Beispiel #1
0
class TriggersConfigurator(CompositeNode):
    security = SecurityInformation.from_default()
    secured_by(security)
    
    def __init__(self, *args):
        self._triggers = None
        self.security_manager = None
        self._pdo_lock = Lock()
        super(TriggersConfigurator, self).__init__(*args)
    def configure(self, config):
        self.setattr('path', config.get('path','/triggerconfig'))
        self.setattr('manager', config.get('container','/services/Trigger Manager'))
        self.secured = as_internal_node("/services").secured
        super(TriggersConfigurator, self).configure(config)
    def configuration(self):
        config = super(TriggersConfigurator, self).configuration()
        config['path'] = self.getattr('path')
        config['manager'] = self.getattr('manager')
        return config
    def start(self):
        filename = '%s (%s)' % (self.name, 'triggers')
        self.manager = self.nodespace.as_node(self.manager)
        self._pdo_lock.acquire()
        try:
            if self._triggers is None:
                self._triggers = PersistentDictionary(
                    filename, encode=None, decode=None)
            if not self._triggers:
                pdodata = PersistentDataObject(self, dmtype=GC_NEVER)
                if os.path.exists(pdodata.filename()):
                    msglog.log('broadway', msglog.types.INFO, 
                               "Migrating previous trigger data.")
                    pdodata.triggers = {}
                    pdodata.load()
                    self._triggers.update(pdodata.triggers)
                    pdodata.destroy()
                del(pdodata)
            self._loadtriggers()
            if self.secured:
                self.security_manager = self.as_node("/services/Security Manager")
            else:
                self.security_manager = None
        finally: 
            self._pdo_lock.release()
        return super(TriggersConfigurator, self).start()
    def stop(self):
        super(TriggersConfigurator, self).stop()
        self.manager = None
    def _loadtriggers(self, names=None):
        triggers = []
        if names is None:
            names = self._triggers.keys()
        elif not isinstance(names, (list, tuple, set)):
            names = [names]
        for name in names:
            dump = self._triggers[name]
            try:
                trigger = unmarshal(dump)
            except:
                msglog.log("broadway", msglog.types.WARN, 
                           "Unable to load trigger: %s" % name)
                msglog.exception(prefix="handled")
            else:
                triggers.append(trigger)
        return triggers
    def _storetriggers(self, triggers=None):
        if triggers is None:
            triggers = self.manager.get_triggers()
        elif not isinstance(triggers, (list, set, tuple)):
            triggers = [triggers]
        for trigger in triggers:
            try:
                dump = marshal(trigger)
            except:
                msglog.log("broadway", msglog.types.WARN, 
                           "Unable to marshal trigger: %s" % trigger.name)
                msglog.exception(prefix="handled")
            else:
                self._triggers[trigger.name] = dump
        return triggers
    def _poptriggers(self, names=None):
        if names is None:
            existing = set(self.manager.get_trigger_names())
            stored = self._triggers.keys()
            names = set(stored) - set(existing)
        elif not isinstance(names, (list, tuple, set)):
            names = [names]
        removed = []
        for name in names:
            try:
                self._triggers.pop(name)
            except:
                msglog.log("broadway", msglog.types.WARN, 
                           "Unable to remove trigger data: %s" % name)
                msglog.exception(prefix="handled")
            else:
                removed.append(name)
        return removed
    def match(self, path):
        return path.startswith(self.path)
    security.protect('create_trigger', 'Configure')
    security.protect('create_node', 'Configure')
    def create_trigger(self, name, config=()):
        config = dict(config)
        if "type" in config:
            type = config.pop("type")
        else:
            type = "ComparisonTrigger"
        if isinstance(type, str):
            if type.endswith("ComparisonTrigger"):
                type = ComparisonTrigger
            elif type.endswith("BoundTrigger"):
                type = BoundTrigger
            else:
                raise ValueError("Uknown type: %r" % type)
        config.setdefault("name", name)
        config.setdefault("parent", self.manager)
        trigger = self._create_trigger(type, config)
        self._storetriggers([trigger])
        return trigger.name
    create_node = create_trigger
    
    security.protect('remove_trigger', 'Configure')
    security.protect('remove_node', 'Configure')
    def remove_trigger(self, name):
        self._remove_trigger(name)
        self._poptriggers([name])
        return name
    remove_node = remove_trigger
    
    security.protect('configure_trigger', 'Configure')
    security.protect('configure_node', 'Configure')
    def configure_trigger(self, name=None, config=()):
        config = dict(config)
        if name is None:
            if config.has_key("name"):
                name = config["name"]
            else:
                raise TypeError("configure_trigger() requires"
                                " name or configuration with name")
        trigger = self.manager.get_trigger(name)
        try: 
            trigger.stop()
        except Exception, error:
            msglog.log('broadway', msglog.types.WARN,
                       'Ignoring following exception on stop.')
            msglog.exception(prefix = 'Handled')
        trigger.configure(config)
        try: 
            trigger.start()
        except Exception, error:
            msglog.log('broadway', msglog.types.WARN,
                       'Ignoring following exception on start.')
            msglog.exception(prefix = 'Handled')
class TriggersConfigurator(CompositeNode):
    security = SecurityInformation.from_default()
    secured_by(security)

    def __init__(self, *args):
        self._triggers = None
        self.security_manager = None
        self._pdo_lock = Lock()
        super(TriggersConfigurator, self).__init__(*args)

    def configure(self, config):
        self.setattr('path', config.get('path', '/triggerconfig'))
        self.setattr('manager',
                     config.get('container', '/services/Trigger Manager'))
        self.secured = as_internal_node("/services").secured
        super(TriggersConfigurator, self).configure(config)

