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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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# SPDX-FileCopyrightText: 2022 Nicolas Hennion <[email protected]> |
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# |
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# SPDX-License-Identifier: LGPL-3.0-only |
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# |
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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.logger import logger |
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from glances.globals import WINDOWS |
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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_json import GlancesStdoutJson |
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from glances.outputs.glances_stdout_csv import GlancesStdoutCsv |
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from glances.outputs.glances_stdout_issue import GlancesStdoutIssue |
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from glances.outputs.glances_stdout_apidoc import GlancesStdoutApiDoc |
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from glances.outdated import Outdated |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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# The args is needed to get the selected process in the process list (Curses mode) |
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glances_processes.set_args(args) |
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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 optional process filter |
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if args.process_filter is not None: |
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logger.info("Process filter is set to: {}".format(args.process_filter)) |
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glances_processes.process_filter = args.process_filter |
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if (args.export or args.stdout) and args.export_process_filter is not None: |
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logger.info("Export process filter is set to: {}".format(args.export_process_filter)) |
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glances_processes.export_process_filter = args.export_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 information 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_issue: |
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logger.info("Issue mode is ON") |
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# Init screen |
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self.screen = GlancesStdoutIssue(config=config, args=args) |
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elif args.stdout_apidoc: |
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logger.info("Fields descriptions mode is ON") |
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# Init screen |
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self.screen = GlancesStdoutApiDoc(config=config, args=args) |
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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_json: |
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logger.info("Stdout JSON mode is ON, following stats will be displayed: {}".format(args.stdout_json)) |
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# Init screen |
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self.screen = GlancesStdoutJson(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_csv)) |
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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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# If an error occur during the screen init, continue if export option is set |
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# It is done in the screen.init function |
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self._quiet = args.quiet |
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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(', '.join(sorted(self.stats.getPluginsList(enable=False))))) |
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print("Exporters list: {}".format(', '.join(sorted(self.stats.getExportsList(enable=False))))) |
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def serve_issue(self): |
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"""Special mode for the --issue option |
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Update is done in the screen.update function |
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""" |
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ret = not self.screen.update(self.stats) |
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self.end() |
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return ret |
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def __serve_once(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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# Update stats |
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# Start a counter used to compute the time needed |
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counter = Counter() |
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self.stats.update() |
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logger.debug('Stats updated duration: {} seconds'.format(counter.get())) |
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# Patch for issue1326 to avoid < 0 refresh |
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adapted_refresh = (self.refresh_time - counter.get()) if (self.refresh_time - counter.get()) > 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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counter_display = Counter() |
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ret = not self.screen.update(self.stats, duration=adapted_refresh) |
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logger.debug('Stats display duration: {} seconds'.format(counter_display.get() - 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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# Export stats |
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# Start a counter used to compute the time needed |
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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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return ret |
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def serve_n(self, n=1): |
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"""Serve n time.""" |
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for _ in range(n): |
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if not self.__serve_once(): |
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break |
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# self.end() |
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def serve_forever(self): |
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"""Wrapper to the serve_forever function.""" |
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if self.args.stop_after: |
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self.serve_n(self.args.stop_after) |
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else: |
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while self.__serve_once(): |
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pass |
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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( |
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"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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) |
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) |
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print("You should consider upgrading using: pip install --upgrade glances") |
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print("Disable this warning temporarily using: glances --disable-check-update") |
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print( |
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"To disable it permanently, refer config reference at " |
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"https://glances.readthedocs.io/en/latest/config.html#syntax" |
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) |
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nicolargo /
glances
