| /* |
| * 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.iotdb.db.pipe.extractor.dataregion.realtime.listener; |
| |
| import org.apache.iotdb.db.pipe.extractor.dataregion.realtime.PipeRealtimeDataRegionExtractor; |
| |
| import org.apache.tsfile.utils.Pair; |
| import org.checkerframework.checker.nullness.qual.NonNull; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| public class PipeTimePartitionListener { |
| |
| private final Map<String, Map<String, PipeRealtimeDataRegionExtractor>> dataRegionId2Extractors = |
| new ConcurrentHashMap<>(); |
| |
| // This variable is used to record the upper and lower bounds that each data region's time |
| // partition ID has ever reached. |
| private final Map<String, Pair<Long, Long>> dataRegionId2TimePartitionIdBound = |
| new ConcurrentHashMap<>(); |
| |
| //////////////////////////// start & stop //////////////////////////// |
| |
| public synchronized void startListen( |
| String dataRegionId, PipeRealtimeDataRegionExtractor extractor) { |
| dataRegionId2Extractors |
| .computeIfAbsent(dataRegionId, o -> new HashMap<>()) |
| .put(extractor.getTaskID(), extractor); |
| // Assign the previously recorded upper and lower bounds of time partition to the extractor that |
| // has just started listening to the growth of time partition. |
| Pair<Long, Long> timePartitionIdBound = dataRegionId2TimePartitionIdBound.get(dataRegionId); |
| if (Objects.nonNull(timePartitionIdBound)) { |
| extractor.setDataRegionTimePartitionIdBound(timePartitionIdBound); |
| } |
| } |
| |
| public synchronized void stopListen( |
| String dataRegionId, PipeRealtimeDataRegionExtractor extractor) { |
| Map<String, PipeRealtimeDataRegionExtractor> extractors = |
| dataRegionId2Extractors.get(dataRegionId); |
| if (Objects.isNull(extractors)) { |
| return; |
| } |
| extractors.remove(extractor.getTaskID()); |
| if (extractors.isEmpty()) { |
| dataRegionId2Extractors.remove(dataRegionId); |
| } |
| } |
| |
| //////////////////////////// listen to changes //////////////////////////// |
| |
| public synchronized void listenToTimePartitionGrow( |
| String dataRegionId, @NonNull Pair<Long, Long> newTimePartitionIdBound) { |
| boolean shouldBroadcastTimePartitionChange = false; |
| Pair<Long, Long> oldTimePartitionIdBound = dataRegionId2TimePartitionIdBound.get(dataRegionId); |
| |
| if (Objects.isNull(oldTimePartitionIdBound)) { |
| dataRegionId2TimePartitionIdBound.put(dataRegionId, newTimePartitionIdBound); |
| shouldBroadcastTimePartitionChange = true; |
| } else if (newTimePartitionIdBound.left < oldTimePartitionIdBound.left |
| || oldTimePartitionIdBound.right < newTimePartitionIdBound.right) { |
| dataRegionId2TimePartitionIdBound.put( |
| dataRegionId, |
| new Pair<>( |
| Math.min(oldTimePartitionIdBound.left, newTimePartitionIdBound.left), |
| Math.max(oldTimePartitionIdBound.right, newTimePartitionIdBound.right))); |
| shouldBroadcastTimePartitionChange = true; |
| } |
| |
| if (shouldBroadcastTimePartitionChange) { |
| Map<String, PipeRealtimeDataRegionExtractor> extractors = |
| dataRegionId2Extractors.get(dataRegionId); |
| if (Objects.isNull(extractors)) { |
| return; |
| } |
| Pair<Long, Long> timePartitionIdBound = dataRegionId2TimePartitionIdBound.get(dataRegionId); |
| extractors.forEach( |
| (id, extractor) -> extractor.setDataRegionTimePartitionIdBound(timePartitionIdBound)); |
| } |
| } |
| |
| //////////////////////////// singleton //////////////////////////// |
| |
| private static class PipeTimePartitionListenerHolder { |
| |
| private static final PipeTimePartitionListener INSTANCE = new PipeTimePartitionListener(); |
| |
| private PipeTimePartitionListenerHolder() { |
| // empty constructor |
| } |
| } |
| |
| public static PipeTimePartitionListener getInstance() { |
| return PipeTimePartitionListener.PipeTimePartitionListenerHolder.INSTANCE; |
| } |
| |
| private PipeTimePartitionListener() { |
| // empty constructor |
| } |
| } |