############################################################################## # # Copyright (c) 2004, 2007 Nexedi SARL and Contributors. All Rights Reserved. # Sebastien Robin <seb@nexedi.com> # # WARNING: This program as such is intended to be used by professional # programmers who take the whole responsability of assessing all potential # consequences resulting from its eventual inadequacies and bugs # End users who are looking for a ready-to-use solution with commercial # garantees and support are strongly adviced to contract a Free Software # Service Company # # This program is Free Software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version 2 # of the License, or (at your option) any later version. # # This program 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 General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. # ############################################################################## import types from AccessControl import ClassSecurityInfo from Products.CMFCore.utils import getToolByName from Products.ERP5Type import Permissions, PropertySheet, Constraint, Interface from Products.ERP5Type.XMLObject import XMLObject from Products.ERP5Type.Base import WorkflowMethod from Acquisition import aq_base, aq_parent, aq_inner, aq_acquire from Products.CMFCore.utils import getToolByName from DateTime import DateTime from Products.ERP5Type.Message import Message from Products.ERP5Type.DateUtils import addToDate from zLOG import LOG class PeriodicityMixin: """ Periodicity is a Mixin Class used to calculate date periodicity. """ security = ClassSecurityInfo() security.declareObjectProtected(Permissions.AccessContentsInformation) def _validateMinute(self, date, previous_date): """ Validate if date's minute matches the periodicity definition """ periodicity_minute_frequency = self.getPeriodicityMinuteFrequency() periodicity_minute_list = self.getPeriodicityMinuteList() if (periodicity_minute_frequency is None) and \ (periodicity_minute_list in ([], None, ())): # in this case, we may want to have an periodicity every hour # based on the start date # without defining anything about minutes periodicity, # so we compare with minutes with the one defined # in the previous alarm date return (date.minute() == previous_date.minute()) if periodicity_minute_frequency not in ('', None): return (date.minute() % periodicity_minute_frequency) == 0 elif len(periodicity_minute_list) > 0: return date.minute() in periodicity_minute_list def _validateHour(self, date): """ Validate if date's hour matches the periodicity definition """ periodicity_hour_frequency = self.getPeriodicityHourFrequency() periodicity_hour_list = self.getPeriodicityHourList() if (periodicity_hour_frequency is None) and \ (periodicity_hour_list in ([], None, ())): return 1 if periodicity_hour_frequency not in ('', None): return (date.hour() % periodicity_hour_frequency) == 0 elif len(periodicity_hour_list) > 0: return date.hour() in periodicity_hour_list def _validateDay(self, date): """ Validate if date's day matches the periodicity definition """ periodicity_day_frequency = self.getPeriodicityDayFrequency() periodicity_month_day_list = self.getPeriodicityMonthDayList() if (periodicity_day_frequency is None) and \ (periodicity_month_day_list in ([], None, ())): return 1 if periodicity_day_frequency not in ('', None): return (date.day() % periodicity_day_frequency) == 0 elif len(periodicity_month_day_list) > 0: return date.day() in periodicity_month_day_list def _validateWeek(self, date): """ Validate if date's week matches the periodicity definition """ periodicity_week_frequency = self.getPeriodicityWeekFrequency() periodicity_week_day_list = self.getPeriodicityWeekDayList() periodicity_week_list = self.getPeriodicityWeekList() if (periodicity_week_frequency is None) and \ (periodicity_week_day_list in ([], None, ())) and \ (periodicity_week_list is None): return 1 if periodicity_week_frequency not in ('', None): if not((date.week() % periodicity_week_frequency) == 0): return 0 if periodicity_week_day_list not in (None, (), []): if not (date.Day() in periodicity_week_day_list): return 0 if periodicity_week_list not in (None, (), []): if not (date.week() in periodicity_week_list): return 0 return 1 def _validateMonth(self, date): """ Validate if date's month matches the periodicity definition """ periodicity_month_frequency = self.getPeriodicityMonthFrequency() periodicity_month_list = self.getPeriodicityMonthList() if (periodicity_month_frequency is None) and \ (periodicity_month_list in ([], None, ())): return 1 if periodicity_month_frequency not in ('', None): return (date.month() % periodicity_month_frequency) == 0 elif len(periodicity_month_list) > 0: return date.month() in periodicity_month_list def