code: /*
   * Copyright (c) 2022 Airbyte, Inc., all rights reserved.
   */
  
  package io.airbyte.integrations.destination.gcs.parquet;
  
  import com.amazonaws.services.s3.AmazonS3;
  import com.fasterxml.jackson.databind.JsonNode;
  import com.fasterxml.jackson.databind.ObjectMapper;
  import io.airbyte.integrations.destination.gcs.GcsDestinationConfig;
  import io.airbyte.integrations.destination.gcs.credential.GcsHmacKeyCredentialConfig;
  import io.airbyte.integrations.destination.gcs.writer.BaseGcsWriter;
  import io.airbyte.integrations.destination.s3.S3Format;
  import io.airbyte.integrations.destination.s3.avro.AvroRecordFactory;
  import io.airbyte.integrations.destination.s3.parquet.S3ParquetFormatConfig;
  import io.airbyte.integrations.destination.s3.writer.DestinationFileWriter;
  import io.airbyte.protocol.models.AirbyteRecordMessage;
  import io.airbyte.protocol.models.ConfiguredAirbyteStream;
  import java.io.IOException;
  import java.net.URI;
  import java.net.URISyntaxException;
  import java.sql.Timestamp;
  import java.util.UUID;
  import org.apache.avro.Schema;
  import org.apache.avro.generic.GenericData;
  import org.apache.avro.generic.GenericData.Record;
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.fs.Path;
  import org.apache.parquet.avro.AvroParquetWriter;
  import org.apache.parquet.hadoop.ParquetWriter;
  import org.apache.parquet.hadoop.util.HadoopOutputFile;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import tech.allegro.schema.json2avro.converter.JsonAvroConverter;
  
  public class GcsParquetWriter extends BaseGcsWriter implements DestinationFileWriter {
  
    private static final Logger LOGGER = LoggerFactory.getLogger(GcsParquetWriter.class);
    private static final ObjectMapper MAPPER = new ObjectMapper();
  
    private final ParquetWriter<Record> parquetWriter;
    private final AvroRecordFactory avroRecordFactory;
    private final String gcsFileLocation;
    private final String objectKey;
  
    public GcsParquetWriter(final GcsDestinationConfig config,
                            final AmazonS3 s3Client,
                            final ConfiguredAirbyteStream configuredStream,
                            final Timestamp uploadTimestamp,
                            final Schema schema,
                            final JsonAvroConverter converter)
        throws URISyntaxException, IOException {
      super(config, s3Client, configuredStream);
  
      final String outputFilename = BaseGcsWriter.getOutputFilename(uploadTimestamp, S3Format.PARQUET);
      objectKey = String.join("/", outputPrefix, outputFilename);
      LOGGER.info("Storage path for stream '{}': {}/{}", stream.getName(), config.getBucketName(), objectKey);
  
      gcsFileLocation = String.format("s3a://%s/%s/%s", config.getBucketName(), outputPrefix, outputFilename);
      final URI uri = new URI(gcsFileLocation);
      final Path path = new Path(uri);
  
      LOGGER.info("Full GCS path for stream '{}': {}", stream.getName(), path);
  
      final S3ParquetFormatConfig formatConfig = (S3ParquetFormatConfig) config.getFormatConfig();
      final Configuration hadoopConfig = getHadoopConfig(config);
      this.parquetWriter = AvroParquetWriter.<GenericData.Record>builder(HadoopOutputFile.fromPath(path, hadoopConfig))
          .withSchema(schema)
          .withCompressionCodec(formatConfig.getCompressionCodec())
          .withRowGroupSize(formatConfig.getBlockSize())
          .withMaxPaddingSize(formatConfig.getMaxPaddingSize())
          .withPageSize(formatConfig.getPageSize())
          .withDictionaryPageSize(formatConfig.getDictionaryPageSize())
          .withDictionaryEncoding(formatConfig.isDictionaryEncoding())
          .build();
      this.avroRecordFactory = new AvroRecordFactory(schema, converter);
    }
  
    public static Configuration getHadoopConfig(final GcsDestinationConfig config) {
      final GcsHmacKeyCredentialConfig hmacKeyCredential = (GcsHmacKeyCredentialConfig) config.getGcsCredentialConfig();
      final Configuration hadoopConfig = new Configuration();
  
      // the default org.apache.hadoop.fs.s3a.S3AFileSystem does not work for GCS
      hadoopConfig.set("fs.s3a.impl", "io.airbyte.integrations.destination.gcs.util.GcsS3FileSystem");
  
      // https://stackoverflow.com/questions/64141204/process-data-in-google-storage-on-an-aws-emr-cluster-in-spark
      hadoopConfig.set("fs.s3a.access.key", hmacKeyCredential.getHmacKeyAccessId());
      hadoopConfig.set("fs.s3a.secret.key", hmacKeyCredential.getHmacKeySecret());
      hadoopConfig.setBoolean("fs.s3a.path.style.access", true);
      hadoopConfig.set("fs.s3a.endpoint", "storage.googleapis.com");
      hadoopConfig.setInt("fs.s3a.list.version", 1);
  
      return hadoopConfig;
    }
  
    @Override
    public void write(final UUID id, final AirbyteRecordMessage recordMessage) throws IOException {
      parquetWriter.write(avroRecordFactory.getAvroRecord(id, recordMessage));
    }
  
    @Override
    public void write(final JsonNode formattedData) throws IOException {
      parquetWriter.write(avroRecordFactory.getAvroRecord(formattedData));
    }
  
    @Override
    public void close(final boolean hasFailed) throws IOException {
      if (hasFailed) {
        LOGGER.warn("Failure detected. Aborting upload of stream '{}'...", stream.getName());
        parquetWriter.close();
        LOGGER.warn("Upload of stream '{}' aborted.", stream.getName());
      } else {
        LOGGER.info("Uploading remaining data for stream '{}'.", stream.getName());
        parquetWriter.close();
        LOGGER.info("Upload completed for stream '{}'.", stream.getName());
      }
    }
  
    @Override
    public String getOutputPath() {
      return objectKey;
    }
  
    @Override
    public String getFileLocation() {
      return gcsFileLocation;
    }
  
    @Override
    public S3Format getFileFormat() {
      return S3Format.PARQUET;
    }
  
  }
  