Examples with Stream com.google.cloud.bigquery.storage.v1beta1.Storage.Stream used on opensource projects

Example 21 with Stream

use of com.google.cloud.bigquery.storage.v1beta1.Storage.Stream in project java-bigquerystorage by googleapis.

the class ITBigQueryStorageTest method ReadStreamToOffset.

/**
 * Reads to the specified row offset within the stream. If the stream does not have the desired
 * rows to read, it will read all of them.
 *
 * @param stream
 * @param rowOffset
 * @return the number of requested rows to skip or the total rows read if stream had less rows.
 */
private long ReadStreamToOffset(Stream stream, long rowOffset) {
    StreamPosition readPosition = StreamPosition.newBuilder().setStream(stream).build();
    ReadRowsRequest readRowsRequest = ReadRowsRequest.newBuilder().setReadPosition(readPosition).build();
    long rowCount = 0;
    ServerStream<ReadRowsResponse> serverStream = client.readRowsCallable().call(readRowsRequest);
    Iterator<ReadRowsResponse> responseIterator = serverStream.iterator();
    while (responseIterator.hasNext()) {
        ReadRowsResponse response = responseIterator.next();
        rowCount += response.getRowCount();
        if (rowCount >= rowOffset) {
            return rowOffset;
        }
    }
    return rowCount;
}

Example 22 with Stream

use of com.google.cloud.bigquery.storage.v1beta1.Storage.Stream in project presto by prestodb.

the class BigQuerySplitManager method readFromBigQuery.

private ImmutableList<BigQuerySplit> readFromBigQuery(TableId tableId, Optional<List<ColumnHandle>> projectedColumns, int actualParallelism, Optional<String> filter) {
    List<ColumnHandle> columns = projectedColumns.orElse(ImmutableList.of());
    ImmutableList<String> projectedColumnsNames = columns.stream().map(column -> ((BigQueryColumnHandle) column).getName()).collect(toImmutableList());
    ReadSession readSession = new ReadSessionCreator(readSessionCreatorConfig, bigQueryClient, bigQueryStorageClientFactory).create(tableId, projectedColumnsNames, filter, actualParallelism);
    return readSession.getStreamsList().stream().map(stream -> BigQuerySplit.forStream(stream.getName(), readSession.getAvroSchema().getSchema(), columns)).collect(toImmutableList());
}

Example 23 with Stream

use of com.google.cloud.bigquery.storage.v1beta1.Storage.Stream in project hadoop-connectors by GoogleCloudDataproc.

the class DirectBigQueryRecordReaderTest method initialize.

private void initialize() throws Exception {
    ReadRowsRequest request = ReadRowsRequest.newBuilder().setReadPosition(StreamPosition.newBuilder().setStream(STREAM)).build();
    reader.initialize(split, taskContext);
    verify(bqClient).readRowsCallable();
    verify(readRows).call(eq(request));
}

Example 24 with Stream

use of com.google.cloud.bigquery.storage.v1beta1.Storage.Stream in project hadoop-connectors by GoogleCloudDataproc.

the class DirectBigQueryRecordReader method initialize.

@Override
public void initialize(InputSplit genericSplit, TaskAttemptContext context) throws IOException {
    DirectBigQueryInputSplit split = (DirectBigQueryInputSplit) genericSplit;
    schema = parser.parse(checkNotNull(split.getSchema(), "schema"));
    stream = Stream.newBuilder().setName(checkNotNull(split.getName(), "name")).build();
    ReadRowsRequest request = ReadRowsRequest.newBuilder().setReadPosition(StreamPosition.newBuilder().setStream(stream).build()).build();
    client = getClient(context.getConfiguration());
    responseIterator = client.readRowsCallable().call(request).iterator();
    recordIterator = Collections.emptyIterator();
    limit = split.getLimit();
    idx = 0;
    finalized = false;
}