private async Task RxSubscriber(string dataCentre, CancellationToken token)
{
var clusterId = "test-cluster";
var clientId = Guid.NewGuid().ToString("N");
var stanOptions = StanOptions.GetDefaultOptions();
stanOptions.NatsURL = _natsClusterNodes[dataCentre];
using var stanConnection = new StanConnectionFactory().CreateConnection(clusterId, clientId, stanOptions);
var messagesSubject = stanConnection.Observe("foo");
var loopCount = 0;
messagesSubject.Subscribe(onNext: (message) =>
{
Console.WriteLine(
$"{dataCentre}: received '{System.Text.Encoding.UTF8.GetString(message.Data)}'. Redelivered: {message.Redelivered}. Sequence: {message.Sequence}");
Console.WriteLine($"loopCount: {Interlocked.Increment(ref loopCount)}");
});
await Task.Delay(1000000, token);
Console.WriteLine("Exiting subscription");
}
static void Main(string[] args)
{
var clusterId = "test-cluster";
var clientId = Guid.NewGuid().ToString("N");
using (var cn = new StanConnectionFactory().CreateConnection(clusterId, clientId))
{
var cts = new CancellationTokenSource();
Task.Run(() =>
{
var temperatures =
cn.Observe("temperatures")
.Where(m => m.Data?.Any() == true)
.Select(m => BitConverter.ToInt32(m.Data, 0));
temperatures.Subscribe(t => Console.WriteLine($"{t}C"));
temperatures.Subscribe(t => Console.WriteLine($"{(t * 9 / 5) + 32}F"));
}, cts.Token);
Task.Run(async() =>
{
var rnd = new Random();
while (!cts.IsCancellationRequested)
{
cn.Publish("temperatures", BitConverter.GetBytes(rnd.Next(-10, 40)));
await Task.Delay(1000, cts.Token);
}
}, cts.Token);
Console.WriteLine("Hit any key to exit");
Console.ReadKey();
cts.Cancel();
}
}