npawar commented on a change in pull request #6718: URL: https://github.com/apache/incubator-pinot/pull/6718#discussion_r603599535
########## File path: pinot-plugins/pinot-segment-writer/pinot-segment-writer-file-based/src/main/java/org/apache/pinot/plugin/segmentwriter/filebased/FileBasedSegmentWriter.java ########## @@ -0,0 +1,193 @@ +/** + * 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.pinot.plugin.segmentwriter.filebased; + +import com.google.common.base.Preconditions; +import com.google.common.collect.Lists; +import java.io.File; +import java.io.IOException; +import java.net.URI; +import java.nio.file.Files; +import java.nio.file.Paths; +import java.util.HashMap; +import java.util.Map; +import java.util.Set; +import org.apache.avro.file.DataFileWriter; +import org.apache.avro.generic.GenericData; +import org.apache.avro.generic.GenericDatumWriter; +import org.apache.commons.collections.CollectionUtils; +import org.apache.commons.io.FileUtils; +import org.apache.commons.lang3.StringUtils; +import org.apache.pinot.common.utils.TarGzCompressionUtils; +import org.apache.pinot.core.data.recordtransformer.CompositeTransformer; +import org.apache.pinot.core.data.recordtransformer.RecordTransformer; +import org.apache.pinot.core.indexsegment.generator.SegmentGeneratorConfig; +import org.apache.pinot.core.util.IngestionUtils; +import org.apache.pinot.core.util.SegmentProcessorAvroUtils; +import org.apache.pinot.spi.config.table.TableConfig; +import org.apache.pinot.spi.config.table.ingestion.BatchIngestionConfig; +import org.apache.pinot.spi.data.Schema; +import org.apache.pinot.spi.data.readers.FileFormat; +import org.apache.pinot.spi.data.readers.GenericRow; +import org.apache.pinot.spi.ingestion.batch.BatchConfig; +import org.apache.pinot.spi.ingestion.batch.BatchConfigProperties; +import org.apache.pinot.spi.ingestion.batch.spec.Constants; +import org.apache.pinot.spi.ingestion.segment.writer.SegmentWriter; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + + +/** + * A {@link SegmentWriter} implementation that uses a local file as a buffer to collect {@link GenericRow}. + * The {@link GenericRow} are written to the buffer as AVRO records. + */ +public class FileBasedSegmentWriter implements SegmentWriter { + + private static final Logger LOGGER = LoggerFactory.getLogger(FileBasedSegmentWriter.class); + private static final FileFormat BUFFER_FILE_FORMAT = FileFormat.AVRO; + + private TableConfig _tableConfig; + private String _tableNameWithType; + private BatchIngestionConfig _batchIngestionConfig; + private BatchConfig _batchConfig; + private String _outputDirURI; + private Schema _schema; + private Set<String> _fieldsToRead; + private RecordTransformer _recordTransformer; + + private File _stagingDir; + private File _bufferFile; + + private org.apache.avro.Schema _avroSchema; + private DataFileWriter<GenericData.Record> _recordWriter; + private GenericData.Record _reusableRecord; + + @Override + public void init(TableConfig tableConfig, Schema schema) + throws Exception { + _tableConfig = tableConfig; + _tableNameWithType = _tableConfig.getTableName(); + + Preconditions.checkState( + _tableConfig.getIngestionConfig() != null && _tableConfig.getIngestionConfig().getBatchIngestionConfig() != null + && CollectionUtils + .isNotEmpty(_tableConfig.getIngestionConfig().getBatchIngestionConfig().getBatchConfigMaps()), + "Must provide ingestionConfig->batchIngestionConfig->batchConfigMaps in tableConfig for table: %s", + _tableNameWithType); + _batchIngestionConfig = _tableConfig.getIngestionConfig().getBatchIngestionConfig(); + _batchConfig = new BatchConfig(_tableNameWithType, _batchIngestionConfig.getBatchConfigMaps().get(0)); + + Preconditions.checkState(StringUtils.isNotBlank(_batchConfig.getOutputDirURI()), + "Must provide: %s in batchConfigs for table: %s", BatchConfigProperties.OUTPUT_DIR_URI, _tableNameWithType); + _outputDirURI = _batchConfig.getOutputDirURI(); + Files.createDirectories(Paths.get(_outputDirURI)); + + _schema = schema; + _fieldsToRead = _schema.getColumnNames(); + _recordTransformer = CompositeTransformer.getDefaultTransformer(_tableConfig, _schema); + _avroSchema = SegmentProcessorAvroUtils.convertPinotSchemaToAvroSchema(_schema); + _reusableRecord = new GenericData.Record(_avroSchema); + + // Create tmp dir + _stagingDir = new File(FileUtils.getTempDirectory(), + String.format("segment_writer_staging_%s_%d", _tableNameWithType, System.currentTimeMillis())); + Preconditions.checkState(_stagingDir.mkdirs(), "Failed to create staging dir: %s", _stagingDir.getAbsolutePath()); + + // Create buffer file + File bufferDir = new File(_stagingDir, "buffer_dir"); + Preconditions.checkState(bufferDir.mkdirs(), "Failed to create buffer_dir: %s", bufferDir.getAbsolutePath()); + _bufferFile = new File(bufferDir, "buffer_file"); + resetBuffer(); + LOGGER.info("Initialized {} for table: {}", FileBasedSegmentWriter.class.getName(), _tableNameWithType); + } + + private void resetBuffer() + throws IOException { + FileUtils.deleteQuietly(_bufferFile); + _recordWriter = new DataFileWriter<>(new GenericDatumWriter<>(_avroSchema)); + _recordWriter.create(_avroSchema, _bufferFile); + } + + @Override + public void collect(GenericRow row) + throws IOException { + GenericRow transform = _recordTransformer.transform(row); + SegmentProcessorAvroUtils.convertGenericRowToAvroRecord(transform, _reusableRecord, _fieldsToRead); + _recordWriter.append(_reusableRecord); Review comment: added the NotThreadSafe annotation. Do we still need to block it? Do you anticipate the caller would invoke flush in a separate executor thread? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
