| /* |
| * 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.parquet; |
| |
| import org.apache.drill.shaded.guava.com.google.common.base.Preconditions; |
| import org.apache.drill.common.exceptions.ExecutionSetupException; |
| import org.apache.drill.exec.ExecConstants; |
| import org.apache.drill.exec.ops.ExecutorFragmentContext; |
| import org.apache.drill.exec.ops.OperatorContext; |
| import org.apache.drill.exec.physical.impl.BatchCreator; |
| import org.apache.drill.exec.physical.impl.ScanBatch; |
| import org.apache.drill.exec.record.RecordBatch; |
| import org.apache.drill.exec.server.options.OptionManager; |
| import org.apache.drill.exec.store.dfs.DrillFileSystem; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| public class ParquetScanBatchCreator extends AbstractParquetScanBatchCreator implements BatchCreator<ParquetRowGroupScan> { |
| |
| @Override |
| public ScanBatch getBatch(ExecutorFragmentContext context, ParquetRowGroupScan rowGroupScan, List<RecordBatch> children) throws ExecutionSetupException { |
| Preconditions.checkArgument(children.isEmpty()); |
| OperatorContext oContext = context.newOperatorContext(rowGroupScan); |
| return getBatch(context, rowGroupScan, oContext); |
| } |
| |
| @Override |
| protected AbstractDrillFileSystemManager getDrillFileSystemCreator(OperatorContext operatorContext, OptionManager optionManager) { |
| return new ParquetDrillFileSystemManager(operatorContext, optionManager.getOption(ExecConstants.PARQUET_PAGEREADER_ASYNC).bool_val); |
| } |
| |
| |
| /** |
| * Creates file system only if it was not created before, otherwise returns already created instance. |
| */ |
| private class ParquetDrillFileSystemManager extends AbstractDrillFileSystemManager { |
| |
| private final boolean useAsyncPageReader; |
| private DrillFileSystem fs; |
| |
| ParquetDrillFileSystemManager(OperatorContext operatorContext, boolean useAsyncPageReader) { |
| super(operatorContext); |
| this.useAsyncPageReader = useAsyncPageReader; |
| } |
| |
| @Override |
| protected DrillFileSystem get(Configuration config, Path path) throws ExecutionSetupException { |
| if (fs == null) { |
| try { |
| fs = useAsyncPageReader ? operatorContext.newNonTrackingFileSystem(config) : operatorContext.newFileSystem(config); |
| } catch (IOException e) { |
| throw new ExecutionSetupException(String.format("Failed to create DrillFileSystem: %s", e.getMessage()), e); |
| } |
| } |
| return fs; |
| } |
| } |
| |
| } |