public async Task When_writing_to_existing_stream_null_stream_properties()
{
var properties = new
{
Property1 = "Foo",
Property2 = 42
};
var stream = new Stream(partition, StreamProperties.From(properties));
var result = await Stream.WriteAsync(stream, CreateEvent("e1"), CreateEvent("e2"));
stream = result.Stream;
AssertNewStream(result, 2, properties);
AssertStreamEntity(2, properties);
var restored = Stream.From(partition, stream.ETag, stream.Version, properties: null);
result = await Stream.WriteAsync(restored, CreateEvent("e3"));
AssertNewStream(result, 3, new {});
AssertStreamEntity(3, properties);
}
/// <summary>
/// This the simplest approach. You just need to create an additional stream metadata column and then you can simply query on it.
///
/// It's also the slowest approach of all, since all rows in a partition need to scanned. Still, it should
/// perform quite well for majority of apps as there won't be too many rows in a single physical partition.
/// </summary>
async Task MultipleStreamsPerPartitionUsingStreamProperties()
{
var properties = StreamProperties.From(new { RowType = "STREAM" });
await Stream.ProvisionAsync(VirtualPartition("11"), properties);
await Stream.ProvisionAsync(VirtualPartition("22"), properties);
// the below code will scan all rows in a single physical partition
// also, if there more than 1000 streams (header rows), pagination need to be utilized as per regular ATS limits
var filter = TableQuery.CombineFilters(
TableQuery.GenerateFilterCondition("PartitionKey", QueryComparisons.Equal, Partition.PartitionKey),
TableOperators.And,
TableQuery.GenerateFilterCondition(nameof(StreamHeaderEntity.RowType), QueryComparisons.Equal, "STREAM")
);
var count = Partition.Table
.ExecuteQuery <StreamHeaderEntity>(filter)
.Count();
Console.WriteLine(count);
}