mirror of
				https://github.com/taigrr/nats.docs
				synced 2025-01-18 04:03:23 -08:00 
			
		
		
		
	
		
			
				
	
	
		
			145 lines
		
	
	
		
			6.0 KiB
		
	
	
	
		
			HTML
		
	
	
	
	
	
			
		
		
	
	
			145 lines
		
	
	
		
			6.0 KiB
		
	
	
	
		
			HTML
		
	
	
	
	
	
| 
 | |
| <div class="tab-wrap">
 | |
|   	
 | |
| 	
 | |
| 	<input type="radio" id="subscribe_queue_go" name="subscribe_queue" class="tab" checked>
 | |
| 	
 | |
| 	<label for="subscribe_queue_go" class="api-lang" data-language="go">Go</label>
 | |
| 	
 | |
| 	
 | |
| 	<input type="radio" id="subscribe_queue_java" name="subscribe_queue" class="tab">
 | |
| 	
 | |
| 	<label for="subscribe_queue_java" class="api-lang" data-language="java">Java</label>
 | |
| 	
 | |
| 	
 | |
| 	<input type="radio" id="subscribe_queue_js" name="subscribe_queue" class="tab">
 | |
| 	
 | |
| 	<label for="subscribe_queue_js" class="api-lang" data-language="js">JavaScript</label>
 | |
| 	
 | |
| 	
 | |
| 	<input type="radio" id="subscribe_queue_py" name="subscribe_queue" class="tab">
 | |
| 	
 | |
| 	<label for="subscribe_queue_py" class="api-lang" data-language="py">Python</label>
 | |
| 	
 | |
| 	
 | |
| 	<input type="radio" id="subscribe_queue_ruby" name="subscribe_queue" class="tab">
 | |
| 	
 | |
| 	<label for="subscribe_queue_ruby" class="api-lang" data-language="ruby">Ruby</label>
 | |
| 	
 | |
| 	
 | |
| 	<input type="radio" id="subscribe_queue_ts" name="subscribe_queue" class="tab">
 | |
| 	
 | |
| 	<label for="subscribe_queue_ts" class="api-lang" data-language="ts">TypeScript</label>
 | |
| 	
 | |
| 
 | |
|   	
 | |
| 	<div class="tab__content">
 | |
| 	<pre id="subscribe_queue_go_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/go-nats-examples/blob/master/api-examples/subscribe_queue/main.go#L11-32"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-go">nc, err := nats.Connect("demo.nats.io")
 | |
| if err != nil {
 | |
| 	log.Fatal(err)
 | |
| }
 | |
| defer nc.Close()
 | |
| 
 | |
| // Use a WaitGroup to wait for 10 messages to arrive
 | |
| wg := sync.WaitGroup{}
 | |
| wg.Add(10)
 | |
| 
 | |
| // Create a queue subscription on "updates" with queue name "workers"
 | |
| if _, err := nc.QueueSubscribe("updates", "worker", func(m *nats.Msg) {
 | |
| 	wg.Done()
 | |
| }); err != nil {
 | |
| 	log.Fatal(err)
 | |
| }
 | |
| 
 | |
| // Wait for messages to come in
 | |
| wg.Wait()
 | |
| 
 | |
| </code></pre>
 | |
| 	</div>
 | |
| 	
 | |
| 	<div class="tab__content">
 | |
| 	<pre id="subscribe_queue_java_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/java-nats-examples/blob/master/src/main/java/io/nats/examples/SubscribeQueue.java#L14-35"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-java">Connection nc = Nats.connect("nats://demo.nats.io:4222");
 | |
| 
 | |
| // Use a latch to wait for 10 messages to arrive
 | |
| CountDownLatch latch = new CountDownLatch(10);
 | |
| 
 | |
| // 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", "workers");
 | |
| 
 | |
| // Wait for a message to come in
 | |
| latch.await(); 
 | |
| 
 | |
| // Close the connection
 | |
| nc.close();
 | |
| </code></pre>
 | |
| 	</div>
 | |
| 	
 | |
| 	<div class="tab__content">
 | |
| 	<pre id="subscribe_queue_js_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/node-nats-examples/blob/master/src/subscriber_samples.js#L213-220"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-javascript">let nc = NATS.connect({
 | |
|     url: "nats://demo.nats.io:4222"});
 | |
| 
 | |
| nc.subscribe('updates', {queue: "workers"}, (msg) => {
 | |
|     t.log('worker got message', msg);
 | |
| });
 | |
| </code></pre>
 | |
| 	</div>
 | |
| 	
 | |
| 	<div class="tab__content">
 | |
| 	<pre id="subscribe_queue_py_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/asyncio-nats-examples/blob/master/subscribe_queue.py#L6-23"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-python">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", queue="workers", cb=cb)
 | |
| await nc.publish("updates", b'All is Well')
 | |
| 
 | |
| msg = await asyncio.wait_for(future, 1)
 | |
| print("Msg", msg)
 | |
| 
 | |
| </code></pre>
 | |
| 	</div>
 | |
| 	
 | |
| 	<div class="tab__content">
 | |
| 	<pre id="subscribe_queue_ruby_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/ruby-nats-examples/blob/master/subscribe_queue.rb#L1-21"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-ruby">require 'nats/client'
 | |
| require 'fiber'
 | |
| 
 | |
| NATS.start(servers:["nats://127.0.0.1:4222"]) do |nc|
 | |
|   Fiber.new do
 | |
|     f = Fiber.current
 | |
| 
 | |
|     nc.subscribe("updates", queue: "worker") do |msg, reply|
 | |
|       f.resume Time.now
 | |
|     end
 | |
| 
 | |
|     nc.publish("updates", "A")
 | |
| 
 | |
|     # Use the response
 | |
|     msg = Fiber.yield
 | |
|     puts "Msg: #{msg}"
 | |
|   end.resume
 | |
| end
 | |
| 
 | |
| </code></pre>
 | |
| 	</div>
 | |
| 	
 | |
| 	<div class="tab__content">
 | |
| 	<pre id="subscribe_queue_ts_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/ts-nats-examples/blob/master/src/subscriber_samples.ts#L193-197"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-javascript">await nc.subscribe('updates', (err, msg) => {
 | |
|     t.log('worker got message', msg.data);
 | |
| }, {queue: "workers"});
 | |
| </code></pre>
 | |
| 	</div>
 | |
| 	
 | |
| </div>
 |