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

Example 1 with Stream

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

the class ITBigQueryStorageTest method testColumnSelection.

@Test
public void testColumnSelection() throws IOException {
    TableReference tableReference = TableReference.newBuilder().setProjectId("bigquery-public-data").setDatasetId("samples").setTableId("shakespeare").build();
    TableReadOptions options = TableReadOptions.newBuilder().addSelectedFields("word").addSelectedFields("word_count").setRowRestriction("word_count > 100").build();
    CreateReadSessionRequest request = CreateReadSessionRequest.newBuilder().setParent(parentProjectId).setRequestedStreams(1).setTableReference(tableReference).setReadOptions(options).setFormat(DataFormat.AVRO).build();
    ReadSession session = client.createReadSession(request);
    assertEquals(String.format("Did not receive expected number of streams for table reference '%s' CreateReadSession response:%n%s", TextFormat.shortDebugString(tableReference), session.toString()), 1, session.getStreamsCount());
    StreamPosition readPosition = StreamPosition.newBuilder().setStream(session.getStreams(0)).build();
    ReadRowsRequest readRowsRequest = ReadRowsRequest.newBuilder().setReadPosition(readPosition).build();
    Schema avroSchema = new Schema.Parser().parse(session.getAvroSchema().getSchema());
    String actualSchemaMessage = String.format("Unexpected schema. Actual schema:%n%s", avroSchema.toString(/* pretty = */
    true));
    assertEquals(actualSchemaMessage, Schema.Type.RECORD, avroSchema.getType());
    assertEquals(actualSchemaMessage, "__root__", avroSchema.getName());
    assertEquals(actualSchemaMessage, 2, avroSchema.getFields().size());
    assertEquals(actualSchemaMessage, Schema.Type.STRING, avroSchema.getField("word").schema().getType());
    assertEquals(actualSchemaMessage, Schema.Type.LONG, avroSchema.getField("word_count").schema().getType());
    SimpleRowReader reader = new SimpleRowReader(avroSchema);
    long rowCount = 0;
    ServerStream<ReadRowsResponse> stream = client.readRowsCallable().call(readRowsRequest);
    for (ReadRowsResponse response : stream) {
        rowCount += response.getRowCount();
        reader.processRows(response.getAvroRows(), new SimpleRowReader.AvroRowConsumer() {

            @Override
            public void accept(GenericData.Record record) {
                String rowAssertMessage = String.format("Row not matching expectations: %s", record.toString());
                Long wordCount = (Long) record.get("word_count");
                assertWithMessage(rowAssertMessage).that(wordCount).isGreaterThan(100L);
                Utf8 word = (Utf8) record.get("word");
                assertWithMessage(rowAssertMessage).that(word.length()).isGreaterThan(0);
            }
        });
    }
    assertEquals(1_333, rowCount);
}

Example 2 with Stream

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

the class ITBigQueryStorageTest method testSimpleRead.

@Test
public void testSimpleRead() {
    TableReference tableReference = TableReference.newBuilder().setProjectId("bigquery-public-data").setDatasetId("samples").setTableId("shakespeare").build();
    ReadSession session = client.createReadSession(/* tableReference = */
    tableReference, /* parent = */
    parentProjectId, /* requestedStreams = */
    1);
    assertEquals(String.format("Did not receive expected number of streams for table reference '%s' CreateReadSession response:%n%s", TextFormat.shortDebugString(tableReference), session.toString()), 1, session.getStreamsCount());
    StreamPosition readPosition = StreamPosition.newBuilder().setStream(session.getStreams(0)).build();
    ReadRowsRequest readRowsRequest = ReadRowsRequest.newBuilder().setReadPosition(readPosition).build();
    long rowCount = 0;
    ServerStream<ReadRowsResponse> stream = client.readRowsCallable().call(readRowsRequest);
    for (ReadRowsResponse response : stream) {
        rowCount += response.getRowCount();
    }
    assertEquals(164_656, rowCount);
}

Example 3 with Stream

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

the class ITBigQueryStorageTest method ProcessRowsAtSnapshot.

