| /** |
| * 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.entity.storage.mongo; |
| |
| import static java.util.Objects.requireNonNull; |
| |
| import java.util.Optional; |
| |
| import org.apache.rya.api.domain.RyaIRI; |
| import org.apache.rya.indexing.entity.model.Type; |
| import org.apache.rya.indexing.entity.storage.TypeStorage; |
| import org.apache.rya.indexing.entity.storage.mongo.DocumentConverter.DocumentConverterException; |
| import org.bson.Document; |
| import org.bson.conversions.Bson; |
| |
| import com.mongodb.MongoClient; |
| import com.mongodb.MongoException; |
| import com.mongodb.client.MongoCursor; |
| import com.mongodb.client.model.Filters; |
| |
| import edu.umd.cs.findbugs.annotations.DefaultAnnotation; |
| import edu.umd.cs.findbugs.annotations.NonNull; |
| |
| /** |
| * A Mongo DB implementation of {@link TypeStorage}. |
| */ |
| @DefaultAnnotation(NonNull.class) |
| public class MongoTypeStorage implements TypeStorage { |
| |
| private static final String COLLECTION_NAME = "entity-types"; |
| |
| private static final TypeDocumentConverter TYPE_CONVERTER = new TypeDocumentConverter(); |
| |
| /** |
| * A client connected to the Mongo instance that hosts the Rya instance. |
| */ |
| private final MongoClient mongo; |
| |
| /** |
| * The name of the Rya instance the {@link Type}s are for. |
| */ |
| private final String ryaInstanceName; |
| |
| /** |
| * Constructs an instance of {@link MongoTypeStorage}. |
| * |
| * @param mongo - A client connected to the Mongo instance that hosts the Rya instance. (not null) |
| * @param ryaInstanceName - The name of the Rya instance the {@link Type}s are for. (not null) |
| */ |
| public MongoTypeStorage(final MongoClient mongo, final String ryaInstanceName) { |
| this.mongo = requireNonNull(mongo); |
| this.ryaInstanceName = requireNonNull(ryaInstanceName); |
| } |
| |
| @Override |
| public void create(final Type type) throws TypeStorageException { |
| requireNonNull(type); |
| |
| try { |
| mongo.getDatabase(ryaInstanceName) |
| .getCollection(COLLECTION_NAME) |
| .insertOne(TYPE_CONVERTER.toDocument(type)); |
| |
| } catch(final MongoException e) { |
| throw new TypeStorageException("Failed to create Type with ID '" + type.getId().getData() + "'.", e); |
| } |
| } |
| |
| @Override |
| public Optional<Type> get(final RyaIRI typeId) throws TypeStorageException { |
| requireNonNull(typeId); |
| |
| try { |
| final Document document = mongo.getDatabase(ryaInstanceName) |
| .getCollection(COLLECTION_NAME) |
| .find( makeIdFilter(typeId) ) |
| .first(); |
| |
| return document == null ? |
| Optional.empty() : |
| Optional.of( TYPE_CONVERTER.fromDocument(document) ); |
| |
| } catch(final MongoException | DocumentConverterException e) { |
| throw new TypeStorageException("Could not get the Type with ID '" + typeId.getData() + "'.", e); |
| } |
| } |
| |
| @Override |
| public ConvertingCursor<Type> search(final RyaIRI propertyName) throws TypeStorageException { |
| requireNonNull(propertyName); |
| |
| try { |
| // Create a Filter that finds Types who have the provided property names. |
| final Bson byPropertyName = Filters.eq(TypeDocumentConverter.PROPERTY_NAMES, propertyName.getData()); |
| |
| final MongoCursor<Document> cursor = mongo.getDatabase(ryaInstanceName) |
| .getCollection(COLLECTION_NAME) |
| .find( byPropertyName ) |
| .iterator(); |
| |
| return new ConvertingCursor<Type>(document -> { |
| try { |
| return TYPE_CONVERTER.fromDocument(document); |
| } catch (final Exception e) { |
| throw new RuntimeException("Could not convert the Document '" + document + "' into a Type.", e); |
| } |
| }, cursor); |
| |
| } catch(final MongoException e) { |
| throw new TypeStorageException("Could not fetch Types that include the property '" + propertyName.getData() + "'.", e); |
| } |
| } |
| |
| @Override |
| public boolean delete(final RyaIRI typeId) throws TypeStorageException { |
| requireNonNull(typeId); |
| |
| try { |
| final Document deleted = mongo.getDatabase(ryaInstanceName) |
| .getCollection(COLLECTION_NAME) |
| .findOneAndDelete( makeIdFilter(typeId) ); |
| |
| return deleted != null; |
| |
| } catch(final MongoException e) { |
| throw new TypeStorageException("Could not delete the Type with ID '" + typeId.getData() + "'.", e); |
| } |
| } |
| |
| private static Bson makeIdFilter(final RyaIRI typeId) { |
| return Filters.eq(TypeDocumentConverter.ID, typeId.getData()); |
| } |
| } |