applications/luci-statistics/luasrc/statistics/datatree.lua

   1 --[[
   2
   3 Luci statistics - rrd data tree builder
   4 (c) 2008 Freifunk Leipzig / Jo-Philipp Wich <xm@leipzig.freifunk.net>
   5
   6 Licensed under the Apache License, Version 2.0 (the "License");
   7 you may not use this file except in compliance with the License.
   8 You may obtain a copy of the License at
   9
  10         http://www.apache.org/licenses/LICENSE-2.0
  11
  12 $Id$
  13
  14 ]]--
  15
  16 module("luci.statistics.datatree", package.seeall)
  17
  18 local util = require("luci.util")
  19 local sys  = require("luci.sys")
  20 local fs   = require("luci.fs")
  21 local uci  = require("luci.model.uci").Session()
  22 local sections = uci:sections( "luci_statistics" )
  23
  24
  25 Instance = util.class()
  26
  27 function Instance.__init__( self, host )
  28         self._host    = host or sections.collectd.Hostname or sys.hostname()
  29         self._libdir  = sections.collectd.PluginDir        or "/usr/lib/collectd"
  30         self._rrddir  = sections.collectd_rrdtool.DataDir  or "/tmp/rrd"
  31
  32         self._libdir  = self._libdir:gsub("/$","")
  33         self._rrddir  = self._rrddir:gsub("/$","")
  34         self._plugins = { }
  35
  36         self:_scan()
  37 end
  38
  39 function Instance._mkpath( self, plugin, pinstance )
  40         local dir = self._rrddir .. "/" .. self._host
  41
  42         if type(plugin) == "string" and plugin:len() > 0 then
  43                 dir = dir .. "/" .. plugin
  44
  45                 if type(pinstance) == "string" and pinstance:len() > 0 then
  46                         dir = dir .. "-" .. pinstance
  47                 end
  48         end
  49
  50         return dir
  51 end
  52
  53 function Instance._notzero( self, table )
  54         for k in pairs(table) do
  55                 return true
  56         end
  57
  58         return false
  59 end
  60
  61 function Instance._scan( self )
  62         local dir = fs.dir( self._libdir )
  63         if not dir then
  64                 return
  65         end
  66         for i, plugin in ipairs( dir ) do
  67                 if plugin:match("%w+.so") then
  68                         self._plugins[ plugin:gsub(".so", "") ] = { }
  69                 end
  70         end
  71
  72         for plugin, instances in pairs( self._plugins ) do
  73
  74                 local dirs = fs.dir( self:_mkpath() )
  75
  76                 if type(dirs) == "table" then
  77                         for i, dir in ipairs(dirs) do
  78                                 if dir:find( plugin .. "%-" ) or dir == plugin then
  79                                         local instance = ""
  80
  81                                         if dir ~= plugin then
  82                                                 instance = dir:gsub( plugin .. "%-", "", 1 )
  83                                         end
  84
  85                                         instances[instance] = { }
  86                                 end
  87                         end
  88                 end
  89
  90                 for instance, data_instances in pairs( instances ) do
  91
  92                         dirs = fs.dir( self:_mkpath( plugin, instance ) )
  93
  94                         if type(dirs) == "table" then
  95                                 for i, file in ipairs(dirs) do
  96                                         if file:find("%.rrd") then
  97                                                 file = file:gsub("%.rrd","")
  98
  99                                                 local data_type
 100                                                 local data_instance
 101
 102                                                 if file:find("%-") then
 103                                                         data_type     = file:gsub( "%-.+","" )
 104                                                         data_instance = file:gsub( "[^%-]-%-", "", 1 )
 105                                                 else
 106                                                         data_type     = file
 107                                                         data_instance = ""
 108                                                 end
 109
 110                                                 if not data_instances[data_type] then
 111                                                         data_instances[data_type] = { data_instance }
 112                                                 else
 113                                                         table.insert( data_instances[data_type], data_instance )
 114                                                 end
 115                                         end
 116                                 end
 117                         end
 118                 end
 119         end
 120 end
 121
 122
 123 function Instance.plugins( self )
 124         local rv = { }
 125
 126         for plugin, val in pairs( self._plugins ) do
 127                 if self:_notzero( val ) then
 128                         table.insert( rv, plugin )
 129                 end
 130         end
 131
 132         return rv
 133 end
 134
 135 function Instance.plugin_instances( self, plugin )
 136         local rv = { }
 137
 138         for instance, val in pairs( self._plugins[plugin] ) do
 139                 table.insert( rv, instance )
 140         end
 141
 142         return rv
 143 end
 144
 145 function Instance.data_types( self, plugin, instance )
 146         local rv = { }
 147         local p  = self._plugins[plugin]
 148
 149         if type(p) == "table" and type(p[instance]) == "table" then
 150                 for type, val in pairs(p[instance]) do
 151                         table.insert( rv, type )
 152                 end
 153         end
 154
 155         return rv
 156 end
 157
 158 function Instance.data_instances( self, plugin, instance, dtype )
 159         local rv = { }
 160         local p  = self._plugins[plugin]
 161
 162         if type(p) == "table" and type(p[instance]) == "table" and type(p[instance][dtype]) == "table" then
 163                 for i, instance in ipairs(p[instance][dtype]) do
 164                         table.insert( rv, instance )
 165                 end
 166         end
 167
 168         return rv
 169 end