| /* |
| * 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.drill.exec.store.hdf5; |
| |
| import org.apache.drill.common.config.DrillConfig; |
| import org.apache.drill.common.exceptions.ExecutionSetupException; |
| import org.apache.drill.common.logical.StoragePluginConfig; |
| import org.apache.drill.common.types.TypeProtos; |
| import org.apache.drill.common.types.Types; |
| import org.apache.drill.exec.ExecConstants; |
| import org.apache.drill.exec.physical.impl.scan.file.FileScanFramework; |
| import org.apache.drill.exec.physical.impl.scan.file.FileScanFramework.FileScanBuilder; |
| |
| import org.apache.drill.exec.physical.impl.scan.framework.ManagedReader; |
| import org.apache.drill.exec.proto.UserBitShared; |
| import org.apache.drill.exec.server.DrillbitContext; |
| import org.apache.drill.exec.server.options.OptionManager; |
| import org.apache.drill.exec.store.dfs.easy.EasySubScan; |
| import org.apache.drill.shaded.guava.com.google.common.io.Files; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.drill.exec.store.dfs.easy.EasyFormatPlugin; |
| import org.apache.drill.exec.store.hdf5.HDF5BatchReader.HDF5ReaderConfig; |
| |
| import java.io.File; |
| |
| |
| public class HDF5FormatPlugin extends EasyFormatPlugin<HDF5FormatConfig> { |
| |
| public static final String DEFAULT_NAME = "hdf5"; |
| |
| private final DrillbitContext context; |
| |
| public HDF5FormatPlugin(String name, DrillbitContext context, |
| Configuration fsConf, |
| StoragePluginConfig storageConfig, |
| HDF5FormatConfig formatConfig) { |
| super(name, easyConfig(fsConf, formatConfig), context, storageConfig, formatConfig); |
| this.context = context; |
| } |
| |
| private static EasyFormatConfig easyConfig(Configuration fsConf, HDF5FormatConfig pluginConfig) { |
| EasyFormatConfig config = new EasyFormatConfig(); |
| config.readable = true; |
| config.writable = false; |
| config.blockSplittable = false; |
| config.compressible = true; |
| config.supportsProjectPushdown = true; |
| config.extensions = pluginConfig.getExtensions(); |
| config.fsConf = fsConf; |
| config.defaultName = DEFAULT_NAME; |
| config.readerOperatorType = UserBitShared.CoreOperatorType.HDF5_SUB_SCAN_VALUE; |
| config.useEnhancedScan = true; |
| return config; |
| } |
| |
| @Override |
| protected FileScanBuilder frameworkBuilder(OptionManager options, EasySubScan scan) throws ExecutionSetupException { |
| FileScanBuilder builder = new FileScanBuilder(); |
| |
| builder.setReaderFactory(new HDF5ReaderFactory(new HDF5BatchReader.HDF5ReaderConfig(this, formatConfig))); |
| initScanBuilder(builder, scan); |
| builder.setNullType(Types.optional(TypeProtos.MinorType.VARCHAR)); |
| return builder; |
| } |
| |
| public static class HDF5ReaderFactory extends FileScanFramework.FileReaderFactory { |
| private final HDF5ReaderConfig readerConfig; |
| |
| HDF5ReaderFactory(HDF5ReaderConfig config) { |
| readerConfig = config; |
| } |
| |
| @Override |
| public ManagedReader<? extends FileScanFramework.FileSchemaNegotiator> newReader() { |
| return new HDF5BatchReader(readerConfig); |
| } |
| } |
| |
| /** |
| * First tries to get drill temporary directory value from from config ${drill.tmp-dir}, |
| * then checks environmental variable $DRILL_TMP_DIR. |
| * If value is still missing, generates directory using {@link Files#createTempDir()}. |
| * |
| * @return drill temporary directory path |
| */ |
| protected File getTmpDir() { |
| DrillConfig config = context.getConfig(); |
| String drillTempDir; |
| if (config.hasPath(ExecConstants.DRILL_TMP_DIR)) { |
| drillTempDir = config.getString(ExecConstants.DRILL_TMP_DIR); |
| } else { |
| drillTempDir = System.getenv("DRILL_TMP_DIR"); |
| } |
| |
| if (drillTempDir == null) { |
| return Files.createTempDir(); |
| } |
| |
| return new File(drillTempDir); |
| } |
| } |