Kamaelia 0.2.0 has been released! What is it? =========== Kamaelia is a collection of Axon components designed for network protocol experimentation in a single threaded, select based environment. Axon components are python generators are augmented by inbox and outbox queues (lists) for communication in a communicating sequential processes (CSP) like fashion.
The architecture is specifically designed to try and simplify the process of designing and experimenting with new network protocols in real environments. More background on the motivations behind Kamaelia can be found here: http://kamaelia.sourceforge.net/Challenges/ The focus of this release adds in support for introspection, pygame based interfaces, 4 new examples using these, visualisation tools, as well as syntactic sugar to make building Kamaelia systems simpler. (Specifically Graphline and pipeline systems. This build upon the existing base allowing TCP and Multicast based client/server systems. Other additions and changes include updated examples, variety of bugfixes in existing components (some pre-emptively discovered by introspection), and a variety of utility components. It is now also possible to write components using threading as the concurrency model rather than generators - allowing integration with thread/blocking only based systems. The system is known to work under Linux, Mac OS X, Windows and a subset has been tested on Series 60 mobiles. General feedback is welcome either directly, mailing lists or via the project weblog which is here: * http://kamaelia.sourceforge.net/cgi-bin/blog/blog.cgi What's new in version 0.2.0 ? ============================= Lots! Full release notes can be found here: * http://kamaelia.sourceforge.net/Kamaelia-0.2.0-ReleaseNotes.html Editted highlights... Debian Packages! Many thanks are due to Gintautas Miliauskas, Programmers of Vilnius, for assistance in building Debian packages. (The current packages are based on his, and any errors are likely to be mine, not his) These have been tested successfully on Ubuntu 5.04. 4 new examples have been added showing of various new subsystem: * Example 5 : This creates a simple streaming system, and looks inside to see what components are running/active, and passes the resulting information an Axon Visualiser. * Example 6 : This is a simple/generic topology visualisation server. Accepts the following commands over the network ADD NODE id label auto - ADD LINK id id DEL NODE id DEL ALL As this stands this is pretty useful, but that's pretty much everything it does like this. * Example 7 : This shows how the visualisation subsystem can be extended to work in different ways. What this does by default when run is randomly create new nodes and new linkages quite quickly, allowing you to see how the system works. * Example 8 : Sample slideshow/presentation tool. Unlike traditional slideshow/presentation tools, you can modify this to run arbitrary components. An example of how this can work is provided - allowing stepping through some graph visualisations along with the presentation. A Tools directoy has been added with the following tools: * Axon Shell. (Requires IPython) Implements a simple command line shell which allows experimentation with Axon systems - the shell runs a scheduler as a background thread. For a tutorial of use, see: * http://kamaelia.sourceforge.net/AxonShell.html * Axon Visualiser. Implements a simple tool for looking inside (quite literally) running Axon/Kamaelia systems. This allows a very different style of debugging and can be extremely useful. Tutorial on its way! Graphlines and Pipelines These are probably the most useful additions to Kamaelia since 0.1.2. They are essentially syntactic sugar for building and working with systems of components, but make building interesting systems rapidly out of pre-existing components fun and easy. The pipelines follow the same sort of model as the Unix pipeline. Graphlines are something new, and like pipelines and all linkages may take any data along them. Please take a look at the release notes for a graphline example. A couple of simple pipelines looks like this: pipeline( ReadFileAdaptor(file_to_stream, readmode="bitrate", bitrate=400000, chunkrate=50), blockise(), # Ensure chunks small enough for multicasting! Multicast_transceiver("0.0.0.0", 0, "224.168.2.9", 1600), ).activate() pipeline( Multicast_transceiver("0.0.0.0", 1600, "224.168.2.9", 0), detuple(1), VorbisDecode(), AOAudioPlaybackAdaptor(), ).run() A selection of other subsystems have been added - targeted at visualisation of Kamaelia (and other graph structured) systems using pygame. The layout mechanism is a simple physics engine. Key packages of note added: Kamaelia.UI, Kamaelia.UI.Pygame, Kamaelia.Physics, Kamaelia.Visualisation.Axon, Kamaelia.Visualisation.PhysicsGraph Requirements ============ * Python 2.3 or higher recommended, though please do report any bugs with 2.2. * Axon (1.1.1 recommended) * vorbissimple (if you want to use the vorbis decode component/examples) (Both Axon and vorbissimple are separate parts of the Kamaelia project, and available at the same download location - see below) Platforms ========= Kamaelia has been used successfully under both Linux, Windows and Mac OS X (panther). A subset of Kamaelia has been successfully tested on Series 60 Nokia mobiles when used with the Axon SERIES 60 branch. Where can I get it? =================== Web pages are here: http://kamaelia.sourceforge.net/Docs/ http://kamaelia.sourceforge.net/ (includes info on mailing lists) ViewCVS access is available here: http://cvs.sourceforge.net/viewcvs.py/kamaelia/ Weblog * http://kamaelia.sourceforge.net/cgi-bin/blog/blog.cgi Licensing ========= Kamaelia is released under the Mozilla tri-license scheme (MPL1.1/GPL2.0/LGPL2.1). See http://kamaelia.sourceforge.net/Licensing.html Best Regards, Michael. -- [EMAIL PROTECTED], http://kamaelia.sourceforge.net/ British Broadcasting Corporation, Research and Development Kingswood Warren, Surrey KT20 6NP This message (and any attachments) may contain personal views which are not the views of the BBC unless specifically stated. -- http://mail.python.org/mailman/listinfo/python-list
