| /* |
| * 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.localconfignode; |
| |
| import org.apache.iotdb.commons.consensus.SchemaRegionId; |
| import org.apache.iotdb.commons.exception.MetadataException; |
| import org.apache.iotdb.commons.path.PartialPath; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| // This class is used for schema partition maintaining the map between storage group and |
| // schemaRegionIds. |
| public class LocalSchemaPartitionTable { |
| |
| private AtomicInteger schemaRegionIdGenerator; |
| |
| private Map<PartialPath, List<SchemaRegionId>> table; |
| |
| private static class LocalSchemaPartitionTableHolder { |
| private static final LocalSchemaPartitionTable INSTANCE = new LocalSchemaPartitionTable(); |
| |
| private LocalSchemaPartitionTableHolder() {}; |
| } |
| |
| private LocalSchemaPartitionTable() {} |
| |
| public static LocalSchemaPartitionTable getInstance() { |
| return LocalSchemaPartitionTableHolder.INSTANCE; |
| } |
| |
| public synchronized void init( |
| Map<PartialPath, List<SchemaRegionId>> recoveredLocalSchemaRegionInfo) |
| throws MetadataException { |
| table = new ConcurrentHashMap<>(); |
| schemaRegionIdGenerator = new AtomicInteger(0); |
| for (PartialPath storageGroup : recoveredLocalSchemaRegionInfo.keySet()) { |
| List<SchemaRegionId> schemaRegionIdList = new CopyOnWriteArrayList<>(); |
| table.put(storageGroup, schemaRegionIdList); |
| for (SchemaRegionId schemaRegionId : recoveredLocalSchemaRegionInfo.get(storageGroup)) { |
| schemaRegionIdList.add(schemaRegionId); |
| |
| if (schemaRegionId.getId() >= schemaRegionIdGenerator.get()) { |
| schemaRegionIdGenerator.set(schemaRegionId.getId() + 1); |
| } |
| } |
| } |
| } |
| |
| public synchronized void clear() { |
| if (table != null) { |
| table.clear(); |
| table = null; |
| } |
| |
| if (schemaRegionIdGenerator != null) { |
| schemaRegionIdGenerator = null; |
| } |
| } |
| |
| public SchemaRegionId getSchemaRegionId(PartialPath storageGroup, PartialPath path) { |
| if (!table.containsKey(storageGroup)) { |
| return null; |
| } |
| return calculateSchemaRegionId(storageGroup, path); |
| } |
| |
| public List<SchemaRegionId> getInvolvedSchemaRegionIds( |
| PartialPath storageGroup, PartialPath pathPattern, boolean isPrefixMatch) { |
| List<SchemaRegionId> result = new ArrayList<>(); |
| if (table.containsKey(storageGroup)) { |
| result.addAll(table.get(storageGroup)); |
| } |
| return result; |
| } |
| |
| public List<SchemaRegionId> getSchemaRegionIdsByStorageGroup(PartialPath storageGroup) { |
| return new ArrayList<>(table.get(storageGroup)); |
| } |
| |
| public synchronized List<SchemaRegionId> setStorageGroup(PartialPath storageGroup) { |
| if (table.containsKey(storageGroup)) { |
| return table.get(storageGroup); |
| } |
| List<SchemaRegionId> schemaRegionIdList = new CopyOnWriteArrayList<>(); |
| schemaRegionIdList.add(new SchemaRegionId(schemaRegionIdGenerator.getAndIncrement())); |
| table.put(storageGroup, schemaRegionIdList); |
| return schemaRegionIdList; |
| } |
| |
| public synchronized List<SchemaRegionId> deleteStorageGroup(PartialPath storageGroup) { |
| return table.remove(storageGroup); |
| } |
| |
| // This method may be extended to implement multi schemaRegion for one storageGroup |
| // todo keep consistent with the partition method of config node in new cluster |
| private SchemaRegionId calculateSchemaRegionId(PartialPath storageGroup, PartialPath path) { |
| return table.get(storageGroup).get(0); |
| } |
| } |