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annotate mod_statistics/prosodytop.lua @ 1379:403d5cd924eb

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mod_statistics_mem: Module that collects memory usage stats from /proc
author Kim Alvefur <zash@zash.se>
date Thu, 03 Apr 2014 20:57:22 +0200
parents 7dbde05b48a9
children 64f55bcab9f7
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1 local curses = require "curses";
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2 local server = require "net.server_select";
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3 local timer = require "util.timer";
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4
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5 assert(curses.timeout, "Incorrect version of curses library. Try 'sudo luarocks install luaposix'");
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6
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7 local top = require "top";
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8
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9 function main()
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10 local stdscr = curses.stdscr() -- it's a userdatum
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11 --stdscr:clear();
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12 local view = top.new({
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13 stdscr = stdscr;
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14 prosody = { up_since = os.time() };
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15 conn_list = {};
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16 });
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18 timer.add_task(0.01, function ()
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19 local ch = stdscr:getch();
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20 if ch then
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21 if stdscr:getch() == 410 then
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22 view:resized();
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23 else
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24 curses.ungetch(ch);
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25 end
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26 end
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27 return 0.2;
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28 end);
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30 timer.add_task(0, function ()
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31 view:draw();
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32 return 1;
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33 end);
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35 --[[
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36 posix.signal(28, function ()
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37 table.insert(view.conn_list, { jid = "WINCH" });
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38 --view:draw();
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39 end);
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40 ]]
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41
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42 -- Fake socket object around stdin
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43 local stdin = {
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44 getfd = function () return 0; end;
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45 dirty = function (self) return false; end;
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46 settimeout = function () end;
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47 send = function (_, d) return #d, 0; end;
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48 close = function () end;
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49 receive = function (_, patt)
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50 local ch = stdscr:getch();
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51 if ch >= 0 and ch <=255 then
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52 return string.char(ch);
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53 elseif ch == 410 then
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54 view:resized();
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55 else
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56 table.insert(view.conn_list, { jid = tostring(ch) }); --FIXME
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57 end
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58 return "";
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59 end
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60 };
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61 local function on_incoming(stdin, text)
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62 -- TODO: Handle keypresses
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63 if text:lower() == "q" then os.exit(); end
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64 end
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65 stdin = server.wrapclient(stdin, "stdin", 0, {
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66 onincoming = on_incoming, ondisconnect = function () end
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67 }, "*a");
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68
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69 local function handle_line(line)
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70 local e = {
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71 STAT = function (name) return function (value)
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72 view:update_stat(name, value);
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73 end end;
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74 SESS = function (id) return function (jid) return function (stats)
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75 view:update_session(id, jid, stats);
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76 end end end;
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77 };
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78 local chunk = assert(loadstring(line));
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79 setfenv(chunk, e);
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80 chunk();
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81 end
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82
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83 local stats_listener = {};
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84
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85 function stats_listener.onconnect(conn)
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86 --stdscr:mvaddstr(6, 0, "CONNECTED");
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87 end
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88
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89 local partial;
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90 function stats_listener.onincoming(conn, data)
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91 --print("DATA", data)
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92 if partial then
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93 partial, data = nil, partial..data;
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94 end
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95 if not data:match("\n") then
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96 partial = data;
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97 return;
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98 end
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99 local lastpos = 1;
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100 for line, pos in data:gmatch("([^\n]+)\n()") do
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101 lastpos = pos;
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102 handle_line(line);
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103 end
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104 if lastpos == #data then
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105 partial = nil;
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106 else
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107 partial = data:sub(lastpos);
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108 end
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109 end
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110
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111 function stats_listener.ondisconnect(conn, err)
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112 stdscr:mvaddstr(6, 0, "DISCONNECTED: "..(err or "unknown"));
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113 end
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114
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115 local conn = require "socket".tcp();
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116 assert(conn:connect("localhost", 5782));
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117 handler = server.wrapclient(conn, "localhost", 5279, stats_listener, "*a");
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118 end
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119
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120 return {
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121 run = function ()
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122 --os.setlocale("UTF-8", "all")
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123
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124 curses.initscr()
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125 curses.cbreak()
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126 curses.echo(false) -- not noecho !
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127 curses.nl(false) -- not nonl !
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128 curses.timeout(0);
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129
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130 local ok, err = pcall(main);
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131
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132 --while true do stdscr:getch() end
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133 --stdscr:endwin()
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134
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135 if ok then
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136 ok, err = xpcall(server.loop, debug.traceback);
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137 end
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138
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139 curses.endwin();
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140
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141 --stdscr:refresh();
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142 if not ok then
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143 print(err);
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144 end
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145
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146 print"DONE"
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147 end;
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148 };