| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.rya.prospector.service; |
| |
| import static java.util.Objects.requireNonNull; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.accumulo.core.client.AccumuloException; |
| import org.apache.accumulo.core.client.AccumuloSecurityException; |
| import org.apache.accumulo.core.client.Connector; |
| import org.apache.accumulo.core.client.TableNotFoundException; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.rya.accumulo.AccumuloRdfConfiguration; |
| import org.apache.rya.accumulo.utils.ConnectorFactory; |
| import org.apache.rya.api.RdfCloudTripleStoreConfiguration; |
| import org.apache.rya.api.persist.RdfDAOException; |
| import org.apache.rya.api.persist.RdfEvalStatsDAO; |
| import org.apache.rya.prospector.domain.IndexEntry; |
| import org.apache.rya.prospector.domain.TripleValueType; |
| import org.apache.rya.prospector.utils.ProspectorConstants; |
| import org.eclipse.rdf4j.model.Resource; |
| import org.eclipse.rdf4j.model.Value; |
| |
| /** |
| * An ${@link org.apache.rya.api.persist.RdfEvalStatsDAO} that uses the Prospector Service underneath return counts. |
| */ |
| public class ProspectorServiceEvalStatsDAO implements RdfEvalStatsDAO<RdfCloudTripleStoreConfiguration> { |
| |
| private ProspectorService prospectorService; |
| |
| public ProspectorServiceEvalStatsDAO() { |
| } |
| |
| public ProspectorServiceEvalStatsDAO(ProspectorService prospectorService, RdfCloudTripleStoreConfiguration conf) { |
| this.prospectorService = prospectorService; |
| } |
| |
| public ProspectorServiceEvalStatsDAO(Connector connector, RdfCloudTripleStoreConfiguration conf) throws AccumuloException, AccumuloSecurityException { |
| this.prospectorService = new ProspectorService(connector, getProspectTableName(conf)); |
| } |
| |
| /** |
| * Creates an instance of {@link ProspectorServiceEvalStatsDAO} that is connected to the Accumulo and Rya instance |
| * that is specified within the provided {@link Configuration}. |
| * |
| * @param config - Configures which instance of Accumulo Rya this DAO will be backed by. (not null) |
| * @return A new instance of {@link ProspectorServiceEvalStatsDAO}. |
| * @throws AccumuloException The connector couldn't be created because of an Accumulo problem. |
| * @throws AccumuloSecurityException The connector couldn't be created because of an Accumulo security violation. |
| */ |
| public static ProspectorServiceEvalStatsDAO make(Configuration config) throws AccumuloException, AccumuloSecurityException { |
| requireNonNull(config); |
| AccumuloRdfConfiguration accConfig = new AccumuloRdfConfiguration(config); |
| return new ProspectorServiceEvalStatsDAO(ConnectorFactory.connect(accConfig), accConfig); |
| } |
| |
| |
| @Override |
| public void init() { |
| assert prospectorService != null; |
| } |
| |
| @Override |
| public boolean isInitialized() { |
| return prospectorService != null; |
| } |
| |
| @Override |
| public void destroy() { |
| } |
| |
| @Override |
| public double getCardinality(RdfCloudTripleStoreConfiguration conf, CARDINALITY_OF card, List<Value> val) throws RdfDAOException { |
| assert conf != null && card != null && val != null; |
| |
| String triplePart = null; |
| switch (card) { |
| case SUBJECT: |
| triplePart = TripleValueType.SUBJECT.getIndexType(); |
| break; |
| case PREDICATE: |
| triplePart = TripleValueType.PREDICATE.getIndexType(); |
| break; |
| case OBJECT: |
| triplePart = TripleValueType.OBJECT.getIndexType(); |
| break; |
| case SUBJECTPREDICATE: |
| triplePart = TripleValueType.SUBJECT_PREDICATE.getIndexType(); |
| break; |
| case SUBJECTOBJECT: |
| triplePart = TripleValueType.SUBJECT_OBJECT.getIndexType(); |
| break; |
| case PREDICATEOBJECT: |
| triplePart = TripleValueType.PREDICATE_OBJECT.getIndexType(); |
| break; |
| } |
| |
| final String[] auths = conf.getAuths(); |
| final List<String> indexedValues = new ArrayList<>(); |
| final Iterator<Value> valueIt = val.iterator(); |
| while (valueIt.hasNext()){ |
| indexedValues.add(valueIt.next().stringValue()); |
| } |
| |
| double cardinality = -1; |
| try { |
| final List<IndexEntry> entries = prospectorService.query(null, ProspectorConstants.COUNT, triplePart, indexedValues, null, auths); |
| if(!entries.isEmpty()) { |
| cardinality = entries.iterator().next().getCount(); |
| } |
| } catch (final TableNotFoundException e) { |
| throw new RdfDAOException(e); |
| } |
| return cardinality; |
| } |
| |
| @Override |
| public double getCardinality(RdfCloudTripleStoreConfiguration conf, CARDINALITY_OF card, List<Value> val, Resource context) { |
| return getCardinality(conf, card, val); //TODO: Not sure about the context yet |
| } |
| |
| @Override |
| public void setConf(RdfCloudTripleStoreConfiguration conf) { |
| } |
| |
| @Override |
| public RdfCloudTripleStoreConfiguration getConf() { |
| return null; |
| } |
| |
| public static String getProspectTableName(RdfCloudTripleStoreConfiguration conf) { |
| return conf.getTablePrefix() + "prospects"; |
| } |
| |
| /** |
| * This method exists so that the Rya Web project may autowrire itself together |
| * using the Spring framework. |
| * |
| * @param prospectorService - The {@link ProspectorService} that will be used by this DAO. |
| */ |
| public void setProspectorService(ProspectorService prospectorService) { |
| this.prospectorService = prospectorService; |
| } |
| } |