Examples with PcjVarOrderFactory org.apache.rya.indexing.pcj.storage.accumulo.PcjVarOrderFactory used on opensource projects

Example 1 with PcjVarOrderFactory

use of org.apache.rya.indexing.pcj.storage.accumulo.PcjVarOrderFactory in project incubator-rya by apache.

the class PcjIntegrationTestingUtil method createAndPopulatePcj.

// ****************************Creation and Population of PcjTables Accumulo***************************
/**
 * Creates a new PCJ Table in Accumulo and populates it by scanning an
 * instance of Rya for historic matches.
 * <p>
 * If any portion of this operation fails along the way, the partially
 * create PCJ table will be left in Accumulo.
 *
 * @param ryaConn - Connects to the Rya that will be scanned. (not null)
 * @param accumuloConn - Connects to the accumulo that hosts the PCJ results. (not null)
 * @param pcjTableName - The name of the PCJ table that will be created. (not null)
 * @param sparql - The SPARQL query whose results will be loaded into the table. (not null)
 * @param resultVariables - The variables that are included in the query's resulting binding sets. (not null)
 * @param pcjVarOrderFactory - An optional factory that indicates the various variable orders
 *   the results will be stored in. If one is not provided, then {@link ShiftVarOrderFactory}
 *   is used by default. (not null)
 * @throws PcjException The PCJ table could not be create or the values from
 *   Rya were not able to be loaded into it.
 */
public static void createAndPopulatePcj(final RepositoryConnection ryaConn, final Connector accumuloConn, final String pcjTableName, final String sparql, final String[] resultVariables, final Optional<PcjVarOrderFactory> pcjVarOrderFactory) throws PcjException {
    checkNotNull(ryaConn);
    checkNotNull(accumuloConn);
    checkNotNull(pcjTableName);
    checkNotNull(sparql);
    checkNotNull(resultVariables);
    checkNotNull(pcjVarOrderFactory);
    final PcjTables pcj = new PcjTables();
    // Create the PCJ's variable orders.
    final PcjVarOrderFactory varOrderFactory = pcjVarOrderFactory.or(new ShiftVarOrderFactory());
    final Set<VariableOrder> varOrders = varOrderFactory.makeVarOrders(new VariableOrder(resultVariables));
    // Create the PCJ table in Accumulo.
    pcj.createPcjTable(accumuloConn, pcjTableName, varOrders, sparql);
    // Load historic matches from Rya into the PCJ table.
    populatePcj(accumuloConn, pcjTableName, ryaConn);
}