public void Unsub(SubscriptionInfo subscriptionInfo)
{
if (subscriptionInfo == null)
{
throw new ArgumentNullException(nameof(subscriptionInfo));
}
if (!TryRemoveSubscription(subscriptionInfo))
{
return;
}
if (!IsConnected)
{
return;
}
ThrowIfDisposed();
ThrowIfNotConnected();
_connection.WithWriteLock((writer, arg) =>
{
UnsubCmd.Write(writer, arg.Id, arg.MaxMessages);
writer.Flush();
}, subscriptionInfo);
}
public async Task UnsubAsync(SubscriptionInfo subscriptionInfo)
{
if (subscriptionInfo == null)
{
throw new ArgumentNullException(nameof(subscriptionInfo));
}
if (!TryRemoveSubscription(subscriptionInfo))
{
return;
}
if (!IsConnected)
{
return;
}
ThrowIfDisposed();
ThrowIfNotConnected();
await _connection.WithWriteLockAsync(async (writer, arg) =>
{
await UnsubCmd.WriteAsync(writer, arg.Id.AsMemory(), arg.MaxMessages).ConfigureAwait(false);
await writer.FlushAsync().ConfigureAwait(false);
}, subscriptionInfo).ConfigureAwait(false);
}
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));
}
public async Task UnsubAsync(SubscriptionInfo subscriptionInfo)
{
EnsureArg.IsNotNull(subscriptionInfo, nameof(subscriptionInfo));
ThrowIfDisposed();
if (!TryRemoveSubscription(subscriptionInfo))
{
return;
}
if (!IsConnected)
{
return;
}
var cmdPayload = UnsubCmd.Generate(subscriptionInfo.Id, subscriptionInfo.MaxMessages);
await _connection.WithWriteLockAsync(async writer =>
{
if (!IsConnected)
{
return;
}
await writer.WriteAsync(cmdPayload).ConfigureAwait(false);
await writer.FlushAsync().ConfigureAwait(false);
}).ConfigureAwait(false);
}
public void Unsub(SubscriptionInfo subscriptionInfo)
{
EnsureArg.IsNotNull(subscriptionInfo, nameof(subscriptionInfo));
ThrowIfDisposed();
if (!TryRemoveSubscription(subscriptionInfo))
{
return;
}
if (!IsConnected)
{
return;
}
var cmdPayload = UnsubCmd.Generate(subscriptionInfo.Id, subscriptionInfo.MaxMessages);
_connection.WithWriteLock(writer =>
{
if (!IsConnected)
{
return;
}
writer.Write(cmdPayload);
writer.Flush();
});
}
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 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);