    def configuration(self):
        config = super(TriggersConfigurator, self).configuration()
        config['path'] = self.getattr('path')
        config['manager'] = self.getattr('manager')
        return config

    def start(self):
        filename = '%s (%s)' % (self.name, 'triggers')
        self.manager = self.nodespace.as_node(self.manager)
        self._pdo_lock.acquire()
        try:
            if self._triggers is None:
                self._triggers = PersistentDictionary(filename,
                                                      encode=None,
                                                      decode=None)
            if not self._triggers:
                pdodata = PersistentDataObject(self, dmtype=GC_NEVER)
                if os.path.exists(pdodata.filename()):
                    msglog.log('broadway', msglog.types.INFO,
                               "Migrating previous trigger data.")
                    pdodata.triggers = {}
                    pdodata.load()
                    self._triggers.update(pdodata.triggers)
                    pdodata.destroy()
                del (pdodata)
            self._loadtriggers()
            if self.secured:
                self.security_manager = self.as_node(
                    "/services/Security Manager")
            else:
                self.security_manager = None
        finally:
            self._pdo_lock.release()
        return super(TriggersConfigurator, self).start()

    def stop(self):
        super(TriggersConfigurator, self).stop()
        self.manager = None

    def _loadtriggers(self, names=None):
        triggers = []
        if names is None:
            names = self._triggers.keys()
        elif not isinstance(names, (list, tuple, set)):
            names = [names]
        for name in names:
            dump = self._triggers[name]
            try:
                trigger = unmarshal(dump)
            except:
                msglog.log("broadway", msglog.types.WARN,
                           "Unable to load trigger: %s" % name)
                msglog.exception(prefix="handled")
            else:
                triggers.append(trigger)
        return triggers

    def _storetriggers(self, triggers=None):
        if triggers is None:
            triggers = self.manager.get_triggers()
        elif not isinstance(triggers, (list, set, tuple)):
            triggers = [triggers]
        for trigger in triggers:
            try:
                dump = marshal(trigger)
            except:
                msglog.log("broadway", msglog.types.WARN,
                           "Unable to marshal trigger: %s" % trigger.name)
                msglog.exception(prefix="handled")
            else:
                self._triggers[trigger.name] = dump
        return triggers

    def _poptriggers(self, names=None):
        if names is None:
            existing = set(self.manager.get_trigger_names())
            stored = self._triggers.keys()
            names = set(stored) - set(existing)
        elif not isinstance(names, (list, tuple, set)):
            names = [names]
        removed = []
        for name in names:
            try:
                self._triggers.pop(name)
            except:
                msglog.log("broadway", msglog.types.WARN,
                           "Unable to remove trigger data: %s" % name)
                msglog.exception(prefix="handled")
            else:
                removed.append(name)
        return removed

    def match(self, path):
        return path.startswith(self.path)

    security.protect('create_trigger', 'Configure')
    security.protect('create_node', 'Configure')

    def create_trigger(self, name, config=()):
        config = dict(config)
        if "type" in config:
            type = config.pop("type")
        else:
            type = "ComparisonTrigger"
        if isinstance(type, str):
            if type.endswith("ComparisonTrigger"):
                type = ComparisonTrigger
            elif type.endswith("BoundTrigger"):
                type = BoundTrigger
            else:
                raise ValueError("Uknown type: %r" % type)
        config.setdefault("name", name)
        config.setdefault("parent", self.manager)
        trigger = self._create_trigger(type, config)
        self._storetriggers([trigger])
        return trigger.name

    create_node = create_trigger

    security.protect('remove_trigger', 'Configure')
    security.protect('remove_node', 'Configure')

    def remove_trigger(self, name):
        self._remove_trigger(name)
        self._poptriggers([name])
        return name

    remove_node = remove_trigger

    security.protect('configure_trigger', 'Configure')
    security.protect('configure_node', 'Configure')

    def configure_trigger(self, name=None, config=()):
        config = dict(config)
        if name is None:
            if config.has_key("name"):
                name = config["name"]
            else:
                raise TypeError("configure_trigger() requires"
                                " name or configuration with name")
        trigger = self.manager.get_trigger(name)
        try:
            trigger.stop()
        except Exception, error:
            msglog.log('broadway', msglog.types.WARN,
                       'Ignoring following exception on stop.')
            msglog.exception(prefix='Handled')
        trigger.configure(config)
        try:
            trigger.start()
        except Exception, error:
            msglog.log('broadway', msglog.types.WARN,
                       'Ignoring following exception on start.')
            msglog.exception(prefix='Handled')
Beispiel #3
0
class TrendManager(CompositeNode):
    implements(ITrendManager)
    security = SecurityInformation.from_default()
    secured_by(security)

    def __init__(self, *args):
        super(TrendManager, self).__init__(*args)
        self.logger_url = None
        self.trends = None
        self._pdo_lock = Lock()
        self._trendconfig = None
        self.__running = False
        self.secured = True
        return

    def _persist_trend_configuration(self, trend):
        self._pdo_lock.acquire()
        try:
            self._trendconfig[trend.name] = marshal(trend)
        finally:
            self._pdo_lock.release()
        return

    def _delete_trend_configuration(self, trend_name):
        self._pdo_lock.acquire()
        try:
            if self._trendconfig.has_key(trend_name):
                del self._trendconfig[trend_name]
        finally:
            self._pdo_lock.release()
        return

    def configure(self, config):
        self.setattr("name", config.get("name", "Trend Manager"))
        self.setattr("logger_url", config.get("logger_url", "/services/logger"))
        self.secured = as_internal_node("/services").secured
        super(TrendManager, self).configure(config)
        return

