Class: CSGOLytics::LogReader

Inherits:
Object
  • Object
show all
Defined in:
lib/csgolytics/log_reader.rb

Constant Summary collapse

POLL_INTERVAL = 
1

Instance Method Summary collapse

Constructor Details

#initialize(logdir) ⇒ LogReader

Returns a new instance of LogReader.



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# File 'lib/csgolytics/log_reader.rb', line 13

def initialize(logdir)
  @logdir = logdir
  @callbacks = []
end

Instance Method Details

#on_logline(&cb) ⇒ Object 



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# File 'lib/csgolytics/log_reader.rb', line 18

def on_logline(&cb)
  @callbacks << cb
end

#start ⇒ Object 



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# File 'lib/csgolytics/log_reader.rb', line 22

def start
  # tail the logfiles
  loop do
    begin
      # list all logfiles
      @logfiles = {}
      @logfiles_completed = {}
      Dir.entries(@logdir).each do |f|
        if f.end_with?(".log")
          @logfiles[f] = true
        end

        if f =~ /^\.(.*\.log)\.csgolytics_complete$/
          @logfiles_completed[$1] = true
        end
      end

      @logfiles = (@logfiles.keys - @logfiles_completed.keys).sort

      # read each logfile from the last offset and upload new lines
      @logfiles.each_with_index do |fname, logfile_index|
        fpath = File.join(@logdir, fname)
        offset_file_path = File.join(@logdir, ".#{fname}.csgolytics_offset")
        offset = 0
        if File.exists?(offset_file_path)
          offset = IO.read(offset_file_path).to_i
        end

        puts "Reading #{fpath} from #{offset}"

        f = File.open(fpath)
        f.seek(offset)
        while l = (f.readline rescue nil)
          l.encode!('UTF-8', 'UTF-8', :invalid => :replace)
          l.chomp!

          @callbacks.each do |cb|
            cb[l]
          end

          File.write(offset_file_path + "~", f.tell)
          FileUtils.mv(offset_file_path + "~", offset_file_path)
        end

        if logfile_index < @logfiles.length - 1
          FileUtils.touch(File.join(@logdir, ".#{fname}.csgolytics_complete"))
        end
      end
    rescue Exception => e
      $stderr.puts "ERROR: #{e.to_s}"
      $stderr.puts e.backtrace
    end

    sleep POLL_INTERVAL
  end
end