Swap

Complexity

Total Complexity

5

Size/Duplication

Total Lines	51
Duplicated Lines	0 %

Importance

Changes	3
Bugs	1	Features	1

3 Methods

Rating	Name	Duplication	Size	Complexity
A	poll()	0	6	1
A	__init__()	0	11	1
A	check()	0	23	3

# -*- coding: utf-8 -*-

__author__ = 'Kenny Freeman'
__email__ = 'kenny.freeman@gmail.com'
__license__ = "ISCL"
__docformat__ = 'reStructuredText'

import os.path

import plumd
import plumd.plugins
from plumd.util import get_file_list


class Swap(plumd.plugins.Reader):
    """Plugin to measure swap metrics from /proc/swap."""
    defaults = {
        'poll.interval': 10,
        'proc_path': '/proc',
    }

    def __init__(self, log, config):
        """Plugin to measure swap metrics from /proc.

        :param log: A logger
        :type log: logging.RootLogger
        :param config: a plumd.config.Conf configuration helper instance.
        :type config: plumd.config.Conf
        """
        super(Swap, self).__init__(log, config)
        config.defaults(Swap.defaults)
        self.proc_file ="{0}/swaps".format(config.get('proc_path'))


    def poll(self):
        """Poll for kernel metrics under /proc.

        :rtype: ResultSet
        """
        return plumd.ResultSet(self.check())


    def check(self):
        """Return swap file usage metrics from proc file swap.

        :rtype: plumd.Result
        """
        result = plumd.Result("swap")
        dat = get_file_list(self.proc_file)
        # header: file, type, size, used, priority
        if len(dat) > 1:
            # remove header line
            dat.popleft()
        for entry in dat:
            #sfname, stype, ssize, sused, sprio = ("", None, 0, 0, 0)
            sfname, stype, ssize, sused, sprio = entry.split()
            sname = os.path.basename(sfname)
            mstr = "{0}.used".format(sname)
            result.add(plumd.Float(mstr, sused))
            mstr = "{0}.size".format(sname)
            result.add(plumd.Float(mstr, ssize))
            sfree = float(ssize) - float(sused)
            mstr = "{0}.free".format(sname)
            result.add(plumd.Float(mstr, sfree))
        return [result]