Checks whether Pylint detects incorrect use of len(sequence) inside conditions.
1 | # -*- coding: utf-8 -*- |
||
2 | # |
||
3 | # This file is part of Glances. |
||
4 | # |
||
5 | # Copyright (C) 2019 Nicolargo <[email protected]> |
||
6 | # |
||
7 | # Glances is free software; you can redistribute it and/or modify |
||
8 | # it under the terms of the GNU Lesser General Public License as published by |
||
9 | # the Free Software Foundation, either version 3 of the License, or |
||
10 | # (at your option) any later version. |
||
11 | # |
||
12 | # Glances is distributed in the hope that it will be useful, |
||
13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||
15 | # GNU Lesser General Public License for more details. |
||
16 | # |
||
17 | # You should have received a copy of the GNU Lesser General Public License |
||
18 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
||
19 | |||
20 | """Manage the AMPs list.""" |
||
21 | |||
22 | import os |
||
23 | import re |
||
24 | import threading |
||
25 | |||
26 | from glances.compat import listkeys, iteritems |
||
27 | from glances.logger import logger |
||
28 | from glances.globals import amps_path |
||
29 | from glances.processes import glances_processes |
||
30 | |||
31 | |||
32 | class AmpsList(object): |
||
33 | |||
34 | """This class describes the optional application monitoring process list. |
||
35 | |||
36 | The AMP list is a list of processes with a specific monitoring action. |
||
37 | |||
38 | The list (Python list) is composed of items (Python dict). |
||
39 | An item is defined (dict keys): |
||
40 | *... |
||
41 | """ |
||
42 | |||
43 | # The dict |
||
44 | __amps_dict = {} |
||
45 | |||
46 | def __init__(self, args, config): |
||
47 | """Init the AMPs list.""" |
||
48 | self.args = args |
||
49 | self.config = config |
||
50 | |||
51 | # Load the AMP configurations / scripts |
||
52 | self.load_configs() |
||
53 | |||
54 | def load_configs(self): |
||
55 | """Load the AMP configuration files.""" |
||
56 | if self.config is None: |
||
57 | return False |
||
58 | |||
59 | # Display a warning (deprecated) message if the monitor section exist |
||
60 | if "monitor" in self.config.sections(): |
||
61 | logger.warning("A deprecated [monitor] section exists in the Glances configuration file. You should use the new Applications Monitoring Process module instead (http://glances.readthedocs.io/en/develop/aoa/amps.html).") |
||
62 | |||
63 | header = "glances_" |
||
64 | # For each AMP scrip, call the load_config method |
||
65 | for s in self.config.sections(): |
||
66 | if s.startswith("amp_"): |
||
67 | # An AMP section exists in the configuration file |
||
68 | # If an AMP script exist in the glances/amps folder, use it |
||
69 | amp_conf_name = s[4:] |
||
70 | amp_script = os.path.join(amps_path, header + s[4:] + ".py") |
||
71 | if not os.path.exists(amp_script): |
||
72 | # If not, use the default script |
||
73 | amp_script = os.path.join(amps_path, "glances_default.py") |
||
74 | try: |
||
75 | amp = __import__(os.path.basename(amp_script)[:-3]) |
||
76 | except ImportError as e: |
||
77 | logger.warning("Missing Python Lib ({}), cannot load {} AMP".format(e, amp_conf_name)) |
||
78 | except Exception as e: |
||
79 | logger.warning("Cannot load {} AMP ({})".format(amp_conf_name, e)) |
||
80 | else: |
||
81 | # Add the AMP to the dictionary |
||
82 | # The key is the AMP name |
||
83 | # for example, the file glances_xxx.py |
||
84 | # generate self._amps_list["xxx"] = ... |
||
85 | self.__amps_dict[amp_conf_name] = amp.Amp(name=amp_conf_name, args=self.args) |
||
86 | # Load the AMP configuration |
||
87 | self.__amps_dict[amp_conf_name].load_config(self.config) |
||
88 | # Log AMPs list |
||
89 | logger.debug("AMPs list: {}".format(self.getList())) |
||
90 | |||
91 | return True |
||
92 | |||
93 | def __str__(self): |
||
94 | return str(self.__amps_dict) |
||
95 | |||
96 | def __repr__(self): |
||
97 | return self.__amps_dict |
||
98 | |||
99 | def __getitem__(self, item): |
||
100 | return self.__amps_dict[item] |
||
101 | |||
102 | def __len__(self): |
||
103 | return len(self.__amps_dict) |
||
104 | |||
105 | def update(self): |
||
106 | """Update the command result attributed.""" |
||
107 | # Get the current processes list (once) |
||
108 | processlist = glances_processes.getlist() |
||
109 | |||
110 | # Iter upon the AMPs dict |
||
111 | for k, v in iteritems(self.get()): |
||
112 | if not v.enable(): |
||
113 | # Do not update if the enable tag is set |
||
114 | continue |
||
115 | |||
116 | amps_list = self._build_amps_list(v, processlist) |
||
117 | |||
118 | if len(amps_list) > 0: |
||
0 ignored issues
–
show
Unused Code
introduced
by
Loading history...
|
|||
119 | # At least one process is matching the regex |
||
120 | logger.debug("AMPS: {} processes {} detected ({})".format(len(amps_list), |
||
121 | k, |
||
122 | amps_list)) |
||
123 | # Call the AMP update method |
||
124 | thread = threading.Thread(target=v.update_wrapper, args=[amps_list]) |
||
125 | thread.start() |
||
126 | else: |
||
127 | # Set the process number to 0 |
||
128 | v.set_count(0) |
||
129 | if v.count_min() is not None and v.count_min() > 0: |
||
130 | # Only display the "No running process message" if countmin is defined |
||
131 | v.set_result("No running process") |
||
132 | |||
133 | return self.__amps_dict |
||
134 | |||
135 | def _build_amps_list(self, amp_value, processlist): |
||
136 | """Return the AMPS process list according to the amp_value |
||
137 | |||
138 | Search application monitored processes by a regular expression |
||
139 | """ |
||
140 | ret = [] |
||
141 | try: |
||
142 | # Search in both cmdline and name (for kernel thread, see #1261) |
||
143 | for p in processlist: |
||
144 | add_it = False |
||
145 | if (re.search(amp_value.regex(), p['name']) is not None): |
||
146 | add_it = True |
||
147 | else: |
||
148 | for c in p['cmdline']: |
||
149 | if (re.search(amp_value.regex(), c) is not None): |
||
150 | add_it = True |
||
151 | break |
||
152 | if add_it: |
||
153 | ret.append({'pid': p['pid'], |
||
154 | 'cpu_percent': p['cpu_percent'], |
||
155 | 'memory_percent': p['memory_percent']}) |
||
156 | |||
157 | except (TypeError, KeyError) as e: |
||
158 | logger.debug("Can not build AMPS list ({})".format(e)) |
||
159 | |||
160 | return ret |
||
161 | |||
162 | def getList(self): |
||
163 | """Return the AMPs list.""" |
||
164 | return listkeys(self.__amps_dict) |
||
165 | |||
166 | def get(self): |
||
167 | """Return the AMPs dict.""" |
||
168 | return self.__amps_dict |
||
169 | |||
170 | def set(self, new_dict): |
||
171 | """Set the AMPs dict.""" |
||
172 | self.__amps_dict = new_dict |
||
173 |