Java RepositoryConnection.rollback方法代碼示例

import org.openrdf.repository.RepositoryConnection; //導入方法依賴的package包/類
@Override
public DbInfo create( DbInfo t ) throws Exception {
	RepositoryConnection rc = store.getConnection();
	UriBuilder urib = UriBuilder.getBuilder( WEBDS.NAMESPACE + "dbinfo" );
	URI uri = urib.uniqueUri();
	rc.begin();
	try{
		rc.add( getCreateStatements( uri, t, rc.getValueFactory() ) );
		rc.commit();
	}
	catch( RepositoryException re ){
		rc.rollback();
		throw re;
	}
	return t;
}
 

import org.openrdf.repository.RepositoryConnection; //導入方法依賴的package包/類
@Override
public void remove( DbInfo t ) throws Exception {
	RepositoryConnection rc = store.getConnection();

	Resource idToRemove = getId( t, rc );
	if ( null != idToRemove ) {
		try{
			rc.begin();
			rc.remove( idToRemove, null, null );
			rc.commit();
		}
		catch( RepositoryException re ){
			rc.rollback();
			throw re;
		}
	}
}
 

import org.openrdf.repository.RepositoryConnection; //導入方法依賴的package包/類
@Override
public void update( DbInfo data ) throws Exception {
	RepositoryConnection rc = store.getConnection();
	Resource id = getId( data, rc );
	if ( null != id ) {
		try{
			rc.begin();
			rc.remove( id, null, null );
			rc.add( getCreateStatements( id, data, rc.getValueFactory() ) );
			rc.commit();
		}
		catch( RepositoryException re ){
			rc.rollback();
			throw re;
		}
	}
}
 

import org.openrdf.repository.RepositoryConnection; //導入方法依賴的package包/類
@Override
public void update( User user ) throws Exception {
	RepositoryConnection rc = store.getConnection();
	try {
		Map<URI, DbAccess> accesses = getAccesses( user );

		Resource id = getId( user, rc );
		if ( null != id ) {
			rc.begin();
			rc.remove( id, null, null );
			rc.add( getCreateStatements( id, user, rc.getValueFactory() ) );

			addAccesses( id, accesses, rc );
			rc.commit();
		}
	}
	catch ( RepositoryException e ) {
		log.error( e, e );
		try {
			rc.rollback();
		}
		catch ( Exception x ) {
			log.warn( x, x );
		}
	}
}
 

import org.openrdf.repository.RepositoryConnection; //導入方法依賴的package包/類
/**
 * Sets the access level from the given map. To remove access from a DB, user
 * {@link DbAccess#NONE}.
 *
 * @param user
 * @param access a mapping of URIs (either {@link DbInfo#getDataUrl()} or
 * {@link DbInfo#getInsightsUrl()}) and the access given
 */
public void setAccesses( User user, Map<URI, DbAccess> access ) {
	RepositoryConnection rc = store.getConnection();

	try {
		rc.begin();
		Resource id = getId( user, rc );
		addAccesses( id, access, rc );
		rc.commit();
	}
	catch ( RepositoryException e ) {
		log.error( e, e );
		try {
			rc.rollback();
		}
		catch ( Exception x ) {
			log.warn( x, x );
		}
	}
}
 

import org.openrdf.repository.RepositoryConnection; //導入方法依賴的package包/類
@Override
public void execute( ModificationExecutor exe ) throws RepositoryException {
	RepositoryConnection rc = getRawConnection();

	try {
		if ( exe.execInTransaction() ) {
			rc.begin();
		}

		exe.exec( rc );

		if ( exe.execInTransaction() ) {
			rc.commit();
		}
	}
	catch ( RepositoryException e ) {
		if ( exe.execInTransaction() ) {
			rc.rollback();
		}

		throw e;
	}
}
 

import org.openrdf.repository.RepositoryConnection; //導入方法依賴的package包/類
/**
 * Rolls back a transaction, if there is a active transaction
 * using a connection.
 * 
 * This method is intended to roll back a transaction after an exception
 * occured. Any occuring exceptions while rolling back will be added as
 * suppressed exceptions to the given exception.
 * @param conn the connection on which the transaction should be rolled back
 * @param ex an exception that caused the rollback
 */
protected void rollback(RepositoryConnection conn, Exception ex) {
	try {
		if (conn.isActive()) {
			conn.rollback();
		}
	} catch (RepositoryException ex2) {
		ex.addSuppressed(ex2);
	}
}