MyNatsClient.Encodings.Json 0.13.0

Pub-Sub sample

Simple pub-sub sample showing one client that publishes and one that subscribes. This can of course be the same client and you can also have more clients subscribing etc.

Publisher

var cnInfo = new ConnectionInfo("192.168.1.10");
var client = new NatsClient(cnInfo);

await client.PubAsync("tick", GetNextTick());

//or using an encoding package e.g. Json
await client.PubAsJsonAsync("tickItem", new Tick { Value = GetNextTick() });

Subscriber

var cnInfo = new ConnectionInfo("192.168.1.10");
var client = new NatsClient(cnInfo);

await client.SubAsync("tick", stream => stream.Subscribe(msg => {
    Console.WriteLine($"Clock ticked. Tick is {msg.GetPayloadAsString()}");
}));

//or using an encoding package e.g Json
await client.SubAsync("tickItem", stream => stream.Subscribe(msg => {
    Console.WriteLine($"Clock ticked. Tick is {msg.FromJson<TestItem>().Value}");
}))

Stream.Subscribe vs Stream.SubscribeSafe

If you subscribe to e.g. the MessageOpStream using Stream.Subscribe and your handler is throwing an exception. That handler will get OnError invoked and then removed.

await client.SubAsync("mySubject", stream => stream.Subscribe(msg => DoSomething(msg)));

If you instead subscribe using Stream.SubscribeSafe any unhandled exception will get swallowed.

await client.SubAsync("mySubject", stream => stream.SubscribeSafe(msg => DoSomething(msg)));

Request-Response sample

Simple request-response sample. This sample also makes use of two clients. It can of course be the same client requesting and responding, you can also have more responders forming a queue group. Where one will be giving the answer.

Requester

var cnInfo = new ConnectionInfo("192.168.1.10");
var client = new NatsClient(cnInfo);

var response = await client.RequestAsync("getTemp", "stockholm@sweden");
Console.WriteLine($"Temp in Stockholm is {response.GetPayloadAsString()}");

Responder

var cnInfo = new ConnectionInfo("192.168.1.10");
var client = new NatsClient(cnInfo);

await client.SubAsync("getTemp", stream.Subscribe(msg => {
    client.Pub(msg.ReplyTo, getTemp(msg.GetPayloadAsString()));
}));