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--[[
Luci statistics - rrd data tree builder
(c) 2008 Freifunk Leipzig / Jo-Philipp Wich <xm@leipzig.freifunk.net>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
$Id$
]]--
module("luci.statistics.datatree", package.seeall)
local util = require("luci.util")
local sys = require("luci.sys")
local fs = require("luci.fs")
local uci = require("luci.model.uci").cursor()
local sections = uci:get_all( "luci_statistics" )
Instance = util.class()
function Instance.__init__( self, host )
self._host = host or sections.collectd.Hostname or sys.hostname()
self._libdir = sections.collectd.PluginDir or "/usr/lib/collectd"
self._rrddir = sections.collectd_rrdtool.DataDir or "/tmp/rrd"
self._libdir = self._libdir:gsub("/$","")
self._rrddir = self._rrddir:gsub("/$","")
self._plugins = { }
self:_scan()
end
function Instance._mkpath( self, plugin, pinstance )
local dir = self._rrddir .. "/" .. self._host
if type(plugin) == "string" and plugin:len() > 0 then
dir = dir .. "/" .. plugin
if type(pinstance) == "string" and pinstance:len() > 0 then
dir = dir .. "-" .. pinstance
end
end
return dir
end
function Instance._notzero( self, table )
for k in pairs(table) do
return true
end
return false
end
function Instance._scan( self )
local dir = fs.dir( self._libdir )
if not dir then
return
end
for i, plugin in ipairs( dir ) do
if plugin:match("%w+.so") then
self._plugins[ plugin:gsub(".so", "") ] = { }
end
end
for plugin, instances in pairs( self._plugins ) do
local dirs = fs.dir( self:_mkpath() )
if type(dirs) == "table" then
for i, dir in ipairs(dirs) do
if dir:find( plugin .. "%-" ) or dir == plugin then
local instance = ""
if dir ~= plugin then
instance = dir:gsub( plugin .. "%-", "", 1 )
end
instances[instance] = { }
end
end
end
for instance, data_instances in pairs( instances ) do
dirs = fs.dir( self:_mkpath( plugin, instance ) )
if type(dirs) == "table" then
for i, file in ipairs(dirs) do
if file:find("%.rrd") then
file = file:gsub("%.rrd","")
local data_type
local data_instance
if file:find("%-") then
data_type = file:gsub( "%-.+","" )
data_instance = file:gsub( "[^%-]-%-", "", 1 )
else
data_type = file
data_instance = ""
end
if not data_instances[data_type] then
data_instances[data_type] = { data_instance }
else
table.insert( data_instances[data_type], data_instance )
end
end
end
end
end
end
end
function Instance.plugins( self )
local rv = { }
for plugin, val in pairs( self._plugins ) do
if self:_notzero( val ) then
table.insert( rv, plugin )
end
end
return rv
end
function Instance.plugin_instances( self, plugin )
local rv = { }
for instance, val in pairs( self._plugins[plugin] ) do
table.insert( rv, instance )
end
return rv
end
function Instance.data_types( self, plugin, instance )
local rv = { }
local p = self._plugins[plugin]
if type(p) == "table" and type(p[instance]) == "table" then
for type, val in pairs(p[instance]) do
table.insert( rv, type )
end
end
return rv
end
function Instance.data_instances( self, plugin, instance, dtype )
local rv = { }
local p = self._plugins[plugin]
if type(p) == "table" and type(p[instance]) == "table" and type(p[instance][dtype]) == "table" then
for i, instance in ipairs(p[instance][dtype]) do
table.insert( rv, instance )
end
end
return rv
end
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