Class: OsCtl::Cli::Ps::Main

Inherits:
Command
  • Object
show all
Defined in:
lib/osctl/cli/ps/main.rb

Defined Under Namespace

Classes: SlowOsProcess

Constant Summary collapse

READ_TIMEOUT = 
1

Instance Method Summary collapse

Methods inherited from Command

#cli_opt, #format_output, #osctld_call, #osctld_fmt, #osctld_open, #osctld_resp, run

Instance Method Details

#get_process_list(ctids, filters) ⇒ Object (protected) 



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# File 'lib/osctl/cli/ps/main.rb', line 104

def get_process_list(ctids, filters)
   = TTY::Spinner.new('[:spinner] :title', clear: true)
  .update(title: 'Listing processes...')
  .auto_spin

  list_queue = OsCtl::Lib::Queue.new
  list_thread = Thread.new { list_processes(list_queue, ctids, filters) }
  update_queue = OsCtl::Lib::Queue.new
  update_thread = Thread.new { update_loop(update_queue) }
  last_os_proc = nil
  last_time = nil
  slow_os_procs = []
  @update_count = false
  total = 0
  error = false
  ret = nil

  loop do
    v = list_queue.pop(timeout: READ_TIMEOUT)

    if v.is_a?(Array)
      ret = v
      ret << slow_os_procs
      break
    end

    os_proc = v

    if os_proc.nil? && !error
      msg =
        if last_os_proc.nil?
          'Taking long to list /proc entries'
        else
          format('Taking long to process pid %d', last_os_proc.pid)
        end

      set_title(, msg)

      if last_os_proc
        slow_os_procs << SlowOsProcess.new(last_os_proc, 0)
        last_time = Time.now - READ_TIMEOUT
      end

      error = true
      next
    end

    if os_proc && last_time
      slow_os_procs.last.duration = Time.now - last_time
      last_time = nil
    end

    total += 1
    last_os_proc = os_proc

    if os_proc && error
      set_title(, format('Listing processes... %8d', total))
      error = false
    elsif os_proc
      set_title(, format('Listing processes... %8d', total))
      @update_count = false
    end
  end

  if last_time
    slow_os_procs.last.duration = Time.now - last_time
    last_time = nil
  end

  update_queue << :stop
  list_thread.join
  update_thread.join
  .stop
  ret
end

#list_processes(queue, ctids, filters) ⇒ Object (protected) 



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# File 'lib/osctl/cli/ps/main.rb', line 184

def list_processes(queue, ctids, filters)
  pools = {}
  pl = OsCtl::Lib::ProcessList.new(parse_stat: false, parse_status: false) do |p|
    # Signal which pid we're on
    queue << p

    # Filter processes
    pool, id = p.ct_id

    if !ctids.empty? \
       && !(pool.nil? && ctids[:host]) \
       && !(pool && (ctids.has_key?(id) || ctids.has_key?("#{pool}:#{id}")))
      next(false)
    end

    # Parse process files
    p.parse
    p.cmdline

    next(false) if filters.detect { |f| !f.match?(p) }

    pools[pool] = true if pool
    true
  end

  queue << [pl, pools]
end

#print_slow_processes(slow_os_procs) ⇒ Object (protected) 



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# File 'lib/osctl/cli/ps/main.rb', line 82

def print_slow_processes(slow_os_procs)
  warn "\nSlow processes:"
  slow_os_procs.sort do |a, b|
    b.duration <=> a.duration
  end.each do |slow_proc|
    begin
      pool, id = slow_proc.os_process.ct_id
      ctid = pool.nil? ? '[host]' : "#{pool}:#{id}"
    rescue OsCtl::Lib::Exceptions::OsProcessNotFound
      ctid = '[unknown]'
    end

    warn(format(
           '%16s: %10d %-18s %.2fs',
           ctid,
           slow_proc.os_process.pid,
           slow_proc.os_process.name,
           slow_proc.duration
         ))
  end
end

#run ⇒ Object 



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# File 'lib/osctl/cli/ps/main.rb', line 10

def run
  param_selector = OsCtl::Lib::Cli::ParameterSelector.new(
    all_params: Ps::Columns::COLS
  )

  if opts[:list]
    puts param_selector
    return
  end

  require_args!(optional: %w[id], strict: false)

  filters = opts[:parameter].map { |v| Ps::Filter.new(v) }

  ctids = {}

  args.each do |arg|
    if arg == '-'
      ctids[:host] = true
    elsif arg.index(':')
      pool, id = arg.split(':')
      ctids["#{pool}:#{id}"] = true
    else
      pool = gopts[:pool]
      id = arg

      if pool
        ctids["#{pool}:#{id}"] = true
      else
        ctids[id] = true
      end
    end
  end

  pl, pools, slow_os_procs = get_process_list(ctids, filters)

  default_cols =
    if ctids.size == 1
      Ps::Columns::DEFAULT_ONE_CT
    elsif pools.size == 1
      Ps::Columns::DEFAULT_ONE_POOL
    else
      Ps::Columns::DEFAULT_MULTIPLE_POOLS
    end

  out_cols, out_data = Ps::Columns.generate(
    pl,
    param_selector.parse_option(opts[:output], default_params: default_cols),
    gopts[:parsable]
  )

  OsCtl::Lib::Cli::OutputFormatter.print(
    out_data,
    cols: out_cols,
    layout: :columns,
    header: opts['hide-header'] ? false : true,
    sort: opts[:sort] && param_selector.parse_option(opts[:sort])
  )

  if pl.size > 1
    warn "#{pl.size} processes"
  elsif pl.size == 1
    warn "#{pl.size} process"
  else
    warn 'No processes found'
  end

  print_slow_processes(slow_os_procs) if slow_os_procs.any?
end

#set_title(spinner, str) ⇒ Object (protected) 



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# File 'lib/osctl/cli/ps/main.rb', line 180

def set_title(, str)
  .tokens[:title] = format('%-40s', str)
end

#update_loop(queue) ⇒ Object (protected) 



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# File 'lib/osctl/cli/ps/main.rb', line 212

def update_loop(queue)
  loop do
    return if queue.pop(timeout: 0.2) == :stop

    @update_count = true
  end
end