Class: Fluent::FilterAggregate

Inherits:
Filter
  • Object
show all
Defined in:
lib/fluent/plugin/filter_aggregate.rb

Defined Under Namespace

Classes: TimerWatcher

Constant Summary collapse

VALID_AGGREGATIONS = 
['sum','min','max','mean','median','variance','standard_deviation']

Instance Method Summary collapse

Constructor Details

#initialize ⇒ FilterAggregate 



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# File 'lib/fluent/plugin/filter_aggregate.rb', line 29

def initialize
  super
end

Instance Method Details

#aggregate_events ⇒ Object 



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# File 'lib/fluent/plugin/filter_aggregate.rb', line 147

def aggregate_events

  #log.trace @aggregator
  @aggregator_mutex.synchronize do
  data_aggregated = @data_operations.aggregate_events
    data_aggregated.each{|s_interval,data_aggregated|
      #log.trace data_aggregated
      es = MultiEventStream.new
      data_aggregated.each {|item|
         es.add(item['time'], item)
      }
      unless es.empty?
        tag="#{@aggregate_event_tag}.#{s_interval}"
        router.emit_stream(tag, es)
      end
    } if data_aggregated
  end

#rescue Exception => e
#  $log.error e
end

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/filter_aggregate.rb', line 33

def configure(conf)
  super

  require 'dataoperations-aggregate'

  @intervals = @interval unless @interval.nil?
  @hash_time_format = "%Y-%m-%dT%H"
  @interval_seconds = 3600
  @intervals[1..-1].each{|interval|
    case interval
    when 1,5,10,20,30,60,120,180,240,300,600,900,1200,1800,3600
    if ! (interval % @intervals[0]) == 0
        raise Fluent::ConfigError, "interval must be multiple of default_aggregate_interval(#{@default_aggregate_interval}s)"
    end
    else
      raise Fluent::ConfigError, "interval must set to 1s,5s,10s,20s,30s,1m,5m,10m"
    end
  }

  @group_field_names = @group_fields
  @aggregate_field_names = @aggregate_fields
  @aggregation_names = @aggregations
  @aggregator_name = "#{Socket.gethostname}"
  @aggregator_name = "#{@aggregator_name}-#{@aggregator_suffix_name}" unless @aggregator_suffix_name.nil?

  @aggregation_names.each {|operation|
    if ! VALID_AGGREGATIONS.include?(operation)
      raise Fluent::ConfigError, "aggregations must set any combination of sum,min,max,mean,median,variance,standard_deviation "
    end
  }

  @aggregator = {}
  if load_temporarystatus_file_enabled && ! @temporary_status_file_path.nil? && File.exist?(@temporary_status_file_path) && file_status = File.open(@temporary_status_file_path,'r')
    begin
      @aggregator=eval(file_status.read)
      file_status.close
      File.delete(@temporary_status_file_path)
      log.info "Temporary information loaded from temporary_status_file_path:#{@temporary_status_file_path} before startup"
    rescue Exception => e
      log.warn "Failed to load temporary_status_file_path:#{@temporary_status_file_path}"
      log.warn e.message
      log.warn e.backtrace.inspect
    end
  end

  @aggregator = {} unless @aggregator.is_a?(Hash)

  log.warn "temporary_status_file_path is empty, is recomended using to avoid lost statistic information beetween restarts." if @temporary_status_file_path.nil?
  @aggregator_mutex = Mutex.new
  @processing_mode_type=@processing_mode=='batch' ? :batch : :online
  @data_operations = DataOperations::Aggregate.new(aggregator: @aggregator,
                      time_format: @time_format,
                      time_field: @time_field,
                      output_time_format: @output_time_format,
                      intervals: @intervals,
                      flush_interval: @flush_interval,
                      keep_interval: @keep_interval,
                      field_no_data_value: @field_no_data_value,
                      processing_mode: @processing_mode_type,
                      log: log,
                      aggregator_name: @aggregator_name,
                      aggregation_names: @aggregation_names,
                      group_field_names: @group_field_names,
                      aggregate_field_names: @aggregate_field_names)
end

#filter(tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/filter_aggregate.rb', line 99

def filter(tag, time, record)
  result = nil
  begin
    result = record unless ! emit_original_message

    @data_operations.add_events(result)
    result
  rescue => e
    log.warn "failed to filter events", :error_class => e.class, :error => e.message
    log.warn_backtrace
  end
  result
end

#run ⇒ Object 



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# File 'lib/fluent/plugin/filter_aggregate.rb', line 121

def run
  @loop.run
rescue
  log.error "unexpected error", :error=>$!.to_s
  log.error_backtrace
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/filter_aggregate.rb', line 128

def shutdown
  @loop.stop
  @thread.join

  if load_temporarystatus_file_enabled && ! @temporary_status_file_path.nil? && file_status = File.open(@temporary_status_file_path,'w')
    begin
      file_status.write @aggregator
      file_status.close
      log.info "Temporary information stored in temporary_status_file_path:#{@temporary_status_file_path} before shutdown"
    rescue Exception => e
      log.warn "Failed to load temporary_status_file_path:#{@temporary_status_file_path}"
      log.warn e.message
      log.warn e.backtrace.inspect
    end
  end

  super
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/filter_aggregate.rb', line 113

def start
  super
  @loop = Coolio::Loop.new
  tw = TimerWatcher.new(@flush_interval, true, @log, &method(:aggregate_events))
  tw.attach(@loop)
  @thread = Thread.new(&method(:run))
end