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# -*- coding: utf-8 -*- |
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# |
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# This file is part of Glances. |
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# |
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# Copyright (C) 2015 Nicolargo <[email protected]> |
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# |
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# Glances is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU Lesser General Public License as published by |
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# the Free Software Foundation, either version 3 of the License, or |
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# (at your option) any later version. |
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# |
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# Glances is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU Lesser General Public License for more details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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"""Manage the monitor list.""" |
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import re |
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import subprocess |
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from glances.compat import range, u |
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from glances.logger import logger |
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from glances.processes import glances_processes |
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class MonitorList(object): |
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"""This class describes the optional monitored processes list. |
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The monitored list is a list of 'important' processes to monitor. |
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The list (Python list) is composed of items (Python dict). |
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An item is defined (dict keys): |
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* description: Description of the processes (max 16 chars) |
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* regex: regular expression of the processes to monitor |
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* command: (optional) shell command for extended stat |
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* countmin: (optional) minimal number of processes |
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* countmax: (optional) maximum number of processes |
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""" |
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# Maximum number of items in the list |
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__monitor_list_max_size = 10 |
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# The list |
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__monitor_list = [] |
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def __init__(self, config): |
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"""Init the monitoring list from the configuration file, if it exists.""" |
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self.config = config |
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if self.config is not None and self.config.has_section('monitor'): |
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# Process monitoring list |
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logger.debug("Monitor list configuration detected") |
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self.__set_monitor_list('monitor', 'list') |
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else: |
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self.__monitor_list = [] |
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def __set_monitor_list(self, section, key): |
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"""Init the monitored processes list. |
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The list is defined in the Glances configuration file. |
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""" |
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for l in range(1, self.__monitor_list_max_size + 1): |
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value = {} |
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key = "list_" + str(l) + "_" |
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try: |
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description = self.config.get_value(section, key + 'description') |
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regex = self.config.get_value(section, key + 'regex') |
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command = self.config.get_value(section, key + 'command') |
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countmin = self.config.get_value(section, key + 'countmin') |
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countmax = self.config.get_value(section, key + 'countmax') |
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except Exception as e: |
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logger.error("Cannot read monitored list: {0}".format(e)) |
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else: |
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if description is not None and regex is not None: |
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# Build the new item |
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value["description"] = description |
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try: |
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re.compile(regex) |
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except Exception: |
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continue |
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else: |
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value["regex"] = regex |
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value["command"] = command |
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value["countmin"] = countmin |
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value["countmax"] = countmax |
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value["count"] = None |
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value["result"] = None |
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# Add the item to the list |
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self.__monitor_list.append(value) |
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def __str__(self): |
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return str(self.__monitor_list) |
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def __repr__(self): |
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return self.__monitor_list |
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def __getitem__(self, item): |
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return self.__monitor_list[item] |
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def __len__(self): |
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return len(self.__monitor_list) |
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def __get__(self, item, key): |
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"""Meta function to return key value of item. |
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Return None if not defined or item > len(list) |
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""" |
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if item < len(self.__monitor_list): |
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try: |
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return self.__monitor_list[item][key] |
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except Exception: |
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return None |
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else: |
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return None |
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def update(self): |
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"""Update the command result attributed.""" |
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# Only continue if monitor list is not empty |
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if len(self.__monitor_list) == 0: |
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return self.__monitor_list |
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# Search monitored processes by a regular expression |
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processlist = [p for p in glances_processes.getalllist()] |
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# Iter upon the monitored list |
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for i in range(len(self.get())): |
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monitoredlist = [p for p in processlist for c in p['cmdline'] if re.search(self.regex(i), c) is not None] |
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self.__monitor_list[i]['count'] = len(monitoredlist) |
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# Always get processes CPU and MEM |
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self.__monitor_list[i]['default_result'] = 'CPU: {0:.1f}% | MEM: {1:.1f}%'.format( |
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sum([p['cpu_percent'] for p in monitoredlist]), |
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sum([p['memory_percent'] for p in monitoredlist])) |
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if self.command(i) is not None: |
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# Execute the user command line |
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try: |
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self.__monitor_list[i]['result'] = subprocess.check_output(self.command(i), |
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shell=True) |
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except subprocess.CalledProcessError: |
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self.__monitor_list[i]['result'] = 'Error: ' + self.command(i) |
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except Exception: |
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self.__monitor_list[i]['result'] = 'Cannot execute command' |
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# Only save the first line |
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try: |
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self.__monitor_list[i]['result'] = u(self.__monitor_list[i]['result']).split('\n')[0] |
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except: |
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self.__monitor_list[i]['result'] = '' |
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if self.command(i) is None or self.__monitor_list[i]['result'] == '': |
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# If there is no command specified in the conf file |
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# then display CPU and MEM % |
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self.__monitor_list[i]['result'] = self.__monitor_list[i]['default_result'] |
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return self.__monitor_list |
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def get(self): |
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"""Return the monitored list (list of dict).""" |
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return self.__monitor_list |
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def set(self, newlist): |
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"""Set the monitored list (list of dict).""" |
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self.__monitor_list = newlist |
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def getAll(self): |
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# Deprecated: use get() |
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return self.get() |
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def setAll(self, newlist): |
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# Deprecated: use set() |
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self.set(newlist) |
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def description(self, item): |
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"""Return the description of the item number (item).""" |
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return self.__get__(item, "description") |
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def regex(self, item): |
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"""Return the regular expression of the item number (item).""" |
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return self.__get__(item, "regex") |
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def command(self, item): |
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"""Return the stat command of the item number (item).""" |
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return self.__get__(item, "command") |
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def result(self, item): |
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"""Return the reult command of the item number (item).""" |
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return self.__get__(item, "result") |
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def countmin(self, item): |
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"""Return the minimum number of processes of the item number (item).""" |
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return self.__get__(item, "countmin") |
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def countmax(self, item): |
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"""Return the maximum number of processes of the item number (item).""" |
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return self.__get__(item, "countmax") |
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