getNextPeriodicalDate(self, current_date, next_start_date=None): """ Get the next date where this periodic event should start. We have to take into account the start date, because sometimes an event may be started by hand. We must be sure to never forget to start an event, even with some delays. Here are some rules : - if the periodicity start date is in the past and we never starts this periodic event, then return the periodicity start date. - if the periodicity start date is in the past but we already have started the periodic event, then see XXX Better API is needed. It may defined which minimal time duration has to be added in order to calculate next date. Ex: here, we use minute as smaller duration. On CalendarPeriod, day is the smaller duration. """ if next_start_date is None: next_start_date = current_date if next_start_date > current_date: return else: # Make sure the old date is not too far away day_count = int(current_date-next_start_date) next_start_date = next_start_date + day_count previous_date = next_start_date next_start_date = addToDate(next_start_date, minute=1) while 1: validate_minute = self._validateMinute(next_start_date, previous_date) validate_hour = self._validateHour(next_start_date) validate_day = self._validateDay(next_start_date) validate_week = self._validateWeek(next_start_date) validate_month = self._validateMonth(next_start_date) if (next_start_date >= current_date \ and validate_minute and validate_hour and validate_day \ and validate_week and validate_month): break else: if not(validate_minute): next_start_date = addToDate(next_start_date, minute=1) else: if not(validate_hour): next_start_date = addToDate(next_start_date, hour=1) else: if not(validate_day and validate_week and validate_month): # We have to reset hours and minutes in order to make sure # we will start at the beginning of the next day next_start_date = DateTime(next_start_date.Date() + ' 00:00:00 %s' % next_start_date.timezone()) next_start_date = addToDate(next_start_date, day=1) else: # Everything is right, but the date is still not bigger # than the current date, so we must continue next_start_date = addToDate(next_start_date, minute=1) return next_start_date # XXX May be we should create a Date class for following methods ??? security.declareProtected(Permissions.View, 'getWeekDayList') def getWeekDayList(self): """ returns something like ['Sunday','Monday',...] """ return DateTime._days security.declareProtected(Permissions.View, 'getWeekDayItemList') def getWeekDayItemList(self): """ returns something like [('Sunday', 'Sunday'), ('Monday', 'Monday'),...] """ return [(Message(domain='erp5_ui', message=x), x) \ for x in self.getWeekDayList()] security.declareProtected(Permissions.View, 'getWeekDayItemList') def getMonthItemList(self): """ returns something like [('January', 1), ('February', 2),...] """ # DateTime._months return '' as first item return [(Message(domain='erp5_ui', message=DateTime._months[i]), i) \ for i in range(1, len(DateTime._months))] security.declareProtected(Permissions.View,'getPeriodicityWeekDayList') def getPeriodicityWeekDayList(self): """ Make sure that the list of days is ordered """ #LOG('getPeriodicityWeekDayList',0,'we should order') day_list = self._baseGetPeriodicityWeekDayList() new_list = [] for day in self.getWeekDayList(): if day_list is not None: if day in day_list: new_list += [day] return new_list class Alarm(XMLObject, PeriodicityMixin): """ An Alarm is in charge of checking anything (quantity of a certain resource on the stock, consistency of some order,....) periodically. This check can span over multiple activities through an active process. An Alarm is capable of displaying the last result of the check process which was run in background. The result can be provided either as a boolean value (alarm was raised or not) or in the form of an HTML report which is intended to be displayed in a control center. Moreover, user may be notified automatically of alarm failures. Alarm may also provide a solution if something wrong happens. This solution takes the form of a script which can be invoked by the administrator or by the user by clicking on a button displayed in the Alarm control center. """ # CMF Type Definition meta_type = 'ERP5 Alarm' portal_type = 'Alarm' add_permission = Permissions.AddPortalContent isPortalContent = 1 isRADContent = 1 # Declarative security security = ClassSecurityInfo() security.declareObjectProtected(Permissions.AccessContentsInformation) # Default Properties property_sheets = ( PropertySheet.Base , PropertySheet.XMLObject , PropertySheet.CategoryCore , PropertySheet.DublinCore , PropertySheet.Periodicity , PropertySheet.Document , PropertySheet.Task , PropertySheet.Alarm ) security.declareProtected(Permissions.View, 'isActive') def isActive(self): """ This method returns