nc, err := nats.Connect("demo.nats.io")
if err != nil {
	log.Fatal(err)
}
defer nc.Close()

// Use a WaitGroup to wait for a message to arrive
wg := sync.WaitGroup{}
wg.Add(1)

// Subscribe
if _, err := nc.Subscribe("updates", func(m *nats.Msg) {
	wg.Done()
}); err != nil {
	log.Fatal(err)
}

// Wait for a message to come in
wg.Wait()

// Close the connection
nc.Close()

Connection nc = Nats.connect("nats://demo.nats.io:4222");

// Use a latch to wait for a message to arrive
CountDownLatch latch = new CountDownLatch(1);

// Create a dispatcher and inline message handler
Dispatcher d = nc.createDispatcher((msg) -> {
    String str = new String(msg.getData(), StandardCharsets.UTF_8);
    System.out.println(str);
    latch.countDown();
});

// Subscribe
d.subscribe("updates");

// Wait for a message to come in
latch.await(); 

// Close the connection
nc.close();

let nc = NATS.connect({
    url: "nats://demo.nats.io:4222"
});
nc.subscribe("updates", (msg) => {
    t.log(msg);
});

nc = NATS()

await nc.connect(servers=["nats://demo.nats.io:4222"])

future = asyncio.Future()

async def cb(msg):
  nonlocal future
  future.set_result(msg)

await nc.subscribe("updates", cb=cb)
await nc.publish("updates", b'All is Well')
await nc.flush()

# Wait for message to come in
msg = await asyncio.wait_for(future, 1)

require 'nats/client'

NATS.start(servers:["nats://127.0.0.1:4222"]) do |nc|
  nc.subscribe("updates") do |msg|
    puts msg
    nc.close
  end

  nc.publish("updates", "All is Well")
end

nc.subscribe("updates", (err, msg) => {
    if(err) {
        console.log('error', err);
    } else {
        t.log(msg.data);
    }
});