    def configuration(self):
        config = super(TrendManager, self).configuration()
        config["logger_url"] = self.getattr("logger_url")
        return config

    def start(self):
        try:
            self._pdo_lock.acquire()
            try:
                if self.__running:
                    return
                self.__running = True
                self._trendconfig = PersistentDictionary(filename(self), encode=None, decode=None)
                if not self._trendconfig:
                    pdodata = PersistentDataObject(self, dmtype=GC_NEVER)
                    if os.path.exists(pdodata.filename()):
                        msglog.log("broadway", msglog.types.INFO, "Migrating previous trend data")
                        pdodata.trends = {}
                        pdodata.load()
                        self._trendconfig.update(pdodata.trends)
                    del (pdodata)
            finally:
                self._pdo_lock.release()
            super(TrendManager, self).start()
            self.logger = node.as_internal_node(self.logger_url)
            if self.has_child("trends"):
                self.trends = self.get_child("trends")
            else:
                self.trends = CompositeNode()
                self.trends.configure({"parent": self, "name": "trends"})
                self.trends.start()
            corrupt_trends = []
            for trendname, trenddump in self._trendconfig.items():
                msg = "Loading trend: %s" % trendname
                msglog.log("trendmanager", msglog.types.INFO, msg)
                try:
                    trend = unmarshal(trenddump)
                except:
                    corrupt_trends.append(trendname)
                    msg = "Failed to load trend: %s" % trendname
                    msglog.log("trendmanager", msglog.types.ERR, msg)
                    msglog.exception(prefix="Handled")
            for trendname in corrupt_trends:
                try:
                    msg = "Deleting trend information: %s" % trendname
                    msglog.log("trendmanager", msglog.types.INFO, msg)
                    self._delete_trend_configuration(trendname)
                    if self.trends.has_child(trendname):
                        trend = self.trends.get_child(trendname)
                        trend.prune(force=True)
                except:
                    msglog.exception(prefix="Handled")
        except:
            self.__running = False
            raise
        return

    def stop(self):
        self.__running = False
        super(TrendManager, self).stop()
        return

    def is_trendable(self, log_node):
        if log_node.configuration().has_key("period"):
            # Assume a log with a period is valid.
            return True
        if not log_node.has_child("columns"):
            # If the log does not have a columns container, than it doesn't
            # look like a proper log.
            return False
        column_nodes = log_node.get_child("columns").children_nodes()
        if not column_nodes:
            # If the log does not have any columns, than it doesn't
            # look like a proper log.
            return False
        if len(column_nodes) > MAX_TRENDABLE_COLUMNS:
            # If the log has more than MAX_TRENDABLE_COLUMNS (9), then the
            # EmbeddedGraph can not display it.
            return False
        has_timestamp = False
        for column in column_nodes:
            column_configuration = column.configuration()
            if not column_configuration.has_key("name"):
                # OK, this should NEVER happen...
                return False
            if column_configuration["name"] == "timestamp":
                has_timestamp = True
            if not column_configuration.has_key("conversion"):
                # To be safe, each column must have a conversion...
                return False
            if column_configuration["conversion"] != "magnitude":
                # And the conversion must be a 'magnitude'
                return False
        if not has_timestamp:
            # Graph requires a timestamp.
            return False
        return True

    security.protect("get_trends", "View")

    def get_trends(self):
        if not self.__running:
            raise ENotRunning()
        trend_names = []
        for name in self.trends.children_names():
            trend_names.append(name)
        for log_node in self.logger.children_nodes():
            trend_name = log_node.name
            if not trend_name in trend_names:
                if self.is_trendable(log_node):
                    trend_adapter = PeriodicLogTrendAdapter()
                    trend_adapter.configure({"parent": self.trends, "name": trend_name})
                    trend_adapter.start()
                    self._persist_trend_configuration(trend_adapter)
                    trend_names.append(trend_name)
        trend_names.sort()
        trends = []
        for trend_name in trend_names:
            trends.append(self.trends.get_child(trend_name))
        return trends

    security.protect("get_trend", "View")

    def get_trend(self, trend_name):
        if not self.__running:
            raise ENotRunning()
        if not self.trends.has_child(trend_name):
            # Autodiscoveresque.
            self.get_trends()

        # @fixme Raise a better exception...
        return self.trends.get_child(trend_name)

    def get_trend_preferences(self, trend_name):
        trend_name = urllib.unquote_plus(trend_name)
        trend = self.get_trend(trend_name)
        preferences = trend.get_preferences()
        points = trend.get_points()
        for i in xrange(0, len(points)):
            try:
                points[i]["color"] = preferences["points"][i]["color"] = "#%06X" % int(
                    preferences["points"][i]["color"]
                )
            except:
                points[i]["color"] = preferences["points"][i]["color"]
            points[i]["y-axis"] = preferences["points"][i]["y-axis"]
        preferences["points"] = points
        try:
            preferences["background"]["color"] = "#%06X" % int(preferences["background"]["color"])
        except:
            pass
        try:
            preferences["text"]["color"] = "#%06X" % int(preferences["text"]["color"])
        except:
            pass
        msglog.log("broadway", msglog.types.INFO, "Preferences: %r" % preferences)
        return preferences

    security.protect("delete_trend", "Configure")

    def delete_trend(self, trend_name):
        if not self.__running:
            raise ENotRunning()
        self._delete_trend_configuration(trend_name)
        if not self.trends.has_child(trend_name):
            # Autodiscoveresque.
            self.get_trends()
        # @fixme Raise a better exception...
        trend = self.trends.get_child(trend_name)
        trend.prune()
        trend.destroy()
        return

