====== Nio pattern ======
  * http://liminescence.blogspot.de/2011/08/reactor-design-pattern-using-java-nio.html
  * http://rox-xmlrpc.sourceforge.net/niotut/#The%20client
  * http://www.cs.bgu.ac.il/~spl051/Personal_material/Practical_sessions/Ps_12/ps12.html
  * http://www.cordinc.com/blog/2010/08/java-nio-server-example.html
  * http://jfarcand.wordpress.com/2006/07/19/httpweblogs-java-netblog20060719tricks-and-tips-nio-part-iv-meet-selectors/