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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 AMPs list.""" |
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import os |
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import re |
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import threading |
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from glances.globals import amps_path, listkeys |
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from glances.logger import logger |
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from glances.processes import glances_processes |
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class AmpsList: |
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"""This class describes the optional application monitoring process list. |
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The AMP list is a list of processes with a specific monitoring action. |
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The list (Python list) is composed of items (Python dict). |
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An item is defined (dict keys): |
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*... |
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""" |
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# The dict |
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__amps_dict = {} |
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def __init__(self, args, config): |
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"""Init the AMPs list.""" |
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self.args = args |
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self.config = config |
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# Load the AMP configurations / scripts |
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self.load_configs() |
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def load_configs(self): |
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"""Load the AMP configuration files.""" |
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if self.config is None: |
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return False |
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# For each AMP script, call the load_config method |
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for s in self.config.sections(): |
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if s.startswith("amp_"): |
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# An AMP section exists in the configuration file |
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# If an AMP module exist in amps_path (glances/amps) folder then use it |
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amp_name = s[4:] |
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amp_module = os.path.join(amps_path, amp_name) |
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if not os.path.exists(amp_module): |
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# If not, use the default script |
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amp_module = os.path.join(amps_path, "default") |
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try: |
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amp = __import__(os.path.basename(amp_module)) |
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except ImportError as e: |
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logger.warning(f"Missing Python Lib ({e}), cannot load AMP {amp_name}") |
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except Exception as e: |
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logger.warning(f"Cannot load AMP {amp_name} ({e})") |
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else: |
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# Add the AMP to the dictionary |
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# The key is the AMP name |
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# for example, the file glances_xxx.py |
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# generate self._amps_list["xxx"] = ... |
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self.__amps_dict[amp_name] = amp.Amp(name=amp_name, args=self.args) |
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# Load the AMP configuration |
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self.__amps_dict[amp_name].load_config(self.config) |
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# Log AMPs list |
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logger.debug(f"AMPs list: {self.getList()}") |
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return True |
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def __str__(self): |
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return str(self.__amps_dict) |
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def __repr__(self): |
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return self.__amps_dict |
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def __getitem__(self, item): |
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return self.__amps_dict[item] |
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def __len__(self): |
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return len(self.__amps_dict) |
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def update(self): |
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"""Update the command result attributed.""" |
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# Get the current processes list (once) |
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processlist = glances_processes.get_list() |
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# Iter upon the AMPs dict |
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for k, v in self.get().items(): |
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if not v.enable(): |
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# Do not update if the enable tag is set |
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continue |
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if v.regex() is None: |
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# If there is no regex, execute anyway (see issue #1690) |
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v.set_count(0) |
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# Call the AMP update method |
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thread = threading.Thread(target=v.update_wrapper, args=[[]]) |
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thread.start() |
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continue |
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amps_list = self._build_amps_list(v, processlist) |
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if amps_list: |
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# At least one process is matching the regex |
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logger.debug(f"AMPS: {len(amps_list)} processes {k} detected ({amps_list})") |
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# Call the AMP update method |
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thread = threading.Thread(target=v.update_wrapper, args=[amps_list]) |
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thread.start() |
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else: |
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# Set the process number to 0 |
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v.set_count(0) |
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if v.count_min() is not None and v.count_min() > 0: |
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# Only display the "No running process message" if count_min is defined |
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v.set_result("No running process") |
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return self.__amps_dict |
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def _build_amps_list(self, amp_value, processlist): |
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"""Return the AMPS process list according to the amp_value |
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Search application monitored processes by a regular expression |
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""" |
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try: |
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# Search in both cmdline and name (for kernel thread, see #1261) |
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ret = [ |
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{'pid': p['pid'], 'cpu_percent': p['cpu_percent'], 'memory_percent': p['memory_percent']} |
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for p in processlist |
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if re.search(amp_value.regex(), p['name']) |
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or ((cmdline := p.get('cmdline')) and re.search(amp_value.regex(), ' '.join(cmdline))) |
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] |
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except (TypeError, KeyError) as e: |
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logger.debug(f"Can not build AMPS list ({e})") |
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return ret |
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def getList(self): |
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"""Return the AMPs list.""" |
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return listkeys(self.__amps_dict) |
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def get(self): |
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"""Return the AMPs dict.""" |
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return self.__amps_dict |
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def set(self, new_dict): |
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"""Set the AMPs dict.""" |
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self.__amps_dict = new_dict |
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nicolargo /
glances
