public void TransactionTagCannotBeSetForReadOnlyTransaction()
{
Mock <SpannerClient> spannerClientMock = SpannerClientHelpers
.CreateMockClient(Logger.DefaultLogger, MockBehavior.Strict);
spannerClientMock
.SetupBatchCreateSessionsAsync()
.SetupBeginTransactionAsync();
SpannerConnection connection = BuildSpannerConnection(spannerClientMock);
SpannerTransaction transaction = connection.BeginReadOnlyTransaction();
Assert.Throws <InvalidOperationException>(() => transaction.Tag = "transaction-tag-1");
}
/// <summary>
/// TransactionId and CommandPartition are serializable.
/// </summary>
private async Task DistributedReadWorkerAsync(CommandPartition readPartition, TransactionId id)
{
//note: we only use state provided by the arguments here.
using (var connection = new SpannerConnection(id.ConnectionString))
using (var transaction = connection.BeginReadOnlyTransaction(id))
{
using (var cmd = connection.CreateCommandWithPartition(readPartition, transaction))
{
using (var reader = await cmd.ExecuteReaderAsync().ConfigureAwait(false))
{
while (await reader.ReadAsync())
{
Interlocked.Increment(ref _rowsRead);
}
}
}
}
}
private async Task DistributedReadWorkerAsync(CommandPartition readPartition, TransactionId id)
{
var localId = Interlocked.Increment(ref _partitionCount);
using var connection = new SpannerConnection(id.ConnectionString);
using var transaction = connection.BeginReadOnlyTransaction(id);
using var cmd = connection.CreateCommandWithPartition(readPartition, transaction);
using var reader = await cmd.ExecuteReaderAsync();
while (await reader.ReadAsync())
{
Interlocked.Increment(ref _rowsRead);
Console.WriteLine($"Partition ({localId}) "
+ $"{reader.GetFieldValue<int>("SingerId")}"
+ $" {reader.GetFieldValue<string>("FirstName")}"
+ $" {reader.GetFieldValue<string>("LastName")}");
}
Console.WriteLine($"Done with single reader {localId}.");
}
