1 | # -*- coding: utf-8 -*- |
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2 | # |
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3 | # This file is part of Glances. |
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4 | # |
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5 | # Copyright (C) 2019 Nicolargo <[email protected]> |
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6 | # |
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7 | # Glances is free software; you can redistribute it and/or modify |
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8 | # it under the terms of the GNU Lesser General Public License as published by |
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9 | # the Free Software Foundation, either version 3 of the License, or |
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10 | # (at your option) any later version. |
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11 | # |
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12 | # Glances is distributed in the hope that it will be useful, |
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13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | # GNU Lesser General Public License for more details. |
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16 | # |
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17 | # You should have received a copy of the GNU Lesser General Public License |
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18 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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19 | |||
20 | """Manage the Glances standalone session.""" |
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21 | |||
22 | import sys |
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23 | import time |
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24 | |||
25 | from glances.globals import WINDOWS |
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26 | from glances.logger import logger |
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27 | from glances.processes import glances_processes |
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28 | from glances.stats import GlancesStats |
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29 | from glances.outputs.glances_curses import GlancesCursesStandalone |
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30 | from glances.outputs.glances_stdout import GlancesStdout |
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31 | from glances.outputs.glances_stdout_csv import GlancesStdoutCsv |
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32 | from glances.outdated import Outdated |
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33 | from glances.timer import Counter |
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34 | |||
35 | |||
36 | class GlancesStandalone(object): |
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37 | |||
38 | """This class creates and manages the Glances standalone session.""" |
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39 | |||
40 | def __init__(self, config=None, args=None): |
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41 | self.config = config |
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42 | self.args = args |
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43 | |||
44 | # Quiet mode |
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45 | self._quiet = args.quiet |
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46 | self.refresh_time = args.time |
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47 | |||
48 | # Init stats |
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49 | start_duration = Counter() |
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50 | start_duration.reset() |
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51 | self.stats = GlancesStats(config=config, args=args) |
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52 | logger.debug("Plugins initialisation duration: {} seconds".format(start_duration.get())) |
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53 | |||
54 | # Modules (plugins and exporters) are loaded at this point |
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55 | # Glances can display the list if asked... |
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56 | if args.modules_list: |
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57 | self.display_modules_list() |
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58 | sys.exit(0) |
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59 | |||
60 | # If process extended stats is disabled by user |
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61 | if not args.enable_process_extended: |
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62 | logger.debug("Extended stats for top process are disabled") |
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63 | glances_processes.disable_extended() |
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64 | else: |
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65 | logger.debug("Extended stats for top process are enabled") |
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66 | glances_processes.enable_extended() |
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67 | |||
68 | # Manage optionnal process filter |
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69 | if args.process_filter is not None: |
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70 | glances_processes.process_filter = args.process_filter |
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71 | |||
72 | if (not WINDOWS) and args.no_kernel_threads: |
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73 | # Ignore kernel threads in process list |
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74 | glances_processes.disable_kernel_threads() |
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75 | |||
76 | # Initial system informations update |
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77 | start_duration.reset() |
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78 | self.stats.update() |
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79 | logger.debug("First stats update duration: {} seconds".format(start_duration.get())) |
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80 | |||
81 | if self.quiet: |
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82 | logger.info("Quiet mode is ON, nothing will be displayed") |
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83 | # In quiet mode, nothing is displayed |
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84 | glances_processes.max_processes = 0 |
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85 | elif args.stdout: |
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86 | logger.info("Stdout mode is ON, following stats will be displayed: {}".format(args.stdout)) |
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87 | # Init screen |
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88 | self.screen = GlancesStdout(config=config, args=args) |
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89 | elif args.stdout_csv: |
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90 | logger.info("Stdout CSV mode is ON, following stats will be displayed: {}".format(args.stdout)) |
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91 | # Init screen |
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92 | self.screen = GlancesStdoutCsv(config=config, args=args) |
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93 | else: |
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94 | # Default number of processes to displayed is set to 50 |
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95 | glances_processes.max_processes = 50 |
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96 | |||
97 | # Init screen |
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98 | self.screen = GlancesCursesStandalone(config=config, args=args) |
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99 | |||
100 | # Check the latest Glances version |
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101 | self.outdated = Outdated(config=config, args=args) |
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102 | |||
103 | @property |
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104 | def quiet(self): |
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105 | return self._quiet |
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106 | |||
107 | def display_modules_list(self): |
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108 | """Display modules list""" |
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109 | print("Plugins list: {}".format( |
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110 | ', '.join(sorted(self.stats.getPluginsList(enable=False))))) |
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111 | print("Exporters list: {}".format( |
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112 | ', '.join(sorted(self.stats.getExportsList(enable=False))))) |
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113 | |||
114 | def __serve_forever(self): |
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115 | """Main loop for the CLI. |
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116 | |||
117 | return True if we should continue (no exit key has been pressed) |
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118 | """ |
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119 | # Start a counter used to compute the time needed for |
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120 | # update and export the stats |
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121 | counter = Counter() |
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122 | |||
123 | # Update stats |
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124 | self.stats.update() |
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125 | logger.debug('Stats updated duration: {} seconds'.format(counter.get())) |
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126 | |||
127 | # Export stats |
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128 | counter_export = Counter() |
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129 | self.stats.export(self.stats) |
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130 | logger.debug('Stats exported duration: {} seconds'.format(counter_export.get())) |
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131 | |||
132 | # Patch for issue1326 to avoid < 0 refresh |
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133 | adapted_refresh = self.refresh_time - counter.get() |
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134 | adapted_refresh = adapted_refresh if adapted_refresh > 0 else 0 |
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135 | |||
136 | # Display stats |
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137 | # and wait refresh_time - counter |
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138 | if not self.quiet: |
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139 | # The update function return True if an exit key 'q' or 'ESC' |
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140 | # has been pressed. |
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141 | ret = not self.screen.update(self.stats, duration=adapted_refresh) |
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142 | else: |
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143 | # Nothing is displayed |
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144 | # Break should be done via a signal (CTRL-C) |
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145 | time.sleep(adapted_refresh) |
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146 | ret = True |
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147 | |||
148 | return ret |
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149 | |||
150 | def serve_forever(self): |
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151 | """Wrapper to the serve_forever function.""" |
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152 | loop = True |
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153 | while loop: |
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154 | loop = self.__serve_forever() |
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155 | self.end() |
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156 | |||
157 | def end(self): |
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158 | """End of the standalone CLI.""" |
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159 | if not self.quiet: |
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160 | self.screen.end() |
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161 | |||
162 | # Exit from export modules |
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163 | self.stats.end() |
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164 | |||
165 | # Check Glances version versus PyPI one |
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166 | if self.outdated.is_outdated(): |
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167 | print("You are using Glances version {}, however version {} is available.".format( |
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168 | self.outdated.installed_version(), self.outdated.latest_version())) |
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169 | print("You should consider upgrading using: pip install --upgrade glances") |
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170 |