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MongoThingsSearchUpdaterPersistence.java
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MongoThingsSearchUpdaterPersistence.java
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/*
* Copyright (c) 2017 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.thingsearch.service.persistence.write.impl;
import static com.mongodb.client.model.Filters.in;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import org.bson.BsonDateTime;
import org.bson.BsonDocument;
import org.bson.BsonInt32;
import org.bson.BsonString;
import org.bson.Document;
import org.bson.conversions.Bson;
import org.eclipse.ditto.policies.api.PolicyTag;
import org.eclipse.ditto.policies.model.PolicyId;
import org.eclipse.ditto.things.model.ThingId;
import org.eclipse.ditto.thingsearch.api.PolicyReferenceTag;
import org.eclipse.ditto.thingsearch.service.common.config.SearchPersistenceConfig;
import org.eclipse.ditto.thingsearch.service.persistence.PersistenceConstants;
import org.eclipse.ditto.thingsearch.service.persistence.write.ThingsSearchUpdaterPersistence;
import org.eclipse.ditto.thingsearch.service.persistence.write.model.AbstractWriteModel;
import org.reactivestreams.Publisher;
import com.mongodb.client.model.UpdateManyModel;
import com.mongodb.client.model.UpdateOptions;
import com.mongodb.client.model.WriteModel;
import com.mongodb.reactivestreams.client.MongoCollection;
import com.mongodb.reactivestreams.client.MongoDatabase;
import akka.NotUsed;
import akka.japi.pf.PFBuilder;
import akka.stream.javadsl.Source;
/**
* MongoDB specific implementation of the {@link org.eclipse.ditto.thingsearch.service.persistence.write.ThingsSearchUpdaterPersistence}.
*/
public final class MongoThingsSearchUpdaterPersistence implements ThingsSearchUpdaterPersistence {
private final MongoCollection<Document> collection;
private MongoThingsSearchUpdaterPersistence(final MongoDatabase database,
final SearchPersistenceConfig updaterPersistenceConfig) {
collection = database.getCollection(PersistenceConstants.THINGS_COLLECTION_NAME)
.withReadConcern(updaterPersistenceConfig.readConcern().getMongoReadConcern())
.withReadPreference(updaterPersistenceConfig.readPreference().getMongoReadPreference());
}
/**
* Constructor.
*
* @param database the database.
* @param updaterPersistenceConfig the updater persistence config to use.
*/
public static ThingsSearchUpdaterPersistence of(final MongoDatabase database,
final SearchPersistenceConfig updaterPersistenceConfig) {
return new MongoThingsSearchUpdaterPersistence(database, updaterPersistenceConfig);
}
@Override
public Source<PolicyReferenceTag, NotUsed> getPolicyReferenceTags(final Map<PolicyId, Long> policyRevisions) {
final Bson filter =
in(PersistenceConstants.FIELD_POLICY_ID, policyRevisions.keySet()
.stream()
.map(String::valueOf)
.collect(Collectors.toSet()));
final Publisher<Document> publisher =
collection.find(filter).projection(new Document()
.append(PersistenceConstants.FIELD_ID, new BsonInt32(1))
.append(PersistenceConstants.FIELD_POLICY_ID, new BsonInt32(1)));
return Source.fromPublisher(publisher)
.mapConcat(doc -> {
final ThingId thingId = ThingId.of(doc.getString(PersistenceConstants.FIELD_ID));
final String policyIdString = doc.getString(PersistenceConstants.FIELD_POLICY_ID);
final PolicyId policyId = PolicyId.of(policyIdString);
final Long revision = policyRevisions.get(policyId);
if (revision == null) {
return Collections.emptyList();
} else {
final PolicyTag policyTag = PolicyTag.of(policyId, revision);
return Collections.singletonList(PolicyReferenceTag.of(thingId, policyTag));
}
});
}
@Override
public Source<List<Throwable>, NotUsed> purge(final CharSequence namespace) {
final Bson filter = thingNamespaceFilter(namespace);
final Bson update = new BsonDocument().append(AbstractWriteModel.SET,
new BsonDocument().append(PersistenceConstants.FIELD_DELETE_AT, new BsonDateTime(0L)));
final UpdateOptions updateOptions = new UpdateOptions().bypassDocumentValidation(true);
final WriteModel<Document> writeModel = new UpdateManyModel<>(filter, update, updateOptions);
return Source.fromPublisher(collection.bulkWrite(Collections.singletonList(writeModel)))
.map(bulkWriteResult -> Collections.<Throwable>emptyList())
.recoverWithRetries(1, new PFBuilder<Throwable, Source<List<Throwable>, NotUsed>>()
.matchAny(throwable -> Source.single(Collections.singletonList(throwable)))
.build());
}
private Document thingNamespaceFilter(final CharSequence namespace) {
return new Document().append(PersistenceConstants.FIELD_NAMESPACE, new BsonString(namespace.toString()));
}
}