RabbitMQ is an open-source message-broker software (sometimes called message-oriented middleware) that originally implemented the Advanced Message Queuing Protocol (AMQP) and has since been extended with a plug-in architecture to support Streaming Text Oriented Messaging Protocol (STOMP), MQ Telemetry Transport (MQTT), and other protocols.[1]

Developer(s)Pivotal Software
Stable release
3.11.9 / February 13, 2023; 29 days ago (2023-02-13)
Written inErlang
Operating systemCross-platform
TypeAMQP, message-oriented middleware
LicenseMozilla Public License

Written in Erlang, the RabbitMQ server is built on the Open Telecom Platform framework for clustering and failover. Client libraries to interface with the broker are available for all major programming languages. The source code is released under the Mozilla Public License.


Originally developed by Rabbit Technologies Ltd. which started as a joint venture between LShift and CohesiveFT in 2007,[2] RabbitMQ was acquired in April 2010 by SpringSource, a division of VMware.[3] The project became part of Pivotal Software in May 2013.[4]

The project consists of:

  • The RabbitMQ exchange server
  • Gateways for AMQP, HTTP, STOMP, and MQTT protocols
  • AMQP client libraries for Java, .NET Framework and Erlang. (AMQP clients for other languages are available from other vendors.)
  • A plug-in platform for extensibility, with a predefined collection of supported plug-ins, including:
    • A "Shovel" plug-in that takes care of moving or copying (replicating) messages from one broker to another.
    • A "Federation" plug-in that enables efficient sharing of messages between brokers (at the exchange level).
    • A "Management" plug-in that enables monitoring and control of brokers and clusters of brokers.


This section gives sample programs written in Python (using the pika package) for sending and receiving messages using a queue.


The following code fragment establishes a connection, makes sure the recipient queue exists, then sends a message and finally closes the connection.

#!/usr/bin/env python3
import pika

connection = pika.BlockingConnection(pika.ConnectionParameters(host="localhost"))
channel = connection.channel()
channel.basic_publish(exchange="", routing_key="hello", body="Hello World!")
print(" [x] Sent 'Hello World!'")


Similarly, the following program receives messages from the queue and prints them on the screen: (Note: This example does not acknowledge receipt of the message.)

#!/usr/bin/env python3
import pika

def callback(ch, method, properties, body):
    print(" [x] Received %r" % body)

connection = pika.BlockingConnection(pika.ConnectionParameters(host="localhost"))
channel = connection.channel()
print(" [*] Waiting for messages. To exit press Ctrl+C")
channel.basic_consume(queue="hello", on_message_callback=callback)

See alsoEdit


  1. ^ Which protocols does RabbitMQ support?
  2. ^ "Launch of RabbitMQ Open Source Enterprise Messaging" (PDF). Press release. February 8, 2007. Retrieved October 23, 2013.
  3. ^ "Rabbit Technologies announce acquisition by SpringSource". Press release. April 13, 2010. Archived from the original on April 18, 2010. Retrieved October 3, 2013.
  4. ^ "Proudly part of Pivotal". Press release. May 14, 2010. Archived from the original on June 2, 2013. Retrieved October 3, 2013.

Further readingEdit

External linksEdit