| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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 org.apache.hudi.table.action.compact.strategy; |
| |
| import org.apache.hudi.avro.model.HoodieCompactionOperation; |
| import org.apache.hudi.avro.model.HoodieCompactionPlan; |
| import org.apache.hudi.config.HoodieWriteConfig; |
| |
| import java.text.SimpleDateFormat; |
| import java.util.Calendar; |
| import java.util.Comparator; |
| import java.util.Date; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.stream.Collectors; |
| |
| /** |
| * This strategy ensures that the last N partitions are picked up even if there are later partitions created for the |
| * table. lastNPartitions is defined as the N partitions before the currentDate. currentDay = 2018/01/01 The table |
| * has partitions for 2018/02/02 and 2018/03/03 beyond the currentDay This strategy will pick up the following |
| * partitions for compaction : (2018/01/01, allPartitionsInRange[(2018/01/01 - lastNPartitions) to 2018/01/01), |
| * 2018/02/02, 2018/03/03) |
| */ |
| public class BoundedPartitionAwareCompactionStrategy extends DayBasedCompactionStrategy { |
| |
| SimpleDateFormat dateFormat = new SimpleDateFormat(DayBasedCompactionStrategy.DATE_PARTITION_FORMAT); |
| |
| @Override |
| public List<HoodieCompactionOperation> orderAndFilter(HoodieWriteConfig writeConfig, |
| List<HoodieCompactionOperation> operations, List<HoodieCompactionPlan> pendingCompactionPlans) { |
| // The earliest partition to compact - current day minus the target partitions limit |
| String earliestPartitionPathToCompact = |
| dateFormat.format(getDateAtOffsetFromToday(-1 * writeConfig.getTargetPartitionsPerDayBasedCompaction())); |
| // Filter out all partitions greater than earliestPartitionPathToCompact |
| |
| return operations.stream().collect(Collectors.groupingBy(HoodieCompactionOperation::getPartitionPath)).entrySet() |
| .stream().sorted(Map.Entry.comparingByKey(DayBasedCompactionStrategy.comparator)) |
| .filter(e -> DayBasedCompactionStrategy.comparator.compare(earliestPartitionPathToCompact, e.getKey()) >= 0) |
| .flatMap(e -> e.getValue().stream()).collect(Collectors.toList()); |
| } |
| |
| @Override |
| public List<String> filterPartitionPaths(HoodieWriteConfig writeConfig, List<String> partitionPaths) { |
| // The earliest partition to compact - current day minus the target partitions limit |
| String earliestPartitionPathToCompact = |
| dateFormat.format(getDateAtOffsetFromToday(-1 * writeConfig.getTargetPartitionsPerDayBasedCompaction())); |
| // Get all partitions and sort them |
| return partitionPaths.stream().map(partition -> partition.replace("/", "-")) |
| .sorted(Comparator.reverseOrder()).map(partitionPath -> partitionPath.replace("-", "/")) |
| .filter(e -> DayBasedCompactionStrategy.comparator.compare(earliestPartitionPathToCompact, e) >= 0).collect(Collectors.toList()); |
| } |
| |
| public static Date getDateAtOffsetFromToday(int offset) { |
| Calendar calendar = Calendar.getInstance(); |
| calendar.add(Calendar.DATE, offset); |
| return calendar.getTime(); |
| } |
| } |