updates in the active transaction. This operation ends the active transaction.

Specified by:

rollback in interface RepositoryConnection

Overrides:

rollback in class RepositoryConnectionWrapper

Throws:

UnknownTransactionStateException - if the transaction state can not be determined. This can happen for instance when communication with a repository fails or times out.

RepositoryException - If the transaction could not be rolled back, or if the connection does not have an active transaction.

See Also:

• RepositoryConnection.isActive()
• RepositoryConnection.begin()
• RepositoryConnection.commit()

setAutoCommit

@Deprecated
public void setAutoCommit(boolean autoCommit)
                   throws RepositoryException

Deprecated.

Description copied from interface: RepositoryConnection

Enables or disables auto-commit mode for the connection. If a connection is in auto-commit mode, then all updates will be executed and committed as individual transactions. Otherwise, the updates are grouped into transactions that are terminated by a call to either RepositoryConnection.commit() or RepositoryConnection.rollback(). By default, new connections are in auto-commit mode.

NOTE: If this connection is switched to auto-commit mode during a transaction, the transaction is committed.

Specified by:

setAutoCommit in interface RepositoryConnection

Overrides:

setAutoCommit in class RepositoryConnectionWrapper

Throws:

RepositoryException - In case the mode switch failed, for example because a currently active transaction failed to commit.

See Also:

• RepositoryConnection.commit()

setNamespace

public void setNamespace(String prefix,
 String name)
                  throws RepositoryException

Description copied from interface: RepositoryConnection

Sets the prefix for a namespace.

Specified by:

setNamespace in interface RepositoryConnection

Overrides:

setNamespace in class RepositoryConnectionWrapper

Parameters:

prefix - The new prefix, or an empty string in case of the default namespace.

name - The namespace name that the prefix maps to.

Throws:

RepositoryException - If the namespace could not be set in the repository, for example because the repository is not writable.

prepareUpdate

public Update prepareUpdate(QueryLanguage ql,
 String update,
 String baseURI)
                     throws MalformedQueryException,
RepositoryException

Description copied from interface: RepositoryConnection

Prepares an Update operation.

Specified by:

prepareUpdate in interface RepositoryConnection

Overrides:

prepareUpdate in class RepositoryConnectionWrapper

Parameters:

ql - The query language in which the update operation is formulated.

update - The update operation string.

baseURI - The base URI to resolve any relative URIs that are in the update against, can be null if the update does not contain any relative URIs.

Returns:

a Update ready to be executed on this RepositoryConnection.

Throws:

MalformedQueryException - If the supplied update operation string is malformed.

RepositoryException