DesignXMPP analysis » History » Revision 11
Revision 10 (Adrian Georgescu, 03/07/2012 09:16 AM) → Revision 11/17 (Adrian Georgescu, 03/07/2012 09:18 AM)
= Software Candidates Analysis =
[[TOC(DesignXMPP, DesignXMPP_analysis, DesignXMPP_arch, DesignXMPP_im, DesignXMPP_presence, DesignXMPP_jingle, DesignXMPP_ft, depth=2)]]
In this phase the existing XMPP libraries will be analyzed and one will be chosen to be used throughout the project.
== Requirements ==
* Written in Python (C/C++ could also be used, but a wrapper would need to be written)
* Support for XMPP server and/or component
* 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. The SIP-XMPP gateway can potentially be implemented as either a XMPP component or an standalone XMPP server.
== Library Evaluation ==
The following aspects were considered when evaluating a given library:
* Met requirements stated above
* Is it actively maintained?
* Example use cases
* Deployments in real-world scenarios
* Perceived complexity to integrate it with SylkServer architecture
List on xmpp.org http://xmpp.org/xmpp-software/libraries/
=== SleekXMPP===
http://github.com/fritzy/SleekXMPP
* Plugin architecture, each XEP as a plugin
* Client and server component support
* Threaded model (thread based scheduler)
* Active development
=== Wokkel ===
http://wokkel.ik.nu/
* Plugin architecture, 'subprotocols' implementing different XEPs
* Client and server component support
* XMPP server-to-server support (s2s)
* Designed to be used with Twisted (reactor model)
* Active development
== Selected XMPP library ==
After analyzing candidate libraries '''Wokkel''' was the chosen one for the following 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
== Selected SIP Library ==
SIP SIMPLE SDK http://sipsimpleclient.com