| /* |
| * 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.tsfile.write.writer; |
| |
| import org.apache.iotdb.tsfile.exception.write.TsFileNotCompleteException; |
| import org.apache.iotdb.tsfile.file.metadata.ChunkGroupMetadata; |
| import org.apache.iotdb.tsfile.file.metadata.ChunkMetadata; |
| import org.apache.iotdb.tsfile.file.metadata.IDeviceID; |
| import org.apache.iotdb.tsfile.file.metadata.TsFileMetadata; |
| import org.apache.iotdb.tsfile.fileSystem.FSFactoryProducer; |
| import org.apache.iotdb.tsfile.read.TsFileSequenceReader; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * ForceAppendTsFileWriter opens a COMPLETE TsFile, reads and truncate its metadata to support |
| * appending new data. |
| */ |
| public class ForceAppendTsFileWriter extends TsFileIOWriter { |
| |
| private long truncatePosition; |
| private static Logger logger = LoggerFactory.getLogger(ForceAppendTsFileWriter.class); |
| |
| public ForceAppendTsFileWriter(File file) throws IOException { |
| if (logger.isDebugEnabled()) { |
| logger.debug("{} writer is opened.", file.getName()); |
| } |
| this.out = FSFactoryProducer.getFileOutputFactory().getTsFileOutput(file.getPath(), true); |
| this.file = file; |
| |
| // file doesn't exist |
| if (file.length() == 0 || !file.exists()) { |
| throw new TsFileNotCompleteException("File " + file.getPath() + " is not a complete TsFile"); |
| } |
| |
| try (TsFileSequenceReader reader = new TsFileSequenceReader(file.getAbsolutePath(), true)) { |
| |
| // this tsfile is not complete |
| if (!reader.isComplete()) { |
| throw new TsFileNotCompleteException( |
| "File " + file.getPath() + " is not a complete TsFile"); |
| } |
| TsFileMetadata tsFileMetadata = reader.readFileMetadata(); |
| // truncate metadata and marker |
| truncatePosition = tsFileMetadata.getMetaOffset(); |
| |
| canWrite = true; |
| List<IDeviceID> devices = reader.getAllDevices(); |
| for (IDeviceID device : devices) { |
| List<ChunkMetadata> chunkMetadataList = new ArrayList<>(); |
| reader.readChunkMetadataInDevice(device).values().forEach(chunkMetadataList::addAll); |
| ChunkGroupMetadata chunkGroupMetadata = new ChunkGroupMetadata(device, chunkMetadataList); |
| chunkGroupMetadataList.add(chunkGroupMetadata); |
| } |
| } |
| } |
| |
| public void doTruncate() throws IOException { |
| out.truncate(truncatePosition); |
| } |
| |
| public long getTruncatePosition() { |
| return truncatePosition; |
| } |
| } |