XREST Protocol
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The eXtensible REST Services Protocol allows clients to consume services and extend hosts through plug-ins. Hosts are RESTful applications with an extension registry to register plug-ins. Plug-ins receive callbacks from hosts and can decorate host responses. The protocol uses asynchronous callbacks for concurrent execution and synchronous callbacks to allow response decoration in a failure-flexible manner.
XREST Protocol
- 1. eXtensible REST Services Protocol Plug-in Architectural Style for the Cloud http://xrest.googlecode.com
- 2. Protocol Objectives • Running the Web as Platform • Unify the Experience and Implementation of Programmable Web Services Pub/Sub Browser Blog Plug-in Social Twitter Desktop Network Plug-in ... Mail Your Tool
- 3. Protocol Model Clients: • Consume services on the host • Add plug-in references (extensions) to the host extension registry Browser Plug-in A Desktop Host Plug-in B ... Plug-in C
- 4. Protocol Model Hosts: • Restful application (HTTP: RFC2616) • Extension registry (AtomPub: RFC5023) • Callback to plug-ins (Web Hooks: http://webhooks.org) Browser Plug-in A Desktop Host Plug-in B ... Plug-in C
- 5. Protocol Model Plug-ins: • Receive callback parameters from the host • Can decorate the host response to the client. Browser Plug-in A Desktop Host Plug-in B ... Plug-in C
- 6. Protocol Runtime POST Plug-in A extension Browser Plug-in A Desktop Host Plug-in B ... Plug-in C
- 7. Protocol Runtime GET Plug-in A acknowledgement Browser Plug-in A Desktop Host Plug-in B ... Plug-in C
- 8. Protocol Runtime OK Browser Plug-in A Desktop Host Plug-in B ... Plug-in C
- 9. Protocol Runtime OK Browser Plug-in A Desktop Host Plug-in B ... Plug-in C
- 10. Protocol Runtime Browser Plug-in A Desktop Host Plug-in B ... Plug-in C The service has been extended
- 11. Protocol Runtime REST call Browser Plug-in A Desktop Host Plug-in B ... Plug-in C
- 12. Protocol Runtime Compute response Browser Plug-in A Desktop Host Plug-in B ... Plug-in C
- 13. Protocol Runtime POST response body + extension header Browser Plug-in A Desktop Host Plug-in B ... Plug-in C
- 14. Protocol Runtime Decorated response body Browser Plug-in A Desktop Host Plug-in B ... Plug-in C
- 15. Protocol Runtime Decorated response body Browser Plug-in A Desktop Host Plug-in B ... Plug-in C
- 16. Scheduling Asynchronous Callbacks: • May be executed concurrently • Cannot decorate the host response Synchronous Callbacks: • Sequential execution • Can decorate the host response • Flexible to failures
- 17. Resources Specification: http://tiny.cc/xrest Questions and feedbacks: xrest@googlegroups.com More infos: http://xrest.googlecode.com