Examples with ReadRowsResponse com.google.cloud.bigquery.storage.v1beta2.ReadRowsResponse used on opensource projects

Example 61 with ReadRowsResponse

use of com.google.cloud.bigquery.storage.v1beta2.ReadRowsResponse in project java-bigquerystorage by googleapis.

the class ITBigQueryStorageTest method testSimpleReadAndResume.

@Test
public void testSimpleReadAndResume() {
    String table = BigQueryResource.FormatTableResource(/* projectId = */
    "bigquery-public-data", /* datasetId = */
    "samples", /* tableId = */
    "shakespeare");
    ReadSession session = client.createReadSession(/* parent = */
    parentProjectId, /* readSession = */
    ReadSession.newBuilder().setTable(table).setDataFormat(DataFormat.AVRO).build(), /* maxStreamCount = */
    1);
    assertEquals(String.format("Did not receive expected number of streams for table '%s' CreateReadSession response:%n%s", table, session.toString()), 1, session.getStreamsCount());
    // We have to read some number of rows in order to be able to resume. More details:
    long rowCount = ReadStreamToOffset(session.getStreams(0), /* rowOffset = */
    34_846);
    ReadRowsRequest readRowsRequest = ReadRowsRequest.newBuilder().setReadStream(session.getStreams(0).getName()).setOffset(rowCount).build();
    ServerStream<ReadRowsResponse> stream = client.readRowsCallable().call(readRowsRequest);
    for (ReadRowsResponse response : stream) {
        rowCount += response.getRowCount();
    }
    // Verifies that the number of rows skipped and read equals to the total number of rows in the
    // table.
    assertEquals(164_656, rowCount);
}

Example 62 with ReadRowsResponse

use of com.google.cloud.bigquery.storage.v1beta2.ReadRowsResponse 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 readStream
 * @param rowOffset
 * @return the number of requested rows to skip or the total rows read if stream had less rows.
 */
private long ReadStreamToOffset(ReadStream readStream, long rowOffset) {
    ReadRowsRequest readRowsRequest = ReadRowsRequest.newBuilder().setReadStream(readStream.getName()).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 63 with ReadRowsResponse

use of com.google.cloud.bigquery.storage.v1beta2.ReadRowsResponse in project java-bigquerystorage by googleapis.

the class ITBigQueryStorageTest method testSimpleRead.

@Test
public void testSimpleRead() {
    String table = BigQueryResource.FormatTableResource(/* projectId = */
    "bigquery-public-data", /* datasetId = */
    "samples", /* tableId = */
    "shakespeare");
    ReadSession session = client.createReadSession(/* parent = */
    parentProjectId, /* readSession = */
    ReadSession.newBuilder().setTable(table).setDataFormat(DataFormat.AVRO).build(), /* maxStreamCount = */
    1);
    assertEquals(String.format("Did not receive expected number of streams for table '%s' CreateReadSession response:%n%s", table, session.toString()), 1, session.getStreamsCount());
    ReadRowsRequest readRowsRequest = ReadRowsRequest.newBuilder().setReadStream(session.getStreams(0).getName()).build();
    long rowCount = 0;
    ServerStream<ReadRowsResponse> stream = client.readRowsCallable().call(readRowsRequest);
    for (ReadRowsResponse response : stream) {
        rowCount += response.getRowCount();
    }
    assertEquals(164_656, rowCount);
}

Example 64 with ReadRowsResponse

use of com.google.cloud.bigquery.storage.v1beta2.ReadRowsResponse in project java-bigquerystorage by googleapis.

the class ReadRowsRetryTest method getRowCount.

private int getRowCount(ReadRowsRequest request) {
    ServerStream<ReadRowsResponse> serverStream = client.readRowsCallable().call(request);
    int rowCount = 0;
    for (ReadRowsResponse readRowsResponse : serverStream) {
        rowCount += readRowsResponse.getRowCount();
    }
    return rowCount;
}

Example 65 with ReadRowsResponse

use of com.google.cloud.bigquery.storage.v1beta2.ReadRowsResponse in project java-bigquerystorage by googleapis.

the class ITBigQueryStorageLongRunningTest method readAllRowsFromStream.

private long readAllRowsFromStream(ReadStream readStream) {
    ReadRowsRequest readRowsRequest = ReadRowsRequest.newBuilder().setReadStream(readStream.getName()).build();
    long rowCount = 0;
    ServerStream<ReadRowsResponse> serverStream = client.readRowsCallable().call(readRowsRequest);
    for (ReadRowsResponse response : serverStream) {
        rowCount += response.getRowCount();
    }
    LOG.info(String.format("Read total of %d rows from stream '%s'.", rowCount, readStream.getName()));
    return rowCount;
}