only True or False. It simply tells if this alarm is currently active or not. An Alarm is said to be active whenever some calculation is undergoing either as part of the sensing process (activeSense) or as part of the problem resolution process (solve). """ return self.hasActivity(only_valid=1) security.declareProtected(Permissions.ModifyPortalContent, 'activeSense') def activeSense(self, fixit=0): """ This method launches the sensing process as activities. It is intended to launch a very long process made of many activities. It returns nothing since the results are collected in an active process. The result of the sensing process can be obtained by invoking the sense method or by requesting a report. """ # LOG('activeSense, self.getPath()',0,self.getPath()) # Set the next date at which this method should be invoked self.setNextAlarmDate() # Find the active sensing method and invoke it # as an activity so that we can benefit from # distribution of alarm processing as soon as possible method_id = self.getActiveSenseMethodId() if method_id not in (None, ''): # A tag is provided as a parameter in order to be # able to notify the user after all processes are ended # Tag is generated from portal_ids so that it can be retrieved # later when creating an active process for example # We do some inspection to keep compatibility # (because fixit and tag were not set previously) tag = str(self.portal_ids.generateNewLengthId(id_group=self.getId())) kw = {} method = getattr(self, method_id) name_list = method.func_code.co_varnames if 'fixit' in name_list or (method.func_defaults is not None and len(method.func_defaults) < len(name_list)): # New API - also if variable number of named parameters getattr(self.activate(tag=tag), method_id)(fixit=fixit, tag=tag) else: # Old API getattr(self.activate(tag=tag), method_id)() if self.isAlarmNotificationMode(): self.activate(after_tag=tag).notify(include_active=True) security.declareProtected(Permissions.ModifyPortalContent, 'sense') def sense(self, process=None): """ This method returns True or False. False for no problem, True for problem. This method should respond very quickly. Complex alarms should use activity based calculations through the activeSense method. The process parameter can be used to retrive sense values for past processes. If it is None, it will return the status of last completed active result. """ method_id = self.getSenseMethodId() if process is None: process = self.getLastActiveProcess() # First case - simple cron style alarm # with no results if process is None and method_id in (None, ''): return None # Second case - this alarm does not use an # active process. This is perfectly acceptable # in some cases, whenever the sense calculation # is really fast. if process is None: method = getattr(self, method_id) return method() # Third case - this alarm uses an # active process and a method_id is defined if method_id not in (None, ''): method = getattr(self, method_id) return method(process=process) # Fourth case - this alarm uses an # active process but no method_id is defined for result in process.getResultList(): # This is useful is result is returned as a Return instance if result.severity > result.INFO: return True # This is the default case if getattr(result, 'result', False): return True return False # This comment here is kept for historical reasons # There used to be a call to process.setSenseValue(value) # This means that each time an alarm is displayed, # we modify it to keep its latest sense result somewhere # This was bad for two reasons: first of all, it is # actually a caching problem, and if necesssary, # this caching problem should be solved by using caches. # Then, if caching is required, it may not only be # at display time and not only for sense(). So, the # baseline is to use caches and if necessary to develop # a new cache plugin which uses ZODB to store values # for a long time. security.declareProtected(Permissions.View, 'report') def report(self, reset=0, process=None): """ This methods produces a report (HTML) to display the results of the sensing process. The report is intended to provide a nice visualisation of the sensing process, of problems which may occur or of the fact that there was no problem. No calculation should be made normally at this time (or very fast calculation). Complex alarms should implement calculation through the invocation of activeSense. Report implementation is normally made using an ERP5 Form. """ if process is None: process = self.getLastActiveProcess().getRelativeUrl() elif not type(process) in types.StringTypes: process = process.getRelativeUrl() list_action = _getViewFor(self, view='report') if getattr(aq_base(list_action), 'isDocTemp', 0): return apply(list_action, (self, self.REQUEST), process=process, reset=reset) else: return list_action(process=process, reset=reset) security.declareProtected(Permissions.ModifyPortalContent, 'solve') def solve(self): """ This method tries resolve a problems detected by an Alarm within the sensing process. Problem resolution is implemented by an external script. If no external script is dehfined, activeSense is invoked with fixit=1 """ method_id = self.getSolveMethodId() if method_id not in (None, ''): method = getattr(self.activate(), method_id) return method() return self.activeSense(fixit=1) security.declareProtected(Permissions.ModifyPortalContent, 'notify') def notify(self, include_active=False): """ This method is called to notify people that some alarm has been sensed. Notification consists of sending an email to the system address if nothing was defined or to notify all agents defined on the alarm if specified. """ notification_mode = self.getAlarmNotificationMode() if notification_mode == 'never': return # Grab real latest result. Otherwise, we would check n-1 execution as n is # still considered running, and its result would be skipped. active_process = self.getLastActiveProcess(include_active=include_active) if self.sense(process=active_process): prefix = 'ERROR' else: if notification_mode != 'always': return prefix = 'INFO' notification_tool = getToolByName(self, 'portal_notifications') candidate_list = self.getDestinationValueList() if not candidate_list: candidate_list = None result_list = [x for x in active_process.getResultList() if x is not None] attachment_list = [] if len(result_list): def sort_result_list(a, b): result = - cmp(a.severity, b.severity) if result == 0: result = cmp(a.summary, b.summary) return result result_list.sort(sort_result_list) rendered_alarm_result_list = ['%02i summary: %s\n%s\n----' % (int(getattr(x, 'severity', 0)), getattr(x, 'summary', ''), getattr(x, 'detail', '')) for x in result_list] rendered_alarm_result = '\n'.join(rendered_alarm_result_list) attachment_list.append({'name': 'alarm_result.txt', 'content': rendered_alarm_result, 'mime_type': 'text/plain'}) notification_tool.sendMessage(recipient=candidate_list, subject='[%s] ERP5 Alarm Notification: %s' % (prefix, self.getTitle()), message=""" Alarm Title: %s Alarm Description: %s Alarm URL: %s """ % (self.getTitle(), self.getDescription(), self.absolute_url()), attachment_list=attachment_list) security.declareProtected(Permissions.View, 'getLastActiveProcess') def getLastActiveProcess(self, include_active=False): """ This returns the last active process finished. So it will not returns the current one """ if include_active: limit = 1 else: limit = self.isActive() and 2 or 1 active_process_list = self.getPortalObject().portal_catalog( portal_type='Active Process', limit=limit, sort_on=(('creation_date', 'DESC'), ), causality_uid=self.getUid()) if len(active_process_list) < limit: process = None else: process = active_process_list[-1].getObject() return process security.declareProtected(Permissions.ModifyPortalContent, 'newActiveProcess') def newActiveProcess(self, **kw): """ We will create a new active process in order to store new results, then this process will be added to the list of processes """ tag = self.portal_ids.getLastLengthGeneratedId(id_group=self.getId()) activate_kw = kw.get('activate_kw', {}) if tag is not None: activate_kw.setdefault('tag', str(tag)) portal_activities = getToolByName(self,'portal_activities') active_process = portal_activities.newActiveProcess(start_date=DateTime(), causality_value=self, activate_kw=activate_kw, **kw) return active_process security.declareProtected(Permissions.View, 'setNextAlarmDate') def setNextAlarmDate(self, current_date=None): """ Save the next alarm date """ if self.getPeriodicityStartDate() is None: return next_start_date = self.getAlarmDate() if current_date is None: # This is usefull to set the current date as parameter for # unit testing, by default it should be now current_date = DateTime() next_start_date = self.getNextPeriodicalDate(current_date, next_start_date=next_start_date) if next_start_date is not None: self.Alarm_zUpdateAlarmDate(uid=self.getUid(), alarm_date=next_start_date) security.declareProtected(Permissions.View, 'getAlarmDate') def getAlarmDate(self): """ returns something like ['Sunday','Monday',...] """ alarm_date=None # No periodicity start date, return None if self.getPeriodicityStartDate() is not None: result_list = self.Alarm_zGetAlarmDate(uid=self.getUid()) if len(result_list)==1: alarm_date = result_list[0].alarm_date periodicity_start_date = self.getPeriodicityStartDate() if alarm_date < periodicity_start_date: alarm_date = periodicity_start_date # convert the date to the user provided timezone alarm_zone = periodicity_start_date.timezone() alarm_date = alarm_date.toZone(alarm_zone) return alarm_date