#!/usr/bin/python
# -*- encoding: utf-8; py-indent-offset: 4 -*-
# ------------------------------------------------------------------+
# |             ____ _               _        __  __ _  __           |
# |            / ___| |__   ___  ___| | __   |  \/  | |/ /           |
# |           | |   | '_ \ / _ \/ __| |/ /   | |\/| | ' /            |
# |           | |___| | | |  __/ (__|   <    | |  | | . \            |
# |            \____|_| |_|\___|\___|_|\_\___|_|  |_|_|\_\           |
# |                                                                  |
# | Copyright Mathias Kettner 2014             mk@mathias-kettner.de |
# ------------------------------------------------------------------+
#
# This file is part of Check_MK.
# The official homepage is at http://mathias-kettner.de/check_mk.
#
# check_mk is free software;  you can redistribute it and/or modify it
# under the  terms of the  GNU General Public License  as published by
# the Free Software Foundation in version 2.  check_mk is  distributed
# in the hope that it will be useful, but WITHOUT ANY WARRANTY;  with-
# out even the implied warranty of  MERCHANTABILITY  or  FITNESS FOR A
# PARTICULAR PURPOSE. See the  GNU General Public License for more de-
# tails. You should have  received  a copy of the  GNU  General Public
# License along with GNU Make; see the file  COPYING.  If  not,  write
# to the Free Software Foundation, Inc., 51 Franklin St,  Fifth Floor,
# Boston, MA 02110-1301 USA.

# <<<mongodb_mem>>>
# resident 856
# supported True
# virtual 6100
# mappedWithJournal 5374
# mapped 2687
# bits 64
# note fields vary by platform
# page_faults 86
# heap_usage_bytes 65501032


def parse_mongodb_mem(info):
    parsed = {}
    for line in info:
        key, value = line[0], " ".join(line[1:])
        try:
            parsed[key] = int(value)
        except ValueError:
            parsed[key] = value
    return parsed


def check_mongodb_mem(_no_item, params, parsed):

    for key in ("resident", "virtual", "mapped"):
        if key in parsed:  # 'mapped' only for the MMAPv1 storage engine, deprecated with 4x
            value_bytes = parsed[key] * 1024**2
            levels = params.get("%s_levels" % key, (None, None))
            yield check_levels_backport(
                value_bytes,
                "process_%s_size" % key,
                levels,
                human_readable_func=get_bytes_human_readable,
                infoname="%s usage" % key.title())

    # MongoDB doc: If virtual value is significantly larger than mapped (e.g. 3 or more times),
    #              this may indicate a memory leak.
    if parsed.get("mapped"):  # present, non-zero
        virt_mapped_factor = parsed["virtual"] / float(parsed["mapped"])
        if virt_mapped_factor >= 3:
            textfmt = "Virtual size is %.1f times the mapped size (possible memory leak)"
            yield 1, textfmt % virt_mapped_factor


check_info['mongodb_mem'] = {
    "parse_function": parse_mongodb_mem,
    "inventory_function": discover_single,
    "check_function": check_mongodb_mem,
    "service_description": "Memory used MongoDB",
    "group": "mongodb_mem",
    "has_perfdata": True,
    "includes": ["backport.include"]
}
