Event is now a Dataclass

9 files changed, 16 insertions, 422 deletions

diff --git a/README.rst b/README.rst
index d83d4ff5..1346ad0a 100644
--- a/README.rst
+++ b/README.rst
@@ -79,9 +79,12 @@ Requirements
 ============
 
 - ``python>=3.8`` (use Glances 3.4.x for lower Python version)
-- ``psutil>=5.3.0`` (better with latest version)
+- ``psutil`` (better with latest version)
 - ``defusedxml`` (in order to monkey patch xmlrpc)
+- ``packaging`` (for the version comparison)
 - ``ujson`` (an optimized alternative to the standard json module)
+- ``pytz`` (for the timezone support)
+- ``pydantic`` (for the data validation support)
 
 *Note for Python 2 users*
 
diff --git a/glances/events.py b/glances/events.py
deleted file mode 100644
index 6658c842..00000000
--- a/glances/events.py
+++ /dev/null
@@ -1,410 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# This file is part of Glances.
-#
-# SPDX-FileCopyrightText: 2022 Nicolas Hennion <nicolas@nicolargo.com>
-#
-# SPDX-License-Identifier: LGPL-3.0-only
-#
-
-"""Manage Glances events (previously Glances logs in Glances < 3.1)."""
-
-import time
-from datetime import datetime
-
-from glances.logger import logger
-from glances.processes import glances_processes, sort_stats
-from glances.thresholds import glances_thresholds
-
-# Static decision tree for the global alert message
-# - msg: Message to be displayed (result of the decision tree)
-# - thresholds: a list of stats to take into account
-# - thresholds_min: minimal value of the thresholds sum
-# -                 0: OK
-# -                 1: CAREFUL
-# -                 2: WARNING
-# -                 3: CRITICAL
-tree = [
-    {'msg': 'No warning or critical alert detected', 'thresholds': [], 'thresholds_min': 0},
-    {'msg': 'High CPU user mode', 'thresholds': ['cpu_user'], 'thresholds_min': 2},
-    {'msg': 'High CPU kernel usage', 'thresholds': ['cpu_system'], 'thresholds_min': 2},
-    {'msg': 'High CPU I/O waiting', 'thresholds': ['cpu_iowait'], 'thresholds_min': 2},
-    {
-        'msg': 'Large CPU stolen time. System running the hypervisor is too busy.',
-        'thresholds': ['cpu_steal'],
-        'thresholds_min': 2,
-    },
-    {'msg': 'High CPU niced value', 'thresholds': ['cpu_niced'], 'thresholds_min': 2},
-    {'msg': 'System overloaded in the last 5 minutes', 'thresholds': ['load'], 'thresholds_min': 2},
-    {'msg': 'High swap (paging) usage', 'thresholds': ['memswap'], 'thresholds_min': 2},
-    {'msg': 'High memory consumption', 'thresholds': ['mem'], 'thresholds_min': 2},
-]
-
-# TODO: change the algo to use the following decision tree
-# Source: Inspire by https://scoutapm.com/blog/slow_server_flow_chart
-# _yes means threshold >= 2
-# _no  means threshold < 2
-# With threshold:
-# - 0: OK
-# - 1: CAREFUL
-# - 2: WARNING
-# - 3: CRITICAL
-tree_new = {
-    'cpu_iowait': {
-        '_yes': {
-            'memswap': {
-                '_yes': {
-                    'mem': {
-                        '_yes': {
-                            # Once you've identified the offenders, the resolution will again
-                            # depend on whether their memory usage seems business-as-usual or not.
-                            # For example, a memory leak can be satisfactorily addressed by a one-time
-                            # or periodic restart of the process.
-                            # - if memory usage seems anomalous: kill the offending processes.
-                            # - if memory usage seems business-as-usual: add RAM to the server,
-                            # or split high-memory using services to other servers.
-                            '_msg': "Memory issue"
-                        },
-                        '_no': {
-                            # ???
-                            '_msg': "Swap issue"
-                        },
-                    }
-                },
-                '_no': {
-                    # Low swap means you have a "real" IO wait problem. The next step is to see what's hogging your IO.
-                    # iotop is an awesome tool for identifying io offenders. Two things to note:
-                    # unless you've already installed iotop, it's probably not already on your system.
-                    # Recommendation: install it before you need it - - it's no fun trying to install a troubleshooting
-                    # tool on an overloaded machine (iotop requires a Linux of 2.62 or above)
-                    '_msg': "I/O issue"
-                },
-            }
-        },
-        '_no': {
-            'cpu_total': {
-                '_yes': {
-                    'cpu_user': {
-                        '_yes': {
-                            # We expect the user-time percentage to be high.
-                            # There's most likely a program or service you've configured on you server that's
-                            # hogging CPU.
-                            # Checking the % user time just confirms this. When you see that the % user-time is high,
-                            # it's time to see what executable is monopolizing the CPU
-                            # Once you've confirmed that the % usertime is high, check the process list(also provided
-                            # by top).
-                            # Be default, top sorts the process list by % CPU, so you can just look at the top process
-                            # or processes.
-                            # If there's a single process hogging the CPU in a way that seems abnormal, it's an
-                            # anomalous situation
-                            # that a service restart can fix. If there are are multiple processes taking up CPU
-                            # resources, or it
-                            # there's one process that takes lots of resources while otherwise functioning normally,
-                            # than your setup
-                            # may just be underpowered. You'll need to upgrade your server(add more cores),
-                            # or split services out onto
-                            # other boxes. In either case, you have a resolution:
-                            # - if situation seems anomalous: kill the offending processes.
-                            # - if situation seems typical given history: upgrade server or add more servers.