    security.protect("update_trend", "Configure")

    def update_trend(self, trend_name, new_cfg, **kw):
        if not self.__running:
            raise ENotRunning()
        confirmed = kw.get("confirmed", 0)
        deletedata = kw.get("deletedata", 0)
        trend = self.get_trend(trend_name)
        confirmation = ConfirmUpdateTrend(trend, new_cfg)
        # @fixme, dleimbro
        if 0:  # not confirmed and confirmation.requires_confirmation():
            return confirmation
        if confirmation.configuration_changed():
            try:
                if deletedata:
                    trend.delete_existing_data()
                if confirmation.requires_stop_and_restart():
                    trend.stop()
                trend.configure(confirmation.configuration())
                if confirmation.requires_stop_and_restart():
                    trend.start()
            except:
                msglog.exception()
                try:
                    trend.stop()
                except:
                    msglog.exception()
                trend.configure(confirmation.original_configuration())
                trend.start()
                raise
            else:
                self._persist_trend_configuration(trend)
        return None

    def _new_trend(self, name):
        if not self.__running:
            raise ENotRunning()
        """
        Return an instance that implements ITrend interface for new trend with
        no points.
        """
        new_trend = Trend()
        period = 60
        points = []
        preferences = {}
        new_trend.configure(
            {"parent": self.trends, "name": name, "period": period, "points": points, "preferences": preferences}
        )
        return new_trend

    security.protect("new_trend", "Configure")

    def new_trend(self, name=None):
        if name:
            return self._new_trend(name)
        while True:
            try:
                new_trend = self._new_trend(self.generate_trend_name())
                break  # was going into loop and generating thousands of trends.
                # This breaks loop when an unused (generated) trend name is found
            except ENameInUse:
                continue

        return new_trend

    security.protect("generate_trend_name", "View")

    def generate_trend_name(self):
        i_trend = 1
        while True:
            try:
                self.get_trend("Trend %d" % i_trend)
                i_trend += 1
            except ENoSuchName:
                break
        return "Trend %d" % i_trend
Beispiel #4
0
class TrendManager(CompositeNode):
    implements(ITrendManager)
    security = SecurityInformation.from_default()
    secured_by(security)

    def __init__(self, *args):
        super(TrendManager, self).__init__(*args)
        self.logger_url = None
        self.trends = None
        self._pdo_lock = Lock()
        self._trendconfig = None
        self.__running = False
        self.secured = True
        return

    def _persist_trend_configuration(self, trend):
        self._pdo_lock.acquire()
        try:
            self._trendconfig[trend.name] = marshal(trend)
        finally:
            self._pdo_lock.release()
        return

    def _delete_trend_configuration(self, trend_name):
        self._pdo_lock.acquire()
        try:
            if self._trendconfig.has_key(trend_name):
                del self._trendconfig[trend_name]
        finally:
            self._pdo_lock.release()
        return

    def configure(self, config):
        self.setattr('name', config.get('name', 'Trend Manager'))
        self.setattr('logger_url', config.get('logger_url',
                                              '/services/logger'))
        self.secured = as_internal_node("/services").secured
        super(TrendManager, self).configure(config)
        return

    def configuration(self):
        config = super(TrendManager, self).configuration()
        config['logger_url'] = self.getattr('logger_url')
        return config

    def start(self):
        try:
            self._pdo_lock.acquire()
            try:
                if self.__running:
                    return
                self.__running = True
                self._trendconfig = PersistentDictionary(filename(self),
                                                         encode=None,
                                                         decode=None)
                if not self._trendconfig:
                    pdodata = PersistentDataObject(self, dmtype=GC_NEVER)
                    if os.path.exists(pdodata.filename()):
                        msglog.log('broadway', msglog.types.INFO,
                                   "Migrating previous trend data")
                        pdodata.trends = {}
                        pdodata.load()
                        self._trendconfig.update(pdodata.trends)
                    del (pdodata)
            finally:
                self._pdo_lock.release()
            super(TrendManager, self).start()
            self.logger = node.as_internal_node(self.logger_url)
            if self.has_child('trends'):
                self.trends = self.get_child('trends')
            else:
                self.trends = CompositeNode()
                self.trends.configure({'parent': self, 'name': 'trends'})
                self.trends.start()
            corrupt_trends = []
            for trendname, trenddump in self._trendconfig.items():
                msg = "Loading trend: %s" % trendname
                msglog.log('trendmanager', msglog.types.INFO, msg)
                try:
                    trend = unmarshal(trenddump)
                except:
                    corrupt_trends.append(trendname)
                    msg = "Failed to load trend: %s" % trendname
                    msglog.log('trendmanager', msglog.types.ERR, msg)
                    msglog.exception(prefix='Handled')
            for trendname in corrupt_trends:
                try:
                    msg = "Deleting trend information: %s" % trendname
                    msglog.log('trendmanager', msglog.types.INFO, msg)
                    self._delete_trend_configuration(trendname)
                    if self.trends.has_child(trendname):
                        trend = self.trends.get_child(trendname)
                        trend.prune(force=True)
                except:
                    msglog.exception(prefix='Handled')
        except:
            self.__running = False
            raise
        return

    def stop(self):
        self.__running = False
        super(TrendManager, self).stop()
        return

