Class: RailsStat

Inherits:
Object
  • Object
show all
Defined in:
lib/analyzer_tools/rails_stat.rb

Overview

RailsStat displays a the current requests and lines logged per second. Default interval is 10 seconds.

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(io, interval, offset = 0) ⇒ RailsStat

Creates a new RailsStat that will listen on io and print every interval seconds. offset is only used for multi-file support.



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# File 'lib/analyzer_tools/rails_stat.rb', line 64

def initialize(io, interval, offset = 0)
  @io = io
  @io_path = File.basename io.path rescue 'unknown'
  @interval = interval.to_f
  @offset = offset

  @mutex = Mutex.new
  @status = ''
  @last_len = 0
  @lines = 0
  @count = 0
  @thread = nil
end

Class Attribute Details

.lines ⇒ Object (readonly)

Returns the value of attribute lines.



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# File 'lib/analyzer_tools/rails_stat.rb', line 11

def lines
  @lines
end

Instance Attribute Details

#status ⇒ Object (readonly)

Current status line



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# File 'lib/analyzer_tools/rails_stat.rb', line 58

def status
  @status
end

#thread ⇒ Object (readonly)

The log reading thread



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# File 'lib/analyzer_tools/rails_stat.rb', line 53

def thread
  @thread
end

Class Method Details

.start(*args) ⇒ Object

RailsStat.start ‘online-43things.log’, ‘online-43people.log’, 10

Starts a new RailsStat for filenames that prints every interval seconds.

Stats for multiple log files requires curses.



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# File 'lib/analyzer_tools/rails_stat.rb', line 22

def self.start(*args)
  interval = 10
  interval = Float(args.pop) if Float(args.last) rescue nil

  stats = []

  if args.length > 1 and not defined? Curses then
    $stderr.puts "Multiple logfile support requires curses"
    exit 1
  end

  if defined? Curses then
    Curses.init_screen
    Curses.clear
    Curses.addstr "Collecting data...\n"
    Curses.refresh
    @lines = []
  end

  args.each_with_index do |filename, offset|
    stat = self.new File.open(filename), interval, offset
    stat.start
    stats << stat
  end

  stats.each { |stat| stat.thread.join }
end

Instance Method Details



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# File 'lib/analyzer_tools/rails_stat.rb', line 90

def print
  if defined? Curses then
    Curses.setpos @offset, 0
    Curses.addstr ' ' * @last_len
    Curses.setpos @offset, 0
    Curses.addstr "#{@io_path}\t#{@status}"
    Curses.refresh
  else
    print "\r"
    print ' ' * @last_len
    print "\r"
    print @status
    $stdout.flush
  end
end

#start ⇒ Object

Starts the RailsStat running. This method never returns.



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# File 'lib/analyzer_tools/rails_stat.rb', line 81

def start
  trap 'INT' do
    Curses.close_screen if defined? Curses
    exit
  end
  start_printer
  read_log
end