public async Task <BigtableByteString> InsertRowAsync(
TableName tableName,
string familyName = null,
BigtableByteString?qualifierName = null,
BigtableByteString?value = null,
BigtableVersion?version = null)
{
BigtableByteString rowKey = Guid.NewGuid().ToString();
familyName = familyName ?? DefaultColumnFamily;
qualifierName = qualifierName ?? DefaultColumnQualifier;
value = value ?? DefaultValue;
await TableClient.MutateRowAsync(
tableName,
rowKey,
Mutations.SetCell(
familyName,
qualifierName.Value,
value.Value,
version));
await BigtableAssert.HasSingleValueAsync(
TableClient,
tableName,
rowKey,
familyName,
qualifierName.Value,
value.Value,
version);
return(rowKey);
}
/// <summary>
/// Add Test Data into Given Google Cloud Bigtable
/// </summary>
public void InsertTestDataToTable()
{
try
{
if (!IsTableExists())
{
throw new Exception("No Such Table Found");
}
var bigtableClient = BigtableClient.Create();
List <Mutation> Cols = new List <Mutation>();
TableName _table = new TableName(ProjectId, InstanceId, TableName);
var request = new MutateRowsRequest
{
TableNameAsTableName = _table,
};
request.Entries.Add(Mutations.CreateEntry(Guid.NewGuid().ToString(),
Mutations.SetCell(ColumnFamily, "TestColumnName", "Test Column Value")));
bigtableClient.MutateRows(request);
}
catch (RpcException ex)
{
throw ex;
}
catch (Exception ex)
{
throw ex;
}
}
public async Task InsertRowsAsync(
TableName tableName,
IEnumerable <BigtableByteString> rowKeys,
string familyName = null,
BigtableByteString?qualifierName = null,
BigtableByteString?valuePrefix = null,
BigtableVersion?version = null)
{
BigtableByteString rowKey = Guid.NewGuid().ToString();
familyName = familyName ?? DefaultColumnFamily;
qualifierName = qualifierName ?? "row_index";
valuePrefix = valuePrefix ?? "";
int counter = 0;
var response = await TableClient.MutateRowsAsync(
tableName,
rowKeys.Select(k =>
Mutations.CreateEntry(
k.Value,
Mutations.SetCell(
familyName,
qualifierName.Value,
valuePrefix.Value.Value.Concat(
new BigtableByteString(counter++).Value),
version))).ToArray());
var entries = response.Entries.OrderBy(e => e.Index);
Assert.True(entries.All(e => e.Status.Code == (int)Code.Ok));
}
public void IdempotentCheckOnMutateRowRequest()
{
var setCell =
Mutations.SetCell("abc", "cq1", "value", new BigtableVersion(-1));
var deleteFromColumn =
Mutations.DeleteFromColumn("abc", "def", new BigtableVersionRange(-1, -1));
var request = new MutateRowRequest
{
Mutations =
{
Mutations.DeleteFromRow(),
setCell,
deleteFromColumn,
Mutations.DeleteFromFamily("abc")
}
};
Assert.True(request.IsIdempotent());
deleteFromColumn.DeleteFromColumn.TimeRange.StartTimestampMicros = -1;
deleteFromColumn.DeleteFromColumn.TimeRange.EndTimestampMicros = -1;
Assert.True(request.IsIdempotent());
setCell.SetCell.TimestampMicros = -1;
Assert.False(request.IsIdempotent());
}
public BigtableClientFixture()
{
BigtableClient bigtableClient = BigtableClient.Create();
_bigtableTableAdminClient = BigtableTableAdminClient.Create();
Table table = new Table
{
Granularity = Table.Types.TimestampGranularity.Millis
};
table.ColumnFamilies.Add("stats_summary", new ColumnFamily());
table.ColumnFamilies.Add("cell_plan", new ColumnFamily());
CreateTableRequest createTableRequest = new CreateTableRequest
{
ParentAsInstanceName = new InstanceName(projectId, instanceId),
Table = table,
TableId = tableId,
};
_bigtableTableAdminClient.CreateTable(createTableRequest);
TableName tableName = new TableName(projectId, instanceId, tableId);
BigtableVersion timestamp = new BigtableVersion(new DateTime(2020, 1, 10, 14, 0, 0, DateTimeKind.Utc));
BigtableVersion timestamp_minus_hr = new BigtableVersion(new DateTime(2020, 1, 10, 13, 0, 0, DateTimeKind.Utc));
MutateRowsRequest.Types.Entry[] entries =
{
Mutations.CreateEntry(new BigtableByteString("phone#4c410523#20190501"),