    def is_trendable(self, log_node):
        if log_node.configuration().has_key('period'):
            # Assume a log with a period is valid.
            return True
        if not log_node.has_child('columns'):
            # If the log does not have a columns container, than it doesn't
            # look like a proper log.
            return False
        column_nodes = log_node.get_child('columns').children_nodes()
        if not column_nodes:
            # If the log does not have any columns, than it doesn't
            # look like a proper log.
            return False
        if len(column_nodes) > MAX_TRENDABLE_COLUMNS:
            # If the log has more than MAX_TRENDABLE_COLUMNS (9), then the
            # EmbeddedGraph can not display it.
            return False
        has_timestamp = False
        for column in column_nodes:
            column_configuration = column.configuration()
            if not column_configuration.has_key('name'):
                # OK, this should NEVER happen...
                return False
            if column_configuration['name'] == 'timestamp':
                has_timestamp = True
            if not column_configuration.has_key('conversion'):
                # To be safe, each column must have a conversion...
                return False
            if column_configuration['conversion'] != 'magnitude':
                # And the conversion must be a 'magnitude'
                return False
        if not has_timestamp:
            # Graph requires a timestamp.
            return False
        return True

    security.protect('get_trends', 'View')

    def get_trends(self):
        if not self.__running: raise ENotRunning()
        trend_names = []
        for name in self.trends.children_names():
            trend_names.append(name)
        for log_node in self.logger.children_nodes():
            trend_name = log_node.name
            if not trend_name in trend_names:
                if (self.is_trendable(log_node)):
                    trend_adapter = PeriodicLogTrendAdapter()
                    trend_adapter.configure({
                        'parent': self.trends,
                        'name': trend_name,
                    })
                    trend_adapter.start()
                    self._persist_trend_configuration(trend_adapter)
                    trend_names.append(trend_name)
        trend_names.sort()
        trends = []
        for trend_name in trend_names:
            trends.append(self.trends.get_child(trend_name))
        return trends

    security.protect('get_trend', 'View')

    def get_trend(self, trend_name):
        if not self.__running: raise ENotRunning()
        if not self.trends.has_child(trend_name):
            # Autodiscoveresque.
            self.get_trends()

        # @fixme Raise a better exception...
        return self.trends.get_child(trend_name)

    def get_trend_preferences(self, trend_name):
        trend_name = urllib.unquote_plus(trend_name)
        trend = self.get_trend(trend_name)
        preferences = trend.get_preferences()
        points = trend.get_points()
        for i in xrange(0, len(points)):
            try:
                points[i]["color"] = preferences["points"][i][
                    "color"] = "#%06X" % int(preferences["points"][i]["color"])
            except:
                points[i]["color"] = preferences["points"][i]["color"]
            points[i]["y-axis"] = preferences["points"][i]["y-axis"]
        preferences["points"] = points
        try:
            preferences["background"]["color"] = "#%06X" % int(
                preferences["background"]["color"])
        except:
            pass
        try:
            preferences["text"]["color"] = "#%06X" % int(
                preferences["text"]["color"])
        except:
            pass
        msglog.log("broadway", msglog.types.INFO,
                   "Preferences: %r" % preferences)
        return preferences

    security.protect('delete_trend', 'Configure')

    def delete_trend(self, trend_name):
        if not self.__running: raise ENotRunning()
        self._delete_trend_configuration(trend_name)
        if not self.trends.has_child(trend_name):
            # Autodiscoveresque.
            self.get_trends()
        # @fixme Raise a better exception...
        trend = self.trends.get_child(trend_name)
        trend.prune()
        trend.destroy()
        return

    security.protect('update_trend', 'Configure')

    def update_trend(self, trend_name, new_cfg, **kw):
        if not self.__running: raise ENotRunning()
        confirmed = kw.get('confirmed', 0)
        deletedata = kw.get('deletedata', 0)
        trend = self.get_trend(trend_name)
        confirmation = ConfirmUpdateTrend(trend, new_cfg)
        #@fixme, dleimbro
        if 0:  #not confirmed and confirmation.requires_confirmation():
            return confirmation
        if confirmation.configuration_changed():
            try:
                if deletedata:
                    trend.delete_existing_data()
                if confirmation.requires_stop_and_restart():
                    trend.stop()
                trend.configure(confirmation.configuration())
                if confirmation.requires_stop_and_restart():
                    trend.start()
            except:
                msglog.exception()
                try:
                    trend.stop()
                except:
                    msglog.exception()
                trend.configure(confirmation.original_configuration())
                trend.start()
                raise
            else:
                self._persist_trend_configuration(trend)
        return None

    def _new_trend(self, name):
        if not self.__running: raise ENotRunning()
        """
        Return an instance that implements ITrend interface for new trend with
        no points.
        """
        new_trend = Trend()
        period = 60
        points = []
        preferences = {}
        new_trend.configure({
            'parent': self.trends,
            'name': name,
            'period': period,
            'points': points,
            'preferences': preferences
        })
        return new_trend

    security.protect('new_trend', 'Configure')

    def new_trend(self, name=None):
        if name:
            return self._new_trend(name)
        while True:
            try:
                new_trend = self._new_trend(self.generate_trend_name())
                break  #was going into loop and generating thousands of trends.
                #This breaks loop when an unused (generated) trend name is found
            except ENameInUse:
                continue

        return new_trend

    security.protect('generate_trend_name', 'View')

