akashrn5 commented on a change in pull request #3875: URL: https://github.com/apache/carbondata/pull/3875#discussion_r508356404
########## File path: integration/presto/src/main/prestosql/org/apache/carbondata/presto/CarbonDataFileWriter.java ########## @@ -0,0 +1,188 @@ +/* + * 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.carbondata.presto; + +import java.io.IOException; +import java.io.UncheckedIOException; +import java.util.Arrays; +import java.util.List; +import java.util.Properties; + +import org.apache.carbondata.common.logging.LogServiceFactory; +import org.apache.carbondata.core.constants.CarbonCommonConstants; +import org.apache.carbondata.hadoop.api.CarbonTableOutputFormat; +import org.apache.carbondata.hive.CarbonHiveSerDe; +import org.apache.carbondata.hive.MapredCarbonOutputFormat; +import org.apache.carbondata.presto.impl.CarbonTableConfig; + +import com.google.common.collect.ImmutableList; +import io.prestosql.plugin.hive.HiveFileWriter; +import io.prestosql.plugin.hive.HiveType; +import io.prestosql.plugin.hive.HiveWriteUtils; +import io.prestosql.spi.Page; +import io.prestosql.spi.PrestoException; +import io.prestosql.spi.block.Block; +import io.prestosql.spi.type.Type; +import io.prestosql.spi.type.TypeManager; +import org.apache.commons.lang3.StringUtils; +import org.apache.hadoop.fs.Path; +import org.apache.hadoop.hive.conf.HiveConf; +import org.apache.hadoop.hive.ql.exec.FileSinkOperator; +import org.apache.hadoop.hive.ql.io.HiveOutputFormat; +import org.apache.hadoop.hive.ql.io.IOConstants; +import org.apache.hadoop.hive.ql.io.parquet.serde.ArrayWritableObjectInspector; +import org.apache.hadoop.hive.serde2.SerDeException; +import org.apache.hadoop.hive.serde2.objectinspector.SettableStructObjectInspector; +import org.apache.hadoop.hive.serde2.objectinspector.StructField; +import org.apache.hadoop.io.Text; +import org.apache.hadoop.mapred.JobConf; +import org.apache.hadoop.mapred.Reporter; +import org.apache.log4j.Logger; + +import static com.google.common.collect.ImmutableList.toImmutableList; +import static io.prestosql.plugin.hive.HiveErrorCode.HIVE_WRITER_DATA_ERROR; +import static java.util.Objects.requireNonNull; +import static java.util.stream.Collectors.toList; +import static org.apache.hadoop.hive.conf.HiveConf.ConfVars.COMPRESSRESULT; + +/** + * This class implements HiveFileWriter and it creates the carbonFileWriter to write the page data + * sent from presto. + */ +public class CarbonDataFileWriter implements HiveFileWriter { + + private static final Logger LOG = + LogServiceFactory.getLogService(CarbonDataFileWriter.class.getName()); + + private final JobConf configuration; + private final Path outPutPath; + private final FileSinkOperator.RecordWriter recordWriter; + private final CarbonHiveSerDe serDe; + private final int fieldCount; + private final Object row; + private final SettableStructObjectInspector tableInspector; + private final List<StructField> structFields; + private final HiveWriteUtils.FieldSetter[] setters; + + private boolean isCommitDone; + + public CarbonDataFileWriter(Path outPutPath, List<String> inputColumnNames, Properties properties, + JobConf configuration, TypeManager typeManager) throws SerDeException { + requireNonNull(outPutPath, "path is null"); + // take the outputPath same as location in compliance with the carbon store folder structure. + this.outPutPath = new Path(properties.getProperty("location")); + this.configuration = requireNonNull(configuration, "conf is null"); + List<String> columnNames = Arrays + .asList(properties.getProperty(IOConstants.COLUMNS, "").split(CarbonCommonConstants.COMMA)); + List<Type> fileColumnTypes = + HiveType.toHiveTypes(properties.getProperty(IOConstants.COLUMNS_TYPES, "")).stream() + .map(hiveType -> hiveType.getType(typeManager)).collect(toList()); + this.fieldCount = columnNames.size(); + this.serDe = new CarbonHiveSerDe(); + serDe.initialize(configuration, properties); + this.tableInspector = (ArrayWritableObjectInspector) serDe.getObjectInspector(); + + this.structFields = + ImmutableList.copyOf(inputColumnNames.stream().map(tableInspector::getStructFieldRef) + .collect(toImmutableList())); + + this.row = tableInspector.create(); + + this.setters = new HiveWriteUtils.FieldSetter[structFields.size()]; + for (int i = 0; i < setters.length; i++) { + setters[i] = HiveWriteUtils.createFieldSetter(tableInspector, row, structFields.get(i), + fileColumnTypes.get(structFields.get(i).getFieldID())); + } + String encodedLoadModel = this.configuration.get(CarbonTableConfig.CARBON_PRESTO_LOAD_MODEL); + if (StringUtils.isNotEmpty(encodedLoadModel)) { + this.configuration.set(CarbonTableOutputFormat.LOAD_MODEL, encodedLoadModel); + } + try { + boolean compress = HiveConf.getBoolVar(this.configuration, COMPRESSRESULT); + Object writer = + Class.forName(MapredCarbonOutputFormat.class.getName()).getConstructor().newInstance(); + this.recordWriter = ((MapredCarbonOutputFormat<?>) writer) + .getHiveRecordWriter(this.configuration, this.outPutPath, Text.class, compress, + properties, Reporter.NULL); + } catch (Exception e) { + LOG.error("error while initializing writer", e); + throw new RuntimeException("writer class not found"); + } + } + + @Override + public long getWrittenBytes() { + if (isCommitDone) { + try { + return outPutPath.getFileSystem(configuration).getFileStatus(outPutPath).getLen(); + } catch (IOException e) { + throw new UncheckedIOException(e); + } + } + return 0; + } + + @Override + public long getSystemMemoryUsage() { + return 0; + } + + @Override + public void appendRows(Page dataPage) { + for (int position = 0; position < dataPage.getPositionCount(); position++) { + appendRow(dataPage, position); + } + } + + private void appendRow(Page dataPage, int position) { + for (int field = 0; field < fieldCount; field++) { + Block block = dataPage.getBlock(field); + if (block.isNull(position)) { + tableInspector.setStructFieldData(row, structFields.get(field), null); + } else { + setters[field].setField(block, position); + } + } + try { + recordWriter.write(serDe.serialize(row, tableInspector)); + } catch (SerDeException | IOException e) { + throw new PrestoException(HIVE_WRITER_DATA_ERROR, e); Review comment: handled in rollback ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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