Adds async_consume example

examples/experimental/async_consume.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python
+
+from kombu import Connection, Exchange, Queue, Producer, Consumer
+from kombu.async import Hub
+from threading import Event
+
+hub = Hub()
+exchange = Exchange('asynt')
+queue = Queue('asynt', exchange, 'asynt')
+
+def send_message(conn):
+    producer = Producer(conn)
+    producer.publish('hello world', exchange=exchange, routing_key='asynt')
+    print('MESSAGE SENT')
+
+
+def on_message(message):
+    print('RECEIVED: %r' % (message.body, ))
+    message.ack()
+    hub.stop()  # <-- exit after one message
+
+
+if __name__ == '__main__':
+    conn = Connection('amqp://')
+    conn.register_with_event_loop(hub)
+
+    with Consumer(conn, [queue], on_message=on_message):
+        send_message(conn)
+        hub.run_forever()