    def generate_trend_name(self):
        i_trend = 1
        while True:
            try:
                self.get_trend('Trend %d' % i_trend)
                i_trend += 1
            except ENoSuchName:
                break
        return ('Trend %d' % i_trend)
Beispiel #5
0
class EquipmentMonitor(CompositeNode):
    implements(IEquipmentMonitor)
    def __init__(self, *args):
        self.test_machines = []
        self.synclock = RLock()
        self.threadcount = 1
        self.formatter = None
        self.transporter = None
        self.smservice = None
        self.subscriptions = None
        self.running = Flag()
        self.work_threads = []
        self.work_queue = Queue()
        self.scheduling_lock = Lock()
        self.execution_groups = Dictionary()
        self.smnodeurl = '/services/Subscription Manager'
        super(EquipmentMonitor, self).__init__(*args)
    def configure(self, config):
        self.smnodeurl = config.get('subscription_manager', self.smnodeurl)
        self.threadcount = int(config.get('threadcount', self.threadcount))
        super(EquipmentMonitor, self).configure(config)
    def configuration(self):
        config = super(EquipmentMonitor, self).configuration()
        config['subscription_manager'] = self.smnodeurl
        config['threadcount'] = str(self.threadcount)
        return config
    def start(self):
        if self.is_running():
            raise TypeError("Equipment Monitor already running.")
        if TESTING and not self.test_machines:
            self.test_machines = setup_machines()
            machinecount = len(self.test_machines)
            self.debugout("Setup %d test machines" % machinecount)
        self.synclock.acquire()
        try:
            self.running.set()
            if self.subscriptions and not self.subscriptions.closed():
                self.subscriptions.close()
            self.formatter = None
            self.transporter = None
            children = self.children_nodes()
            for childnode in children:
                if IFormatter.providedBy(childnode):
                    if self.formatter is not None:
                        raise TypeError("Already has formatter child.")
                    self.formatter = childnode
                if ITransporter.providedBy(childnode):
                    if self.transporter is not None:
                        raise TypeError("Already has transporter child.")
                    self.transporter = childnode
            if not self.formatter:
                raise TypeError("Must have one formatter child node.")
            if not self.transporter:
                raise TypeError("Must have one transporter child node.")
            self.smservice = as_node(self.smnodeurl)
            self.subscriptions = PersistentDictionary(
                self.name, encode=self.serialize_subscription, 
                decode=self.unserialize_subscription)
            pdodata = PersistentDataObject(self)
            if os.path.exists(pdodata.filename()):
                msglog.log('broadway', msglog.types.WARN, 
                           "Equipment Monitor upgrading persistence.")
                migrate = frompdo(pdodata)
                self.subscriptions.update(migrate)
                message = "Equipment Monitor merged %d subscriptions."
                message = message % len(migrate)
                msglog.log('broadway', msglog.types.INFO, message)
                pdodata.destroy()
                msglog.log('broadway', msglog.types.WARN, 
                           "Equipment Monitor destroyed old persistence.")
                msglog.log('broadway', msglog.types.INFO, 
                           "Equipment Monitor persistence upgrade complete.")
            del(pdodata)
            message = 'Equipment Monitor startup: %s %s'
            for subscription in self.subscriptions.values():
                try:
                    subscription.setup_subscription()
                except:
                    msglog.exception(prefix="handled")
                else:
                    self.debugout(message % ('setup', subscription))
            skipcounts = []
            for i in range(0, 1 + len(self.subscriptions) / 30):
                skipcounts.extend([i + 1] * 30)
            self.setup_work_threads()
            for subscription in self.subscriptions.values():
                try: 
                    subscription.start(skipcounts.pop())
                except: 
                    msglog.exception(prefix = "Handled")        
                else:
                    self.debugout(message % ('started', subscription))
        except:
            self.cleanup_resources()
            self.running.clear()
            raise
        finally:
            self.synclock.release()
        super(EquipmentMonitor, self).start()
    def stop(self):
        if not self.is_running():
            raise TypeError('Equipment Monitor not running.')
        self.synclock.acquire()
        try:
            self.running.clear()
            message = "Equipment Monitor shutdown: %s %s"
            for subscription in self.subscriptions.values():
                try: 
                    subscription.stop()
                except: 
                    msglog.exception(prefix='Handled')
                else:
                    self.debugout(message % ('stopped', subscription))
            self.teardown_work_threads()
        except:
            message = "Exception caused Eqiupment Monitor shutdown to fail."
            msglog.log('broadway', msglog.types.ERR, message)
            self.running.set()
            raise
        else:
            self.cleanup_resources()
        finally:
            self.synclock.release()
        super(EquipmentMonitor, self).stop()
    def get_subscription(self, sid, default = None):
        return self.subscriptions.get(sid, default)
    def get_subscription_manager(self):
        return self.smservice
    def get_formatter(self):
        return self.formatter
    def get_transporter(self):
        return self.transporter
    def schedule_subscription(self, subscription, timestamp):
        self.scheduling_lock.acquire()
        try:
            schedulegroup = self.execution_groups.get(timestamp)
            if schedulegroup is None:
                schedulegroup = SubscriptionGroup(self, timestamp)
                self.execution_groups[timestamp] = schedulegroup
                schedulegroup.scheduled = scheduler.at(
                    timestamp, schedulegroup.execute)
            schedentry = schedulegroup.add_subscription(subscription)
        finally:
            self.scheduling_lock.release()
        return schedentry
    def enqueue_work(self, callback, *args):
        self.work_queue.put((callback, args))
    def dequeue_work(self, blocking = True):
        return self.work_queue.get(blocking)
    def is_running(self):
        return self.running.isSet()
    def assert_running(self):
        if not self.is_running():
            raise TypeError('Service must be running.')
        return
    def create_pushed(self, target, node_table, period=2, retries=10):
        self.assert_running()
        pushed = PushedSubscription(self, target, node_table, period, retries)
        sid = pushed.setup_subscription()
        self.subscriptions[sid] = pushed
        message = ['Equipment Monitor created subscription: ']
        message.append('Target URL: %s' % target)
        message.append('Period: %d sec' % period)
        message.append('Subscription ID: %s' % sid)
        if isinstance(node_table, str):
            message.append('Subscription for children of: %s' % node_table)
        else:
            firstthree = node_table.items()[0:3]
            message.append('Number of nodes: %d' % len(node_table))
            message.append('First three nodes: %s' % (firstthree,))
        self.debugout('\n    '.join(message), 2)
        pushed.start(1)
        return sid
    def cancel(self, sid):
        self.assert_running()
        if self.pause(sid):
            subscription = self.subscriptions.pop(sid)
            message = 'Equipment Monitor cancelled subscription: "%s"'
            self.debugout(message % sid, 2)
            return True
        return False
    def pause(self, sid, delay = None):
        subscription = self.subscriptions.get(sid)
        if subscription and subscription.is_running():
            subscription.stop()
            return True
        else:
            return False
    def play(self, sid):
        self.assert_running()
        subscription = self.subscriptions[sid]
        if not subscription.is_running():
            subscription.start()
            return True
        else:
            return False
    def reset(self, sid):
        subscription = self.subscriptions.get(sid)
        if subscription:
            subscription.reset_subscription()
            return True
        else:
            return False
    def list_subscriptions(self):
        return self.subscriptions.keys()
    def notify_group_executed(self, group):
        self.scheduling_lock.acquire()
        try:
            self.execution_groups.pop(group.timestamp)
        finally:
            self.scheduling_lock.release()
    def cleanup_resources(self):
        self.synclock.acquire()
        try:
            for group in self.execution_groups:
                try: 
                    group.scheduled.cancel()
                except:
                    msglog.exception(prefix="handled")
            self.execution_groups.clear()
            try:
                while self.work_queue.get_nowait():
                    pass
            except Empty:
                pass
            if self.transporter:
                commonitor = self.transporter.monitor
                transmanager = self.transporter.transaction_manager
                try:
                    commonitor.shutdown_channels()
                except:
                    msglog.exception(prefix="handled")
                transmanager.controllers.clear()
            if self.subscriptions and not self.subscriptions.closed():            
                self.subscriptions.close()
            self.subscriptions = None
            self.transporter = None
            self.formatter = None
        finally:
            self.synclock.release()
    def setup_work_threads(self):
        assert self.is_running()
        assert len(self.work_threads) == 0
        while len(self.work_threads) < self.threadcount:
            monitor = WorkThread(self.is_running, self.dequeue_work)
            monitor.setDaemon(True)
            monitor.start()
            self.work_threads.append(monitor)
        return len(self.work_threads)
    def teardown_work_threads(self):
        assert not self.is_running()
        threadcount = len(self.work_threads)
        map(self.work_queue.put, [None] * threadcount)
        while self.work_threads:
            self.work_threads.pop().join()
        return threadcount
    def serialize_subscription(self, subscription):
        return repr(subscription.as_dictionary())
    def unserialize_subscription(self, data):
        return PushedSubscription.from_dictionary(eval(data))
    def debugout(self, dbmessage, dblevel = 1):
        if dblevel <= DEBUG: 
            msglog.log('broadway', msglog.types.DB, dbmessage)
Beispiel #6
0
class EquipmentMonitor(CompositeNode):
    implements(IEquipmentMonitor)

