AMPQ
What is the Advanced Message Queuing Protocol used for?
The existing networking protocol standards have a significant gap; all but the most popular guaranteed-delivery message middleware have been addressed. In every automated business process in medium to big businesses, such middleware serves as the foundation for the back and middle office systems and is a crucial utility. JMS provides a portion of the answer, but it is constrained by its dependence on Java and inability to define any wire-level compatibility. Any solution for this area must be open source, accessible from any platform, and multilingual.
Due to the poor interoperability between current proprietary solutions caused by the lack of open protocol standards, new market entrants are forced to reinvent even the most fundamental features before they can start to incorporate their own innovations. The Advanced Messaging Queuing Protocol (AMQProtocol) enables open interoperability for APIs like JMS or can be integrated into already-existing products. The AMQProtocol complements the existing work in the industry by working with the majority of the messaging and Web service specifications already in use, including JMS, SOAP, WS-Security, WS-Transactions, and many more. In addition, AMQProtocol will offer specific multicast routing to and from multicast for subnet deployments or grid-style deployments.
What does AMQ Protocol mean?
As a result, the AMQProtocol:
The AMQProtocol specification can be used to infer some of the semantics of the server, but having them explicitly stated aids in comprehending the protocol.
Model of the AMQProtocol
Since interoperability requires that the server semantics be the same in any server implementation, the AMQProtocol model specifically defines the server semantics. The model outlines a modular group of parts and established procedures for linking them. There are three primary sorts of components that are plugged into the server’s processing chains to produce the needed functionality:
According to arbitrary criteria, often message attributes or content, the “exchange” receives messages from publisher apps and directs them to “message queues”;
The “message queue” holds messages up until consuming client apps (or several applications) can handle them in a secure manner;
The “binding” establishes the connection between a message queue and an exchange and offers the requirements for message routing.
In a simplistic way, this paradigm imitates the store-and-forward queues and topic subscriptions of traditional middleware. Each transfer agent’s routing tables are specified by the bindings. Individual transfer agents receive messages from publishers, who then deliver them to mailboxes. Customers retrieve messages from mailboxes, which generates a strong, adaptable model that is straightforward.
The Wire-level AMQProtocol Format
Because the transport layer and the high-level layer are both pluggable, the protocol can develop and new technologies can be incorporated.
A transparent methodology and input from implementation projects on the specification
The intention is to promote the development of top-notch protocol implementations and that protocol specifications themselves would also develop based on technical merit and practical considerations required for adoption by both the parties working on the specification and the users in the larger community. Given this, one of the crucial components is the process by which errors discovered in implementations as a result of protocol flaws find their way back into the specifications to be fixed.
Anyone may submit a bug report to the specification working group using the RLA (Reviewer Licence Agreement), just as anyone may submit a bug report to any Apache project that has signed the Apache CLA (modelled after Apache governance). This Agreement grants a licence to that IP, allowing the specification team to incorporate it into the specification while maintaining the complete openness and royalty-free nature of the specification.
Similar to an Apache-style process, if a person has demonstrated project comprehension and significant contribution to the specification, an invitation to have the new Party join the specification Working Group can be made based on technical merit and comprehension of the project’s objectives. The Party must execute a contract that ensures they also give continuous and consistent licences to the work upon such acceptance.
The AMQProtocol specification as it stands is currently published at the “version 0.8” level, suggesting that it is not in its final form. 1.0 level of the standard is mature and prepared for use by developers and businesses, the specification is published with the intention of receiving feedback from the community.
the AMQProtocol Version 0.8 Specification can be downloaded.
The entire AMQProtocol version 0.8 specification and supporting materials are available for download/view here:
- Description of the AMQProtocol
- Definitions for AMQProtocol classes (XML)
- Definitions of the AMQProtocol class (PDF)