jt2594838 commented on a change in pull request #372: [IOTDB-198]Reimplementation sync module URL: https://github.com/apache/incubator-iotdb/pull/372#discussion_r321667507
########## File path: server/src/main/java/org/apache/iotdb/db/sync/receiver/transfer/SyncServiceImpl.java ########## @@ -0,0 +1,343 @@ +/** + * 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.sync.receiver.transfer; + +import java.io.BufferedReader; +import java.io.File; +import java.io.FileOutputStream; +import java.io.IOException; +import java.math.BigInteger; +import java.nio.ByteBuffer; +import java.nio.channels.FileChannel; +import java.security.MessageDigest; +import java.security.NoSuchAlgorithmException; +import java.util.Collections; +import java.util.HashMap; +import java.util.Map; +import org.apache.iotdb.db.concurrent.ThreadName; +import org.apache.iotdb.db.conf.IoTDBConfig; +import org.apache.iotdb.db.conf.IoTDBDescriptor; +import org.apache.iotdb.db.conf.directories.DirectoryManager; +import org.apache.iotdb.db.engine.storagegroup.TsFileResource; +import org.apache.iotdb.db.exception.DiskSpaceInsufficientException; +import org.apache.iotdb.db.exception.MetadataErrorException; +import org.apache.iotdb.db.exception.PathErrorException; +import org.apache.iotdb.db.metadata.MManager; +import org.apache.iotdb.db.metadata.MetadataConstant; +import org.apache.iotdb.db.metadata.MetadataOperationType; +import org.apache.iotdb.db.sync.receiver.load.FileLoader; +import org.apache.iotdb.db.sync.receiver.load.FileLoaderManager; +import org.apache.iotdb.db.sync.receiver.recover.SyncReceiverLogAnalyzer; +import org.apache.iotdb.db.sync.receiver.recover.SyncReceiverLogger; +import org.apache.iotdb.db.sync.sender.conf.SyncConstant; +import org.apache.iotdb.db.utils.FilePathUtils; +import org.apache.iotdb.db.utils.SyncUtils; +import org.apache.iotdb.service.sync.thrift.ResultStatus; +import org.apache.iotdb.service.sync.thrift.SyncService; +import org.apache.iotdb.tsfile.file.metadata.enums.CompressionType; +import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; +import org.apache.iotdb.tsfile.file.metadata.enums.TSEncoding; +import org.apache.iotdb.tsfile.read.common.Path; +import org.apache.thrift.TException; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class SyncServiceImpl implements SyncService.Iface { + + private static final Logger logger = LoggerFactory.getLogger(SyncServiceImpl.class); + + private IoTDBConfig config = IoTDBDescriptor.getInstance().getConfig(); + + private ThreadLocal<String> syncFolderPath = new ThreadLocal<>(); + + private ThreadLocal<String> currentSG = new ThreadLocal<>(); + + private ThreadLocal<SyncReceiverLogger> syncLog = new ThreadLocal<>(); + + private ThreadLocal<String> senderName = new ThreadLocal<>(); + + private ThreadLocal<File> currentFile = new ThreadLocal<>(); + + private ThreadLocal<FileChannel> currentFileWriter = new ThreadLocal<>(); + + private ThreadLocal<MessageDigest> messageDigest = new ThreadLocal<>(); + + /** + * Verify IP address of sender + */ + @Override + public ResultStatus check(String ipAddress, String uuid) { + Thread.currentThread().setName(ThreadName.SYNC_SERVER.getName()); + if (SyncUtils.verifyIPSegment(config.getIpWhiteList(), ipAddress)) { + senderName.set(ipAddress + SyncConstant.SYNC_DIR_NAME_SEPARATOR + uuid); + if (checkRecovery()) { + logger.info("Start to sync with sender {}", senderName.get()); + return getSuccessResult(); + } else { + return getErrorResult("Receiver is processing data from previous sync tasks"); + } + } else { + return getErrorResult( + "Sender IP is not in the white list of receiver IP and synchronization tasks are not allowed."); + } + } + + private boolean checkRecovery() { + try { + if (currentFileWriter.get() != null && currentFileWriter.get().isOpen()) { + currentFileWriter.get().close(); + } + if (syncLog.get() != null) { + syncLog.get().close(); + } + return SyncReceiverLogAnalyzer.getInstance().recover(senderName.get()); + } catch (IOException e) { + logger.error("Check recovery state fail", e); + return false; + } + } + + @Override + public ResultStatus startSync() { + try { + initPath(); + currentSG.remove(); + FileLoader.createFileLoader(senderName.get(), syncFolderPath.get()); + syncLog.set(new SyncReceiverLogger(new File(syncFolderPath.get(), SyncConstant.SYNC_LOG_NAME))); + return getSuccessResult(); + } catch (DiskSpaceInsufficientException | IOException e) { + logger.error("Can not receiver data from sender", e); + return getErrorResult(e.getMessage()); + } + } + + /** + * Init file path and clear data if last sync process failed. + */ + private void initPath() throws DiskSpaceInsufficientException { + String dataDir = new File(DirectoryManager.getInstance().getNextFolderForSequenceFile()) + .getParentFile().getAbsolutePath(); + syncFolderPath + .set(FilePathUtils.regularizePath(dataDir) + SyncConstant.SYNC_RECEIVER + File.separatorChar + + senderName.get()); + } + + /** + * Init threadLocal variable and delete old useless files. + */ + @Override + public ResultStatus init(String storageGroup) { + logger.info("Sync process started to receive data of storage group {}", storageGroup); + currentSG.set(storageGroup); + try { + syncLog.get().startSyncDeletedFilesName(); + } catch (IOException e) { + logger.error("Can not init sync process", e); + return getErrorResult(e.getMessage()); + } + return getSuccessResult(); + } + + @Override + public ResultStatus syncDeletedFileName(String fileName) throws TException { + try { + syncLog.get().finishSyncDeletedFileName(new File(fileName)); + FileLoaderManager.getInstance().getFileLoader(senderName.get()) + .addDeletedFileName(new File(fileName)); + } catch (IOException e) { + logger.error("Can not sync deleted file", e); + return getErrorResult( + String.format("Can not sync deleted file %s because %s", fileName, e.getMessage())); + } + return getSuccessResult(); + } + + @Override + public ResultStatus initSyncData(String filename) throws TException { + try { + File file; + if (currentSG.get() == null) { // schema mlog.txt file + file = new File(getSyncDataPath(), filename); + } else { + file = new File(getSyncDataPath(), currentSG.get() + File.separatorChar + filename); + } + file.delete(); + currentFile.set(file); + if (!file.getParentFile().exists()) { + file.getParentFile().mkdirs(); + } + if (currentFileWriter.get() != null && currentFileWriter.get().isOpen()) { + currentFileWriter.get().close(); + } + currentFileWriter.set(new FileOutputStream(file).getChannel()); + syncLog.get().startSyncTsFiles(); + messageDigest.set(MessageDigest.getInstance(SyncConstant.MESSAGE_DIGIT_NAME)); + } catch (IOException | NoSuchAlgorithmException e) { + logger.error("Can not init sync resource for file {}", filename, e); + return getErrorResult( + String.format("Can not init sync resource for file %s because %s", filename, + e.getMessage())); + } + return getSuccessResult(); + } + + @Override + public ResultStatus syncData(ByteBuffer buff) { + try { + currentFileWriter.get().write(buff); + buff.flip(); + messageDigest.get().update(buff); + } catch (IOException e) { + logger.error("Can not sync data for file {}", currentFile.get().getAbsoluteFile(), e); + return getErrorResult(String + .format("Can not sync data for file %s because %s", currentFile.get().getName(), + e.getMessage())); + } + return getSuccessResult(); + } + + @Override + public ResultStatus checkDataMD5(String md5OfSender) throws TException { + String md5OfReceiver = (new BigInteger(1, messageDigest.get().digest())).toString(16); + try { + if (currentFileWriter.get() != null && currentFileWriter.get().isOpen()) { + currentFileWriter.get().close(); + } + if (!md5OfSender.equals(md5OfReceiver)) { + currentFile.get().delete(); + currentFileWriter.set(new FileOutputStream(currentFile.get()).getChannel()); + } else { + if (currentFile.get().getName().endsWith(MetadataConstant.METADATA_LOG)) { + loadMetadata(); + } else { + if (!currentFile.get().getName().endsWith(TsFileResource.RESOURCE_SUFFIX)) { + logger.info("Receiver has received {} successfully.", currentFile.get()); + syncLog.get().finishSyncTsfile(currentFile.get()); + FileLoaderManager.getInstance().getFileLoader(senderName.get()) + .addTsfile(currentFile.get()); + } + } + } + } catch (IOException e) { + logger.error("Can not check data MD5 for file {}", currentFile.get().getAbsoluteFile(), e); + return getErrorResult(String + .format("Can not check data MD5 for file %s because %s", currentFile.get().getName(), + e.getMessage())); + } + return new ResultStatus(true, null, md5OfReceiver); + } + + private boolean loadMetadata() { + logger.info("Start to load metadata in sync process."); + if (currentFile.get().exists()) { + try (BufferedReader br = new BufferedReader( + new java.io.FileReader(currentFile.get()))) { + String metadataOperation; + while ((metadataOperation = br.readLine()) != null) { + try { + operation(metadataOperation); + } catch (IOException | MetadataErrorException | PathErrorException e) { + // multiple insert schema, ignore it. + } + } + } catch (IOException e) { + logger.error("Cannot read the file {}.", currentFile.get().getAbsoluteFile(), e); + return false; + } + } + return true; + } + + /** + * Operate metadata operation in MManager + * + * @param cmd metadata operation + */ + private void operation(String cmd) Review comment: This method seems similar to the one in MGraph, maybe you can extract it. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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