Class: Stalin::Watcher::UnixPs

Inherits:

Object

• Object
• Stalin::Watcher::UnixPs

Defined in:

lib/stalin/watcher/unix_ps.rb

Instance Method Summary

• #initialize(pid) ⇒ UnixPs constructor

  A new instance of UnixPs.

• #watch ⇒ Integer^?

  Report on memory usage.

Constructor Details

#initialize(pid) ⇒ UnixPs

Returns a new instance of UnixPs.

Parameters:

• pid (Integer) —

  target process ID

Raises:

• (Stalin::Unsupported) —

  if watcher cannot be instantiated on current platform

# File 'lib/stalin/watcher/unix_ps.rb', line 5

def initialize(pid)
  begin
    ps(Process.pid)
  rescue StandardError => e
    raise Stalin::Unsupported, "ps failed: #{e.message}"
  end

  @pid = pid
end

Instance Method Details

#watch ⇒ Integer^?

Report on memory usage.

Returns:

• (Integer, nil) —

  target process’ memory usage in bytes, nil if process not found

# File 'lib/stalin/watcher/unix_ps.rb', line 18

def watch
  ps(@pid)
rescue ArgumentError
  nil
end