first sandbox draft

main_test.py

@@ -0,0 +1,63 @@
+import os
+import asyncio
+
+import nats
+from nats.errors import TimeoutError as NATSTimeoutError
+
+NATS_SERVERS = os.getenv('NATS_URL', 'nats://localhost:4222').split(',')
+NATS_TOKEN = os.getenv('NATS_TOKEN', '')
+
+async def nats_subscribe(nc, subject):
+    sub = await nc.subscribe(subject)
+    while True:
+        try:
+            msg = await sub.next_msg(timeout=0.1)
+            print(f"Received a message on '{msg.subject}': {msg.data}")
+        except NATSTimeoutError:
+            continue
+        except KeyboardInterrupt:
+            await sub.unsubscribe()
+            return True
+
+async def nats_publish(nc, subject, data):
+    count = 0
+    while True:
+        try:
+            print(f"Publishing a message on '{subject}': {data}_{count}")
+            await nc.publish(subject, (f"{data}_{count}").encode())
+            count += 1
+            await asyncio.sleep(5)
+        except KeyboardInterrupt:
+            return True
+
+async def main():
+    print(f'Startting ...')
+    print(f'NATS_SERVER: {NATS_SERVERS}')
+    print(f'NATS_TOKEN: {NATS_TOKEN}')
+
+
+    nc = await nats.connect(servers=NATS_SERVERS,
+                            token=NATS_TOKEN)
+
+    asyncio.create_task(nats_subscribe(nc, "greet.*"))
+    asyncio.create_task(nats_publish(nc, "greet.bob", "hello_bob"))
+    await asyncio.sleep(0.5)
+    asyncio.create_task(nats_publish(nc, "greet.alice", "hello_alice"))
+
+
+    while True:
+        await asyncio.sleep(1)
+
+    await nc.drain()
+
+
+
+
+# Press the green button in the gutter to run the script.
+if __name__ == '__main__':
+    try:
+        asyncio.run(main())
+    except KeyboardInterrupt:
+        pass
+
+# See PyCharm help at https://www.jetbrains.com/help/pycharm/