class Fluent::Plugin::TailInput::TailWatcher::StatWatcher

def initialize(watcher, &callback)
  @watcher = watcher
  @callback = callback
  super(watcher.path)
end

def on_change(prev, cur)
  @callback.call
rescue
  # TODO log?
  @watcher.log.error $!.to_s
  @watcher.log.error_backtrace
end