Class: Metrics::Reporters::Librato

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby-metrics/reporters/librato.rb

Constant Summary collapse

API_URL = 
"https://metrics-api.librato.com/v1"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Librato

Returns a new instance of Librato.



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# File 'lib/ruby-metrics/reporters/librato.rb', line 13

def initialize(options = {})
  @api_token = options[:api_token]
  @user = options[:user] 
  @headers = {
    'User-Agent' => "ruby-metrics #{Metrics::VERSION}"
  }
end

Instance Attribute Details

#api_token ⇒ Object (readonly)

Returns the value of attribute api_token.



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# File 'lib/ruby-metrics/reporters/librato.rb', line 8

def api_token
  @api_token
end

#user ⇒ Object (readonly)

Returns the value of attribute user.



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# File 'lib/ruby-metrics/reporters/librato.rb', line 9

def user
  @user
end

Instance Method Details

#report(agent) ⇒ Object 



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# File 'lib/ruby-metrics/reporters/librato.rb', line 45

def report(agent)

  agent.instruments.each do |name, instrument|
    nothing_to_do = false
    measure_time = Time.now.to_i

    case instrument.class.to_s
      when "Metrics::Instruments::Counter"
        value = instrument.to_i
        post_url = "#{API_URL}/counters/#{name}.json" 
        post_data = {:measure_time => measure_time, :value => value.to_i}
        send_data(post_url, post_data)
      when "Metrics::Instruments::Gauge"
        post_url = "#{API_URL}/gauges/#{name}.json"
        if instrument.get.is_a? Hash
          instrument.get.each do |key, value|
            post_data = {:measure_time => measure_time, :source => key, :value => value}
            send_data(post_url, post_data)
          end
        else 
          post_data = {:measure_time => measure_time, :value => instrument.get}
          send_data(post_url, post_data)
        end
      when "Metrics::Instruments::Timer"
        post_url = "#{API_URL}/gauges/#{name}.json"
        common_data = {:measure_time => measure_time}

        [:count, :fifteen_minute_rate, :five_minute_rate, :one_minute_rate, :min, :max, :mean].each do |attribute|
          post_data = {:source => attribute, :value => instrument.send(attribute)}.merge(common_data)
          send_data(post_url, post_data)
        end
      else 
        puts "Unhandled instrument"
    end
  end
end

#send_data(post_url, post_data) ⇒ Object 



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# File 'lib/ruby-metrics/reporters/librato.rb', line 21

def send_data(post_url, post_data)
  url = URI.parse(post_url)
  req = Net::HTTP::Post.new(url.path)
  req.basic_auth @user, @api_token
  @headers.each do |k,v|
    req.add_field(k, v)
  end
  req.set_form_data(post_data)
  https = Net::HTTP.new(url.host, url.port)
  https.use_ssl = true
  #https.set_debug_output($stdout)
      
  https.start do |http| 
    result = http.request(req) 
    case result
      when Net::HTTPCreated
        # OK
        puts "SENT!"
      else
        puts "FAILED TO SEND: #{https.inspect}"
    end
  end
end