{{Short description|Open source message broker}} {{third-party|date=May 2019}} {{Infobox software | name = RabbitMQ | logo = RabbitMQ logo.svg | screenshot = | caption = | developer = Broadcom | latest release version = {{wikidata|property|preferred|references|edit|Q2081413|P348}} | latest release date = {{wikidata|qualifier|preferred|single|Q2081413|P348|P577}} | repo = {{URL|https://github.com/rabbitmq}} | programming language = Erlang | operating system = Cross-platform | genre = AMQP, message-oriented middleware | license = Mozilla Public License | website = {{URL|https://www.rabbitmq.com}} }}
'''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.<ref>[https://www.rabbitmq.com/protocols.html Which protocols does RabbitMQ support?]</ref>
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.
Since November 2020, there are commercial offerings available of RabbitMQ, for support and enterprise features: "VMware RabbitMQ OVA", "VMware RabbitMQ" and "VMware RabbitMQ for Kubernetes" (different feature levels) <ref>{{cite web |title=VMware RabbitMQ |url=https://www.vmware.com/products/rabbitmq.html |access-date=5 May 2023}}</ref> Open-Source RabbitMQ is also packaged by Bitnami<ref>{{Cite web |title=RabbitMQ |url=https://bitnami.com/stack/rabbitmq |access-date=2023-05-08 |website=bitnami.com |language=en-US}}</ref> and commercially for VMware's Tanzu Application Service.
==History== Originally developed by Rabbit Technologies Ltd. which started as a joint venture between LShift and CohesiveFT in 2007,<ref>{{Cite news |work= Press release |date= February 8, 2007 |title= Launch of RabbitMQ Open Source Enterprise Messaging |url= http://www.rabbitmq.com/resources/RabbitMQ_PressRelease_080207.pdf |access-date= October 23, 2013 }}</ref> RabbitMQ was acquired in April 2010 by SpringSource, a division of VMware.<ref>{{Cite news |work= Press release |date= April 13, 2010 |title= Rabbit Technologies announce acquisition by SpringSource |url=http://www.rabbitmq.com/news.html |url-status=dead |archive-url= https://web.archive.org/web/20100418132113/http://www.rabbitmq.com/news.html |archive-date= April 18, 2010 |access-date= October 3, 2013 }}</ref> The project became part of Pivotal Software in May 2013,<ref>{{Cite news |work= Press release |date= May 14, 2010 |title= Proudly part of Pivotal |url=http://www.rabbitmq.com/news.html |url-status=dead |archive-url= https://web.archive.org/web/20130602054940/http://www.rabbitmq.com/news.html |archive-date= June 2, 2013 |access-date= October 3, 2013 }}</ref> which then got acquired back by VMware in December 2019.<ref>{{Cite web |title=VMware Completes Acquisition of Pivotal |url=https://news.vmware.com/releases/vmware-completes-acquisition-of-pivotal |access-date=2023-04-06 |website=VMware News and Stories |date=30 December 2019 |language=en}}</ref>
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.
==Examples== This section gives sample programs written in Python (using the ''pika'' package) for sending and receiving messages using a queue.
===Sending=== The following code fragment establishes a connection, makes sure the recipient queue exists, then sends a message and finally closes the connection.
<syntaxhighlight lang="python"> #!/usr/bin/env python3 import pika
connection = pika.BlockingConnection(pika.ConnectionParameters(host="localhost")) channel = connection.channel() channel.queue_declare(queue="hello") channel.basic_publish(exchange="", routing_key="hello", body="Hello World!") print(" [x] Sent 'Hello World!'") connection.close() </syntaxhighlight>
===Receiving=== Similarly, the following program receives messages from the queue and prints them on the screen: (Note: This example does not [https://pika.readthedocs.io/en/stable/examples/blocking_consume.html acknowledge] receipt of the message.)
<syntaxhighlight lang="python"> #!/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() channel.queue_declare(queue="hello") print(" [*] Waiting for messages. To exit press Ctrl+C") channel.basic_consume(queue="hello", on_message_callback=callback) channel.start_consuming() </syntaxhighlight>
==See also== * Apache Kafka {{Portal|Free and open-source software}}
==References== {{Reflist}}
==Further reading== * {{cite web |date=2009-09-13 |author=Joern Barthel |title=Getting started with AMQP and RabbitMQ |publisher=InfoQ |url = http://www.infoq.com/articles/AMQP-RabbitMQ }} * {{cite web |date=2009-04-09 |author=Peter Cooper |title=RabbitMQ - A Fast, Reliable Queuing Option for Rubyists |publisher=RubyInside |url=http://www.rubyinside.com/rabbitmq-a-fast-reliable-queuing-option-for-rubyists-1681.html }} * {{cite conference |date=2008-09-25 |title=RabbitMQ: An Open Source Messaging Broker That Just Works |publisher=Google Tech Talks |url=https://google-ukdev.blogspot.com/2008/09/rabbitmq-tech-talk-at-google-london.html }}
==External links== * {{Official website}}
{{Message-oriented middleware}}
Category:Erlang (programming language) Category:Free software programmed in Erlang Category:Message-oriented middleware Category:Software using the Mozilla Public License Category:Pivotal Software