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andrea.man
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package eu.dnetlib.data.mdstore.modular.mongodb;
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alessia.ba
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import java.util.List;
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import java.util.Map;
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import javax.annotation.Nullable;
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import com.google.common.base.Predicate;
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import com.google.common.collect.Lists;
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import com.google.common.collect.Maps;
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andrea.man
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import com.mongodb.BasicDBObject;
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import com.mongodb.DBObject;
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import com.mongodb.WriteConcern;
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import com.mongodb.client.MongoCollection;
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import com.mongodb.client.model.*;
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import eu.dnetlib.data.mdstore.MDStoreServiceException;
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sandro.lab
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import eu.dnetlib.data.mdstore.modular.MDFormatDescription;
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import eu.dnetlib.data.mdstore.modular.RecordParser;
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sandro.lab
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import eu.dnetlib.data.mdstore.modular.mongodb.utils.IndexFieldRecordParser;
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import eu.dnetlib.data.mdstore.modular.mongodb.utils.IndexFieldRecordParserException;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import static eu.dnetlib.data.mdstore.modular.MDStoreConstants.*;
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public class MongoBulkWritesManager {
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private static final Log log = LogFactory.getLog(MongoBulkWritesManager.class);
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private final boolean discardRecords;
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private final boolean indexRecords;
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private final IndexFieldRecordParser indexFieldRecordParser = new IndexFieldRecordParser();
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private final List<MDFormatDescription> mdref;
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private RecordParser recordParser;
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private MongoCollection<DBObject> validCollection;
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private List<WriteModel<DBObject>> validBulkOperationList;
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private BulkWriteOptions writeOptions;
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private MongoCollection<DBObject> discardedCollection;
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private List<WriteModel<DBObject>> discardedBulkOperationList;
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private int bulkSize;
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public MongoBulkWritesManager(final MongoCollection<DBObject> collection,
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final MongoCollection<DBObject> discardedCollection,
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final List<MDFormatDescription> mdref,
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final int bulkSize,
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final RecordParser parser,
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final boolean discardRecords) {
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this.validCollection = collection.withWriteConcern(WriteConcern.ACKNOWLEDGED);
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this.validBulkOperationList = Lists.newArrayList();
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this.discardedCollection = discardedCollection.withWriteConcern(WriteConcern.ACKNOWLEDGED);
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this.discardedBulkOperationList = Lists.newArrayList();
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this.bulkSize = bulkSize;
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this.recordParser = parser;
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this.discardRecords = discardRecords;
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this.mdref = mdref;
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this.indexRecords = (this.mdref != null && !this.mdref.isEmpty());
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this.writeOptions = new BulkWriteOptions().ordered(false);
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}
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public void insert(final String record) throws MDStoreServiceException {
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Map<String, String> recordProperties = null;
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try {
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recordProperties = recordParser.parseRecord(record);
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} catch (Throwable e) {
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if (discardRecords) {
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log.debug("unhandled exception: " + e.getMessage());
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discardRecord(record);
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}
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}
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Map<String, List<String>> indexRecordField = null;
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try {
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if (indexRecords) {
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indexRecordField = indexFieldRecordParser.parseRecord(record, mdref);
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}
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} catch (IndexFieldRecordParserException e) {
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// could not index record fields
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throw new MDStoreServiceException("Are you using the correct type of store / index definition for the records in " + validCollection.getNamespace() + " ?", e);
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}
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log.debug("found props: " + recordProperties);
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if (recordProperties.containsKey(ID)) {
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final DBObject obj = buildDBObject(record, recordProperties, indexRecordField);
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if (log.isDebugEnabled()) {
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log.debug("Saving object" + obj);
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}
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validBulkOperationList.add(new ReplaceOneModel(new BasicDBObject(ID, obj.get(ID)), obj, new UpdateOptions().upsert(true)));
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if (((validBulkOperationList.size() % bulkSize) == 0) && !validBulkOperationList.isEmpty()) {
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validCollection.bulkWrite(validBulkOperationList, writeOptions);
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validBulkOperationList.clear();
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}
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} else {
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if (discardRecords) {
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log.debug("parsed record seems invalid");
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discardRecord(record);
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}
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}
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}
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private void discardRecord(final String record) {
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discardedBulkOperationList.add(new InsertOneModel(new BasicDBObject(BODY, record)));
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if (((discardedBulkOperationList.size() % bulkSize) == 0) && !discardedBulkOperationList.isEmpty()) {
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discardedCollection.bulkWrite(discardedBulkOperationList, writeOptions);
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discardedBulkOperationList.clear();
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}
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}
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public void flushBulks() {
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//setting to journaled write concern to be sure that when the write returns everything has been flushed to disk (https://docs.mongodb.org/manual/faq/developers/#when-does-mongodb-write-updates-to-disk)
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//the explicit fsync command can't be run anymore: 'Command failed with error 13: 'fsync may only be run against the admin database.'
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if (!validBulkOperationList.isEmpty()) {
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validCollection = getCollectionWithWriteConcern(validCollection, WriteConcern.JOURNALED);
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validCollection.bulkWrite(validBulkOperationList, writeOptions);
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}
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if (!discardedBulkOperationList.isEmpty()) {
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discardedCollection = getCollectionWithWriteConcern(discardedCollection, WriteConcern.JOURNALED);
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discardedCollection.bulkWrite(discardedBulkOperationList, writeOptions);
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}
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//setting write concern back to ACKNOWLEDGE to avoid the execution of future writes all in Journaled mode
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validCollection = getCollectionWithWriteConcern(validCollection, WriteConcern.ACKNOWLEDGED);
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discardedCollection = getCollectionWithWriteConcern(discardedCollection, WriteConcern.ACKNOWLEDGED);
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}
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protected DBObject buildDBObject(final String record, final Map<String, String> recordProperties, final Map<String, List<String>> indexFieldProperties) {
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final DBObject obj = new BasicDBObject();
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obj.put(ID, recordProperties.get(ID));
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obj.put(ORIGINALID, recordProperties.get(ORIGINALID));
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obj.put(BODY, record);
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obj.put(TIMESTAMP, Long.valueOf(recordProperties.get(TIMESTAMP)));
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if (indexFieldProperties != null)
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obj.putAll(Maps.filterKeys(indexFieldProperties, new Predicate<String>() {
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//ensure we do not override the mandatory fields above with some unexpected value
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@Override
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public boolean apply(@Nullable final String s) {
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return !s.equalsIgnoreCase(ID) && !s.equalsIgnoreCase(ORIGINALID) && !s.equalsIgnoreCase(BODY) && !s.equalsIgnoreCase(TIMESTAMP);
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}
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}));
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return obj;
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}
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private MongoCollection<DBObject> getCollectionWithWriteConcern(MongoCollection<DBObject> collection, WriteConcern writeConcern) {
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return collection.withWriteConcern(writeConcern);
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}
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andrea.man
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}
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