/**
* This file is part of Graylog.
*
* Graylog is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Graylog is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Graylog. If not, see <http://www.gnu.org/licenses/>.
*/
package org.graylog2.indexer.indexset;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.ImmutableList;
import org.bson.types.ObjectId;
import org.graylog2.bindings.providers.MongoJackObjectMapperProvider;
import org.graylog2.database.MongoConnection;
import org.graylog2.events.ClusterEventBus;
import org.graylog2.indexer.indexset.events.IndexSetCreatedEvent;
import org.graylog2.indexer.indexset.events.IndexSetDeletedEvent;
import org.graylog2.plugin.cluster.ClusterConfigService;
import org.graylog2.streams.StreamService;
import org.mongojack.DBQuery;
import org.mongojack.DBSort;
import org.mongojack.JacksonDBCollection;
import org.mongojack.WriteResult;
import javax.inject.Inject;
import java.util.Iterator;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;
import static com.google.common.base.Preconditions.checkState;
import static java.util.Objects.requireNonNull;
public class MongoIndexSetService implements IndexSetService {
private static final String COLLECTION_NAME = "index_sets";
private final JacksonDBCollection<IndexSetConfig, ObjectId> collection;
private final ClusterConfigService clusterConfigService;
private final ClusterEventBus clusterEventBus;
private final StreamService streamService;
@Inject
public MongoIndexSetService(MongoConnection mongoConnection,
MongoJackObjectMapperProvider objectMapperProvider,
StreamService streamService,
ClusterConfigService clusterConfigService,
ClusterEventBus clusterEventBus) {
this(JacksonDBCollection.wrap(
mongoConnection.getDatabase().getCollection(COLLECTION_NAME),
IndexSetConfig.class,
ObjectId.class,
objectMapperProvider.get()),
streamService,
clusterConfigService,
clusterEventBus);
}
@VisibleForTesting
protected MongoIndexSetService(JacksonDBCollection<IndexSetConfig, ObjectId> collection,
StreamService streamService,
ClusterConfigService clusterConfigService,
ClusterEventBus clusterEventBus) {
this.collection = requireNonNull(collection);
this.streamService = streamService;
this.clusterConfigService = clusterConfigService;
this.clusterEventBus = requireNonNull(clusterEventBus);
this.collection.getDbCollection().createIndex(DBSort.asc(IndexSetConfig.FIELD_INDEX_PREFIX), null, true);
this.collection.getDbCollection().createIndex(DBSort.desc(IndexSetConfig.FIELD_CREATION_DATE));
}
/**
* {@inheritDoc}
*/
@Override
public Optional<IndexSetConfig> get(String id) {
return get(new ObjectId(id));
}
/**
* {@inheritDoc}
*/
@Override
public Optional<IndexSetConfig> get(ObjectId id) {
final DBQuery.Query query = DBQuery.is("_id", id);
final IndexSetConfig indexSetConfig = collection.findOne(query);
return Optional.ofNullable(indexSetConfig);
}
@Override
public IndexSetConfig getDefault() {
final DefaultIndexSetConfig defaultIndexSetConfig = clusterConfigService.get(DefaultIndexSetConfig.class);
checkState(defaultIndexSetConfig != null, "No default index set configured. This is a bug!");
final String indexSetId = defaultIndexSetConfig.defaultIndexSetId();
return get(indexSetId)
.orElseThrow(() -> new IllegalStateException("Couldn't find default index set <" + indexSetId + ">. This is a bug!"));
}
/**
* {@inheritDoc}
*/
@Override
public Optional<IndexSetConfig> findOne(DBQuery.Query query) {
return Optional.ofNullable(collection.findOne(query));
}
/**
* {@inheritDoc}
*/
@Override
public List<IndexSetConfig> findAll() {
return ImmutableList.copyOf((Iterator<? extends IndexSetConfig>) collection.find().sort(DBSort.asc("title")));
}
/**
* {@inheritDoc}
*/
@Override
public List<IndexSetConfig> findPaginated(Set<String> indexSetIds, int limit, int skip) {
final List<DBQuery.Query> idQuery = indexSetIds.stream()
.map(id -> DBQuery.is("_id", id))
.collect(Collectors.toList());
final DBQuery.Query query = DBQuery.or(idQuery.toArray(new DBQuery.Query[0]));
return ImmutableList.copyOf(collection.find(query)
.sort(DBSort.asc("title"))
.skip(skip)
.limit(limit)
.toArray());
}
/**
* {@inheritDoc}
*/
@Override
public IndexSetConfig save(IndexSetConfig indexSetConfig) {
final WriteResult<IndexSetConfig, ObjectId> writeResult = collection.save(indexSetConfig);
final IndexSetConfig savedObject = writeResult.getSavedObject();
final IndexSetCreatedEvent createdEvent = IndexSetCreatedEvent.create(savedObject);
clusterEventBus.post(createdEvent);
return savedObject;
}
/**
* {@inheritDoc}
*/
@Override
public int delete(String id) {
return delete(new ObjectId(id));
}
/**
* {@inheritDoc}
*/
@Override
public int delete(ObjectId id) {
if (!isDeletable(id)) {
return 0;
}
final DBQuery.Query query = DBQuery.is("_id", id);
final WriteResult<IndexSetConfig, ObjectId> writeResult = collection.remove(query);
final int removedEntries = writeResult.getN();
if (removedEntries > 0) {
final IndexSetDeletedEvent deletedEvent = IndexSetDeletedEvent.create(id.toHexString());
clusterEventBus.post(deletedEvent);
}
return removedEntries;
}
private boolean isDeletable(ObjectId id) {
return streamService.loadAllWithIndexSet(id.toHexString()).isEmpty();
}
}