internal async Task <GenericCommand> SendRequest(GenericCommand request)
{
if (IsIdempotentCommand(request))
{
GenericCommand sendingReq = requestToResponses.Keys.FirstOrDefault(item => {
// TRICK 除了 I 其他字段相等
request.I = item.I;
return(Equals(request, item));
});
if (sendingReq != null)
{
LCLogger.Warn("duplicated request");
if (requestToResponses.TryGetValue(sendingReq, out TaskCompletionSource <GenericCommand> waitingTcs))
{
return(await waitingTcs.Task);
}
LCLogger.Error($"error request: {request}");
}
}
TaskCompletionSource <GenericCommand> tcs = new TaskCompletionSource <GenericCommand>();
request.I = requestI++;
requestToResponses.Add(request, tcs);
try {
await SendCommand(request);
} catch (Exception e) {
tcs.TrySetException(e);
}
return(await tcs.Task);
}
