Class: Metriks::Reporter::Graphite

Inherits:
Object
  • Object
show all
Defined in:
lib/metriks/reporter/graphite.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(host, port, options = {}) ⇒ Graphite

Returns a new instance of Graphite.



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# File 'lib/metriks/reporter/graphite.rb', line 7

def initialize(host, port, options = {})
  @host = host
  @port = port

  @prefix = options[:prefix]

  @registry  = options[:registry] || Metriks::Registry.default
  @interval  = options[:interval] || 60
  @on_error  = options[:on_error] || proc { |ex| }
end

Instance Attribute Details

#host ⇒ Object (readonly)

Returns the value of attribute host.



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# File 'lib/metriks/reporter/graphite.rb', line 5

def host
  @host
end

#port ⇒ Object (readonly)

Returns the value of attribute port.



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# File 'lib/metriks/reporter/graphite.rb', line 5

def port
  @port
end

Instance Method Details

#restart ⇒ Object 



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# File 'lib/metriks/reporter/graphite.rb', line 44

def restart
  stop
  start
end

#socket ⇒ Object 



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# File 'lib/metriks/reporter/graphite.rb', line 18

def socket
  @socket = nil if @socket && @socket.closed?
  @socket ||= TCPSocket.new(@host, @port)
end

#start ⇒ Object 



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# File 'lib/metriks/reporter/graphite.rb', line 23

def start
  @thread ||= Thread.new do
    loop do
      sleep @interval

      Thread.new do
        begin
          write
        rescue Exception => ex
          @on_error[ex] rescue nil
        end
      end
    end
  end
end

#stop ⇒ Object 



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# File 'lib/metriks/reporter/graphite.rb', line 39

def stop
  @thread.kill if @thread
  @thread = nil
end

#write ⇒ Object 



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# File 'lib/metriks/reporter/graphite.rb', line 49

def write
  @registry.each do |name, metric|
    case metric
    when Metriks::Meter
      write_metric name, metric, [
        :count, :one_minute_rate, :five_minute_rate,
        :fifteen_minute_rate, :mean_rate
      ]
    when Metriks::Counter
      write_metric name, metric, [
        :count
      ]
    when Metriks::Gauge
      write_metric name, metric, [
        :value
      ]
    when Metriks::UtilizationTimer
      write_metric name, metric, [
        :count, :one_minute_rate, :five_minute_rate,
        :fifteen_minute_rate, :mean_rate,
        :min, :max, :mean, :stddev,
        :one_minute_utilization, :five_minute_utilization,
        :fifteen_minute_utilization, :mean_utilization,
      ], [
        :median, :get_95th_percentile
      ]
    when Metriks::Timer
      write_metric name, metric, [
        :count, :one_minute_rate, :five_minute_rate,
        :fifteen_minute_rate, :mean_rate,
        :min, :max, :mean, :stddev
      ], [
        :median, :get_95th_percentile
      ]
    when Metriks::Histogram
      write_metric name, metric, [
        :count, :min, :max, :mean, :stddev
      ], [
        :median, :get_95th_percentile
      ]
    end
  end
end

#write_metric(base_name, metric, keys, snapshot_keys = []) ⇒ Object 



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# File 'lib/metriks/reporter/graphite.rb', line 93

def write_metric(base_name, metric, keys, snapshot_keys = [])
  time = Time.now.to_i

  base_name = base_name.to_s.gsub(/ +/, '_')
  if @prefix
    base_name = "#{@prefix}.#{base_name}"
  end

  keys.flatten.each do |key|
    name = key.to_s.gsub(/^get_/, '')
    value = metric.send(key)
    socket.write("#{base_name}.#{name} #{value} #{time}\n")
  end

  unless snapshot_keys.empty?
    snapshot = metric.snapshot
    snapshot_keys.flatten.each do |key|
      name = key.to_s.gsub(/^get_/, '')
      value = snapshot.send(key)
      socket.write("#{base_name}.#{name} #{value} #{time}\n")
    end
  end
rescue Errno::EPIPE
  socket.close
end