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# File 'lib/focuslight/rrd.rb', line 153
def graph(datas, args)
datas = [datas] unless datas.is_a?(Array)
span = args.fetch(:t, :d)
from = args[:from]
to = args[:to]
width = args.fetch(:width, 390)
height = args.fetch(:height, 110)
period_title, period, period_end, xgrid = calc_period(span, from, to)
tmpfile = Tempfile.new(["", ".png"])
rrdoptions = [
tmpfile.path,
'-w', width,
'-h', height,
'-a', 'PNG',
'-l', 0,
'-u', 2,
'-x', (args[:xgrid].empty? ? xgrid : args[:xgrid]),
'-s', period,
'-e', period_end,
'--slope-mode',
'--disable-rrdtool-tag',
'--color', 'BACK#' + args[:background_color].to_s.upcase,
'--color', 'CANVAS#' + args[:canvas_color].to_s.upcase,
'--color', 'FONT#' + args[:font_color].to_s.upcase,
'--color', 'FRAME#' + args[:frame_color].to_s.upcase,
'--color', 'AXIS#' + args[:axis_color].to_s.upcase,
'--color', 'SHADEA#' + args[:shadea_color].to_s.upcase,
'--color', 'SHADEB#' + args[:shadeb_color].to_s.upcase,
'--border', args[:border].to_s.upcase
]
rrdoptions.push('-y', args[:ygrid]) unless args[:ygrid].empty?
rrdoptions.push('-t', period_title.to_s.dup) unless args[:notitle]
rrdoptions.push('-v', args[:vertical_label]) unless args[:vertical_label].empty?
rrdoptions.push('--no-legend') unless args[:legend]
rrdoptions.push('--only-graph') if args[:graphonly]
rrdoptions.push('--logarithmic') if args[:logarithmic]
rrdoptions.push('--font', "AXIS:8:")
rrdoptions.push('--font', "LEGEND:8:")
rrdoptions.push('-u', args[:upper_limit]) unless args[:upper_limit].empty?
rrdoptions.push('-l', args[:lower_limit]) unless args[:lower_limit].empty?
rrdoptions.push('-r') if args[:rigid]
rrdoptions.push('--units-exponent', args[:units_exponent]) if args[:units_exponent]
defs = []
datas.each_with_index do |data, i|
type = data.c_type ? data.c_type : data.type
gdata = 'num'
llimit = data.llimit
ulimit = data.ulimit
stack = (data.stack && i > 0 ? ':STACK' : '')
file = (span =~ /^s/ ? path(data, :short) : path(data, :long))
unit = (data.unit || '').gsub('%', '%%')
rrdoptions.push(
'DEF:%s%dt=%s:%s:AVERAGE' % [gdata, i, file, gdata],
'CDEF:%s%d=%s%dt,%s,%s,LIMIT,%d,%s' % [gdata, i, gdata, i, llimit, ulimit, data.adjustval, data.adjust],
'%s:%s%d%s:%s %s' % [type, gdata, i, data.color, _escape(data.graph), stack],
'GPRINT:%s%d:LAST:Cur\: %%4.1lf%%s%s' % [gdata, i, unit],
'GPRINT:%s%d:AVERAGE:Avg\: %%4.1lf%%s%s' % [gdata, i, unit],
'GPRINT:%s%d:MAX:Max\: %%4.1lf%%s%s' % [gdata, i, unit],
'GPRINT:%s%d:MIN:Min\: %%4.1lf%%s%s\l' % [gdata, i, unit],
'VDEF:%s%dcur=%s%d,LAST' % [gdata, i, gdata, i],
'PRINT:%s%dcur:%%.8lf' % [gdata, i],
'VDEF:%s%davg=%s%d,AVERAGE' % [gdata, i, gdata, i],
'PRINT:%s%davg:%%.8lf' % [gdata, i],
'VDEF:%s%dmax=%s%d,MAXIMUM' % [gdata, i, gdata, i],
'PRINT:%s%dmax:%%.8lf' % [gdata, i],
'VDEF:%s%dmin=%s%d,MINIMUM' % [gdata, i, gdata, i],
'PRINT:%s%dmin:%%.8lf' % [gdata, i],
)
defs << ('%s%d' % [gdata, i])
end
if args[:sumup]
sumup = [ defs.shift ]
unit = datas.first.unit.gsub('%', '%%')
defs.each do |d|
sumup.push(d, '+')
end
rrdoptions.push(
'CDEF:sumup=%s' % [ sumup.join(',') ],
'LINE0:sumup#cccccc:total',
'GPRINT:sumup:LAST:Cur\: %%4.1lf%%s%s' % [unit],
'GPRINT:sumup:AVERAGE:Avg\: %%4.1lf%%s%s' % [unit],
'GPRINT:sumup:MAX:Max\: %%4.1lf%%s%s' % [unit],
'GPRINT:sumup:MIN:Min\: %%4.1lf%%s%s\l' % [unit],
'VDEF:sumupcur=sumup,LAST',
'PRINT:sumupcur:%.8lf',
'VDEF:sumupavg=sumup,AVERAGE',
'PRINT:sumupavg:%.8lf',
'VDEF:sumupmax=sumup,MAXIMUM',
'PRINT:sumupmax:%.8lf',
'VDEF:sumupmin=sumup,MINIMUM',
'PRINT:sumupmin:%.8lf',
)
end
ret = RRD::Wrapper.graph(*rrdoptions.map(&:to_s))
unless ret
tmpfile.close!
raise "RRDtool returns error to draw graph, error: #{RRD::Wrapper.error}"
end
graph_img = IO.binread(tmpfile.path);
tmpfile.delete
[
"/var/folders/tl/xtb7dnc132nggd6hs83y58h40000gq/T/20140117-86285-1igjvvh.png",
"-w", 390,
"-h", 110,
"-a", "PNG",
"-l", 0,
"-u", 2,
"-x", "HOUR:1:HOUR:2:HOUR:2:0:%H",
"-s", -118800,
"-e", "now",
"--slope-mode",
"--disable-rrdtool-tag",
"--color", "BACK#F3F3F3", "--color", "CANVAS#FFFFFF", "--color", "FONT#000000",
"--color", "FRAME#000000", "--color", "AXIS#000000", "--color", "SHADEA#CFCFCF",
"--color", "SHADEB#9E9E9E",
"--border", "3",
"-t", "Day (1min avg)",
"--no-legend",
"--font", "AXIS:8:",
"--font", "LEGEND:8:",
"DEF:num0t=./data/c4ca4238a0b923820dcc509a6f75849b.rrd:num:AVERAGE",
"CDEF:num0=num0t,-1000000000.0,1.0e+15,LIMIT,1,*",
"AREA:num0:one",
"GPRINT:num0:LAST:Cur\\: %4.1lf%s",
"GPRINT:num0:AVERAGE:Avg\\: %4.1lf%s",
"GPRINT:num0:MAX:Max\\: %4.1lf%s",
"GPRINT:num0:MIN:Min\\: %4.1lf%s\\l",
"VDEF:num0cur=num0,LAST",
"PRINT:num0cur:%.8lf",
"VDEF:num0avg=num0,AVERAGE",
"PRINT:num0avg:%.8lf",
"VDEF:num0max=num0,MAXIMUM",
"PRINT:num0max:%.8lf",
"VDEF:num0min=num0,MINIMUM",
"PRINT:num0min:%.8lf"
]
graph_img
end
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