| /** |
| * 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.geotemporal.mongo; |
| |
| import static java.util.Objects.requireNonNull; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Optional; |
| import java.util.Set; |
| |
| import org.apache.rya.api.domain.RyaIRI; |
| import org.apache.rya.indexing.IndexingExpr; |
| import org.apache.rya.indexing.entity.model.TypedEntity; |
| import org.apache.rya.indexing.entity.storage.mongo.DocumentConverter.DocumentConverterException; |
| import org.apache.rya.indexing.entity.storage.mongo.MongoEntityStorage; |
| import org.apache.rya.indexing.geotemporal.GeoTemporalIndexException; |
| import org.apache.rya.indexing.geotemporal.model.Event; |
| import org.apache.rya.indexing.geotemporal.storage.EventStorage; |
| import org.bson.BsonDocument; |
| import org.bson.BsonString; |
| import org.bson.Document; |
| import org.bson.conversions.Bson; |
| |
| import com.mongodb.BasicDBObjectBuilder; |
| import com.mongodb.DBObject; |
| import com.mongodb.ErrorCategory; |
| import com.mongodb.MongoClient; |
| import com.mongodb.MongoException; |
| import com.mongodb.client.MongoCollection; |
| import com.mongodb.client.MongoCursor; |
| import com.mongodb.client.model.Filters; |
| |
| public class MongoEventStorage implements EventStorage { |
| |
| protected static final String COLLECTION_NAME = "geotemporal-events"; |
| |
| private static final EventDocumentConverter EVENT_CONVERTER = new EventDocumentConverter(); |
| |
| /** |
| * A client connected to the Mongo instance that hosts the Rya instance. |
| */ |
| protected final MongoClient mongo; |
| |
| /** |
| * The name of the Rya instance the {@link TypedEntity}s are for. |
| */ |
| protected final String ryaInstanceName; |
| |
| /* |
| * Used to get the filter query objects. |
| */ |
| private final GeoTemporalMongoDBStorageStrategy queryAdapter; |
| |
| /** |
| * Constructs an instance of {@link MongoEntityStorage}. |
| * |
| * @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 TypedEntity}s are for. (not null) |
| */ |
| public MongoEventStorage(final MongoClient mongo, final String ryaInstanceName) { |
| this.mongo = requireNonNull(mongo); |
| this.ryaInstanceName = requireNonNull(ryaInstanceName); |
| queryAdapter = new GeoTemporalMongoDBStorageStrategy(); |
| } |
| |
| @Override |
| public void create(final Event event) throws EventStorageException { |
| requireNonNull(event); |
| |
| try { |
| mongo.getDatabase(ryaInstanceName) |
| .getCollection(COLLECTION_NAME) |
| .insertOne(EVENT_CONVERTER.toDocument(event)); |
| } catch(final MongoException e) { |
| final ErrorCategory category = ErrorCategory.fromErrorCode( e.getCode() ); |
| if(category == ErrorCategory.DUPLICATE_KEY) { |
| throw new EventAlreadyExistsException("Failed to create Event with Subject '" + event.getSubject().getData() + "'.", e); |
| } |
| throw new EventStorageException("Failed to create Event with Subject '" + event.getSubject().getData() + "'.", e); |
| } |
| } |
| |
| @Override |
| public Optional<Event> get(final RyaIRI subject) throws EventStorageException { |
| requireNonNull(subject); |
| |
| try { |
| final Document document = mongo.getDatabase(ryaInstanceName) |
| .getCollection(COLLECTION_NAME) |
| .find( new BsonDocument(EventDocumentConverter.SUBJECT, new BsonString(subject.getData())) ) |
| .first(); |
| |
| return document == null ? |
| Optional.empty() : |
| Optional.of( EVENT_CONVERTER.fromDocument(document) ); |
| |
| } catch(final MongoException | DocumentConverterException e) { |
| throw new EventStorageException("Could not get the Event with Subject '" + subject.getData() + "'.", e); |
| } |
| } |
| |
| @Override |
| public Collection<Event> search(final Optional<RyaIRI> subject, final Optional<Collection<IndexingExpr>> geoFilters, final Optional<Collection<IndexingExpr>> temporalFilters) throws EventStorageException { |
| requireNonNull(subject); |
| |
| try { |
| final Collection<IndexingExpr> geos = (geoFilters.isPresent() ? geoFilters.get() : new ArrayList<>()); |
| final Collection<IndexingExpr> tempos = (temporalFilters.isPresent() ? temporalFilters.get() : new ArrayList<>()); |
| final DBObject filterObj = queryAdapter.getFilterQuery(geos, tempos); |
| |
| final BasicDBObjectBuilder builder = BasicDBObjectBuilder |
| .start(filterObj.toMap()); |
| if(subject.isPresent()) { |
| builder.append(EventDocumentConverter.SUBJECT, subject.get().getData()); |
| } |
| final MongoCursor<Document> results = mongo.getDatabase(ryaInstanceName) |
| .getCollection(COLLECTION_NAME) |
| .find( BsonDocument.parse(builder.get().toString()) ) |
| .iterator(); |
| |
| final List<Event> events = new ArrayList<>(); |
| while(results.hasNext()) { |
| events.add(EVENT_CONVERTER.fromDocument(results.next())); |
| } |
| return events; |
| } catch(final MongoException | DocumentConverterException | GeoTemporalIndexException e) { |
| throw new EventStorageException("Could not get the Event.", e); |
| } |
| } |
| |
| @Override |
| public void update(final Event old, final Event updated) throws StaleUpdateException, EventStorageException { |
| requireNonNull(old); |
| requireNonNull(updated); |
| |
| // The updated entity must have the same Subject as the one it is replacing. |
| if(!old.getSubject().equals(updated.getSubject())) { |
| throw new EventStorageException("The old Event and the updated Event must have the same Subject. " + |
| "Old Subject: " + old.getSubject().getData() + ", Updated Subject: " + updated.getSubject().getData()); |
| } |
| |
| final Set<Bson> filters = new HashSet<>(); |
| |
| // Must match the old entity's Subject. |
| filters.add( makeSubjectFilter(old.getSubject()) ); |
| |
| // Do a find and replace. |
| final Bson oldEntityFilter = Filters.and(filters); |
| final Document updatedDoc = EVENT_CONVERTER.toDocument(updated); |
| |
| final MongoCollection<Document> collection = mongo.getDatabase(ryaInstanceName).getCollection(COLLECTION_NAME); |
| if(collection.findOneAndReplace(oldEntityFilter, updatedDoc) == null) { |
| throw new StaleUpdateException("Could not update the Event with Subject '" + updated.getSubject().getData() + "."); |
| } |
| } |
| |
| @Override |
| public boolean delete(final RyaIRI subject) throws EventStorageException { |
| requireNonNull(subject); |
| |
| try { |
| final Document deleted = mongo.getDatabase(ryaInstanceName) |
| .getCollection(COLLECTION_NAME) |
| .findOneAndDelete( makeSubjectFilter(subject) ); |
| |
| return deleted != null; |
| |
| } catch(final MongoException e) { |
| throw new EventStorageException("Could not delete the Event with Subject '" + subject.getData() + "'.", e); |
| } |
| } |
| |
| private static Bson makeSubjectFilter(final RyaIRI subject) { |
| return Filters.eq(EventDocumentConverter.SUBJECT, subject.getData()); |
| } |
| } |