fig-example-xmpp-stream.tex

   1 \tikzstyle{pkt}=[
   2   fill,
   3   below=-.5\baselineskip,
   4   font=\scriptsize,
   5   draw,
   6   dash pattern=on 2pt off 2pt,
   7 ]
   8 \tikzstyle{clipkt}=[pkt,
   9   below left=-.5\baselineskip and 0cm,
  10   pos=0.05,
  11 ]
  12 \tikzstyle{devpkt}=[pkt,
  13   below right=-.5\baselineskip and 0cm,
  14   pos=0.05,
  15 ]
  16 \begin{tikzpicture}[
  17   every node/.style={fill=white, font=\small},
  18   every picture/.style=ultra thin,
  19   >=latex,
  20   semithick
  21 ]
  22
  23 \def\bot{-16}
  24 \def\top{0}
  25 \def\dev{-5}
  26 \def\cli{5}
  27 \newlength{\ypos}
  28 \newlength{\yypos}
  29 \setlength{\ypos}{0cm}
  30 \setlength{\yypos}{.5cm}
  31 \def\advanceby#1{%
  32   \addtolength{\ypos}{#1}%
  33   \addtolength{\yypos}{#1}%
  34   \global\ypos=\ypos% // see https://tex.stackexchange.com/questions/119730
  35   \global\yypos=\yypos%
  36 }
  37
  38 %% Header
  39 \draw (\cli,\top) node[draw]{Client} -- (\cli,\bot);
  40 \draw (\dev,\top) node[draw]{Device} -- (\dev,\bot);
  41
  42 \advanceby{.75cm}
  43 \draw[->] (\cli,-\ypos) -- (\dev,-\yypos) node[clipkt]{\verb+<stream>+};
  44 \advanceby{1cm}
  45 \draw[->] (\dev,-\ypos) -- (\cli,-\yypos) node[devpkt]{\verb+<stream>+};
  46
  47 \advanceby{1cm}
  48 \draw[->] (\cli,-\ypos) -- (\dev,-\yypos) node[clipkt,text width=5cm]{
  49 \begin{verbatim}
  50 <iq type='get' id='1'
  51     to='dev@device.local/res'
  52     from='client@client.local'>
  53   <req xmlns='urn:xmpp:sn' seqnr='1'
  54       momentary='true'>
  55     <node nodeId='Device04'/>
  56     <field name='Energy'/>
  57     <field name='Power'/>
  58   </req>
  59 </iq>
  60 \end{verbatim}
  61 \advanceby{9\baselineskip}
  62 };
  63
  64 \advanceby{1cm}
  65 \draw[->] (\dev,-\ypos) -- (\cli,-\yypos) node[devpkt,text width=6cm]{
  66 \begin{verbatim}
  67 <iq type='result' id='1'
  68     from='dev@device.local'
  69     to='client@client.local/res'>
  70   <accepted xmlns='urn:xmpp:sn' seqnr='1'/>
  71 </iq>
  72 \end{verbatim}
  73 \advanceby{4\baselineskip}
  74 };
  75
  76 \advanceby{1cm}
  77 \draw[->] (\dev,-\ypos) -- (\cli,-\yypos) node[devpkt,text width=7cm]{
  78 \begin{verbatim}
  79 <message from='dev@device.local'
  80     to='client@client.local/res'>
  81   <fields xmlns='urn:xmpp:sn' seqnr='1' done='true'>
  82     <node nodeId='Device04'>
  83       <timestamp value='2013-03-07T22:03:15'>
  84         <numeric name='Energy' momentary='true'
  85           value='12345.67' unit='MWh'/>
  86         <numeric name='Power' momentary='true'
  87           value='239.4' unit='W'/>
  88       </timestamp>
  89     </node>
  90   </fields>
  91 </message>
  92 \end{verbatim}
  93 \advanceby{12\baselineskip}
  94 };
  95
  96 \advanceby{1cm}
  97 \draw[->] (\cli,-\ypos) -- (\dev,-\yypos) node[clipkt]{\verb+</stream>+};
  98 \advanceby{1cm}
  99 \draw[->] (\dev,-\ypos) -- (\cli,-\yypos) node[devpkt]{\verb+</stream>+};
 100 \end{tikzpicture}
 101 % vim: set ft=tex et ts=2 sw=2 :