| /* |
| * 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.indexing.pcj.fluo.app.export.rya; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static java.util.Objects.requireNonNull; |
| |
| import java.util.Collections; |
| import java.util.Set; |
| |
| import org.apache.rya.api.client.CreatePCJ.ExportStrategy; |
| import org.apache.rya.api.client.CreatePCJ.QueryType; |
| import org.apache.rya.api.model.VisibilityBindingSet; |
| import org.apache.rya.indexing.pcj.fluo.app.export.IncrementalBindingSetExporter; |
| import org.apache.rya.indexing.pcj.storage.PrecomputedJoinStorage; |
| import org.apache.rya.indexing.pcj.storage.PrecomputedJoinStorage.PCJStorageException; |
| |
| import com.google.common.collect.Sets; |
| |
| /** |
| * Incrementally exports SPARQL query results to Accumulo PCJ tables as they are defined by Rya. |
| */ |
| public class RyaBindingSetExporter implements IncrementalBindingSetExporter { |
| |
| private final PrecomputedJoinStorage pcjStorage; |
| |
| /** |
| * Constructs an instance of {@link RyaBindingSetExporter}. |
| * |
| * @param pcjStorage - The PCJ storage the new results will be exported to. (not null) |
| */ |
| public RyaBindingSetExporter(final PrecomputedJoinStorage pcjStorage) { |
| this.pcjStorage = checkNotNull(pcjStorage); |
| } |
| |
| @Override |
| public void export(final String queryId, final VisibilityBindingSet result) throws ResultExportException { |
| requireNonNull(queryId); |
| requireNonNull(result); |
| |
| try { |
| pcjStorage.addResults(queryId, Collections.singleton(result)); |
| } catch (PCJStorageException e) { |
| throw new ResultExportException("Unable to successfully export the result: " + result, e); |
| } |
| } |
| |
| @Override |
| public void close() throws Exception { |
| pcjStorage.close(); |
| } |
| |
| @Override |
| public Set<QueryType> getQueryTypes() { |
| return Sets.newHashSet(QueryType.PROJECTION); |
| } |
| |
| @Override |
| public ExportStrategy getExportStrategy() { |
| return ExportStrategy.RYA; |
| } |
| } |