private async Task <MsgOp> DoRequestAsync(string subject, ReadOnlyMemory <byte> body, CancellationToken cancellationToken = default)
{
var replyToSubject = UniqueId.Generate();
var taskComp = new TaskCompletionSource <MsgOp>();
using var _ = MsgOpStream
.WhereSubjectMatches(replyToSubject)
.SubscribeSafe(msg => taskComp.SetResult(msg), ex => taskComp.SetException(ex));
using var cts = cancellationToken == default
? new CancellationTokenSource(_connectionInfo.RequestTimeoutMs)
: CancellationTokenSource.CreateLinkedTokenSource(_cancellation.Token, cancellationToken);
await using var __ = cts.Token.Register(() => taskComp.SetCanceled()).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
await _connection.WithWriteLockAsync(async (writer, arg) =>
{
var(subjectIn, bodyIn, replyToIn) = arg;
var sid = UniqueId.Generate().AsMemory();
await SubCmd.WriteAsync(writer, replyToIn, sid, ReadOnlyMemory <char> .Empty).ConfigureAwait(false);
await UnsubCmd.WriteAsync(writer, sid, 1).ConfigureAwait(false);
await writer.FlushAsync().ConfigureAwait(false);
await PubCmd.WriteAsync(writer, subjectIn, replyToIn, bodyIn).ConfigureAwait(false);
await writer.FlushAsync().ConfigureAwait(false);
}, Tuple.Create(subject.AsMemory(), body, replyToSubject.AsMemory())).ConfigureAwait(false);
return(await taskComp.Task.ConfigureAwait(false));
}
private async Task DoSubAsync(SubscriptionInfo subscriptionInfo) => await _connection.WithWriteLockAsync(async writer =>
{
await writer.WriteAsync(SubCmd.Generate(subscriptionInfo.Subject, subscriptionInfo.Id, subscriptionInfo.QueueGroup)).ConfigureAwait(false);
if (subscriptionInfo.MaxMessages.HasValue)
{
await writer.WriteAsync(UnsubCmd.Generate(subscriptionInfo.Id, subscriptionInfo.MaxMessages)).ConfigureAwait(false);
}
await writer.FlushAsync().ConfigureAwait(false);
}).ConfigureAwait(false);
private void DoSub(SubscriptionInfo subscriptionInfo) => _connection.WithWriteLock(writer =>
{
writer.Write(SubCmd.Generate(subscriptionInfo.Subject, subscriptionInfo.Id, subscriptionInfo.QueueGroup));
if (subscriptionInfo.MaxMessages.HasValue)
{
writer.Write(UnsubCmd.Generate(subscriptionInfo.Id, subscriptionInfo.MaxMessages));
}
writer.Flush();
});
private void DoSub(SubscriptionInfo subscriptionInfo) => _connection.WithWriteLock((writer, arg) =>
{
var sid = arg.Id.AsSpan();
SubCmd.Write(writer, arg.Subject, sid, arg.QueueGroup);
if (arg.MaxMessages.HasValue)
{
UnsubCmd.Write(writer, sid, arg.MaxMessages);
}
writer.Flush();
}, subscriptionInfo);
private async Task <MsgOp> DoRequestAsync(string subject, byte[] body, int?timeoutMs)
{
var requestReplyAddress = $"{Guid.NewGuid():N}";
var pubCmd = PubCmd.Generate(subject, body, requestReplyAddress);
var taskComp = new TaskCompletionSource <MsgOp>();
var requestSubscription = MsgOpStream.Where(msg => msg.Subject == requestReplyAddress).Subscribe(
msg => taskComp.SetResult(msg),
ex => taskComp.SetException(ex));
var subscriptionInfo = new SubscriptionInfo(requestReplyAddress, maxMessages: 1);
var subCmd = SubCmd.Generate(subscriptionInfo.Subject, subscriptionInfo.Id);
var unsubCmd = UnsubCmd.Generate(subscriptionInfo.Id, subscriptionInfo.MaxMessages);
await _connection.WithWriteLockAsync(async writer =>
{
await writer.WriteAsync(subCmd).ConfigureAwait(false);
await writer.WriteAsync(unsubCmd).ConfigureAwait(false);
await writer.FlushAsync().ConfigureAwait(false);
await writer.WriteAsync(pubCmd).ConfigureAwait(false);
await writer.FlushAsync().ConfigureAwait(false);
}).ConfigureAwait(false);
Task.WaitAny(new[] { Task.Delay(timeoutMs ?? _connectionInfo.RequestTimeoutMs), taskComp.Task }, _cancellation.Token);
if (!taskComp.Task.IsCompleted)
{
taskComp.SetException(NatsException.RequestTimedOut());
}
return(await taskComp.Task
.ContinueWith(t =>
{
requestSubscription?.Dispose();
if (!t.IsFaulted)
{
return t.Result;
}
var ex = t.Exception?.GetBaseException() ?? t.Exception;
if (ex == null)
{
return t.Result;
}
