Class: Instrumental::Agent

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/instrumental/agent.rb

Constant Summary collapse

@@queue = 
{ :count => {}, :measure => {} }
@@queue_mutex = 
Mutex.new

Instance Method Summary collapse

Instance Method Details

#milestone(name = Time.now.utc.to_s) ⇒ Object 



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# File 'lib/instrumental/agent.rb', line 28

def milestone(name = Time.now.utc.to_s)
  post_response("#{ config.path }/milestone", { :name => name })
end

#report(type, name, value) ⇒ Object 



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# File 'lib/instrumental/agent.rb', line 12

def report(type, name, value)
  # TODO: Print this to log?
  return nil unless config && config.enabled?

  type = type.to_sym
  @@queue_mutex.synchronize do
    if type == :count
      @@queue[:count][name] ||= 0
      @@queue[:count][name] += value
    else
      @@queue[:measure][name] ||= []
      @@queue[:measure][name] << value
    end
  end
end

#setup_and_run ⇒ Object 



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# File 'lib/instrumental/agent.rb', line 32

def setup_and_run
  @intervalometer = Intervalometer.new(config.report_interval)

  config.logger.debug("Starting agent. Reporting every #{config.report_interval} seconds")
  @thread = Thread.new do
    begin
      @intervalometer.run do
        config.logger.debug('Intervalometer run')
        new_queue_items = {}
        @@queue_mutex.synchronize do
          new_queue_items = @@queue.dup
          @@queue[:count] = {}
          @@queue[:measure] = {}
          config.logger.debug("Queue contains #{new_queue_items.inspect}")
        end

        new_queue_items[:count].each do |name, value|
          send_report(:count, name, value)
        end

        new_queue_items[:measure].each do |name, values|
          send_report(:measure, name, values.join(','))
        end
      end
    rescue => e
      config.logger.error e
      config.logger.error e.backtrace.join("\n")
    end
  end
end

#stop ⇒ Object 



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# File 'lib/instrumental/agent.rb', line 63

def stop
  # If the app crashes, Passenger calls halt as it winds-down the process.
  # Only call halt if intervalometer exists.
  @intervalometer && @intervalometer.halt
end