Created
October 7, 2021 16:37
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Load and Export Avro from BigQuery
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| 1. writeObjectContainerFile | |
| 2. loadAvroFromLocal | |
| 3. exportToGcs | |
| def writeObjectContainerFile[T <: GenericRecord](data: Iterable[T], schema: Schema): File = { | |
| import org.apache.avro.file.DataFileWriter | |
| import org.apache.avro.generic.{GenericDatumWriter, GenericRecord} | |
| val file = File.createTempFile("avro-container", "") | |
| val datumWriter = new GenericDatumWriter[GenericRecord](schema) | |
| val fileWriter = new DataFileWriter[GenericRecord](datumWriter) | |
| fileWriter.create(schema, file) | |
| data.foreach(fileWriter.append) | |
| fileWriter.close() | |
| file | |
| } | |
| def loadAvroFromLocal(client: BigQuery, file: File, tableId: TableId)(implicit bec: BlockingExecutionContext): Future[Job] = { | |
| import scala.collection.JavaConverters._ | |
| val writeChannelConfiguration = WriteChannelConfiguration | |
| .newBuilder(tableId) | |
| .setFormatOptions(FormatOptions.avro()) | |
| .setUseAvroLogicalTypes(true) | |
| .setSchemaUpdateOptions(Seq(SchemaUpdateOption.ALLOW_FIELD_ADDITION, SchemaUpdateOption.ALLOW_FIELD_RELAXATION).asJava) | |
| .setCreateDisposition(CreateDisposition.CREATE_IF_NEEDED) | |
| .build | |
| val writer = client.writer(writeChannelConfiguration) | |
| val stream = Channels.newOutputStream(writer) | |
| Files.copy(file.toPath, stream) | |
| stream.close() | |
| awaitJobResult(writer.getJob) | |
| } | |
| def exportToGcs(client: BigQuery, sourceTableId: TableId, destinationUri: String, format: String = FormatOptions.avro.getType, useLogicalTypes: Boolean = true) | |
| (implicit bec: BlockingExecutionContext): Future[Job] = { | |
| val jobConfig = ExtractJobConfiguration.newBuilder(sourceTableId, destinationUri) | |
| .setUseAvroLogicalTypes(useLogicalTypes) | |
| .setFormat(format) | |
| .build() | |
| awaitJobResult(client.create(JobInfo.of(jobConfig))) | |
| } |
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