-                            '_msg': "CPU issue with user process(es)"
-                        },
-                        '_no': {
-                            'cpu_steal': {
-                                '_yes': {
-                                    '_msg': "CPU issue with stolen time. System running the hypervisor may be too busy."
-                                },
-                                '_no': {'_msg': "CPU issue with system process(es)"},
-                            }
-                        },
-                    }
-                },
-                '_no': {
-                    '_yes': {
-                        # ???
-                        '_msg': "Memory issue"
-                    },
-                    '_no': {
-                        # Your slowness isn't due to CPU or IO problems, so it's likely an application-specific issue.
-                        # It's also possible that the slowness is being caused by another server in your cluster, or
-                        # by an external service you rely on.
-                        # start by checking important applications for uncharacteristic slowness(the DB is a good place
-                        # to start), think through which parts of your infrastructure could be slowed down externally.
-                        # For example, do you use an externally hosted email service that could slow down critical
-                        # parts of your application ?
-                        # If you suspect another server in your cluster, strace and lsof can provide information on
-                        # what the process is doing or waiting on. Strace will show you which file descriptors are
-                        # being read or written to (or being attempted to be read from) and lsof can give you a
-                        # mapping of those file descriptors to network connections.
-                        '_msg': "External issue"
-                    },
-                },
-            }
-        },
-    }
-}
-
-
-def build_global_message():
-    """Parse the decision tree and return the message.
-
-    Note: message corresponding to the current thresholds values
-    """
-    # Compute the weight for each item in the tree
-    current_thresholds = glances_thresholds.get()
-    for i in tree:
-        i['weight'] = sum([current_thresholds[t].value() for t in i['thresholds'] if t in current_thresholds])
-    themax = max(tree, key=lambda d: d['weight'])
-    if themax['weight'] >= themax['thresholds_min']:
-        # Check if the weight is > to the minimal threshold value
-        return themax['msg']
-    else:
-        return tree[0]['msg']
-
-
-class GlancesEvents(object):
-
-    """This class manages events inside the Glances software.
-
-    Events is a list of event (stored in the self.events_list var)
-    event_state = "OK|CAREFUL|WARNING|CRITICAL"
-    event_type = "CPU*|LOAD|MEM|MON"
-    event_value = value
-
-    Item (or event) is defined by:
-        {
-            "begin": "begin",
-            "end": "end",
-            "state": "WARNING|CRITICAL",
-            "type": "CPU|LOAD|MEM",
-            "max": MAX,
-            "avg": AVG,
-            "min": MIN,
-            "sum": SUM,
-            "count": COUNT,
-            "top": [top 3 process name],
-            "desc": "Processes description",
-            "sort": "top sort key",
-            "global": "global alert message"
-        }
-    """
-
-    def __init__(self, max_events=10, min_duration=6, min_interval=6):
-        """Init the events class.
-
-        max_events: maximum size of the events list
-        min_duration: events duration should be > min_duration to be taken into account (in seconds)
-        min_interval: minimal interval between same kind of alert (in seconds)
-        """
-        # Maximum size of the events list
-        self.set_max_events(max_events)
-
-        # Minimal event duraton time (in seconds)
-        self.set_min_duration(min_duration)
-
-        # Minimal interval between same kind of alert (in seconds)
-        self.set_min_interval(min_interval)
-
-        # Init the logs list
-        self.events_list = []
-
-    def set_max_events(self, max_events):
-        """Set the maximum size of the events list."""
-        self.max_events = max_events
-
-    def set_min_duration(self, min_duration):
-        """Set the minimal event duration time (in seconds)."""
-        self.min_duration = min_duration
-
-    def set_min_interval(self, min_interval):
-        """Set the minimum interval between same kind of alert (in seconds)."""
-        self.min_interval = min_interval
-
-    def get(self):
-        """Return the raw events list."""
-        return self.events_list
-
-    def len(self):
-        """Return the number of events in the logs list."""
-        return self.events_list.__len__()
-
-    def __event_exist(self, event_time, event_type):
-        """Return the event position in the events list if:
-        type is matching
-        and (end is < 0 or event_time - end < min_interval)
-        Return -1 if the item is not found.
-        """
-        for i in range(self.len()):
-            if ((self.events_list[i]['end'] < 0) or
-                (event_time - self.events_list[i]['end'] < self.min_interval)) and \
-               self.events_list[i]['type'] == event_type:
-                return i
-        return -1
-
-    def get_event_sort_key(self, event_type):
-        """Return the process sort key"""
-        # Process sort depending on alert type
-        if event_type.startswith("MEM"):
-            # Sort TOP process by memory_percent
-            ret = 'memory_percent'
-        elif event_type.startswith("CPU_IOWAIT"):
-            # Sort TOP process by io_counters (only for Linux OS)
-            ret = 'io_counters'
-        else:
-            # Default sort is...
-            ret = 'cpu_percent'
-        return ret
-
-    def set_process_sort(self, event_type):
-        """Define the process auto sort key from the alert type."""
-        if glances_processes.auto_sort:
-            glances_processes.set_sort_key(self.get_event_sort_key(event_type))
-
-    def reset_process_sort(self):
-        """Reset the process auto sort key."""
-        if glances_processes.auto_sort:
-            glances_processes.set_sort_key('auto')
-
