Examples with ArrowSchema com.google.cloud.bigquery.storage.v1.ArrowSchema used on opensource projects

Example 1 with ArrowSchema

use of com.google.cloud.bigquery.storage.v1.ArrowSchema in project beam by apache.

the class BigQueryIOStorageReadTest method createResponseArrow.

private ReadRowsResponse createResponseArrow(org.apache.arrow.vector.types.pojo.Schema arrowSchema, List<String> name, List<Long> number, double progressAtResponseStart, double progressAtResponseEnd) {
    ArrowRecordBatch serializedRecord;
    try (VectorSchemaRoot schemaRoot = VectorSchemaRoot.create(arrowSchema, allocator)) {
        schemaRoot.allocateNew();
        schemaRoot.setRowCount(name.size());
        VarCharVector strVector = (VarCharVector) schemaRoot.getFieldVectors().get(0);
        BigIntVector bigIntVector = (BigIntVector) schemaRoot.getFieldVectors().get(1);
        for (int i = 0; i < name.size(); i++) {
            bigIntVector.set(i, number.get(i));
            strVector.set(i, new Text(name.get(i)));
        }
        VectorUnloader unLoader = new VectorUnloader(schemaRoot);
        try (org.apache.arrow.vector.ipc.message.ArrowRecordBatch records = unLoader.getRecordBatch()) {
            try (ByteArrayOutputStream os = new ByteArrayOutputStream()) {
                MessageSerializer.serialize(new WriteChannel(Channels.newChannel(os)), records);
                serializedRecord = ArrowRecordBatch.newBuilder().setRowCount(records.getLength()).setSerializedRecordBatch(ByteString.copyFrom(os.toByteArray())).build();
            } catch (IOException e) {
                throw new RuntimeException("Error writing to byte array output stream", e);
            }
        }
    }
    return ReadRowsResponse.newBuilder().setArrowRecordBatch(serializedRecord).setRowCount(name.size()).setStats(StreamStats.newBuilder().setProgress(Progress.newBuilder().setAtResponseStart(progressAtResponseStart).setAtResponseEnd(progressAtResponseEnd))).build();
}

Example 2 with ArrowSchema

use of com.google.cloud.bigquery.storage.v1.ArrowSchema in project beam by apache.

the class BigQueryStorageArrowReader method processReadRowsResponse.

@Override
public void processReadRowsResponse(ReadRowsResponse readRowsResponse) throws IOException {
    com.google.cloud.bigquery.storage.v1.ArrowRecordBatch recordBatch = readRowsResponse.getArrowRecordBatch();
    rowCount = recordBatch.getRowCount();
    this.alloc = new RootAllocator(Long.MAX_VALUE);
    InputStream input = protoSchema.getSerializedSchema().newInput();
    Schema arrowSchema = ArrowConversion.arrowSchemaFromInput(input);
    this.recordBatchIterator = ArrowConversion.rowsFromSerializedRecordBatch(arrowSchema, recordBatch.getSerializedRecordBatch().newInput(), this.alloc);
}