Module: Fluent::FlowcounterSimple

Included in:
Plugin::FlowCounterSimpleFilter, Plugin::FlowCounterSimpleOutput
Defined in:
lib/fluent/plugin/flowcounter_simple.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#last_checked ⇒ Object

Returns the value of attribute last_checked.



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# File 'lib/fluent/plugin/flowcounter_simple.rb', line 5

def last_checked
  @last_checked
end

Class Method Details

.included(klass) ⇒ Object 



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# File 'lib/fluent/plugin/flowcounter_simple.rb', line 7

def self.included(klass)
  klass.helpers :thread
  klass.config_param :indicator, :string, :default => 'num'
  klass.config_param :unit, :string, :default => 'second'
  klass.config_param :comment, :string, :default => nil
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/flowcounter_simple.rb', line 14

def configure(conf)
  super

  @indicator_proc =
    case @indicator
    when 'num'  then Proc.new { |es| es.size }
    when 'byte' then Proc.new { |es|
                       count = 0
                       es.each { |time, record|
                         count += record.to_msgpack.size
                       }
                       count
                     }
    else
      raise Fluent::ConfigError, "flowcounter-simple count allows num/byte"
    end
  @unit =
    case @unit
    when 'second' then :second
    when 'minute' then :minute
    when 'hour' then :hour
    when 'day' then :day
    else
      raise Fluent::ConfigError, "flowcounter-simple unit allows second/minute/hour/day"
    end
  @tick =
    case @unit
    when :second then 1
    when :minute then 60
    when :hour then 3600
    when :day then 86400
    else
      raise Fluent::ConfigError, "@unit must be one of second/minute/hour/day"
    end

  @type_str = self.is_a?(Fluent::Plugin::Filter) ? 'filter' : 'out'
  @output_proc =
    if @comment
      Proc.new { |count| "plugin:#{@type_str}_flowcounter_simple\tcount:#{count}\tindicator:#{@indicator}\tunit:#{@unit}\tcomment:#{@comment}" }
    else
      Proc.new { |count| "plugin:#{@type_str}_flowcounter_simple\tcount:#{count}\tindicator:#{@indicator}\tunit:#{@unit}" }
    end

  @count = 0
  @mutex = Mutex.new
end

#countup(count) ⇒ Object 



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# File 'lib/fluent/plugin/flowcounter_simple.rb', line 70

def countup(count)
  @mutex.synchronize {
    @count = (@count || 0) + count
  }
end

#flush_emit(step) ⇒ Object 



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# File 'lib/fluent/plugin/flowcounter_simple.rb', line 76

def flush_emit(step)
  count, @count = @count, 0
  if count > 0
    log.info @output_proc.call(count)
  end
end

#process_count(tag, es) ⇒ Object 



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# File 'lib/fluent/plugin/flowcounter_simple.rb', line 96

def process_count(tag, es)
  countup(@indicator_proc.call(es))
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/flowcounter_simple.rb', line 66

def shutdown
  super
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/flowcounter_simple.rb', line 61

def start
  super
  thread_create(:flowcounter_simple_watch, &method(:watch))
end

#watch ⇒ Object 



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# File 'lib/fluent/plugin/flowcounter_simple.rb', line 83

def watch
  # instance variable, and public accessable, for test
  @last_checked = Fluent::EventTime.now
  while thread_current_running?
    sleep 0.1
    if Fluent::EventTime.now - @last_checked >= @tick
      now = Fluent::EventTime.now
      flush_emit(now - @last_checked)
      @last_checked = now
    end
  end
end