| /* |
| * 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; |
| |
| import org.apache.iotdb.commons.consensus.DataRegionId; |
| import org.apache.iotdb.commons.pipe.config.plugin.env.PipeTaskProcessorRuntimeEnvironment; |
| import org.apache.iotdb.db.pipe.event.common.tablet.PipeInsertNodeTabletInsertionEvent; |
| import org.apache.iotdb.db.pipe.event.common.tablet.PipeRawTabletInsertionEvent; |
| import org.apache.iotdb.db.storageengine.StorageEngine; |
| import org.apache.iotdb.pipe.api.PipeProcessor; |
| import org.apache.iotdb.pipe.api.access.Row; |
| import org.apache.iotdb.pipe.api.collector.EventCollector; |
| 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.pipe.api.event.Event; |
| import org.apache.iotdb.pipe.api.event.dml.insertion.TabletInsertionEvent; |
| import org.apache.iotdb.pipe.api.event.dml.insertion.TsFileInsertionEvent; |
| |
| import org.apache.tsfile.common.constant.TsFileConstant; |
| |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import static org.apache.iotdb.commons.pipe.config.constant.PipeProcessorConstant.PROCESSOR_DOWN_SAMPLING_MEMORY_LIMIT_IN_BYTES_DEFAULT_VALUE; |
| 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_DEFAULT_VALUE; |
| import static org.apache.iotdb.commons.pipe.config.constant.PipeProcessorConstant.PROCESSOR_DOWN_SAMPLING_SPLIT_FILE_KEY; |
| |
| public abstract class DownSamplingProcessor implements PipeProcessor { |
| |
| protected long memoryLimitInBytes; |
| |
| protected boolean shouldSplitFile; |
| |
| protected String dataBaseNameWithPathSeparator; |
| |
| protected PartialPathLastObjectCache<?> pathLastObjectCache; |
| |
| @Override |
| public void validate(PipeParameterValidator validator) throws Exception { |
| memoryLimitInBytes = |
| validator |
| .getParameters() |
| .getLongOrDefault( |
| PROCESSOR_DOWN_SAMPLING_MEMORY_LIMIT_IN_BYTES_KEY, |
| PROCESSOR_DOWN_SAMPLING_MEMORY_LIMIT_IN_BYTES_DEFAULT_VALUE); |
| |
| validator.validate( |
| memoryLimitInBytes -> (Long) memoryLimitInBytes > 0, |
| String.format( |
| "%s must be > 0, but got %s", |
| PROCESSOR_DOWN_SAMPLING_MEMORY_LIMIT_IN_BYTES_KEY, memoryLimitInBytes), |
| memoryLimitInBytes); |
| } |
| |
| @Override |
| public void customize( |
| PipeParameters parameters, PipeProcessorRuntimeConfiguration configuration) { |
| shouldSplitFile = |
| parameters.getBooleanOrDefault( |
| PROCESSOR_DOWN_SAMPLING_SPLIT_FILE_KEY, |
| PROCESSOR_DOWN_SAMPLING_SPLIT_FILE_DEFAULT_VALUE); |
| |
| dataBaseNameWithPathSeparator = |
| StorageEngine.getInstance() |
| .getDataRegion( |
| new DataRegionId( |
| ((PipeTaskProcessorRuntimeEnvironment) |
| configuration.getRuntimeEnvironment()) |
| .getRegionId())) |
| .getDatabaseName() |
| + TsFileConstant.PATH_SEPARATOR; |
| |
| pathLastObjectCache = initPathLastObjectCache(memoryLimitInBytes); |
| } |
| |
| protected abstract PartialPathLastObjectCache<?> initPathLastObjectCache(long memoryLimitInBytes); |
| |
| @Override |
| public void process(TabletInsertionEvent tabletInsertionEvent, EventCollector eventCollector) |
| throws Exception { |
| if (!(tabletInsertionEvent instanceof PipeInsertNodeTabletInsertionEvent) |
| && !(tabletInsertionEvent instanceof PipeRawTabletInsertionEvent)) { |
| eventCollector.collect(tabletInsertionEvent); |
| return; |
| } |
| |
| final AtomicReference<String> deviceSuffix = new AtomicReference<>(); |
| final AtomicReference<Exception> exception = new AtomicReference<>(); |
| |
| tabletInsertionEvent |
| .processRowByRow( |
| (row, rowCollector) -> { |
| // To reduce the memory usage, we use the device suffix |
| // instead of the full path as the key. |
| if (deviceSuffix.get() == null) { |
| deviceSuffix.set( |
| row.getDeviceId().replaceFirst(this.dataBaseNameWithPathSeparator, "")); |
| } |
| |
| processRow(row, rowCollector, deviceSuffix.get(), exception); |
| }) |
| .forEach( |
| event -> { |
| try { |
| eventCollector.collect(event); |
| } catch (Exception e) { |
| exception.set(e); |
| } |
| }); |
| |
| if (exception.get() != null) { |
| throw exception.get(); |
| } |
| } |
| |
| protected abstract void processRow( |
| Row row, |
| RowCollector rowCollector, |
| String deviceSuffix, |
| AtomicReference<Exception> exception); |
| |
| /** |
| * If data comes in {@link TsFileInsertionEvent}, we will not split it into {@link |
| * TabletInsertionEvent} by default, because the data in {@link TsFileInsertionEvent} is already |
| * compressed, down-sampling may not reduce the size of data but will surely increase the CPU |
| * usage. |
| */ |
| @Override |
| public void process(TsFileInsertionEvent tsFileInsertionEvent, EventCollector eventCollector) |
| throws Exception { |
| if (shouldSplitFile) { |
| try { |
| for (final TabletInsertionEvent tabletInsertionEvent : |
| tsFileInsertionEvent.toTabletInsertionEvents()) { |
| process(tabletInsertionEvent, eventCollector); |
| } |
| } finally { |
| tsFileInsertionEvent.close(); |
| } |
| } else { |
| eventCollector.collect(tsFileInsertionEvent); |
| } |
| } |
| |
| @Override |
| public void process(Event event, EventCollector eventCollector) throws Exception { |
| eventCollector.collect(event); |
| } |
| |
| @Override |
| public void close() throws Exception { |
| if (pathLastObjectCache != null) { |
| pathLastObjectCache.close(); |
| } |
| } |
| } |