    def __init__(self, *args):
        self.test_machines = []
        self.synclock = RLock()
        self.threadcount = 1
        self.formatter = None
        self.transporter = None
        self.smservice = None
        self.subscriptions = None
        self.running = Flag()
        self.work_threads = []
        self.work_queue = Queue()
        self.scheduling_lock = Lock()
        self.execution_groups = Dictionary()
        self.smnodeurl = '/services/Subscription Manager'
        super(EquipmentMonitor, self).__init__(*args)

    def configure(self, config):
        self.smnodeurl = config.get('subscription_manager', self.smnodeurl)
        self.threadcount = int(config.get('threadcount', self.threadcount))
        super(EquipmentMonitor, self).configure(config)

    def configuration(self):
        config = super(EquipmentMonitor, self).configuration()
        config['subscription_manager'] = self.smnodeurl
        config['threadcount'] = str(self.threadcount)
        return config

    def start(self):
        if self.is_running():
            raise TypeError("Equipment Monitor already running.")
        if TESTING and not self.test_machines:
            self.test_machines = setup_machines()
            machinecount = len(self.test_machines)
            self.debugout("Setup %d test machines" % machinecount)
        self.synclock.acquire()
        try:
            self.running.set()
            if self.subscriptions and not self.subscriptions.closed():
                self.subscriptions.close()
            self.formatter = None
            self.transporter = None
            children = self.children_nodes()
            for childnode in children:
                if IFormatter.providedBy(childnode):
                    if self.formatter is not None:
                        raise TypeError("Already has formatter child.")
                    self.formatter = childnode
                if ITransporter.providedBy(childnode):
                    if self.transporter is not None:
                        raise TypeError("Already has transporter child.")
                    self.transporter = childnode
            if not self.formatter:
                raise TypeError("Must have one formatter child node.")
            if not self.transporter:
                raise TypeError("Must have one transporter child node.")
            self.smservice = as_node(self.smnodeurl)
            self.subscriptions = PersistentDictionary(
                self.name,
                encode=self.serialize_subscription,
                decode=self.unserialize_subscription)
            pdodata = PersistentDataObject(self)
            if os.path.exists(pdodata.filename()):
                msglog.log('broadway', msglog.types.WARN,
                           "Equipment Monitor upgrading persistence.")
                migrate = frompdo(pdodata)
                self.subscriptions.update(migrate)
                message = "Equipment Monitor merged %d subscriptions."
                message = message % len(migrate)
                msglog.log('broadway', msglog.types.INFO, message)
                pdodata.destroy()
                msglog.log('broadway', msglog.types.WARN,
                           "Equipment Monitor destroyed old persistence.")
                msglog.log('broadway', msglog.types.INFO,
                           "Equipment Monitor persistence upgrade complete.")
            del (pdodata)
            message = 'Equipment Monitor startup: %s %s'
            for subscription in self.subscriptions.values():
                try:
                    subscription.setup_subscription()
                except:
                    msglog.exception(prefix="handled")
                else:
                    self.debugout(message % ('setup', subscription))
            skipcounts = []
            for i in range(0, 1 + len(self.subscriptions) / 30):
                skipcounts.extend([i + 1] * 30)
            self.setup_work_threads()
            for subscription in self.subscriptions.values():
                try:
                    subscription.start(skipcounts.pop())
                except:
                    msglog.exception(prefix="Handled")
                else:
                    self.debugout(message % ('started', subscription))
        except:
            self.cleanup_resources()
            self.running.clear()
            raise
        finally:
            self.synclock.release()
        super(EquipmentMonitor, self).start()

