Class: Resque::Top::CLI

Inherits:
Object
  • Object
show all
Defined in:
lib/resque-top/cli.rb

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ CLI

Returns a new instance of CLI.



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# File 'lib/resque-top/cli.rb', line 5

def initialize(options)
  if options[:redis]
    Resque.redis = options[:redis]
  end
  if options[:namespace]
    Resque.redis.namespace = options[:namespace]
  end

  @width, @height = detect_terminal_size
end

Instance Method Details

#clear ⇒ Object 



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# File 'lib/resque-top/cli.rb', line 100

def clear
  print "\033[2J"
end

#command_exists?(command) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/resque-top/cli.rb', line 104

def command_exists?(command)
  ENV['PATH'].split(File::PATH_SEPARATOR).any? { |d| File.exists? File.join(d, command) }
end

#detect_terminal_size ⇒ Object

github.com/cldwalker/hirb/blob/master/lib/hirb/util.rb#L61-71



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# File 'lib/resque-top/cli.rb', line 109

def detect_terminal_size
  if (ENV['COLUMNS'] =~ /^\d+$/) && (ENV['LINES'] =~ /^\d+$/)
    [ENV['COLUMNS'].to_i, ENV['LINES'].to_i]
  elsif (RUBY_PLATFORM =~ /java/ || (!STDIN.tty? && ENV['TERM'])) && command_exists?('tput')
    [`tput cols`.to_i, `tput lines`.to_i]
  elsif STDIN.tty? && command_exists?('stty')
    `stty size`.scan(/\d+/).map {  |s| s.to_i }.reverse
  else
    nil
  end
rescue Exception => e
  nil
end

#display ⇒ Object 



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# File 'lib/resque-top/cli.rb', line 55

def display
  out = []
  out << "Resque connected to: #{Resque.redis_id} (#{Resque.redis.namespace})"
  out << ""

  out << "Queues: "
  rows = []
  Resque.queues.each do |queue|
    rows << [ queue, Resque.size(queue) ]
  end
  rows << [ "failed", Resque::Failure.count ]
  out.push *(tabular(rows))

  out << ""

  out << "Workers:"
  workers = Resque.workers.sort_by { |w| w.to_s }

  workers.each do |worker|
    line = ''
    host, pid, queues = worker.to_s.split(':')
    cols = []
    cols << [ "#{host}:#{pid}", queues ]
    data = worker.processing || {}
    if data['queue']
      cols[-1].push "#{data['payload']['class']} (#{data['run_at']})"
    else
      cols[-1].push "Waiting for a job...."
    end
    out.push *(tabular(cols))
  end

  if workers.empty?
    out << "  (There are no registered workers)"
  end

  (@height - out.size - 2).times do out << "" end
  out << "(Ctrl-c to quit.)"

  right_float(out[0], Time.now.strftime('%H:%M:%S'))

  clear
  puts out.join("\n")
end

#justify(longest, string) ⇒ Object 



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# File 'lib/resque-top/cli.rb', line 47

def justify(longest, string)
  if string.is_a?(Integer)
    string.to_s.rjust(longest)
  else
    string.ljust(longest)
  end
end

#right_float(target, str) ⇒ Object 



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# File 'lib/resque-top/cli.rb', line 24

def right_float(target, str)
  target << (' ' * (@width - target.length - str.length)) + str
end

#run ⇒ Object 



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# File 'lib/resque-top/cli.rb', line 16

def run
  loop do
    display
    sleep 1
  end
rescue Interrupt
end

#tabular(rows, indent = 2, separator = "|") ⇒ Object 



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# File 'lib/resque-top/cli.rb', line 28

def tabular(rows, indent=2, separator="|")
  if rows.empty?
    nil
  else
    longest = [0] * rows[0].count
    rows.each do |cols|
      cols.each_with_index do |value, i|
        longest[i] = [ longest[i], value.to_s.length ].max
      end
    end
    rows.collect do |row|
      longest.each_with_index do |value, i|
        row[i] = justify(value, row[i])
      end
      (" " * indent) + row.join(" | ")
    end
  end
end