_logger.Error("Exception while performing request.", ex);
throw ex;
})
.ConfigureAwait(false));
}
private Task DoSubAsync(SubscriptionInfo subscriptionInfo) =>
_connection.WithWriteLockAsync(async(writer, arg) =>
{
var sid = arg.Id.AsMemory();
await SubCmd.WriteAsync(writer, arg.Subject.AsMemory(), sid, arg.QueueGroup.AsMemory())
.ConfigureAwait(false);
if (arg.MaxMessages.HasValue)
{
await UnsubCmd.WriteAsync(writer, sid, arg.MaxMessages).ConfigureAwait(false);
}
await writer.FlushAsync().ConfigureAwait(false);
}, subscriptionInfo);
private async Task <MsgOp> DoRequestUsingInboxAsync(string subject, ReadOnlyMemory <byte> body, CancellationToken cancellationToken = default)
{
var requestId = UniqueId.Generate();
var replyToSubject = $"{_inboxAddress}.{requestId}";
var taskComp = new TaskCompletionSource <MsgOp>();
if (!_outstandingRequests.TryAdd(requestId, taskComp))
{
throw NatsException.InitRequestError("Unable to initiate request.");
}
using var cts = cancellationToken == default
? new CancellationTokenSource(_connectionInfo.RequestTimeoutMs)
: CancellationTokenSource.CreateLinkedTokenSource(_cancellation.Token, cancellationToken);
await using var _ = cts.Token.Register(() =>
{
if (_outstandingRequests.TryRemove(requestId, out var ts))
{
ts.TrySetCanceled();
}
}).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
await _connection.WithWriteLockAsync(async (writer, arg) =>
{
var(subjectIn, bodyIn, replyToIn) = arg;
if (_inboxSubscription == null)
{
SetupInboxSubscription();
await SubCmd.WriteAsync(
writer,
_inboxSubscription.SubscriptionInfo.Subject.AsMemory(),
_inboxSubscription.SubscriptionInfo.Id.AsMemory(),
_inboxSubscription.SubscriptionInfo.QueueGroup.AsMemory()).ConfigureAwait(false);
}
await PubCmd.WriteAsync(writer, subjectIn, replyToIn, bodyIn).ConfigureAwait(false);
await writer.FlushAsync().ConfigureAwait(false);
}, Tuple.Create(subject.AsMemory(), body, replyToSubject.AsMemory())).ConfigureAwait(false);
return(await taskComp.Task.ConfigureAwait(false));
}
private Task DoSubAsync(SubscriptionInfo[] subscriptionInfos) =>
_connection.WithWriteLockAsync(async(writer, arg) =>
{
foreach (var subscriptionInfo in arg)
{
var sid = subscriptionInfo.Id.AsMemory();
await SubCmd.WriteAsync(writer, subscriptionInfo.Subject.AsMemory(), sid, subscriptionInfo.QueueGroup.AsMemory())
.ConfigureAwait(false);
if (subscriptionInfo.MaxMessages.HasValue)
{
await UnsubCmd.WriteAsync(writer, sid, subscriptionInfo.MaxMessages).ConfigureAwait(false);
}
await writer.FlushAsync().ConfigureAwait(false);
}
}, subscriptionInfos);
/// <summary>
///
/// </summary>
/// <param name="ctype"></param>
/// <param name="CheckSumLength"></param>
/// <param name="mcmd"></param>
/// <param name="scmd"></param>
/// <param name="dataArea"></param>
/// <param name="beginAddress"></param>
/// <param name="length"></param>
/// <param name="writeValue"></param>//if read,writevalue=null
/// <returns></returns>
public string CreateMsg(CommunicationType ctype, string RequestDataLength, MainCmd mcmd, SubCmd scmd, string dataArea, string beginAddress, string length, string writeValue)
{
MCcmd mc = new MCcmd();
string mcMsg = null;
if (ctype == 0)
{
mcMsg = mc.SubTitleNumber + mc.NetwrokNumber + mc.PcNumber + GetDescription(IOnumber.ascii) + mc.ChannelNumber + RequestDataLength
+ GetDescription(Cpu_time.ascii) + string.Format("{0:X4}", mcmd.GetHashCode()) + string.Format("{0:X4}", scmd.GetHashCode())
+ GetDescription((DataArea_ASCII)Enum.Parse(typeof(DataArea_ASCII), dataArea)) + beginAddress + length + writeValue;
}
else
{
mcMsg = mc.SubTitleNumber + mc.NetwrokNumber + mc.PcNumber + GetDescription(IOnumber.bin) + mc.ChannelNumber + RequestDataLength
+ GetDescription(Cpu_time.bin) + string.Format("{0:X4}", mcmd.GetHashCode()) + string.Format("{0:X4}", scmd.GetHashCode())
+ beginAddress + string.Format("{0:X}", (int)Enum.Parse(typeof(DataArea_BIN), dataArea)) + length + writeValue;
}
return(mcMsg);
}