= 2008-10-30 =

 * 根據 Orbited 的相依說明，我們會需要這幾個套件
   * python2.5 - An interactive high-level object-oriented language (version 2.5) 
     * [註一] ''用 Python 2.4 在執行 orbited 時會遇到一些 Runtime Error~''
     * [註二] 由於安裝之後，Etch 預設還是用 Python2.4，很難改變預設 Runtime，因此網路上建議直接用 tarball 安裝。另一個解法就是升級到 lenny。
{{{
~$ echo "deb http://free.nchc.org.tw/debian/ lenny main contrib non-free" > /tmp/lenny.list
~$ sudo mv /tmp/lenny.list /etc/apt/sources.list.d/
~$ sudo rm /etc/apt/sources.list
~$ sudo apt-get update
~$ sudo apt-get -t lenny -y upgrade
~$ sudo apt-get -t lenny -y dist-upgrade
}}}
   * python-setuptools - Python Distutils Enhancements
   * python-twisted - Event-based framework for internet applications (transitional package)
   * python-simplejson - Simple, fast, extensible JSON encoder/decoder for Python
 * 安裝 Orbited 相關套件
{{{
~$ sudo apt-get install python-setuptools python-twisted python-simplejson
~$ wget http://pypi.python.org/packages/source/o/orbited/orbited-0.7.0.tar.gz
~$ tar zxvf orbited-0.7.0.tar.gz
~$ sudo easy_install orbited-0.7.0
~$ sudo cp orbited-0.7.0/orbited.cfg /etc/
}}}
 * 測試 Orbited
{{{
~$ python
Python 2.5.2 (r252:60911, Sep 29 2008, 21:15:13)
[GCC 4.3.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import orbited
>>> [Ctrl+D]
}}}
 * 如果沒有錯誤訊息就可以繼續跑測試了。參考[http://cometdaily.com/2008/10/10/scalable-real-time-web-architecture-part-2-a-live-graph-with-orbited-morbidq-and-jsio/ Scalable Real-Time Web Architecture, Part 2: A Live Graph with Orbited, MorbidQ, and js.io]，我們在 Lenny 的環境下，成功重現這個範例。
{{{
~$ sudo easy_install stompservice 
~$ wget http://cometdaily.com/wp-content/uploads/2008/10/graph_demo.tgz
~$ tar zxvf graph_demo.tgz
~$ cd graph_demo/
~/graph_demo$ for i in `find . -type f`; do sed "s#localhost#${NEW_IP_ADDRESS}#g" $i > $i.bak; mv $i.bak $i; done
~/graph_demo$ orbited --config graph.cfg
10/30/08 16:08:02:525 INFO   orbited.start      proxy protocol active
10/30/08 16:08:02:525 INFO   orbited.start      Listening http@9000
10/30/08 16:08:02:527 INFO   orbited.start      Listening stomp@61613
}}}
 * 連線到 http://${NEW_IP_ADDRESS}:9000/graph ，並在另一個 console 下執行 data_producer.py，就會看到圖表一直在變化。
{{{
~/graph_demo$ python data_producer.py
Connected; producing data
}}}
 * [[Image(orbited.jpg)]]