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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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"""History class.""" |
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import os |
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from glances.compat import iterkeys |
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from glances.logger import logger |
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try: |
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from matplotlib import __version__ as matplotlib_version |
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import matplotlib.pyplot as plt |
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except ImportError: |
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matplotlib_check = False |
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logger.warning('Cannot load Matplotlib library. Please install it using "pip install matplotlib"') |
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else: |
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matplotlib_check = True |
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logger.info('Load Matplotlib version %s' % matplotlib_version) |
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class GlancesHistory(object): |
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"""This class define the object to manage stats history.""" |
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def __init__(self, output_folder): |
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self.output_folder = output_folder |
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def get_output_folder(self): |
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"""Return the output folder where the graph are generated.""" |
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return self.output_folder |
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def graph_enabled(self): |
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"""Return True if Glances can generate history graphs.""" |
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return matplotlib_check |
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def reset(self, stats): |
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"""Reset all the history.""" |
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if not self.graph_enabled(): |
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return False |
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for p in stats.getAllPlugins(): |
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h = stats.get_plugin(p).get_stats_history() |
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if h is not None: |
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stats.get_plugin(p).reset_stats_history() |
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return True |
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def get_graph_color(self, item): |
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"""Get the item's color.""" |
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try: |
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ret = item['color'] |
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except KeyError: |
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return '#FFFFFF' |
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else: |
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return ret |
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def get_graph_legend(self, item): |
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"""Get the item's legend.""" |
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return item['name'] |
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def get_graph_yunit(self, item, pre_label=''): |
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"""Get the item's Y unit.""" |
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try: |
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unit = " (%s)" % item['y_unit'] |
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except KeyError: |
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unit = '' |
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if pre_label == '': |
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label = '' |
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else: |
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label = pre_label.split('_')[0] |
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return "%s%s" % (label, unit) |
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def generate_graph(self, stats): |
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"""Generate graphs from plugins history. |
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Return the number of output files generated by the function. |
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""" |
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if not self.graph_enabled(): |
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return 0 |
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index_all = 0 |
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for p in stats.getAllPlugins(): |
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h = stats.get_plugin(p).get_stats_history() |
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# Data |
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if h is None: |
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# History (h) not available for plugin (p) |
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continue |
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# Init graph |
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plt.clf() |
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index_graph = 0 |
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handles = [] |
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labels = [] |
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for i in stats.get_plugin(p).get_items_history_list(): |
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if i['name'] in iterkeys(h): |
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# The key exist |
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# Add the curves in the current chart |
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logger.debug("Generate graph: %s %s" % (p, i['name'])) |
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index_graph += 1 |
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# Labels |
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handles.append(plt.Rectangle((0, 0), 1, 1, fc=self.get_graph_color(i), ec=self.get_graph_color(i), linewidth=2)) |
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labels.append(self.get_graph_legend(i)) |
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# Legend |
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plt.ylabel(self.get_graph_yunit(i, pre_label='')) |
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# Curves |
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plt.grid(True) |
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plt.plot_date(h['date'], h[i['name']], |
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fmt='', drawstyle='default', linestyle='-', |
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color=self.get_graph_color(i), |
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xdate=True, ydate=False) |
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if index_graph == 1: |
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# Title only on top of the first graph |
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plt.title(p.capitalize()) |
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else: |
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# The key did not exist |
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# Find if anothers key ends with the key |
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# Ex: key='tx' => 'ethernet_tx' |
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# Add one curve per chart |
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stats_history_filtered = sorted([key for key in iterkeys(h) if key.endswith('_' + i['name'])]) |
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logger.debug("Generate graphs: %s %s" % |
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(p, stats_history_filtered)) |
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if len(stats_history_filtered) > 0: |
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# Create 'n' graph |
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# Each graph iter through the stats |
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plt.clf() |
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index_item = 0 |
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for k in stats_history_filtered: |
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index_item += 1 |
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plt.subplot( |
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len(stats_history_filtered), 1, index_item) |
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plt.ylabel(self.get_graph_yunit(i, pre_label=k)) |
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plt.grid(True) |
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plt.plot_date(h['date'], h[k], |
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fmt='', drawstyle='default', linestyle='-', |
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color=self.get_graph_color(i), |
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xdate=True, ydate=False) |
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if index_item == 1: |
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# Title only on top of the first graph |
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plt.title(p.capitalize() + ' ' + i['name']) |
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# Save the graph to output file |
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fig = plt.gcf() |
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fig.set_size_inches(20, 5 * index_item) |
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plt.xlabel('Date') |
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plt.savefig( |
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os.path.join(self.output_folder, 'glances_%s_%s.png' % (p, i['name'])), dpi=72) |
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index_all += 1 |
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if index_graph > 0: |
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# Save the graph to output file |
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fig = plt.gcf() |
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fig.set_size_inches(20, 10) |
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plt.legend(handles, labels, loc=1, prop={'size': 9}) |
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plt.xlabel('Date') |
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plt.savefig(os.path.join(self.output_folder, 'glances_%s.png' % p), dpi=72) |
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index_all += 1 |
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plt.close() |
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return index_all |
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nicolargo /
glances