Mutations.SetCell("cell_plan", "data_plan_01gb", "false", timestamp),
Mutations.SetCell("cell_plan", "data_plan_01gb", "true", timestamp_minus_hr),
Mutations.SetCell("cell_plan", "data_plan_05gb", "true", timestamp),
Mutations.SetCell("stats_summary", "connected_cell", "1", timestamp),
Mutations.SetCell("stats_summary", "connected_wifi", "1", timestamp),
Mutations.SetCell("stats_summary", "os_build", "PQ2A.190405.003", timestamp)),
Mutations.CreateEntry(new BigtableByteString("phone#4c410523#20190502"),
Mutations.SetCell("cell_plan", "data_plan_05gb", "true", timestamp),
Mutations.SetCell("stats_summary", "connected_cell", "1", timestamp),
Mutations.SetCell("stats_summary", "connected_wifi", "1", timestamp),
Mutations.SetCell("stats_summary", "os_build", "PQ2A.190405.004", timestamp)),
Mutations.CreateEntry(new BigtableByteString("phone#4c410523#20190505"),
Mutations.SetCell("cell_plan", "data_plan_05gb", "true", timestamp),
Mutations.SetCell("stats_summary", "connected_cell", "0", timestamp),
Mutations.SetCell("stats_summary", "connected_wifi", "1", timestamp),
Mutations.SetCell("stats_summary", "os_build", "PQ2A.190406.000", timestamp)),
Mutations.CreateEntry(new BigtableByteString("phone#5c10102#20190501"),
Mutations.SetCell("cell_plan", "data_plan_10gb", "true", timestamp),
Mutations.SetCell("stats_summary", "connected_cell", "1", timestamp),
Mutations.SetCell("stats_summary", "connected_wifi", "1", timestamp),
Mutations.SetCell("stats_summary", "os_build", "PQ2A.190401.002", timestamp)),
Mutations.CreateEntry(new BigtableByteString("phone#5c10102#20190502"),
Mutations.SetCell("cell_plan", "data_plan_10gb", "true", timestamp),
Mutations.SetCell("stats_summary", "connected_cell", "1", timestamp),
Mutations.SetCell("stats_summary", "connected_wifi", "0", timestamp),
Mutations.SetCell("stats_summary", "os_build", "PQ2A.190406.000", timestamp))
};
bigtableClient.MutateRows(tableName, entries);
}
public void SetCell_NonIdempotent()
{
var mutation = Mutations.SetCell("abc", "cq1", "value", new BigtableVersion(-1));
Assert.True(mutation.IsIdempotent());
mutation.SetCell.TimestampMicros = -1;
Assert.False(mutation.IsIdempotent());
}
public void SetCell_String(string familyName)
{
var mutation =
Mutations.SetCell(familyName, "cq1", "value", new BigtableVersion(3));
Assert.NotNull(mutation.SetCell);
Assert.Equal(familyName, mutation.SetCell.FamilyName);
Assert.Equal("cq1", mutation.SetCell.ColumnQualifier.ToStringUtf8());
Assert.Equal("value", mutation.SetCell.Value.ToStringUtf8());
Assert.Equal(3000, mutation.SetCell.TimestampMicros);
}
private CheckAndMutateRowRequest ToMutateRowIfNotExistsRequest(IPersistentRepresentation persistent, ActorSystem system)
{
var request = new CheckAndMutateRowRequest();
request.TableNameAsTableName = _tableName;
var payload = PersistentToBytes(persistent, system);
request.PredicateFilter = RowFilters.PassAllFilter();
request.RowKey = ByteString.CopyFromUtf8(ToRowKeyString(persistent.PersistenceId, persistent.SequenceNr));
request.FalseMutations.Add(Mutations.SetCell(_family, PayloadColumnQualifier, payload, new BigtableVersion(-1)));
return(request);
}
public void SetCell_Bytes(string familyName)
{
var mutation =
Mutations.SetCell(familyName, "cq1", new BigtableByteString(1, 2, 3, 4, 5), new BigtableVersion(3));
Assert.NotNull(mutation.SetCell);
Assert.Equal(familyName, mutation.SetCell.FamilyName);
Assert.Equal("cq1", mutation.SetCell.ColumnQualifier.ToStringUtf8());
var bytes = mutation.SetCell.Value.ToByteArray();
Assert.Equal(new byte[] { 1, 2, 3, 4, 5 }, bytes);
Assert.Equal(3000, mutation.SetCell.TimestampMicros);
}
protected override async Task SaveAsync(SnapshotMetadata metadata, object snapshot)
{
var snapshotBytes = SnapshotToBytes(metadata, snapshot, Context.System);
byte[] snapshotMetadataBytes = SnapshotMetadataToBytes(metadata);
var request = new MutateRowRequest();
