Module: CounterServer

Defined in:
lib/counter_server.rb,
lib/counter_server/version.rb

Constant Summary collapse

VERSION = 
"0.0.8"
@@counters = 
Hash.new { |h, k| h[k] = 0 }
@@logger = 
Logger.new(STDERR)
@@verbose = 
0
@@backend = 
nil

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.flush ⇒ Object 



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# File 'lib/counter_server.rb', line 66

def self.flush
  @@logger.info "Flushing #{@@counters.size} keys" if @@verbose >= 1
  counters = @@counters.dup
  @@counters.clear

  counters.each_slice(5000) do |counters_slice|
    @@backend.flush do |store|
      counters_slice.each do |key, increment_by|
        super_key, sub_key = key.split('.', 2)
        if sub_key.nil?
          sub_key = super_key
          super_key = 'c'
        end
        restored_sub_key = sub_key.gsub(/;COLON;/, ':').gsub(/;PERIOD;/, '.')
        restored_super_key = super_key.gsub(/;COLON;/, ':').gsub(/;PERIOD;/, '.')
        @@logger.info "Increment: #{restored_super_key}.#{restored_sub_key} += #{increment_by}" if @@verbose >= 2
        store.increment_by(restored_super_key, restored_sub_key, increment_by)
      end
    end
  end
end

.initialize_redis_backend(options) ⇒ Object 



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# File 'lib/counter_server.rb', line 30

def self.initialize_redis_backend(options)
  @@backend = RedisBackend.new(Redis.new(
    :host => options.host, :port => options.port, :db => options.db))
end

.logger ⇒ Object 



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# File 'lib/counter_server.rb', line 22

def self.logger
  @@logger
end

.verbose=(verbose) ⇒ Object 



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# File 'lib/counter_server.rb', line 26

def self.verbose=(verbose)
  @@verbose = verbose
end

Instance Method Details

#receive_data(msg) ⇒ Object 



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# File 'lib/counter_server.rb', line 35

def receive_data(msg)
  msg.split("\n").each do |row|
    bits = row.split(':')

    if bits.size < 2
      raise "Malformed message: #{msg}" 
      next
    end

    key = bits.shift
    bits.each do |record|
      sample_rate = 1
      fields = record.split("|")

      if fields.size < 2
        @@logger.error "Malformed message: #{msg}" 
        next
      end

      if (fields[1].strip == "ms") 
        @@logger.error "Timer updates not supported"
      else
        if (fields[2] && fields[2].match(/^@([\d\.]+)/)) 
          sample_rate = fields[2].match(/^@([\d\.]+)/)[1]
        end
        @@counters[key] += (fields[0].to_i || 1) * (1.0 / sample_rate.to_f)
      end
    end
  end
end