Class: Murakumo::ActivityChecker

Inherits:
Object
  • Object
show all
Defined in:
lib/srv/murakumo_activity_checker.rb

Instance Method Summary collapse

Constructor Details

#initialize(address, name, cloud, logger, options) ⇒ ActivityChecker

Returns a new instance of ActivityChecker.



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# File 'lib/srv/murakumo_activity_checker.rb', line 10

def initialize(address, name, cloud, logger, options)
  @address = address
  @name = name
  @cloud = cloud
  @logger = logger
  @options = options

  # 各種変数の設定
  ['interval', 'start-delay', 'active', 'inactive', 'init-status'].each {|key|
    value = options[key]
    instance_variable_set("@#{key.gsub('-', '_')}", value)
  }

  # 通知オブジェクトの設定
  if options[:notification]
    @notifier = ActivityCheckNotifier.new(@address, @name, @logger, options[:notification])
  end

  # イベントハンドラの設定
  @on_activate = options['on-activate']
  @on_inactivate = options['on-inactivate']
end

Instance Method Details

#alive? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/srv/murakumo_activity_checker.rb', line 143

def alive?
  @alive
end

#mark_active ⇒ Object 



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# File 'lib/srv/murakumo_activity_checker.rb', line 33

def mark_active
  if @activated.nil?
    # 状態がなかったら、まず状態をセット
    @logger.info("initial activity: #{@name}: active")
    @activated = true
  elsif @activated == true # わざとですよ…
    @inactive_count = 0
  elsif (@active_count += 1) >= @active
    toggle_activity
  end
end

#mark_inactive ⇒ Object 



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# File 'lib/srv/murakumo_activity_checker.rb', line 45

def mark_inactive
  if @activated.nil?
    # 状態がなかったら、まず状態をセット
    @logger.info("initial activity: #{@name}: inactive")
    @activated = false
  elsif @activated == false # わざとですよ…
    @active_count = 0
  elsif (@inactive_count += 1) >= @inactive
    toggle_activity
  end
end

#start ⇒ Object 



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# File 'lib/srv/murakumo_activity_checker.rb', line 74

def start
  # 各種変数は初期状態にする
  @alive = true
  @active_count = 0
  @inactive_count = 0

  # アクティビティの初期状態を設定
  case @init_status
  when :active
    @activated = true
    @logger.info("initial activity: #{@name}: active")
  when :inactive
    @activated = false
    @logger.info("initial activity: #{@name}: inactive")
  else
    @activated = nil
  end

  # 既存のスレッドは破棄
  if @thread and @thread.alive?
    begin
      @thread.kill
    rescue ThreadError
    end
  end

  @thread = Thread.start {
    begin
      # 初回実行の遅延
      if @start_delay
        @logger.debug("activity check is delaying: #{@name}")
        sleep @start_delay
        @start_delay = nil
        @logger.debug("activity check is starting: #{@name}")
      end

      while @alive
        retval = nil

        begin
          retval = validate_activity
        rescue => e
          retval = false
          message = (["#{e.class}: #{e.message}"] + (e.backtrace || [])).join("\n\tfrom ")
          @logger.error("activity check failed: #{@name}: #{message}")
        end

        status = retval == true ? 'active' : retval == false ? 'inactive' : '-'
        @logger.debug("result of a activity check: #{@name}: #{status}")

        if retval == true
          mark_active
        elsif retval == false
          mark_inactive
        end

        sleep @interval
      end # while
    rescue Exception => e
      message = (["#{e.class}: #{e.message}"] + (e.backtrace || [])).join("\n\tfrom ")
      @logger.error("#{@name}: #{message}")
    end # begin
  }
end

#stop ⇒ Object 



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# File 'lib/srv/murakumo_activity_checker.rb', line 139

def stop
  @alive = false
end

#toggle_activity ⇒ Object 



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# File 'lib/srv/murakumo_activity_checker.rb', line 57

def toggle_activity
  @activated = !@activated
  @active_count = 0
  @inactive_count = 0

  status = @activated ? 'active' : 'inactive'
  @logger.info("activity condition changed: #{@name}: #{status}")

  if @activated
    @notifier.notify_active if @notifier
    handle_event(@on_activate, 'active') if @on_activate
  else
    @notifier.notify_inactive if @notifier
    handle_event(@on_inactivate, 'inactive') if @on_inactivate
  end
end