RabbitMQ

RabbitMQ

File:RabbitMQLogo.png
Developer(s)	Pivotal Software
Stable release	3.6.5 / August 5, 2016 (2016-08-05)
Repository	github.com/rabbitmq/rabbitmq-server
Written in	Erlang
Operating system	Cross-platform
Type	AMQP, message-oriented middleware
License	Mozilla Public License
Website	www.rabbitmq.com

RabbitMQ is open source message broker software (sometimes called message-oriented middleware) that implements the Advanced Message Queuing Protocol (AMQP). The RabbitMQ server is written in the Erlang programming language and 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.

History

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

The source code is released under the Mozilla Public License. The project consists of:

• The RabbitMQ exchange server itself
• Gateways for HTTP, Streaming Text Oriented Messaging Protocol (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 custom additions, with a pre-defined 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 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.

#!/usr/bin/env python
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()

Receiving

Similarly, the following program receives messages from the queue and prints them on the screen:

#!/usr/bin/env python
import pika
connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
channel = connection.channel()
channel.queue_declare(queue='hello')
print(' [*] Waiting for messages. To exit press CTRL+C')
def callback(ch, method, properties, body):
    print(" [x] Received %r" % body)
channel.basic_consume(callback, queue='hello', no_ack=True)
channel.start_consuming()

See also

• Advanced Message Queuing Protocol (AMQP)
• ZeroMQ
• Enduro/X

References

"What is Rabbit MQ, Why to use and How to Install"

Further reading

• Joern Barthel (2009-09-13). "Getting started with AMQP and RabbitMQ". InfoQ.
• Peter Cooper (2009-04-09). "RabbitMQ - A Fast, Reliable Queuing Option for Rubyists". RubyInside.
• RabbitMQ: An Open Source Messaging Broker That Just Works. Google Tech Talks. 2008-09-25.

External links

• Official website
• Evaluation for Second Life by Linden Labs
• Using RabbitMQ, Spring AMQP, and Spring Integration
• http://www.rabbitmq.com/getstarted.html
• http://www.rabbitmq.com/tutorials/tutorial-one-python.html
• Cloud hosted RabbitMQ clusters