use exchange instead of queue to allow multiple subscribers

msg_broker_rabbit_mq_example/exampleReceiver.py

@@ -1,28 +1,26 @@
-import pika, sys, os
+import pika
 
-# see https://www.rabbitmq.com/tutorials/tutorial-one-python.html
+# see https://www.rabbitmq.com/tutorials/tutorial-three-python.html
 
-def main():
-    connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
-    channel = connection.channel()
+connection = pika.BlockingConnection(
+    pika.ConnectionParameters(host='localhost'))
+channel = connection.channel()
 
-    channel.queue_declare(queue='hello')
+channel.exchange_declare(exchange='logs', exchange_type='fanout')
 
-    def callback(ch, method, properties, body):
-        print(" [x] Received %r" % body)
+result = channel.queue_declare(queue='', exclusive=True)
+queue_name = result.method.queue
 
-    channel.basic_consume(queue='hello', on_message_callback=callback, auto_ack=True)
+channel.queue_bind(exchange='logs', queue=queue_name)
 
-    print(' [*] Waiting for messages. To exit press CTRL+C')
-    channel.start_consuming()
+print(' [*] Waiting for logs. To exit press CTRL+C')
 
 
-if __name__ == '__main__':
-    try:
-        main()
-    except KeyboardInterrupt:
-        print('Interrupted')
-        try:
-            sys.exit(0)
-        except SystemExit:
-            os._exit(0)
+def callback(ch, method, properties, body):
+    print(" [x] %r" % body)
+
+
+channel.basic_consume(
+    queue=queue_name, on_message_callback=callback, auto_ack=True)
+
+channel.start_consuming()

msg_broker_rabbit_mq_example/exampleSender.py

@@ -1,13 +1,15 @@
 import pika
+import sys
 
-# see https://www.rabbitmq.com/tutorials/tutorial-one-python.html
+# see https://www.rabbitmq.com/tutorials/tutorial-three-python.html
 
 connection = pika.BlockingConnection(
     pika.ConnectionParameters(host='localhost'))
 channel = connection.channel()
 
-channel.queue_declare(queue='hello')
+channel.exchange_declare(exchange='logs', exchange_type='fanout')
 
-channel.basic_publish(exchange='', routing_key='hello', body=b'Hello World!')
-print(" [x] Sent 'Hello World!'")
+message = ' '.join(sys.argv[1:]) or b"info: Hello World!"
+channel.basic_publish(exchange='logs', routing_key='', body=message)
+print(" [x] Sent %r" % message)
 connection.close()