public async IAsyncEnumerator <IQueryResult> GetAsyncEnumerator(
CancellationToken cancellationToken = default)
{
try
{
IOperationContext context = _operationContextOwner.OperationContext;
while (context.Execution.DeferredTaskBacklog.TryTake(
out IDeferredExecutionTask? deferredTask))
{
if (cancellationToken.IsCancellationRequested)
{
break;
}
context.Result.Clear();
context.Execution.Reset();
yield return(await deferredTask.ExecuteAsync(context).ConfigureAwait(false));
}
}
finally
{
_operationContextOwner.Dispose();
}
}
public async IAsyncEnumerator <IQueryResult> GetAsyncEnumerator(
CancellationToken cancellationToken = default)
{
try
{
IOperationContext context = _operationContextOwner.OperationContext;
while (context.Scheduler.DeferredWork.TryTake(
out IDeferredExecutionTask? deferredTask))
{
if (cancellationToken.IsCancellationRequested)
{
break;
}
// we ensure that the previous results are cleared.
context.ClearResult();
// next we execute the deferred task.
var result = await deferredTask.ExecuteAsync(context).ConfigureAwait(false);
// if we get a result we will yield it to the consumer of the result stream.
if (result is not null)
{
yield return(result);
}
// if null is returned and there are no more deferred tasks we will
// yield a termination result which signals to the consumer that
// no more results will follow.
else if (!context.Scheduler.DeferredWork.HasWork)
{
yield return(context.ClearResult().TrySetNext(true).BuildResult());
}
}
}
finally
{
_operationContextOwner.Dispose();
}
}