var version = new BigtableVersion(metadata.Timestamp.ToUniversalTime());
request.TableNameAsTableName = _tableName;
request.Mutations.Add(Mutations.SetCell(_family, SnapshotColumnQualifier, ByteString.CopyFrom(snapshotBytes), version));
request.Mutations.Add(Mutations.SetCell(_family, SnapshotMetaDataColumnQualifier, ByteString.CopyFrom(snapshotMetadataBytes), version));
request.RowKey = GetRowKey(metadata.PersistenceId, metadata.SequenceNr);
await _bigtableClient.MutateRowAsync(request).ConfigureAwait(false);
}
public void SetCell_Long(string familyName)
{
var mutation =
Mutations.SetCell(familyName, "cq1", 12345, new BigtableVersion(3));
Assert.NotNull(mutation.SetCell);
Assert.Equal(familyName, mutation.SetCell.FamilyName);
Assert.Equal("cq1", mutation.SetCell.ColumnQualifier.ToStringUtf8());
var bytes = mutation.SetCell.Value.ToByteArray();
if (BitConverter.IsLittleEndian)
{
Array.Reverse(bytes);
}
Assert.Equal(12345, BitConverter.ToInt64(bytes, 0));
Assert.Equal(3000, mutation.SetCell.TimestampMicros);
}
/// <summary>
/// Mutate multiple rows in an existing table and column family. Updates multiple cells within each row.
///</summary>
/// <param name="projectId">Your Google Cloud Project ID.</param>
/// <param name="instanceId">Your Google Cloud Bigtable Instance ID.</param>
/// <param name="tableId">Your Google Cloud Bigtable table ID.</param>
public string writeBatch(
string projectId = "YOUR-PROJECT-ID",
string instanceId = "YOUR-INSTANCE-ID",
string tableId = "YOUR-TABLE-ID")
{
BigtableClient bigtableClient = BigtableClient.Create();
TableName tableName = new TableName(projectId, instanceId, tableId);
BigtableVersion timestamp = new BigtableVersion(DateTime.UtcNow);
String COLUMN_FAMILY = "stats_summary";
MutateRowsRequest.Types.Entry mutations1 = Mutations.CreateEntry(new BigtableByteString("tablet#a0b81f74#20190501"),
Mutations.SetCell(COLUMN_FAMILY, "connected_cell", 1, timestamp),
Mutations.SetCell(COLUMN_FAMILY, "os_build", "12155.0.0-rc1", timestamp)
);
MutateRowsRequest.Types.Entry mutations2 = Mutations.CreateEntry(new BigtableByteString("tablet#a0b81f74#20190502"),
Mutations.SetCell(COLUMN_FAMILY, "connected_cell", 1, timestamp),
Mutations.SetCell(COLUMN_FAMILY, "os_build", "12145.0.0-rc6", timestamp)
);
MutateRowsRequest.Types.Entry[] entries =
{
mutations1,
mutations2
};
MutateRowsResponse mutateRowResponse = bigtableClient.MutateRows(tableName, entries);
foreach (MutateRowsResponse.Types.Entry entry in mutateRowResponse.Entries)
{
if (entry.Status.Code == 0)
{
Console.WriteLine($"Row {entry.Index} written successfully");
}
else
{
Console.WriteLine($"\tFailed to write row {entry.Index}");
Console.WriteLine(entry.Status.Message);
return(entry.Status.Message);
}
}
return("Successfully wrote 2 rows");
}
/// <summary>
/// Insert Test Data into Google Cloud Bigtable
/// </summary>
/// <returns></returns>
public bool InsertTestData(string columnName, string columnValue)
{
try
{
var bigtableClient = BigtableClient.Create();
List <Mutation> Cols = new List <Mutation>();
TableName _table = new TableName(ProjectId, InstanceId, TableName);
var request = new MutateRowsRequest
{
TableNameAsTableName = _table,
};
request.Entries.Add(Mutations.CreateEntry(Guid.NewGuid().ToString(),
Mutations.SetCell(ColumnFamily, columnName, columnValue)));
bigtableClient.MutateRows(request);
}
catch (Exception ex)
{
throw ex;
}
return(true);
}
public async Task InsertRowsAsync(
TableName tableName,
IEnumerable <BigtableByteString> rowKeys,
string familyName = null,
BigtableByteString?qualifierName = null,
BigtableByteString?valuePrefix = null,
BigtableVersion?version = null)
{
BigtableByteString rowKey = Guid.NewGuid().ToString();
familyName = familyName ?? ColumnFamily1;
qualifierName = qualifierName ?? "row_index";
valuePrefix = valuePrefix ?? "";
// TODO: Use cleaner API when available.
