Class: Mouth::Sucker

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Sucker

Returns a new instance of Sucker.



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# File 'lib/mouth/sucker.rb', line 38

def initialize(options = {})
  self.host = options[:host] || "localhost"
  self.port = options[:port] || 8889
  self.mongo_db_name = options[:mongo_db_name] || "mouth"
  hostports = options[:mongo_hostports] || [["localhost", EM::Mongo::DEFAULT_PORT]]
  self.mongo_hostports = hostports.collect do |hp|
    if hp.is_a?(String)
      host, port = hp.split(":")
      [host, port || EM::Mongo::DEFAULT_PORT]
    else
      hp
    end
  end
  
  self.udp_packets_received = 0
  self.mongo_flushes = 0
  
  self.counters = {}
  self.timers = {}
  self.gauges = {}
end

Instance Attribute Details

#counters ⇒ Object

Accumulators of our data



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# File 'lib/mouth/sucker.rb', line 30

def counters
  @counters
end

#gauges ⇒ Object

Returns the value of attribute gauges.



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# File 'lib/mouth/sucker.rb', line 32

def gauges
  @gauges
end

#host ⇒ Object

Host/Port to suck UDP packets on



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# File 'lib/mouth/sucker.rb', line 19

def host
  @host
end

#mongo ⇒ Object

Actual EM::Mongo connection



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# File 'lib/mouth/sucker.rb', line 23

def mongo
  @mongo
end

#mongo_db_name ⇒ Object

Info to connect to mongo



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# File 'lib/mouth/sucker.rb', line 26

def mongo_db_name
  @mongo_db_name
end

#mongo_flushes ⇒ Object

Returns the value of attribute mongo_flushes.



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# File 'lib/mouth/sucker.rb', line 36

def mongo_flushes
  @mongo_flushes
end

#mongo_hostports ⇒ Object

Returns the value of attribute mongo_hostports.



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# File 'lib/mouth/sucker.rb', line 27

def mongo_hostports
  @mongo_hostports
end

#port ⇒ Object

Returns the value of attribute port.



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# File 'lib/mouth/sucker.rb', line 20

def port
  @port
end

#timers ⇒ Object

Returns the value of attribute timers.



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# File 'lib/mouth/sucker.rb', line 31

def timers
  @timers
end

#udp_packets_received ⇒ Object

Stats



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# File 'lib/mouth/sucker.rb', line 35

def udp_packets_received
  @udp_packets_received
end

Instance Method Details

#flush! ⇒ Object 



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# File 'lib/mouth/sucker.rb', line 121

def flush!
  ts = Mouth.current_timestamp
  limit_ts = ts - 1
  mongo_docs = {}
  
  # We're going to construct mongo_docs which look like this:
  # "mycollections:234234": {  # NOTE: this timpstamp will be popped into .t = 234234
  #   c: {
  #     happenings: 37,
  #     affairs: 3
  #   },
  #   m: {
  #     occasions: {...}
  #   },
  #   g: {things: 3}
  # }
  
  self.counters.each do |cur_ts, counters_to_save|
    if cur_ts <= limit_ts
      counters_to_save.each do |counter_key, value|
        ns, sub_key = Mouth.parse_key(counter_key)
        mongo_key = "#{ns}:#{ts}"
        mongo_docs[mongo_key] ||= {}
        
        cur_mongo_doc = mongo_docs[mongo_key]
        cur_mongo_doc["c"] ||= {}
        cur_mongo_doc["c"][sub_key] = value
      end
      
      self.counters.delete(cur_ts)
    end
  end
  
  self.gauges.each do |cur_ts, gauges_to_save|
    if cur_ts <= limit_ts
      gauges_to_save.each do |gauge_key, value|
        ns, sub_key = Mouth.parse_key(gauge_key)
        mongo_key = "#{ns}:#{ts}"
        mongo_docs[mongo_key] ||= {}
        
        cur_mongo_doc = mongo_docs[mongo_key]
        cur_mongo_doc["g"] ||= {}
        cur_mongo_doc["g"][sub_key] = value
      end
      
      self.gauges.delete(cur_ts)
    end
  end
  
  self.timers.each do |cur_ts, timers_to_save|
    if cur_ts <= limit_ts
      timers_to_save.each do |timer_key, values|
        ns, sub_key = Mouth.parse_key(timer_key)
        mongo_key = "#{ns}:#{ts}"
        mongo_docs[mongo_key] ||= {}
        
        cur_mongo_doc = mongo_docs[mongo_key]
        cur_mongo_doc["m"] ||= {}
        cur_mongo_doc["m"][sub_key] = analyze_timer(values)
      end
      
      self.timers.delete(cur_ts)
    end
  end
  
  save_documents!(mongo_docs)
end

#save_documents!(mongo_docs) ⇒ Object 



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# File 'lib/mouth/sucker.rb', line 189

def save_documents!(mongo_docs)
  Mouth.logger.info "Saving Docs: #{mongo_docs.inspect}"
  
  mongo_docs.each do |key, doc|
    ns, ts = key.split(":")
    collection_name = Mouth.mongo_collection_name(ns)
    doc["t"] = ts.to_i
    
    self.mongo.collection(collection_name).insert(doc)
  end
  
  self.mongo_flushes += 1 if mongo_docs.any?
end

#set_procline! ⇒ Object 



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# File 'lib/mouth/sucker.rb', line 213

def set_procline!
  $0 = "mouth [started] [UDP Recv: #{self.udp_packets_received}] [Mongo saves: #{self.mongo_flushes}]"
end

#store!(data) ⇒ Object

counter: gorets:1|c counter w/ sampling: gorets:1|c|@0.1 timer: glork:320|ms gauge: gaugor:333|g



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# File 'lib/mouth/sucker.rb', line 88

def store!(data)
  key_value, command_sampling = data.to_s.split("|", 2)
  key, value = key_value.to_s.split(":")
  command, sampling = command_sampling.to_s.split("|")
  
  return unless key && value && command && key.length > 0 && value.length > 0 && command.length > 0
  
  key = Mouth.parse_key(key).join(".")
  value = value.to_f
  
  ts = Mouth.current_timestamp
  
  if command == "ms"
    self.timers[ts] ||= {}
    self.timers[ts][key] ||= []
    self.timers[ts][key] << value
  elsif command == "c"
    factor = 1.0
    if sampling
      factor = sampling.sub("@", "").to_f
      factor = (factor == 0.0 || factor > 1.0) ? 1.0 : 1.0 / factor
    end
    self.counters[ts] ||= {}
    self.counters[ts][key] ||= 0.0
    self.counters[ts][key] += value * factor
  elsif command == "g"
    self.gauges[ts] ||= {}
    self.gauges[ts][key] = value
  end
  
  self.udp_packets_received += 1
end

#suck! ⇒ Object 



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# File 'lib/mouth/sucker.rb', line 60

def suck!
  EM.run do
    # Connect to mongo now
    self.mongo

    EM.open_datagram_socket host, port, SuckerConnection do |conn|
      conn.sucker = self
    end
    
    EM.add_periodic_timer(10) do
      Mouth.logger.info "Counters: #{self.counters.inspect}"
      Mouth.logger.info "Timers: #{self.timers.inspect}"
      Mouth.logger.info "Gauges: #{self.gauges.inspect}"
      self.flush!
      self.set_procline!
    end

    EM.next_tick do
      Mouth.logger.info "Mouth reactor started..."
      self.set_procline!
    end
  end
end