Examples with BigQueryTableToGcsTransform com.google.cloud.teleport.v2.transforms.BigQueryTableToGcsTransform used on opensource projects

Example 1 with BigQueryTableToGcsTransform

use of com.google.cloud.teleport.v2.transforms.BigQueryTableToGcsTransform in project DataflowTemplates by GoogleCloudPlatform.

the class DataplexBigQueryToGcs method transformPipeline.

@VisibleForTesting
static void transformPipeline(Pipeline pipeline, List<BigQueryTable> tables, DataplexBigQueryToGcsOptions options, String targetRootPath, BigQueryServices testBqServices, BigQueryClientFactory testBqClientFactory) {
    List<PCollection<KV<BigQueryTable, KV<BigQueryTablePartition, String>>>> fileCollections = new ArrayList<>(tables.size());
    tables.forEach(table -> {
        fileCollections.add(pipeline.apply(String.format("ExportTable-%s", table.getTableName()), new BigQueryTableToGcsTransform(table, targetRootPath, options.getFileFormat(), options.getFileCompression(), options.getEnforceSamePartitionKey()).withTestServices(testBqServices)).apply(String.format("AttachTableKeys-%s", table.getTableName()), WithKeys.of(table)));
    });
    PCollection<KV<BigQueryTable, KV<BigQueryTablePartition, String>>> exportFileResults = PCollectionList.of(fileCollections).apply("FlattenTableResults", Flatten.pCollections());
    PCollection<Void> metadataUpdateResults = exportFileResults.apply("UpdateDataplexMetadata", new UpdateDataplexBigQueryToGcsExportMetadataTransform());
    exportFileResults.apply(MapElements.into(TypeDescriptors.kvs(TypeDescriptor.of(BigQueryTable.class), TypeDescriptor.of(BigQueryTablePartition.class))).via((SerializableFunction<KV<BigQueryTable, KV<BigQueryTablePartition, String>>, KV<BigQueryTable, BigQueryTablePartition>>) input -> KV.of(input.getKey(), input.getValue().getKey()))).apply("WaitForMetadataUpdate", Wait.on(metadataUpdateResults)).apply("TruncateBigQueryData", ParDo.of(new DeleteBigQueryDataFn().withTestBqClientFactory(testBqClientFactory)));
}