| /* |
| * 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.storageengine.dataregion.memtable; |
| |
| import org.apache.iotdb.commons.path.PartialPath; |
| import org.apache.iotdb.commons.utils.TestOnly; |
| import org.apache.iotdb.db.queryengine.plan.analyze.cache.schema.DataNodeDevicePathCache; |
| import org.apache.iotdb.tsfile.file.metadata.IDeviceID; |
| import org.apache.iotdb.tsfile.file.metadata.PlainDeviceID; |
| |
| import java.util.function.Function; |
| |
| /** factory to build device id according to configured algorithm */ |
| public class DeviceIDFactory { |
| private Function<String, IDeviceID> getDeviceIDFunction; |
| |
| // region DeviceIDFactory Singleton |
| private static class DeviceIDFactoryHolder { |
| |
| private DeviceIDFactoryHolder() { |
| // allowed to do nothing |
| } |
| |
| private static final DeviceIDFactory INSTANCE = new DeviceIDFactory(); |
| } |
| |
| /** |
| * get instance |
| * |
| * @return instance of the factory |
| */ |
| public static DeviceIDFactory getInstance() { |
| return DeviceIDFactoryHolder.INSTANCE; |
| } |
| |
| private DeviceIDFactory() { |
| getDeviceIDFunction = PlainDeviceID::new; |
| } |
| // endregion |
| |
| /** |
| * get device id by full path |
| * |
| * @param devicePath device path of the timeseries |
| * @return device id of the timeseries |
| */ |
| public IDeviceID getDeviceID(PartialPath devicePath) { |
| return getDeviceIDFunction.apply(devicePath.getFullPath()); |
| } |
| |
| /** |
| * get device id by full path |
| * |
| * @param devicePath device path of the timeseries |
| * @return device id of the timeseries |
| */ |
| public IDeviceID getDeviceID(String devicePath) { |
| return getDeviceIDFunction.apply(DataNodeDevicePathCache.getInstance().getDeviceId(devicePath)); |
| } |
| |
| /** reset id method */ |
| @TestOnly |
| public void reset() { |
| getDeviceIDFunction = PlainDeviceID::new; |
| } |
| } |