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

// Use a WaitGroup to wait for 4 messages to arrive
wg := sync.WaitGroup{}
wg.Add(4)

// Subscribe
if _, err := nc.Subscribe("time.>", func(m *nats.Msg) {
	log.Printf("%s: %s", m.Subject, m.Data)
	wg.Done()
}); err != nil {
	log.Fatal(err)
}

// Wait for the 4 messages 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 4 messages to arrive
CountDownLatch latch = new CountDownLatch(4);

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

// Subscribe
d.subscribe("time.>");

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

// Close the connection
nc.close();

let nc = NATS.connect({
    url: "nats://demo.nats.io:4222"});

nc.subscribe('time.>', (msg, reply, subject) => {
    // converting timezones correctly in node requires a library
    // this doesn't take into account *many* things.
    let time = "";
    switch (subject) {
        case 'time.us.east':
            time = new Date().toLocaleTimeString("en-us", {timeZone: "America/New_York"});
            break;
        case 'time.us.central':
            time = new Date().toLocaleTimeString("en-us", {timeZone: "America/Chicago"});
            break;
        case 'time.us.mountain':
            time = new Date().toLocaleTimeString("en-us", {timeZone: "America/Denver"});
            break;
        case 'time.us.west':
            time = new Date().toLocaleTimeString("en-us", {timeZone: "America/Los_Angeles"});
            break;
        default:
            time = "I don't know what you are talking about Willis";
    }
    t.log(subject, time);
});

nc = NATS()

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

# Use queue to wait for 4 messages to arrive
queue = asyncio.Queue()
async def cb(msg):
  await queue.put(msg)

await nc.subscribe("time.>", cb=cb)

# Send 2 messages and wait for them to come in
await nc.publish("time.A.east", b'A')
await nc.publish("time.B.east", b'B')
await nc.publish("time.C.west", b'C')
await nc.publish("time.D.west", b'D')

for i in range(0, 4):
  msg = await queue.get()
  print("Msg:", msg)

await nc.close()

require 'nats/client'
require 'fiber'

NATS.start(servers:["nats://127.0.0.1:4222"]) do |nc|
  Fiber.new do
    f = Fiber.current

    nc.subscribe("time.>") do |msg, reply|
      f.resume Time.now.to_f
    end

    nc.publish("time.A.east", "A")
    nc.publish("time.B.east", "B")
    nc.publish("time.C.west", "C")
    nc.publish("time.D.west", "D")

    # Use the response
    4.times do 
      msg = Fiber.yield
      puts "Msg: #{msg}"
    end
  end.resume
end

await nc.subscribe('time.>', (err, msg) => {
    // converting timezones correctly in node requires a library
    // this doesn't take into account *many* things.
    let time = "";
    switch (msg.subject) {
        case 'time.us.east':
            time = new Date().toLocaleTimeString("en-us", {timeZone: "America/New_York"});
            break;
        case 'time.us.central':
            time = new Date().toLocaleTimeString("en-us", {timeZone: "America/Chicago"});
            break;
        case 'time.us.mountain':
            time = new Date().toLocaleTimeString("en-us", {timeZone: "America/Denver"});
            break;
        case 'time.us.west':
            time = new Date().toLocaleTimeString("en-us", {timeZone: "America/Los_Angeles"});
            break;
        default:
            time = "I don't know what you are talking about Willis";
    }
    t.log(msg.subject, time);
});