Class: LogStash::Outputs::SCACSV

Inherits:
File
  • Object
show all
Defined in:
lib/logstash/outputs/scacsv.rb

Overview

SCACSV - based upon original Logstash CSV output.

Write events to disk in CSV format Write a PI header as the first line in the file Name file per PI convention, based upon first and last timestamps encountered

Instance Method Summary collapse

Instance Method Details

#receive(event) ⇒ Object 



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# File 'lib/logstash/outputs/scacsv.rb', line 121

def receive(event)
  return unless output?(event)

  @logger.debug("in SCACSV receive")

  if (event['SCAWindowMarker']) 
    # just eat the marker - don't output it
    # if we had at least one record output, then close the file and move on 
    if @recordCount >= 1
      closeAndRenameCurrentFile
    end
  else

    # Now see if we need to close file because of a new boundary
    if @closeOnIntervalBoundaries and @recordCount >= 1 and (@currentOutputIntervalStartTime != snapTimestampToInterval(timestampAsEpochSeconds(event),@fileIntervalWidthSeconds))
        closeAndRenameCurrentFile
    end

    @formattedPath = event.sprintf(@path)
    fd = open(@formattedPath)
    @logger.debug("SCACSVreceive - after opening fd=" + fd.to_s)

    if @recordCount == 0
      # output header on first line - note, need a minimum of one record for sensible output
      if @header then 
#         csv_header = @fields.map { |name| name }
        fd.write(@header.to_csv(@csv_options))
      else     
        fd.write(@fields.to_csv(@csv_options))
      end
    end

    csv_values = @fields.map {|name| get_value(name, event)}
    fd.write(csv_values.to_csv(@csv_options))

    flush(fd)
    close_stale_files

    # remember state
    @recordCount = @recordCount + 1
    @lastOutputTime = Time.now

    # capture the earliest - assumption is that records are in order
    if (@recordCount) == 1 
      if !@closeOnIntervalBoundaries
        @startTime = event[@time_field]
      else
        @startTime = snapTimestampToInterval(timestampAsEpochSeconds(event),@fileIntervalWidthSeconds)
      end
    end

    # for every record, update endTime - again, assumption is that records are in order
    if !@closeOnIntervalBoundaries
      @endTime = event[@time_field]
    else
      @endTime = @startTime + @fileIntervalWidthSeconds - 1   # end of interval
    end

#puts("After snapping. timestamp=" + event[@time_field].to_s + " startTime=" + @startTime.to_s + " endTime = " + @endTime.to_s)

    # remember start of boundary for next time
    if @closeOnIntervalBoundaries
       @currentOutputIntervalStartTime = @startTime
    end


    if ((@max_size > 0) and (@recordCount >= max_size))
      # Have enough records, close it out
      closeAndRenameCurrentFile
    end

  end  

end

#register ⇒ Object 



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# File 'lib/logstash/outputs/scacsv.rb', line 56

def register
  super
  @csv_options = Hash[@csv_options.map{|(k,v)|[k.to_sym, v]}]
  
  # variables to hold the start and end times which we'll use to rename the files to
  @startTime   = "missingStartTime"
  @endTime     = "missingEndTime"
  @recordCount = 0

  @lastOutputTime = 0 #data time
  @flushInterval = @flush_interval.to_i

  @timerThread = Thread.new { flushWatchdog(@flush_interval) }

  @currentOutputIntervalStartTime = 0
  @fileIntervalWidthSeconds = 0
  @closeOnIntervalBoundaries = false
  case @file_interval_width.upcase
  when "MINUTE"
    @fileIntervalWidthSeconds = 60
    @closeOnIntervalBoundaries = true
  when "FIVE"
    @fileIntervalWidthSeconds = 300
    @closeOnIntervalBoundaries = true 
  when "FIFTEEN"
    @fileIntervalWidthSeconds = 900
    @closeOnIntervalBoundaries = true 
  when "HOUR"
    @fileIntervalWidthSeconds = 3600
    @closeOnIntervalBoundaries = true 
  when "DAY"
    @fileIntervalWidthSeconds = 86400
    @closeOnIntervalBoundaries = true
  else
    @fileIntervalWidthSeconds = 0 #not used  
    @closeOnIntervalBoundaries = false
  end

  @df = nil 
  if (@time_field_format != "epoch")
    @df = java.text.SimpleDateFormat.new(@time_field_format)
  end


end