| /* |
| * 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.flink; |
| |
| import org.apache.tsfile.enums.TSDataType; |
| import org.apache.tsfile.file.metadata.enums.TSEncoding; |
| import org.apache.tsfile.fileSystem.FSFactoryProducer; |
| import org.apache.tsfile.read.TsFileReader; |
| import org.apache.tsfile.read.TsFileSequenceReader; |
| import org.apache.tsfile.read.common.Path; |
| import org.apache.tsfile.read.common.RowRecord; |
| import org.apache.tsfile.read.expression.QueryExpression; |
| import org.apache.tsfile.read.query.dataset.QueryDataSet; |
| import org.apache.tsfile.write.TsFileWriter; |
| import org.apache.tsfile.write.record.TSRecord; |
| import org.apache.tsfile.write.record.datapoint.DataPoint; |
| import org.apache.tsfile.write.record.datapoint.LongDataPoint; |
| import org.apache.tsfile.write.schema.MeasurementSchema; |
| import org.apache.tsfile.write.schema.Schema; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.file.Files; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.stream.Collectors; |
| |
| /** Utils used to prepare source TsFiles for the examples. */ |
| public class TsFileUtils { |
| |
| private static final Logger LOGGER = LoggerFactory.getLogger(TsFileUtils.class); |
| private static final String DEFAULT_TEMPLATE = "template"; |
| |
| private TsFileUtils() {} |
| |
| public static void writeTsFile(String path) { |
| try { |
| File f = FSFactoryProducer.getFSFactory().getFile(path); |
| Files.delete(f.toPath()); |
| Schema schema = new Schema(); |
| schema.extendTemplate( |
| DEFAULT_TEMPLATE, new MeasurementSchema("sensor_1", TSDataType.FLOAT, TSEncoding.RLE)); |
| schema.extendTemplate( |
| DEFAULT_TEMPLATE, |
| new MeasurementSchema("sensor_2", TSDataType.INT32, TSEncoding.TS_2DIFF)); |
| schema.extendTemplate( |
| DEFAULT_TEMPLATE, |
| new MeasurementSchema("sensor_3", TSDataType.INT32, TSEncoding.TS_2DIFF)); |
| |
| try (TsFileWriter tsFileWriter = new TsFileWriter(f, schema)) { |
| |
| // construct TSRecord |
| for (int i = 0; i < 100; i++) { |
| TSRecord tsRecord = new TSRecord(i, "device_" + (i % 4)); |
| DataPoint dPoint1 = new LongDataPoint("sensor_1", i); |
| DataPoint dPoint2 = new LongDataPoint("sensor_2", i); |
| DataPoint dPoint3 = new LongDataPoint("sensor_3", i); |
| tsRecord.addTuple(dPoint1); |
| tsRecord.addTuple(dPoint2); |
| tsRecord.addTuple(dPoint3); |
| |
| // write TSRecord |
| tsFileWriter.write(tsRecord); |
| } |
| } |
| |
| } catch (Exception e) { |
| LOGGER.error("Write {} failed. ", path, e); |
| } |
| } |
| |
| public static String[] readTsFile(String tsFilePath, List<Path> paths) throws IOException { |
| QueryExpression expression = QueryExpression.create(paths, null); |
| TsFileSequenceReader reader = new TsFileSequenceReader(tsFilePath); |
| try (TsFileReader readTsFile = new TsFileReader(reader)) { |
| QueryDataSet queryDataSet = readTsFile.query(expression); |
| List<String> result = new ArrayList<>(); |
| while (queryDataSet.hasNext()) { |
| RowRecord rowRecord = queryDataSet.next(); |
| String row = |
| rowRecord.getFields().stream() |
| .map(f -> f == null ? "null" : f.getStringValue()) |
| .collect(Collectors.joining(",")); |
| result.add(rowRecord.getTimestamp() + "," + row); |
| } |
| return result.toArray(new String[0]); |
| } |
| } |
| } |