Method: Focuslight::RRD#path

Defined in:
lib/focuslight/rrd.rb

#path(graph, target = :normal) ⇒ Object 



44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
 
# File 'lib/focuslight/rrd.rb', line 44

def path(graph, target=:normal)
  dst = (graph.mode == 'derive' ? 'DERIVE' : 'GAUGE')
  filepath = nil
  rrdoptions = nil
  if target == :short
    filepath = File.join(@datadir, graph.md5 + '_s.rrd')
    rrdoptions = rrd_create_options_short(dst)
  else # :long
    filepath = File.join(@datadir, graph.md5 + '.rrd')
    rrdoptions = rrd_create_options_long(dst)
  end
  unless File.exists?(filepath)
    ret = RRD::Wrapper.create(filepath, *rrdoptions.map(&:to_s))
    unless ret
      # TODO: error logging / handling
      raise "RRDtool returns error to create #{filepath}, error: #{RRD::Wrapper.error}"
    end
  end
  filepath
end