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SearchRootActor.java
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SearchRootActor.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.starter.actors;
import static org.eclipse.ditto.thingsearch.service.persistence.PersistenceConstants.BACKGROUND_SYNC_COLLECTION_NAME;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.ditto.base.service.actors.DittoRootActor;
import org.eclipse.ditto.base.service.config.limits.LimitsConfig;
import org.eclipse.ditto.internal.utils.akka.streaming.TimestampPersistence;
import org.eclipse.ditto.internal.utils.cluster.DistPubSubAccess;
import org.eclipse.ditto.internal.utils.persistence.mongo.DittoMongoClient;
import org.eclipse.ditto.internal.utils.persistence.mongo.streaming.MongoTimestampPersistence;
import org.eclipse.ditto.json.JsonFieldDefinition;
import org.eclipse.ditto.json.JsonKey;
import org.eclipse.ditto.json.JsonPointer;
import org.eclipse.ditto.rql.query.QueryBuilderFactory;
import org.eclipse.ditto.rql.query.expression.FieldExpressionUtil;
import org.eclipse.ditto.rql.query.expression.ThingsFieldExpressionFactory;
import org.eclipse.ditto.things.model.Thing;
import org.eclipse.ditto.thingsearch.service.common.config.SearchConfig;
import org.eclipse.ditto.thingsearch.service.persistence.query.QueryParser;
import org.eclipse.ditto.thingsearch.service.persistence.query.validation.QueryCriteriaValidator;
import org.eclipse.ditto.thingsearch.service.persistence.read.MongoThingsSearchPersistence;
import org.eclipse.ditto.thingsearch.service.persistence.read.ThingsSearchPersistence;
import org.eclipse.ditto.thingsearch.service.persistence.read.query.MongoQueryBuilderFactory;
import org.eclipse.ditto.thingsearch.service.updater.actors.SearchUpdaterRootActor;
import akka.actor.ActorRef;
import akka.actor.ActorSystem;
import akka.actor.Props;
import akka.event.Logging;
import akka.event.LoggingAdapter;
import akka.stream.SystemMaterializer;
/**
* Our "Parent" Actor which takes care of supervision of all other Actors in our system.
*/
public final class SearchRootActor extends DittoRootActor {
/**
* The name of this Actor in the ActorSystem.
*/
public static final String ACTOR_NAME = "thingsWildcardSearchRoot";
private final LoggingAdapter log;
@SuppressWarnings("unused")
private SearchRootActor(final SearchConfig searchConfig, final ActorRef pubSubMediator) {
final var actorSystem = getContext().getSystem();
log = Logging.getLogger(actorSystem, this);
final var mongoDbConfig = searchConfig.getMongoDbConfig();
final var monitoringConfig = mongoDbConfig.getMonitoringConfig();
final DittoMongoClient mongoDbClient = MongoClientExtension.get(actorSystem).getSearchClient();
final var thingsSearchPersistence = getThingsSearchPersistence(searchConfig, mongoDbClient);
final ActorRef searchActor = initializeSearchActor(searchConfig.getLimitsConfig(), thingsSearchPersistence);
pubSubMediator.tell(DistPubSubAccess.put(searchActor), getSelf());
final TimestampPersistence backgroundSyncPersistence =
MongoTimestampPersistence.initializedInstance(BACKGROUND_SYNC_COLLECTION_NAME, mongoDbClient,
SystemMaterializer.get(actorSystem).materializer());
final ActorRef searchUpdaterRootActor = startChildActor(SearchUpdaterRootActor.ACTOR_NAME,
SearchUpdaterRootActor.props(searchConfig, pubSubMediator, thingsSearchPersistence,
backgroundSyncPersistence));
final ActorRef healthCheckingActor = initializeHealthCheckActor(searchConfig, searchUpdaterRootActor);
bindHttpStatusRoute(searchConfig.getHttpConfig(), healthCheckingActor);
}
static QueryParser getQueryParser(final LimitsConfig limitsConfig, final ActorSystem actorSystem) {
final var fieldExpressionFactory = getThingsFieldExpressionFactory();
final QueryBuilderFactory queryBuilderFactory = new MongoQueryBuilderFactory(limitsConfig);
final var queryCriteriaValidator = QueryCriteriaValidator.get(actorSystem);
return QueryParser.of(fieldExpressionFactory, queryBuilderFactory, queryCriteriaValidator);
}
private static void addMapping(final Map<String, String> fieldMappings, final JsonFieldDefinition<?> definition) {
final JsonPointer pointer = definition.getPointer();
final String key = pointer.getRoot().map(JsonKey::toString).orElse("");
final var value = pointer.toString();
fieldMappings.put(key, value);
}
private MongoThingsSearchPersistence getThingsSearchPersistence(final SearchConfig searchConfig,
final DittoMongoClient mongoDbClient) {
final ActorContext context = getContext();
final var persistence =
new MongoThingsSearchPersistence(mongoDbClient, context.getSystem());
final var indexInitializationConfig = searchConfig.getIndexInitializationConfig();
if (indexInitializationConfig.isIndexInitializationConfigEnabled()) {
persistence.initializeIndices();
} else {
log.info("Skipping IndexInitializer because it is disabled.");
}
return searchConfig.getMongoHintsByNamespace()
.map(mongoHintsByNamespace -> {
log.info("Applying MongoDB hints <{}>.", mongoHintsByNamespace);
return persistence.withHintsByNamespace(mongoHintsByNamespace);
})
.orElse(persistence);
}
private ActorRef initializeHealthCheckActor(final SearchConfig searchConfig,
final ActorRef searchUpdaterRootActor) {
return startChildActor(SearchHealthCheckingActorFactory.ACTOR_NAME,
SearchHealthCheckingActorFactory.props(searchConfig, searchUpdaterRootActor));
}
/**
* Creates Akka configuration object Props for this SearchRootActor.
*
* @param searchConfig the configuration settings of this service.
* @param pubSubMediator the PubSub mediator Actor.
* @return the Akka configuration Props object.
*/
public static Props props(final SearchConfig searchConfig, final ActorRef pubSubMediator) {
return Props.create(SearchRootActor.class, searchConfig, pubSubMediator);
}
private static ThingsFieldExpressionFactory getThingsFieldExpressionFactory() {
// Not possible to use ModelBasedThingsFieldExpressionFactory
// because the field expression factory is supposed to map 'thingId' to '_id', which is only meaningful for MongoDB
final Map<String, String> mappings = new HashMap<>(8);
mappings.put(FieldExpressionUtil.FIELD_NAME_THING_ID, FieldExpressionUtil.FIELD_ID);
mappings.put(FieldExpressionUtil.FIELD_NAME_NAMESPACE, FieldExpressionUtil.FIELD_NAMESPACE);
addMapping(mappings, Thing.JsonFields.POLICY_ID); // also present as top-level field in search collection, however not indexed
addMapping(mappings, Thing.JsonFields.REVISION); // also present as top-level field in search collection, however not indexed
addMapping(mappings, Thing.JsonFields.MODIFIED);
addMapping(mappings, Thing.JsonFields.CREATED);
addMapping(mappings, Thing.JsonFields.DEFINITION);
addMapping(mappings, Thing.JsonFields.METADATA);
return ThingsFieldExpressionFactory.of(mappings);
}
private ActorRef initializeSearchActor(final LimitsConfig limitsConfig,
final ThingsSearchPersistence thingsSearchPersistence) {
final var queryParser = getQueryParser(limitsConfig, getContext().getSystem());
return startChildActor(SearchActor.ACTOR_NAME, SearchActor.props(queryParser, thingsSearchPersistence));
}
}