public override async Task <CosmosContainerResponse> CreateContainerIfNotExistsAsync(
CosmosContainerSettings containerSettings,
int?throughput = null,
CosmosRequestOptions requestOptions = null,
CancellationToken cancellationToken = default(CancellationToken))
{
if (containerSettings == null)
{
throw new ArgumentNullException(nameof(containerSettings));
}
this.ValidateContainerSettings(containerSettings);
CosmosContainer cosmosContainer = this[containerSettings.Id];
CosmosContainerResponse cosmosContainerResponse = await cosmosContainer.ReadAsync(cancellationToken : cancellationToken);
if (cosmosContainerResponse.StatusCode != HttpStatusCode.NotFound)
{
return(cosmosContainerResponse);
}
cosmosContainerResponse = await this.CreateContainerAsync(containerSettings, throughput, requestOptions, cancellationToken : cancellationToken);
if (cosmosContainerResponse.StatusCode != HttpStatusCode.Conflict)
{
return(cosmosContainerResponse);
}
// This second Read is to handle the race condition when 2 or more threads have Read the database and only one succeeds with Create
// so for the remaining ones we should do a Read instead of throwing Conflict exception
return(await cosmosContainer.ReadAsync(cancellationToken : cancellationToken));
}
internal CosmosContainerResponse CreateContainerResponse(
CosmosResponseMessage cosmosResponseMessage,
CosmosContainer container)
{
return(CosmosContainerResponse.CreateResponse(
cosmosResponseMessage,
this.jsonSerializer,
container));
}
