public async Task <StreamMetadataResult> GetStreamMetadataAsync(string streamName,
UserCredentials userCredentials = default, CancellationToken cancellationToken = default)
{
ResolvedEvent metadata = default;
try {
metadata = await ReadStreamAsync(Direction.Backwards, SystemStreams.MetastreamOf(streamName), StreamRevision.End, 1,
false,
userCredentials : userCredentials,
cancellationToken : cancellationToken).FirstOrDefaultAsync(cancellationToken).ConfigureAwait(false);
} catch (StreamNotFoundException) {
return(StreamMetadataResult.None(streamName));
}
return(metadata.Event == null
? StreamMetadataResult.None(streamName)
: StreamMetadataResult.Create(
streamName,
metadata.OriginalEventNumber,
JsonSerializer.Deserialize <StreamMetadata>(metadata.Event.Data, StreamMetadataJsonSerializerOptions)));
}
private async Task <StreamMetadataResult> GetStreamMetadataAsync(string streamName,
EventStoreClientOperationOptions operationOptions, UserCredentials?userCredentials = null,
CancellationToken cancellationToken = default)
{
ResolvedEvent metadata;
_log.LogDebug("Read stream metadata for {streamName}.");
try {
metadata = await ReadStreamAsync(Direction.Backwards, SystemStreams.MetastreamOf(streamName), StreamPosition.End, 1, operationOptions, false, userCredentials, cancellationToken)
.FirstOrDefaultAsync(cancellationToken).ConfigureAwait(false);
} catch (StreamNotFoundException) {
_log.LogWarning("Stream metadata for {streamName} not found.");
return(StreamMetadataResult.None(streamName));
}
return(metadata.Event == null
? StreamMetadataResult.None(streamName)
: StreamMetadataResult.Create(streamName, metadata.OriginalEventNumber,
JsonSerializer.Deserialize <StreamMetadata>(metadata.Event.Data.Span,
StreamMetadataJsonSerializerOptions)));
}