/*
* Licensed to STRATIO (C) under one or more contributor license agreements.
* See the NOTICE file distributed with this work for additional information
* regarding copyright ownership. The STRATIO (C) 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 com.stratio.cassandra.lucene;
import org.apache.cassandra.db.Clustering;
import org.apache.cassandra.db.DecoratedKey;
import org.apache.cassandra.db.rows.Row;
import org.apache.cassandra.index.transactions.IndexTransaction;
import org.apache.cassandra.utils.concurrent.OpOrder;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.NavigableSet;
import java.util.Optional;
/**
* {@link IndexWriter} for wide rows.
*
* @author Andres de la Pena {@literal <adelapena@stratio.com>}
*/
public class IndexWriterWide extends IndexWriter {
private final NavigableSet<Clustering> rowsToRead;
private final Map<Clustering, Optional<Row>> rows;
/**
* Builds a new {@link IndexWriter} for tables with wide rows.
*
* @param service the service to perform the indexing operation
* @param key key of the partition being modified
* @param nowInSec current time of the update operation
* @param opGroup operation group spanning the update operation
* @param transactionType what kind of update is being performed on the base data
*/
public IndexWriterWide(IndexServiceWide service,
DecoratedKey key,
int nowInSec,
OpOrder.Group opGroup,
IndexTransaction.Type transactionType) {
super(service, key, nowInSec, opGroup, transactionType);
rowsToRead = service.clusterings();
rows = new LinkedHashMap<>();
}
/** {@inheritDoc} */
@Override
protected void delete() {
service.delete(key);
rowsToRead.clear();
rows.clear();
}
/** {@inheritDoc} */
@Override
protected void index(Row row) {
if (!row.isStatic()) {
Clustering clustering = row.clustering();
if (service.needsReadBeforeWrite(key, row)) {
rowsToRead.add(clustering);
rows.put(clustering, Optional.empty());
} else {
rows.put(clustering, Optional.of(row));
}
}
}
/** {@inheritDoc} */
@Override
public void finish() {
// Read required rows from storage engine
service.read(key, rowsToRead, nowInSec, opGroup).forEachRemaining(unfiltered -> {
Row row = (Row) unfiltered;
rows.put(row.clustering(), Optional.of(row));
});
// Write rows
rows.forEach((clustering, optional) -> optional.ifPresent(row -> {
if (row.hasLiveData(nowInSec)) {
service.upsert(key, row);
} else {
service.delete(key, row);
}
}));
}
}