DesignXMPP analysis » History » Revision 3
Revision 2 (Anonymous, 02/14/2012 11:26 AM) → Revision 3/17 (Anonymous, 02/29/2012 11:27 AM)
= XMPP library candidates analysis =
In this phase the existing XMPP libraries will be analyzed and one will be chosen to be used throughout the project.
== Library requirements ==
* Written in Python (C/C++ could also be used, but a wrapper would need to be written)
* Support for XMPP server (or component, details later)
* Ability to use it with the current model used by SylkServer
* Green threads
* Callback based IO
== XMPP server vs XMPP component
The XMPP protocol was designed to be extended by entities called "components" which sit on the side of the server. A component is addressed with a DNS subdomain in the following form:
{{{
component.domain.tld
}}}
This mechanism is defined in [http://xmpp.org/extensions/xep-0114.html XEP-0114].
With this architecture in place deployment of additional features to an existing XMPP server doesn't require to modify it. it or write a new XMPP server implementation. The SIP-XMPP gateway can potentially should preferably be implemented as either a XMPP component or an standalone to avoid the need for implementing a full XMPP server. server, which would be very disruptive for existing XMPP installations that would like to benefit from the SIP gateway functionality.
== Library evaluation ==
The following aspects were considered when evaluating a given library:
* Met requirements stated above
* Is Date of last release (is it actively maintained? maintained?)
* Example use cases
* Deployments in real-world scenarios
* Perceived complexity ability to integrate it with SylkServer architecture
=== SleekXMPP===
'''WIP'''
* Plugin architecture, each XEP as a plugin
* Client and server component support
* Threaded model (thread based scheduler)
* Active development
=== Wokkel ===
'''WIP'''
* Plugin architecture, 'subprotocols' implementing different XEPs
* Client and server component support
* Partial support for XMPP server-to-server support (s2s) server
* Designed to be used with Twisted (reactor model)
* Active development
== Selected XMPP library ==
After analyzing candidate libraries '''Wokkel''' was the chosen one. Reasons:
* Implemented on top of Twisted, which makes integration with SylkServer straightforward
* Support for both component and XMPP server models, allowing for flexibility in implementation
TODO