int counter = 0;
var request = new MutateRowsRequest
{
TableNameAsTableName = tableName,
Entries =
{
rowKeys.Select(k => new MutateRowsRequest.Types.Entry
{
RowKey = k.Value,
Mutations =
{
Mutations.SetCell(
familyName,
qualifierName.Value,
valuePrefix.Value.Value.Concat(new BigtableByteString(counter++).Value),
version)
}
})
}
};
var response = TableClient.MutateRows(request);
while (await response.ResponseStream.MoveNext(default))
protected override async Task DeleteMessagesToAsync(string persistenceId, long toSequenceNr)
{
var rows = RowSet.FromRowRanges(RowRange.Closed(ToRowKeyBigtableByteString(persistenceId, 0), ToRowKeyBigtableByteString(persistenceId, toSequenceNr)));
var stream = _bigtableClient.ReadRows(_tableName, rows: rows);
var deleteEntries = new List <MutateRowsRequest.Types.Entry>();
using (var enumerator = stream.GetEnumerator())
{
while (await enumerator.MoveNext().ConfigureAwait(false))
{
deleteEntries.Add(Mutations.CreateEntry(enumerator.Current.Key, Mutations.DeleteFromRow()));
}
}
if (deleteEntries.Any())
{
var last = deleteEntries.LastOrDefault();
deleteEntries.RemoveAt(deleteEntries.Count - 1);
deleteEntries.Add(Mutations.CreateEntry(last.RowKey, Mutations.SetCell(_family, PayloadColumnQualifier, ByteString.Empty, new BigtableVersion(-1))));
await _bigtableClient.MutateRowsAsync(_tableName, deleteEntries);
}
}
/// <summary>
/// Mutate one row in an existing table and column family. Updates multiple cells within that row using one API call.
///</summary>
/// <param name="projectId">Your Google Cloud Project ID.</param>
/// <param name="instanceId">Your Google Cloud Bigtable Instance ID.</param>
/// <param name="tableId">Your Google Cloud Bigtable table ID.</param>
public string writeSimple(
string projectId = "YOUR-PROJECT-ID",
string instanceId = "YOUR-INSTANCE-ID",
string tableId = "YOUR-TABLE-ID")
{
BigtableClient bigtableClient = BigtableClient.Create();
TableName tableName = new TableName(projectId, instanceId, tableId);
BigtableByteString rowkey = new BigtableByteString("phone#4c410523#20190501");
BigtableVersion timestamp = new BigtableVersion(DateTime.UtcNow);
String COLUMN_FAMILY = "stats_summary";
Mutation[] mutations =
{
Mutations.SetCell(COLUMN_FAMILY, "connected_cell", 1, timestamp),
Mutations.SetCell(COLUMN_FAMILY, "connected_wifi", 1, timestamp),
Mutations.SetCell(COLUMN_FAMILY, "os_build", "PQ2A.190405.003", timestamp)
};
MutateRowResponse mutateRowResponse = bigtableClient.MutateRow(tableName, rowkey, mutations);
Console.WriteLine(mutateRowResponse);
return($"Successfully wrote row {rowkey}");
}
/// <summary>
/// Check if a row has a certain value then mutate the row if it does.
