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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) 2019 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 Glances standalone session.""" |
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import sys |
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import time |
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from glances.globals import WINDOWS |
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from glances.logger import logger |
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from glances.processes import glances_processes |
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from glances.stats import GlancesStats |
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from glances.outputs.glances_curses import GlancesCursesStandalone |
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from glances.outputs.glances_stdout import GlancesStdout |
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from glances.outputs.glances_stdout_csv import GlancesStdoutCsv |
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from glances.outdated import Outdated |
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from glances.timer import Counter |
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class GlancesStandalone(object): |
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"""This class creates and manages the Glances standalone session.""" |
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def __init__(self, config=None, args=None): |
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self.config = config |
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self.args = args |
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# Quiet mode |
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self._quiet = args.quiet |
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self.refresh_time = args.time |
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# Init stats |
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start_duration = Counter() |
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start_duration.reset() |
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self.stats = GlancesStats(config=config, args=args) |
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logger.debug("Plugins initialisation duration: {} seconds".format(start_duration.get())) |
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# Modules (plugins and exporters) are loaded at this point |
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# Glances can display the list if asked... |
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if args.modules_list: |
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self.display_modules_list() |
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sys.exit(0) |
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# If process extended stats is disabled by user |
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if not args.enable_process_extended: |
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logger.debug("Extended stats for top process are disabled") |
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glances_processes.disable_extended() |
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else: |
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logger.debug("Extended stats for top process are enabled") |
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glances_processes.enable_extended() |
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# Manage optionnal process filter |
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if args.process_filter is not None: |
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glances_processes.process_filter = args.process_filter |
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if (not WINDOWS) and args.no_kernel_threads: |
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# Ignore kernel threads in process list |
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glances_processes.disable_kernel_threads() |
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# Initial system informations update |
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start_duration.reset() |
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self.stats.update() |
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logger.debug("First stats update duration: {} seconds".format(start_duration.get())) |
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if self.quiet: |
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logger.info("Quiet mode is ON, nothing will be displayed") |
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# In quiet mode, nothing is displayed |
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glances_processes.max_processes = 0 |
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elif args.stdout: |
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logger.info("Stdout mode is ON, following stats will be displayed: {}".format(args.stdout)) |
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# Init screen |
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self.screen = GlancesStdout(config=config, args=args) |
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elif args.stdout_csv: |
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logger.info("Stdout CSV mode is ON, following stats will be displayed: {}".format(args.stdout)) |
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# Init screen |
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self.screen = GlancesStdoutCsv(config=config, args=args) |
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else: |
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# Default number of processes to displayed is set to 50 |
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glances_processes.max_processes = 50 |
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# Init screen |
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self.screen = GlancesCursesStandalone(config=config, args=args) |
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# Check the latest Glances version |
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self.outdated = Outdated(config=config, args=args) |
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@property |
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def quiet(self): |
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return self._quiet |
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def display_modules_list(self): |
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"""Display modules list""" |
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print("Plugins list: {}".format( |
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', '.join(sorted(self.stats.getPluginsList(enable=False))))) |
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print("Exporters list: {}".format( |
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', '.join(sorted(self.stats.getExportsList(enable=False))))) |
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def __serve_forever(self): |
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"""Main loop for the CLI. |
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return True if we should continue (no exit key has been pressed) |
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""" |
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# Start a counter used to compute the time needed for |
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# update and export the stats |
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counter = Counter() |
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# Update stats |
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self.stats.update() |
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logger.debug('Stats updated duration: {} seconds'.format(counter.get())) |
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# Export stats |
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counter_export = Counter() |
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self.stats.export(self.stats) |
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logger.debug('Stats exported duration: {} seconds'.format(counter_export.get())) |
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# Patch for issue1326 to avoid < 0 refresh |
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adapted_refresh = self.refresh_time - counter.get() |
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adapted_refresh = adapted_refresh if adapted_refresh > 0 else 0 |
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# Display stats |
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# and wait refresh_time - counter |
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if not self.quiet: |
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# The update function return True if an exit key 'q' or 'ESC' |
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# has been pressed. |
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ret = not self.screen.update(self.stats, duration=adapted_refresh) |
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else: |
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# Nothing is displayed |
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# Break should be done via a signal (CTRL-C) |
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time.sleep(adapted_refresh) |
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ret = True |
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return ret |
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def serve_forever(self): |
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"""Wrapper to the serve_forever function.""" |
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loop = True |
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while loop: |
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loop = self.__serve_forever() |
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self.end() |
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def end(self): |
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"""End of the standalone CLI.""" |
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if not self.quiet: |
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self.screen.end() |
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# Exit from export modules |
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self.stats.end() |
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# Check Glances version versus PyPI one |
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if self.outdated.is_outdated(): |
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print("You are using Glances version {}, however version {} is available.".format( |
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self.outdated.installed_version(), self.outdated.latest_version())) |
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print("You should consider upgrading using: pip install --upgrade glances") |
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nicolargo /
glances
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