| /* |
| * 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.pipe.processor.downsampling.tumbling; |
| |
| import org.apache.iotdb.db.pipe.processor.downsampling.DownSamplingProcessor; |
| import org.apache.iotdb.db.pipe.processor.downsampling.PartialPathLastObjectCache; |
| import org.apache.iotdb.db.utils.TimestampPrecisionUtils; |
| import org.apache.iotdb.pipe.api.access.Row; |
| import org.apache.iotdb.pipe.api.collector.RowCollector; |
| import org.apache.iotdb.pipe.api.customizer.configuration.PipeProcessorRuntimeConfiguration; |
| import org.apache.iotdb.pipe.api.customizer.parameter.PipeParameterValidator; |
| import org.apache.iotdb.pipe.api.customizer.parameter.PipeParameters; |
| import org.apache.iotdb.tsfile.common.constant.TsFileConstant; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import static org.apache.iotdb.commons.pipe.config.constant.PipeProcessorConstant.PROCESSOR_DOWN_SAMPLING_MEMORY_LIMIT_IN_BYTES_KEY; |
| import static org.apache.iotdb.commons.pipe.config.constant.PipeProcessorConstant.PROCESSOR_DOWN_SAMPLING_SPLIT_FILE_KEY; |
| import static org.apache.iotdb.commons.pipe.config.constant.PipeProcessorConstant.PROCESSOR_TUMBLING_TIME_INTERVAL_SECONDS_DEFAULT_VALUE; |
| import static org.apache.iotdb.commons.pipe.config.constant.PipeProcessorConstant.PROCESSOR_TUMBLING_TIME_INTERVAL_SECONDS_KEY; |
| |
| public class TumblingTimeSamplingProcessor extends DownSamplingProcessor { |
| |
| private static final Logger LOGGER = LoggerFactory.getLogger(TumblingTimeSamplingProcessor.class); |
| |
| private long intervalInCurrentPrecision; |
| |
| private PartialPathLastObjectCache<Long> pathLastObjectCache; |
| |
| @Override |
| public void validate(PipeParameterValidator validator) throws Exception { |
| super.validate(validator); |
| |
| final long intervalSeconds = |
| validator |
| .getParameters() |
| .getLongOrDefault( |
| PROCESSOR_TUMBLING_TIME_INTERVAL_SECONDS_KEY, |
| PROCESSOR_TUMBLING_TIME_INTERVAL_SECONDS_DEFAULT_VALUE); |
| validator.validate( |
| seconds -> (Long) seconds > 0, |
| String.format( |
| "The value of %s must be greater than 0, but got %d.", |
| PROCESSOR_TUMBLING_TIME_INTERVAL_SECONDS_KEY, intervalSeconds), |
| intervalSeconds); |
| intervalInCurrentPrecision = |
| TimestampPrecisionUtils.convertToCurrPrecision(intervalSeconds, TimeUnit.SECONDS); |
| } |
| |
| @Override |
| public void customize( |
| PipeParameters parameters, PipeProcessorRuntimeConfiguration configuration) { |
| super.customize(parameters, configuration); |
| |
| LOGGER.info( |
| "TumblingTimeSamplingProcessor in {} is initialized with {}: {}s, {}: {}, {}: {}.", |
| dataBaseNameWithPathSeparator, |
| PROCESSOR_TUMBLING_TIME_INTERVAL_SECONDS_KEY, |
| intervalInCurrentPrecision, |
| PROCESSOR_DOWN_SAMPLING_MEMORY_LIMIT_IN_BYTES_KEY, |
| memoryLimitInBytes, |
| PROCESSOR_DOWN_SAMPLING_SPLIT_FILE_KEY, |
| shouldSplitFile); |
| } |
| |
| @Override |
| protected PartialPathLastObjectCache<?> initPathLastObjectCache(long memoryLimitInBytes) { |
| pathLastObjectCache = |
| new PartialPathLastObjectCache<Long>(memoryLimitInBytes) { |
| @Override |
| protected long calculateMemoryUsage(Long object) { |
| return Long.BYTES; |
| } |
| }; |
| return pathLastObjectCache; |
| } |
| |
| @Override |
| protected void processRow( |
| Row row, |
| RowCollector rowCollector, |
| String deviceSuffix, |
| AtomicReference<Exception> exception) { |
| for (int index = 0, size = row.size(); index < size; ++index) { |
| if (row.isNull(index)) { |
| continue; |
| } |
| |
| final String timeSeriesSuffix = |
| deviceSuffix + TsFileConstant.PATH_SEPARATOR + row.getColumnName(index); |
| final long currentRowTime = row.getTime(); |
| final Long lastSampleTime = pathLastObjectCache.getPartialPathLastObject(timeSeriesSuffix); |
| |
| if (lastSampleTime == null |
| || Math.abs(currentRowTime - lastSampleTime) >= intervalInCurrentPrecision) { |
| try { |
| rowCollector.collectRow(row); |
| |
| pathLastObjectCache.setPartialPathLastObject(timeSeriesSuffix, currentRowTime); |
| for (int j = index + 1; j < size; ++j) { |
| if (!row.isNull(j)) { |
| pathLastObjectCache.setPartialPathLastObject( |
| deviceSuffix + TsFileConstant.PATH_SEPARATOR + row.getColumnName(j), |
| currentRowTime); |
| } |
| } |
| return; |
| } catch (Exception e) { |
| exception.set(e); |
| } |
| } |
| } |
| } |
| } |