/**
 * Reads all the rows from the specified tableReference.
 *
 * <p>For every row, the consumer is called for processing.
 *
 * @param tableReference
 * @param snapshotInMillis Optional. If specified, all rows up to timestamp will be returned.
 * @param filter Optional. If specified, it will be used to restrict returned data.
 * @param consumer that receives all Avro rows.
 * @throws IOException
 */
private void ProcessRowsAtSnapshot(TableReference tableReference, Long snapshotInMillis, String filter, AvroRowConsumer consumer) throws IOException {
    Preconditions.checkNotNull(tableReference);
    Preconditions.checkNotNull(consumer);
    CreateReadSessionRequest.Builder createSessionRequestBuilder = CreateReadSessionRequest.newBuilder().setParent(parentProjectId).setRequestedStreams(1).setTableReference(tableReference).setFormat(DataFormat.AVRO);
    if (snapshotInMillis != null) {
        Timestamp snapshotTimestamp = Timestamp.newBuilder().setSeconds(snapshotInMillis / 1_000).setNanos((int) ((snapshotInMillis % 1000) * 1000000)).build();
        createSessionRequestBuilder.setTableModifiers(TableModifiers.newBuilder().setSnapshotTime(snapshotTimestamp).build());
    }
    if (filter != null && !filter.isEmpty()) {
        createSessionRequestBuilder.setReadOptions(TableReadOptions.newBuilder().setRowRestriction(filter).build());
    }
    ReadSession session = client.createReadSession(createSessionRequestBuilder.build());
    assertEquals(String.format("Did not receive expected number of streams for table reference '%s' CreateReadSession response:%n%s", TextFormat.shortDebugString(tableReference), session.toString()), 1, session.getStreamsCount());
    StreamPosition readPosition = StreamPosition.newBuilder().setStream(session.getStreams(0)).build();
    ReadRowsRequest readRowsRequest = ReadRowsRequest.newBuilder().setReadPosition(readPosition).build();
    SimpleRowReader reader = new SimpleRowReader(new Schema.Parser().parse(session.getAvroSchema().getSchema()));
    ServerStream<ReadRowsResponse> stream = client.readRowsCallable().call(readRowsRequest);
    for (ReadRowsResponse response : stream) {
        reader.processRows(response.getAvroRows(), consumer);
    }
}

Example 4 with Stream

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

the class BigQueryStorageClientTest method splitReadStreamExceptionTest.

@Test
@SuppressWarnings("all")
public void splitReadStreamExceptionTest() throws Exception {
    StatusRuntimeException exception = new StatusRuntimeException(Status.INVALID_ARGUMENT);
    mockBigQueryStorage.addException(exception);
    try {
        Stream originalStream = Stream.newBuilder().build();
        client.splitReadStream(originalStream);
        Assert.fail("No exception raised");
    } catch (InvalidArgumentException e) {
    // Expected exception
    }
}

Example 5 with Stream

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

the class BigQueryStorageClientTest method finalizeStreamTest.

@Test
@SuppressWarnings("all")
public void finalizeStreamTest() {
    Empty expectedResponse = Empty.newBuilder().build();
    mockBigQueryStorage.addResponse(expectedResponse);
    Stream stream = Stream.newBuilder().build();
    client.finalizeStream(stream);
    List<AbstractMessage> actualRequests = mockBigQueryStorage.getRequests();
    Assert.assertEquals(1, actualRequests.size());
    FinalizeStreamRequest actualRequest = (FinalizeStreamRequest) actualRequests.get(0);
    Assert.assertEquals(stream, actualRequest.getStream());
    Assert.assertTrue(channelProvider.isHeaderSent(ApiClientHeaderProvider.getDefaultApiClientHeaderKey(), GaxGrpcProperties.getDefaultApiClientHeaderPattern()));
}