SylkServer

h1. Software Candidates Analysis

In this phase the existing XMPP libraries will be analyzed and one will be chosen to be used throughout the project.

h2. 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

h2. Software Libraries 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/


h2. 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

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

h2. Selected SIP Library

SIP SIMPLE SDK http://sipsimpleclient.com used by SylkServer