| /* |
| * 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 org.apache.hudi.exception.HoodieException; |
| |
| import java.text.ParseException; |
| import java.text.SimpleDateFormat; |
| import java.util.Comparator; |
| import java.util.Date; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.Map; |
| import java.util.stream.Collectors; |
| |
| /** |
| * This strategy orders compactions in reverse order of creation of Hive Partitions. It helps to compact data in latest |
| * partitions first and then older capped at the Total_IO allowed. |
| */ |
| public class DayBasedCompactionStrategy extends CompactionStrategy { |
| |
| // For now, use SimpleDateFormat as default partition format |
| protected static final String DATE_PARTITION_FORMAT = "yyyy/MM/dd"; |
| // Sorts compaction in LastInFirstCompacted order |
| protected static Comparator<String> comparator = (String leftPartition, String rightPartition) -> { |
| try { |
| leftPartition = getPartitionPathWithoutPartitionKeys(leftPartition); |
| rightPartition = getPartitionPathWithoutPartitionKeys(rightPartition); |
| Date left = new SimpleDateFormat(DATE_PARTITION_FORMAT, Locale.ENGLISH).parse(leftPartition); |
| Date right = new SimpleDateFormat(DATE_PARTITION_FORMAT, Locale.ENGLISH).parse(rightPartition); |
| return left.after(right) ? -1 : right.after(left) ? 1 : 0; |
| } catch (ParseException e) { |
| throw new HoodieException("Invalid Partition Date Format", e); |
| } |
| }; |
| |
| public Comparator<String> getComparator() { |
| return comparator; |
| } |
| |
| @Override |
| public List<HoodieCompactionOperation> orderAndFilter(HoodieWriteConfig writeConfig, |
| List<HoodieCompactionOperation> operations, List<HoodieCompactionPlan> pendingCompactionPlans) { |
| // Iterate through the operations and accept operations as long as we are within the configured target partitions |
| // limit |
| return operations.stream() |
| .collect(Collectors.groupingBy(HoodieCompactionOperation::getPartitionPath)).entrySet().stream() |
| .sorted(Map.Entry.comparingByKey(comparator)).limit(writeConfig.getTargetPartitionsPerDayBasedCompaction()) |
| .flatMap(e -> e.getValue().stream()).collect(Collectors.toList()); |
| } |
| |
| @Override |
| public List<String> filterPartitionPaths(HoodieWriteConfig writeConfig, List<String> allPartitionPaths) { |
| return allPartitionPaths.stream().map(partition -> partition.replace("/", "-")) |
| .sorted(Comparator.reverseOrder()).map(partitionPath -> partitionPath.replace("-", "/")) |
| .collect(Collectors.toList()).subList(0, writeConfig.getTargetPartitionsPerDayBasedCompaction()); |
| } |
| |
| /** |
| * If is Hive style partition path, convert it to regular partition path. e.g. year=2019/month=11/day=24 => 2019/11/24 |
| */ |
| protected static String getPartitionPathWithoutPartitionKeys(String partitionPath) { |
| if (partitionPath.contains("=")) { |
| return partitionPath.replaceFirst(".*?=", "").replaceAll("/.*?=", "/"); |
| } |
| return partitionPath; |
| } |
| } |