-    def add(self, event_state, event_type, event_value, proc_list=None, proc_desc="", min_duration=None):
-        """Add a new item to the logs list.
-
-        event_state = "OK|CAREFUL|WARNING|CRITICAL"
-        event_type = "CPU|LOAD|MEM|..."
-        event_value = value
-        proc_list = list of processes
-        proc_desc = processes description
-        global_message = global alert message
-
-        If 'event' is a 'new one', add it at the beginning of the list.
-        If 'event' is not a 'new one', update the list .
-        When finished if event duration < peak_time then the alert is not set.
-        """
-        event_time = time.mktime(datetime.now().timetuple())
-        global_message = build_global_message()
-        proc_list = proc_list or glances_processes.get_list()
-
-        # Add or update the log
-        event_index = self.__event_exist(event_time, event_type)
-        if event_index < 0:
-            # Event did not exist, add it
-            self._create_event(event_time, event_state, event_type, event_value,
-                               proc_desc, global_message)
-        else:
-            # Event exist, update it
-            self._update_event(event_time, event_index, event_state, event_type, event_value,
-                               proc_list, proc_desc, global_message)
-
-        return self.len()
-
-    def _create_event(self, event_time, event_state, event_type, event_value,
-                      proc_desc, global_message):
-        """Add a new item in the log list.
-
-        Item is added only if the criticality (event_state) is WARNING or CRITICAL.
-        """
-        if event_state == "WARNING" or event_state == "CRITICAL":
-            # Define the automatic process sort key
-            self.set_process_sort(event_type)
-
-            # Create the new log item
-            # Time is stored in Epoch format
-            # Epoch -> DMYHMS = datetime.fromtimestamp(epoch)
-            item = {
-                "begin": event_time,
-                "end": -1,
-                "state": event_state,
-                "type": event_type,
-                "max": event_value,
-                "avg": event_value,
-                "min": event_value,
-                "sum": event_value,
-                "count": 1,
-                "top": [],
-                "desc": proc_desc,
-                "sort": glances_processes.sort_key,
-                "global": global_message,
-            }
-
-            # Add the item to the list
-            self.events_list.insert(0, item)
-
-            # Limit the list to 'max_events' items
-            if self.len() > self.max_events:
-                self.events_list.pop()
-            return True
-        else:
-            return False
-
-    def _update_event(self, event_time, event_index, event_state, event_type, event_value,
-                      proc_list, proc_desc, global_message):
-        """Update an event in the list"""
-        if event_state in ('OK', 'CAREFUL') and self.events_list[event_index]['end'] < 0:
-            # Close the event
-            self._close_event(event_time, event_index)
-        elif event_state in ('OK', 'CAREFUL') and self.events_list[event_index]['end'] >= 0:
-            # Event is already closed, do nothing
-            pass
-        else:  # event_state == "WARNING" or event_state == "CRITICAL"
-            # Set process sort key
-            self.set_process_sort(event_type)
-
-            # It's an ongoing event, set the end time to -1
-            self.events_list[event_index]['end'] = -1
-
-            # Min/Max/Sum/Count/Avergae value
-            self.events_list[event_index]['min'] = min(self.events_list[event_index]['min'], event_value)
-            self.events_list[event_index]['max'] = max(self.events_list[event_index]['max'], event_value)
-            self.events_list[event_index]['sum'] += event_value
-            self.events_list[event_index]['count'] += 1
-            self.events_list[event_index]['avg'] = self.events_list[event_index]['sum'] / self.events_list[event_index]['count']
-
-            if event_state == "CRITICAL":
-                # Avoid to change from CRITICAL to WARNING
-                # If an events have reached the CRITICAL state, it can't go back to WARNING
-                self.events_list[event_index]['state'] = event_state
-
-                # TOP PROCESS LIST (only for CRITICAL ALERT)
-                events_sort_key = self.get_event_sort_key(event_type)
-
-                # Sort the current process list to retrieve the TOP 3 processes
-                self.events_list[event_index]['top'] = [p['name'] for p in sort_stats(proc_list, events_sort_key)[0:3]]
-                self.events_list[event_index]['sort'] = events_sort_key
-
-            # MONITORED PROCESSES DESC
-            self.events_list[event_index]['desc'] = proc_desc
-
-            # Global message:
-            self.events_list[event_index]['global'] = global_message
-
-        return True
-
-    def _close_event(self, event_time, event_index):
-        """Close an event in the list"""
-        # Reset the automatic process sort key
-        self.reset_process_sort()
-
-        # Set the end of the events
-        if event_time - self.events_list[event_index]['begin'] >= self.min_duration:
-            # If event is >= min_duration seconds
-            self.events_list[event_index]['end'] = event_time
-        else:
-            # If event < min_duration seconds, ignore
-            self.events_list.remove(self.events_list[event_index])
-
-    def clean(self, critical=False):
-        """Clean the logs list by deleting finished items.
-
-        By default, only delete WARNING message.
-        If critical = True, also delete CRITICAL message.
-        """
-        # Create a new clean list
-        clean_events_list = []
-        while self.len() > 0:
-            item = self.events_list.pop()
-            if item['end'] < 0 or (not critical and item['state'].startswith("CRITICAL")):
-                clean_events_list.insert(0, item)
-        # The list is now the clean one
-        self.events_list = clean_events_list
-        return self.len()
-
-
-glances_events = GlancesEvents()
diff --git a/glances/outputs/glances_curses.py b/glances/outputs/glances_curses.py
index 484b3b73..468d6d0b 100644
--- a/glances/outputs/glances_curses.py
+++ b/glances/outputs/glances_curses.py
@@ -14,7 +14,7 @@ import sys
 
