private IEnumerable <Task> _executeAsync(TaskCompletionSource <HttpStatusCode> tcs, int instance, Proposal <string, SerialilzableWebRequest> proposal)
{
Action <string> trace = s => FUSE.Paxos.Events.TraceInfo(s, proposal.guid, _paxos.Self, instance, proposal.value.Headers["x-ms-client-request-id"] ?? "");
trace("ExecuteAsync Enter");
var getResponseTask = Concurrency.RetryOnFaultOrCanceledAsync <HttpWebResponse>(() => GetResponse(proposal.value), t => ShouldRetryGetResponse(t, instance, proposal.guid), 1000);
yield return(getResponseTask);
trace("ExecuteAsync ResponseReceived");
if (!proposal.value.Method.Equals("GET", StringComparison.InvariantCultureIgnoreCase))
{
var logTask = Concurrency.RetryOnFaultOrCanceledAsync(() => LogResultAsync(instance), _ => true, 1000);
yield return(logTask);
try
{
logTask.Wait();
trace("ExecuteAsync Logged");
}
catch (Exception e)
{
Validation.TraceException(e, "Exception incrementing LSN");
}
}
TaskCompletionSource <HttpWebResponse> completion;
if (completions.TryGetValue(proposal.guid, out completion))
{
completion.SetFromTask(getResponseTask);
completions.Remove(proposal.guid);
}
tcs.SetResult(GetStatusCode(getResponseTask));
trace("ExecuteAsync Exit");
}