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What is AMQP?

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AMQP Advanced Message Queuing Protocol is an open standard designed to support reliable, high-performance messaging over the Internet. AMQP can be used for any distributed or business application, and supports common messaging paradigms like point-to-point, fanout, publish-subscribe, and request-response.

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Apache Qpid implements AMQP, including transaction management, queuing, clustering, federation, security, management and multi-platform support.

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Apache Qpid implements the latest AMQP specification, providing transaction management, queuing, distribution, security, management, clustering, federation and heterogeneous multi-platform support and a lot more.

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Apache Qpid is highly optimized, and aims to be 100% AMQP Compliant.

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Download the AMQP Specifications

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AMQP version 0-10

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AMQP version 0-9-1

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AMQP version 0-9

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AMQP version 0-8

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Qpid provides the most complete and compatible implementation of AMQP. And is the most aggressive in implementing the latest version of the specification. Qpid can be downloaded here

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There are two brokers:

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C++ with support for AMQP 0-10
-Java with support for AMQP 0-8, 0-9, and 0-10.

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There are client libraries for C++, Java (JMS), .Net (written in C#), python and ruby.

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All clients support 0-10 and interoperate with both brokers as of 0.6.

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The JMS client supports 0-8, 0-9 and 0-10 and interoperates with both brokers.

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The python and ruby clients will also support all versions, but the API is dynamically driven by the specification used and so differs between versions. To work with the C++ broker you must use 0-10. To work with the Java broker you can use any version as of 0.6, or prior to 0.6 you can use 0-8 or 0-9.

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There are two separate C# clients, one for 0-8 that interoperates only with the Java broker, and one for 0-10.

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There is also a WCF channel, which wraps the 0-10 native C++ client library.

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QMF Management is supported in Ruby, Python, C++, and can be translated to Java JMX & WS-DM via the QMan management tool.

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AMQP Compatibility of Qpid releases:

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Qpid implements the AMQP Specification, and as the specification has progressed Qpid is keeping up with the updates. This means that different Qpid versions support different versions of AMQP. Here is a simple guide on what use.

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Here is a matrix that describes the different versions supported by each release
-Y = supported
-N = unsupported
- -IP = in progress
-P = planned

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Component	Spec
		M2.1	M3	M4	0.5	0.6
Java client	0-10		Y	Y	Y	Y
	0-9	Y	Y	Y	Y	Y
	0-8	Y	Y	Y	Y	Y
Java broker	0-10					Y
	0-9	Y	Y	Y	Y	Y
	0-8	Y	Y	Y	Y	Y
C++ client/broker	0-10		Y	Y	Y	Y
	0-9	Y
Python client	0-10		Y	Y	Y	Y
	0-9	Y	Y	Y	Y	Y
	0-8	Y	Y	Y	Y	Y
Ruby client	0-10			Y	Y	Y
	0-8	Y	Y	Y	Y	Y
C# client	0-10			Y	Y	Y
	0-8	Y	Y	Y	Y	Y
WCF channel	0-10					Y

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Interop table by AMQP specification version

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Above table represented in another format.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

	release	0-8	0-9	0-10
Java client	M3 M4 0.5 0.6	Y	Y	Y
Java client	M2.1	Y	Y	N
Java broker	0.6	Y	Y	Y
Java broker	M3 M4 0.5	Y	Y	N
Java broker	M2.1	Y	Y	N
C++ client/broker	M3 M4 0.5 0.6	N	N	Y
C++ client/broker	M2.1	N	Y	N
Python client	M3 M4 0.5 0.6	Y	Y	Y
Python client	M2.1	Y	Y	N
Ruby client	M4, 0.5, 0.6	Y	Y	Y
Ruby client	M3	Y	Y	N
C# client 0-10	M4 0.5 0.6	N	N	Y
C# client 0-8	M3 M4 0.5 0.6	Y	N	N
WCF channel	0.6	N	N	Y

Acknowledgements

What is AMQP?

Download the AMQP Specifications

AMQP version 0-10

AMQP version 0-9-1

AMQP version 0-9

AMQP version 0-8

AMQP Compatibility of Qpid releases:

Interop table by AMQP specification version

Qpid Wiki