 from glances.globals import MACOS, WINDOWS, nativestr, u, itervalues, enable, disable
 from glances.logger import logger
-from glances.events import glances_events
+from glances.events_list import glances_events
 from glances.processes import glances_processes, sort_processes_key_list
 from glances.outputs.glances_unicode import unicode_message
 from glances.timer import Timer
diff --git a/glances/outputs/static/js/components/plugin-alert.vue b/glances/outputs/static/js/components/plugin-alert.vue
index 48a0478f..5eb7cabf 100644
--- a/glances/outputs/static/js/components/plugin-alert.vue
+++ b/glances/outputs/static/js/components/plugin-alert.vue
@@ -53,7 +53,6 @@ export default {
                 alert.avg = alertalertStats.avg;
                 alert.max = alertalertStats.max;
                 alert.top = alertalertStats.top.join(', ');
-                alert.global = alertalertStats.global;
 
                 if (!alert.ongoing) {
                     const duration = alert.end - alert.begin;
diff --git a/glances/outputs/static/public/glances.js b/glances/outputs/static/public/glances.js
index 5ecc180a..220bf9ca 100644
--- a/glances/outputs/static/public/glances.js
+++ b/glances/outputs/static/public/glances.js
@@ -28,4 +28,4 @@ function n(e){return"[object Object]"===Object.prototype.toString.call(e)}Object
  * https://jaywcjlove.github.io/hotkeys-js 
  * Licensed under the MIT license 
  */
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