Class: Impulse::Graph

Inherits:
Object
  • Object
show all
Defined in:
lib/impulse.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(debug = false) ⇒ Graph

Returns a new instance of Graph.



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# File 'lib/impulse.rb', line 5

def initialize(debug = false)
  @debug = debug
end

Instance Attribute Details

#debug ⇒ Object (readonly)

Returns the value of attribute debug.



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# File 'lib/impulse.rb', line 3

def debug
  @debug
end

Instance Method Details

#draw(name, time_scale = :day, params = {}, extra_params = nil) ⇒ Object 



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# File 'lib/impulse.rb', line 17

def draw(name, time_scale = :day, params = {}, extra_params = nil)
  params = { 
    :filename => 'impulse.png',
    :rrd_path => '.',
    :output_path => '.', 
    :height => 200, 
    :width => 600, 
    :title => 'Impulse Graph', 
    :vertical => '',
    :legend => '',
    :thickness => 1,
    :sort => false
  }.merge(params)
  
  defaults = "-E -W 'Generated at #{Time.at(Time.now)}' -e now -h #{params[:height]} -w #{params[:width]}"
  cmd = ["rrdtool graph #{params[:output_path]}/#{params[:filename]} -s -#{seconds_for(time_scale)} #{defaults} -t '#{params[:title]}' -v '#{params[:vertical]}'"]
   
  if name.is_a?(Hash)
    max_legend_length = name.keys.size > 1 ? name.keys.max {|a,b| a.length <=> b.length }.length : name.keys.first.length
          
    c = 0
    
    if params[:sort]
      name.keys.sort.each do |k|
        v = name[k]
        legend = "%-#{max_legend_length}s" % k
        v = { :color => '#FF0000', :data => :data }.merge(v)
        cmd << "DEF:d#{c}=#{params[:rrd_path]}/#{v[:name]}.rrd:#{v[:data].to_s}:MAX"
        cmd << "LINE#{params[:thickness]}:d#{c}#{v[:color]}:'#{legend}' GPRINT:d#{c}:LAST:\"Last\\:%8.0lf\" GPRINT:d#{c}:MIN:\"	Min\\:%8.0lf\" GPRINT:d#{c}:AVERAGE:\"	Avg\\:%8.0lf\" GPRINT:d#{c}:MAX:\"	Max\\:%8.0lf\\n\""
        c += 1
      end
    else
      name.each do |k,v|
        legend = "%-#{max_legend_length}s" % k
        v = { :color => '#FF0000', :data => :data }.merge(v)
        cmd << "DEF:d#{c}=#{params[:rrd_path]}/#{v[:name]}.rrd:#{v[:data].to_s}:MAX"
        cmd << "LINE#{params[:thickness]}:d#{c}#{v[:color]}:'#{legend}' GPRINT:d#{c}:LAST:\"Last\\:%8.0lf\" GPRINT:d#{c}:MIN:\"	Min\\:%8.0lf\" GPRINT:d#{c}:AVERAGE:\"	Avg\\:%8.0lf\" GPRINT:d#{c}:MAX:\"	Max\\:%8.0lf\\n\""
        c += 1
      end
    end

  else
    cmd << "DEF:average=#{params[:rrd_path]}/#{name}.rrd:data:MAX"
    cmd << "LINE#{params[:thickness]}:average#FF0000:'#{params[:legend]}' GPRINT:average:LAST:\"Last\\:%8.0lf\" GPRINT:average:MIN:\"	Min\\:%8.0lf\" GPRINT:average:AVERAGE:\"	Avg\\:%8.0lf\" GPRINT:average:MAX:\"	Max\\:%8.0lf\\n\""
  end

  cmd << extra_params unless extra_params.nil?
  system cmd.join(" ")
end

#push(name, datas, params = {}) ⇒ Object 



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# File 'lib/impulse.rb', line 9

def push(name, datas, params = {})
  params = { 
    :rrd_path => '.',
  }.merge(params)
  create_or_find_rrd(name, datas, params)
  push_to_rrd(name, datas, params)
end