| /* |
| * 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.service; |
| |
| import org.apache.iotdb.commons.exception.StartupException; |
| import org.apache.iotdb.commons.file.SystemFileFactory; |
| import org.apache.iotdb.commons.service.IService; |
| import org.apache.iotdb.commons.service.ServiceType; |
| import org.apache.iotdb.db.conf.IoTDBDescriptor; |
| import org.apache.iotdb.db.mpp.transformation.datastructure.SerializableList.SerializationRecorder; |
| |
| import org.apache.commons.io.FileUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| public class TemporaryQueryDataFileService implements IService { |
| |
| private static final Logger logger = LoggerFactory.getLogger(TemporaryQueryDataFileService.class); |
| |
| private static final String TEMPORARY_FILE_DIR = |
| IoTDBDescriptor.getInstance().getConfig().getSystemDir() |
| + File.separator |
| + "udf" |
| + File.separator |
| + "tmp"; |
| |
| private final AtomicLong uniqueDataId; |
| private final Map<Long, List<SerializationRecorder>> recorders; |
| |
| private TemporaryQueryDataFileService() { |
| uniqueDataId = new AtomicLong(0); |
| recorders = new ConcurrentHashMap<>(); |
| } |
| |
| public String register(SerializationRecorder recorder) throws IOException { |
| long queryId = recorder.getQueryId(); |
| if (!recorders.containsKey(queryId)) { |
| recorders.put(queryId, new ArrayList<>()); |
| } |
| recorders.get(queryId).add(recorder); |
| |
| String dirName = getDirName(queryId); |
| makeDirIfNecessary(dirName); |
| return getFileName(dirName, uniqueDataId.getAndIncrement()); |
| } |
| |
| public void deregister(long queryId) { |
| List<SerializationRecorder> recorderList = recorders.remove(queryId); |
| if (recorderList == null) { |
| return; |
| } |
| for (SerializationRecorder recorder : recorderList) { |
| try { |
| recorder.closeFile(); |
| } catch (IOException e) { |
| logger.warn( |
| String.format("Failed to close file in method deregister(%d), because %s", queryId, e)); |
| } |
| } |
| try { |
| FileUtils.cleanDirectory(SystemFileFactory.INSTANCE.getFile(getDirName(queryId))); |
| } catch (IOException e) { |
| logger.warn( |
| String.format("Failed to clean dir in method deregister(%d), because %s", queryId, e)); |
| } |
| } |
| |
| private void makeDirIfNecessary(String dir) throws IOException { |
| File file = SystemFileFactory.INSTANCE.getFile(dir); |
| if (file.exists() && file.isDirectory()) { |
| return; |
| } |
| FileUtils.forceMkdir(file); |
| } |
| |
| private String getDirName(long queryId) { |
| return TEMPORARY_FILE_DIR + File.separator + queryId + File.separator; |
| } |
| |
| private String getFileName(String dir, long index) { |
| return dir + index; |
| } |
| |
| @Override |
| public void start() throws StartupException { |
| try { |
| makeDirIfNecessary(TEMPORARY_FILE_DIR); |
| } catch (IOException e) { |
| throw new StartupException(e); |
| } |
| } |
| |
| @Override |
| public void stop() { |
| for (Object queryId : recorders.keySet().toArray()) { |
| deregister((Long) queryId); |
| } |
| } |
| |
| @Override |
| public ServiceType getID() { |
| return ServiceType.TEMPORARY_QUERY_DATA_FILE_SERVICE; |
| } |
| |
| public static TemporaryQueryDataFileService getInstance() { |
| return TemporaryQueryDataFileServiceHelper.INSTANCE; |
| } |
| |
| private static class TemporaryQueryDataFileServiceHelper { |
| |
| private static final TemporaryQueryDataFileService INSTANCE = |
| new TemporaryQueryDataFileService(); |
| |
| private TemporaryQueryDataFileServiceHelper() {} |
| } |
| } |