DesignXMPP analysis » History » Version 7
Adrian Georgescu, 03/02/2012 10:07 AM
| 1 | 7 | Adrian Georgescu | = XMPP Library Candidates Analysis = |
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| 3 | 6 | [[TOC(DesignXMPP, DesignXMPP_analysis, DesignXMPP_arch, DesignXMPP_im, depth=2)]] |
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| 4 | 4 | ||
| 5 | 1 | In this phase the existing XMPP libraries will be analyzed and one will be chosen to be used throughout the project. |
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| 7 | 7 | Adrian Georgescu | == Library Requirements == |
| 8 | 1 | ||
| 9 | * Written in Python (C/C++ could also be used, but a wrapper would need to be written) |
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| 10 | 7 | Adrian Georgescu | * Support for XMPP server and/or component |
| 11 | 1 | * Ability to use it with the current model used by SylkServer |
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| 12 | * Green threads |
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| 13 | * Callback based IO |
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| 14 | |||
| 15 | == XMPP server vs XMPP component |
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| 17 | 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: |
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| 18 | |||
| 19 | {{{ |
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| 20 | component.domain.tld |
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| 21 | }}} |
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| 22 | |||
| 23 | This mechanism is defined in [http://xmpp.org/extensions/xep-0114.html XEP-0114]. |
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| 25 | 3 | 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. |
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| 27 | 7 | Adrian Georgescu | == Library Evaluation == |
| 28 | 1 | ||
| 29 | The following aspects were considered when evaluating a given library: |
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| 30 | |||
| 31 | * Met requirements stated above |
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| 32 | 3 | * Is it actively maintained? |
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| 33 | 1 | * Example use cases |
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| 34 | * Deployments in real-world scenarios |
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| 35 | 3 | * Perceived complexity to integrate it with SylkServer architecture |
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| 36 | 1 | ||
| 37 | 2 | === SleekXMPP=== |
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| 38 | |||
| 39 | * Plugin architecture, each XEP as a plugin |
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| 40 | * Client and server component support |
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| 41 | * Threaded model (thread based scheduler) |
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| 42 | * Active development |
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| 43 | 1 | ||
| 44 | === Wokkel === |
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| 45 | 2 | ||
| 46 | 1 | * Plugin architecture, 'subprotocols' implementing different XEPs |
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| 47 | * Client and server component support |
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| 48 | 3 | * XMPP server-to-server support (s2s) |
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| 49 | 1 | * Designed to be used with Twisted (reactor model) |
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| 50 | 2 | * Active development |
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| 51 | |||
| 52 | == Selected XMPP library == |
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| 53 | |||
| 54 | 7 | Adrian Georgescu | After analyzing candidate libraries '''Wokkel''' was the chosen one for the following reasons: |
| 55 | 3 | ||
| 56 | * Implemented on top of Twisted, which makes integration with SylkServer straightforward |
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| 57 | * Support for both component and XMPP server models, allowing for flexibility in implementation |