/usr/lib/python3/dist-packages/glances/stats.py is in glances 2.7.1.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# This file is part of Glances.
#
# Copyright (C) 2016 Nicolargo <nicolas@nicolargo.com>
#
# Glances is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Glances is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""The stats manager."""
import collections
import os
import sys
import threading
from glances.globals import exports_path, plugins_path, sys_path
from glances.logger import logger
class GlancesStats(object):
"""This class stores, updates and gives stats."""
def __init__(self, config=None, args=None):
# Set the config instance
self.config = config
# Set the argument instance
self.args = args
# Load plugins and exports modules
self.load_modules(self.args)
# Load the limits (for plugins)
self.load_limits(config)
def __getattr__(self, item):
"""Overwrite the getattr method in case of attribute is not found.
The goal is to dynamically generate the following methods:
- getPlugname(): return Plugname stat in JSON format
"""
# Check if the attribute starts with 'get'
if item.startswith('get'):
# Get the plugin name
plugname = item[len('get'):].lower()
# Get the plugin instance
plugin = self._plugins[plugname]
if hasattr(plugin, 'get_stats'):
# The method get_stats exist, return it
return getattr(plugin, 'get_stats')
else:
# The method get_stats is not found for the plugin
raise AttributeError(item)
else:
# Default behavior
raise AttributeError(item)
def load_modules(self, args):
"""Wrapper to load: plugins and export modules."""
# Init the plugins dict
self._plugins = collections.defaultdict(dict)
# Load the plugins
self.load_plugins(args=args)
# Init the export modules dict
self._exports = collections.defaultdict(dict)
# Load the export modules
self.load_exports(args=args)
# Restoring system path
sys.path = sys_path
def load_plugins(self, args=None):
"""Load all plugins in the 'plugins' folder."""
header = "glances_"
for item in os.listdir(plugins_path):
if (item.startswith(header) and
item.endswith(".py") and
item != (header + "plugin.py")):
# Import the plugin
plugin = __import__(os.path.basename(item)[:-3])
# Add the plugin to the dictionary
# The key is the plugin name
# for example, the file glances_xxx.py
# generate self._plugins_list["xxx"] = ...
plugin_name = os.path.basename(item)[len(header):-3].lower()
if plugin_name in ('help', 'amps', 'ports'):
self._plugins[plugin_name] = plugin.Plugin(args=args, config=self.config)
else:
self._plugins[plugin_name] = plugin.Plugin(args=args)
# Log plugins list
logger.debug("Available plugins list: {}".format(self.getAllPlugins()))
def load_exports(self, args=None):
"""Load all export modules in the 'exports' folder."""
if args is None:
return False
header = "glances_"
# Transform the arguments list into a dict
# The aim is to chec if the export module should be loaded
args_var = vars(locals()['args'])
for item in os.listdir(exports_path):
export_name = os.path.basename(item)[len(header):-3].lower()
if (item.startswith(header) and
item.endswith(".py") and
item != (header + "export.py") and
item != (header + "history.py") and
args_var['export_' + export_name] is not None and
args_var['export_' + export_name] is not False):
# Import the export module
export_module = __import__(os.path.basename(item)[:-3])
# Add the export to the dictionary
# The key is the module name
# for example, the file glances_xxx.py
# generate self._exports_list["xxx"] = ...
self._exports[export_name] = export_module.Export(args=args, config=self.config)
# Log plugins list
logger.debug("Available exports modules list: {}".format(self.getExportList()))
return True
def getAllPlugins(self):
"""Return the plugins list."""
return [p for p in self._plugins]
def getExportList(self):
"""Return the exports modules list."""
return [e for e in self._exports]
def load_limits(self, config=None):
"""Load the stats limits (except the one in the exclude list)."""
# For each plugins, call the load_limits method
for p in self._plugins:
self._plugins[p].load_limits(config)
def update(self):
"""Wrapper method to update the stats."""
# For standalone and server modes
# For each plugins, call the update method
for p in self._plugins:
# logger.debug("Update %s stats" % p)
self._plugins[p].update()
def export(self, input_stats=None):
"""Export all the stats.
Each export module is ran in a dedicated thread.
"""
# threads = []
input_stats = input_stats or {}
for e in self._exports:
logger.debug("Export stats using the %s module" % e)
thread = threading.Thread(target=self._exports[e].update,
args=(input_stats,))
# threads.append(thread)
thread.start()
def getAll(self):
"""Return all the stats (list)."""
return [self._plugins[p].get_raw() for p in self._plugins]
def getAllExports(self):
"""
Return all the stats to be exported (list).
Default behavor is to export all the stat
"""
return [self._plugins[p].get_export() for p in self._plugins]
def getAllAsDict(self):
"""Return all the stats (dict)."""
# Python > 2.6
# {p: self._plugins[p].get_raw() for p in self._plugins}
ret = {}
for p in self._plugins:
ret[p] = self._plugins[p].get_raw()
return ret
def getAllLimits(self):
"""Return the plugins limits list."""
return [self._plugins[p].limits for p in self._plugins]
def getAllLimitsAsDict(self):
"""Return all the stats limits (dict)."""
ret = {}
for p in self._plugins:
ret[p] = self._plugins[p].limits
return ret
def getAllViews(self):
"""Return the plugins views."""
return [self._plugins[p].get_views() for p in self._plugins]
def getAllViewsAsDict(self):
"""Return all the stats views (dict)."""
ret = {}
for p in self._plugins:
ret[p] = self._plugins[p].get_views()
return ret
def get_plugin_list(self):
"""Return the plugin list."""
return self._plugins
def get_plugin(self, plugin_name):
"""Return the plugin name."""
if plugin_name in self._plugins:
return self._plugins[plugin_name]
else:
return None
def end(self):
"""End of the Glances stats."""
# Close export modules
for e in self._exports:
self._exports[e].exit()
# Close plugins
for p in self._plugins:
self._plugins[p].exit()
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