///</summary>
/// <param name="projectId">Your Google Cloud Project ID.</param>
/// <param name="instanceId">Your Google Cloud Bigtable Instance ID.</param>
/// <param name="tableId">Your Google Cloud Bigtable table ID.</param>
public string writeConditional(
string projectId = "YOUR-PROJECT-ID",
string instanceId = "YOUR-INSTANCE-ID",
string tableId = "YOUR-TABLE-ID")
{
BigtableClient bigtableClient = BigtableClient.Create();
TableName tableName = new TableName(projectId, instanceId, tableId);
BigtableByteString rowkey = new BigtableByteString("phone#4c410523#20190501");
BigtableVersion timestamp = new BigtableVersion(DateTime.UtcNow);
String COLUMN_FAMILY = "stats_summary";
CheckAndMutateRowResponse checkAndMutateRowResponse = bigtableClient.CheckAndMutateRow(
tableName,
rowkey,
RowFilters.Chain(
RowFilters.FamilyNameExact(COLUMN_FAMILY),
RowFilters.ColumnQualifierExact("os_build"),
RowFilters.ValueRegex("PQ2A\\..*")),
Mutations.SetCell(COLUMN_FAMILY, "os_name", "android", timestamp));
return($"Successfully updated row's os_name: {checkAndMutateRowResponse.PredicateMatched}");
}
/// <summary>
/// Builds a <see cref="Mutation"/> for <see cref="MutateRowRequest"/> or an <see cref="MutateRowsRequest.Types.Entry"/>
/// </summary>
/// <param name="greetingNumber"> an index of a greeting</param>
private Mutation MutationBuilder(int greetingNumber) =>
Mutations.SetCell(_settings.ColumnFamily, $"field{greetingNumber}", _settings.Greetings[greetingNumber]);
// Builds a <see cref="Mutation"/> for <see cref="MutateRowRequest"/> or an <see cref="MutateRowsRequest.Types.Entry"/> private static Mutation MutationBuilder(int greetingNumber) => Mutations.SetCell(columnFamily, columnName, s_greetings[greetingNumber], new BigtableVersion(DateTime.UtcNow));
public void SetCellInvalidFamilyName(string familyName)
{
Assert.Throws <ArgumentException>(
() => Mutations.SetCell(familyName, default(string), default(string), null));
}
private static void DoHelloWorld()
{
try
{
// [START bigtable_hw_connect]
// BigtableTableAdminClient API lets us create, manage and delete tables.
BigtableTableAdminClient bigtableTableAdminClient = BigtableTableAdminClient.Create();
// BigtableClient API lets us read and write to a table.
BigtableClient bigtableClient = BigtableClient.Create();
// [END bigtable_hw_connect]
// [START bigtable_hw_create_table]
// Create a table with a single column family.
Console.WriteLine($"Create new table: {tableId} with column family: {columnFamily}, instance: {instanceId}");
// Check whether a table with given TableName already exists.
if (!TableExist(bigtableTableAdminClient))
{
bigtableTableAdminClient.CreateTable(
new InstanceName(projectId, instanceId),
tableId,
new Table
{
Granularity = Table.Types.TimestampGranularity.Millis,
ColumnFamilies =
{
{
columnFamily, new ColumnFamily
{
GcRule = new GcRule
{
MaxNumVersions = 1
}
}
}
}
});
// Confirm that table was created successfully.
Console.WriteLine(TableExist(bigtableTableAdminClient)
? $"Table {tableId} created successfully\n"
: $"There was a problem creating a table {tableId}");
}
else
{
Console.WriteLine($"Table: {tableId} already exists");
}
// [END bigtable_hw_create_table]
// [START bigtable_hw_write_rows]
// Initialize Google.Cloud.Bigtable.V2.TableName object.
Google.Cloud.Bigtable.Common.V2.TableName tableName = new Google.Cloud.Bigtable.Common.V2.TableName(projectId, instanceId, tableId);
// Write some rows
/* Each row has a unique row key.
*
* Note: This example uses sequential numeric IDs for simplicity, but
* this can result in poor performance in a production application.
* Since rows are stored in sorted order by key, sequential keys can
* result in poor distribution of operations across nodes.
