| /* |
| * 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.easy.sequencefile; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| import org.apache.drill.common.exceptions.ExecutionSetupException; |
| import org.apache.drill.common.expression.SchemaPath; |
| import org.apache.drill.common.logical.StoragePluginConfig; |
| import org.apache.drill.exec.ops.FragmentContext; |
| import org.apache.drill.exec.physical.base.AbstractGroupScan; |
| import org.apache.drill.exec.planner.common.DrillStatsTable.TableStatistics; |
| import org.apache.drill.exec.proto.UserBitShared.CoreOperatorType; |
| import org.apache.drill.exec.server.DrillbitContext; |
| import org.apache.drill.exec.store.RecordReader; |
| import org.apache.drill.exec.store.RecordWriter; |
| import org.apache.drill.exec.store.dfs.DrillFileSystem; |
| import org.apache.drill.exec.store.dfs.FileSelection; |
| import org.apache.drill.exec.store.dfs.easy.EasyFormatPlugin; |
| import org.apache.drill.exec.store.dfs.easy.EasyGroupScan; |
| import org.apache.drill.exec.store.dfs.easy.EasyWriter; |
| import org.apache.drill.exec.store.dfs.easy.FileWork; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.mapred.FileSplit; |
| |
| public class SequenceFileFormatPlugin extends EasyFormatPlugin<SequenceFileFormatConfig> { |
| public SequenceFileFormatPlugin(String name, DrillbitContext context, Configuration fsConf, |
| StoragePluginConfig storageConfig) { |
| this(name, context, fsConf, storageConfig, new SequenceFileFormatConfig(null)); |
| } |
| |
| public SequenceFileFormatPlugin(String name, DrillbitContext context, Configuration fsConf, |
| StoragePluginConfig storageConfig, SequenceFileFormatConfig formatConfig) { |
| super(name, context, fsConf, storageConfig, formatConfig, |
| true, false, /* splittable = */ true, /* compressible = */ true, |
| formatConfig.getExtensions(), "sequencefile"); |
| } |
| |
| @Override |
| public boolean supportsPushDown() { |
| return true; |
| } |
| |
| @Override |
| public AbstractGroupScan getGroupScan(String userName, FileSelection selection, List<SchemaPath> columns) |
| throws IOException { |
| return new EasyGroupScan(userName, selection, this, columns, selection.selectionRoot, null); |
| } |
| |
| @Override |
| public boolean supportsStatistics() { |
| return false; |
| } |
| |
| @Override |
| public TableStatistics readStatistics(FileSystem fs, Path statsTablePath) throws IOException { |
| throw new UnsupportedOperationException("unimplemented"); |
| } |
| |
| @Override |
| public void writeStatistics(TableStatistics statistics, FileSystem fs, Path statsTablePath) throws IOException { |
| throw new UnsupportedOperationException("unimplemented"); |
| } |
| |
| @Override |
| public RecordReader getRecordReader(FragmentContext context, |
| DrillFileSystem dfs, |
| FileWork fileWork, |
| List<SchemaPath> columns, |
| String userName) throws ExecutionSetupException { |
| final Path path = dfs.makeQualified(fileWork.getPath()); |
| final FileSplit split = new FileSplit(path, fileWork.getStart(), fileWork.getLength(), new String[]{""}); |
| return new SequenceFileRecordReader(split, dfs, context.getQueryUserName(), userName); |
| } |
| |
| @Override |
| public int getReaderOperatorType() { |
| return CoreOperatorType.SEQUENCE_SUB_SCAN_VALUE; |
| } |
| |
| @Override |
| public RecordWriter getRecordWriter(FragmentContext context, EasyWriter writer) throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public int getWriterOperatorType() { |
| throw new UnsupportedOperationException(); |
| } |
| } |