*
* For more information about how to design a Bigtable schema for the
* best performance, see the documentation:
*
* https://cloud.google.com/bigtable/docs/schema-design */
Console.WriteLine($"Write some greetings to the table {tableId}");
// Insert 1 row using MutateRow()
s_greetingIndex = 0;
try
{
bigtableClient.MutateRow(tableName, rowKeyPrefix + s_greetingIndex, MutationBuilder());
Console.WriteLine($"\tGreeting: -- {s_greetings[s_greetingIndex],-18}-- written successfully");
}
catch (Exception ex)
{
Console.WriteLine($"\tFailed to write greeting: --{s_greetings[s_greetingIndex]}");
Console.WriteLine(ex.Message);
throw;
}
// Insert multiple rows using MutateRows()
// Build a MutateRowsRequest (contains table name and a collection of entries).
MutateRowsRequest request = new MutateRowsRequest
{
TableNameAsTableName = tableName
};
s_mapToOriginalGreetingIndex = new List <int>();
while (++s_greetingIndex < s_greetings.Length)
{
s_mapToOriginalGreetingIndex.Add(s_greetingIndex);
// Build an entry for every greeting (consists of rowkey and a collection of mutations).
string rowKey = rowKeyPrefix + s_greetingIndex;
request.Entries.Add(Mutations.CreateEntry(rowKey, MutationBuilder()));
}
// Make the request to write multiple rows.
MutateRowsResponse response = bigtableClient.MutateRows(request);
// Check the status code of each entry to ensure that it was written successfully.
foreach (MutateRowsResponse.Types.Entry entry in response.Entries)
{
s_greetingIndex = s_mapToOriginalGreetingIndex[(int)entry.Index];
if (entry.Status.Code == 0)
{
Console.WriteLine($"\tGreeting: -- {s_greetings[s_greetingIndex],-18}-- written successfully");
}
else
{
Console.WriteLine($"\tFailed to write greeting: --{s_greetings[s_greetingIndex]}");
Console.WriteLine(entry.Status.Message);
}
}
Mutation MutationBuilder() =>
Mutations.SetCell(columnFamily, columnName, s_greetings[s_greetingIndex], new BigtableVersion(DateTime.UtcNow));
//[END bigtable_hw_write_rows]
// [START bigtable_hw_create_filter]
RowFilter filter = RowFilters.CellsPerRowLimit(1);
// [END bigtable_hw_create_filter]
// [START bigtable_hw_get_with_filter]
// Read from the table.
Console.WriteLine("Read the first row");
int rowIndex = 0;
// Read a specific row. Apply a filter to return latest only cell value accross entire row.
Row rowRead = bigtableClient.ReadRow(
tableName, rowKey: rowKeyPrefix + rowIndex, filter: filter);
Console.WriteLine(
$"\tRow key: {rowRead.Key.ToStringUtf8()} " +
$" -- Value: {rowRead.Families[0].Columns[0].Cells[0].Value.ToStringUtf8(),-16} " +
$" -- Time Stamp: {rowRead.Families[0].Columns[0].Cells[0].TimestampMicros}");
// [END bigtable_hw_get_with_filter]
// [START bigtable_hw_scan_with_filter]
Console.WriteLine("Read all rows using streaming");
// stream the content of the whole table. Apply a filter to return latest only cell values accross all rows.
ReadRowsStream responseRead = bigtableClient.ReadRows(tableName, filter: filter);
Task printRead = PrintReadRowsAsync();
printRead.Wait();
async Task PrintReadRowsAsync()
{
await responseRead.ForEachAsync(row =>
{
Console.WriteLine($"\tRow key: {row.Key.ToStringUtf8()} " +
$" -- Value: {row.Families[0].Columns[0].Cells[0].Value.ToStringUtf8(),-16} " +
$" -- Time Stamp: {row.Families[0].Columns[0].Cells[0].TimestampMicros}");
});
}
// [END bigtable_hw_scan_with_filter]
// [START bigtable_hw_delete_table]
// Clean up. Delete the table.
Console.WriteLine($"Delete table: {tableId}");
bigtableTableAdminClient.DeleteTable(name: tableName);
if (!TableExist(bigtableTableAdminClient))
{
Console.WriteLine($"Table: {tableId} deleted successfully");
}
// [END bigtable_hw_delete_table]
}
catch (Exception ex)
{
Console.WriteLine($"Exception while running HelloWorld: {ex.Message}");
}
}
Enumerable.Range(0, entryCount).Select(i =>
Mutations.CreateEntry("Row" + i, Mutations.SetCell("Family" + i, default, default)))