    def stop(self):
        if not self.is_running():
            raise TypeError('Equipment Monitor not running.')
        self.synclock.acquire()
        try:
            self.running.clear()
            message = "Equipment Monitor shutdown: %s %s"
            for subscription in self.subscriptions.values():
                try:
                    subscription.stop()
                except:
                    msglog.exception(prefix='Handled')
                else:
                    self.debugout(message % ('stopped', subscription))
            self.teardown_work_threads()
        except:
            message = "Exception caused Eqiupment Monitor shutdown to fail."
            msglog.log('broadway', msglog.types.ERR, message)
            self.running.set()
            raise
        else:
            self.cleanup_resources()
        finally:
            self.synclock.release()
        super(EquipmentMonitor, self).stop()

    def get_subscription(self, sid, default=None):
        return self.subscriptions.get(sid, default)

    def get_subscription_manager(self):
        return self.smservice

    def get_formatter(self):
        return self.formatter

    def get_transporter(self):
        return self.transporter

    def schedule_subscription(self, subscription, timestamp):
        self.scheduling_lock.acquire()
        try:
            schedulegroup = self.execution_groups.get(timestamp)
            if schedulegroup is None:
                schedulegroup = SubscriptionGroup(self, timestamp)
                self.execution_groups[timestamp] = schedulegroup
                schedulegroup.scheduled = scheduler.at(timestamp,
                                                       schedulegroup.execute)
            schedentry = schedulegroup.add_subscription(subscription)
        finally:
            self.scheduling_lock.release()
        return schedentry

    def enqueue_work(self, callback, *args):
        self.work_queue.put((callback, args))

    def dequeue_work(self, blocking=True):
        return self.work_queue.get(blocking)

    def is_running(self):
        return self.running.isSet()

    def assert_running(self):
        if not self.is_running():
            raise TypeError('Service must be running.')
        return

    def create_pushed(self, target, node_table, period=2, retries=10):
        self.assert_running()
        pushed = PushedSubscription(self, target, node_table, period, retries)
        sid = pushed.setup_subscription()
        self.subscriptions[sid] = pushed
        message = ['Equipment Monitor created subscription: ']
        message.append('Target URL: %s' % target)
        message.append('Period: %d sec' % period)
        message.append('Subscription ID: %s' % sid)
        if isinstance(node_table, str):
            message.append('Subscription for children of: %s' % node_table)
        else:
            firstthree = node_table.items()[0:3]
            message.append('Number of nodes: %d' % len(node_table))
            message.append('First three nodes: %s' % (firstthree, ))
        self.debugout('\n    '.join(message), 2)
        pushed.start(1)
        return sid

    def cancel(self, sid):
        self.assert_running()
        if self.pause(sid):
            subscription = self.subscriptions.pop(sid)
            message = 'Equipment Monitor cancelled subscription: "%s"'
            self.debugout(message % sid, 2)
            return True
        return False

    def pause(self, sid, delay=None):
        subscription = self.subscriptions.get(sid)
        if subscription and subscription.is_running():
            subscription.stop()
            return True
        else:
            return False

    def play(self, sid):
        self.assert_running()
        subscription = self.subscriptions[sid]
        if not subscription.is_running():
            subscription.start()
            return True
        else:
            return False

    def reset(self, sid):
        subscription = self.subscriptions.get(sid)
        if subscription:
            subscription.reset_subscription()
            return True
        else:
            return False

    def list_subscriptions(self):
        return self.subscriptions.keys()

    def notify_group_executed(self, group):
        self.scheduling_lock.acquire()
        try:
            self.execution_groups.pop(group.timestamp)
        finally:
            self.scheduling_lock.release()

    def cleanup_resources(self):
        self.synclock.acquire()
        try:
            for group in self.execution_groups:
                try:
                    group.scheduled.cancel()
                except:
                    msglog.exception(prefix="handled")
            self.execution_groups.clear()
            try:
                while self.work_queue.get_nowait():
                    pass
            except Empty:
                pass
            if self.transporter:
                commonitor = self.transporter.monitor
                transmanager = self.transporter.transaction_manager
                try:
                    commonitor.shutdown_channels()
                except:
                    msglog.exception(prefix="handled")
                transmanager.controllers.clear()
            if self.subscriptions and not self.subscriptions.closed():
                self.subscriptions.close()
            self.subscriptions = None
            self.transporter = None
            self.formatter = None
        finally:
            self.synclock.release()

    def setup_work_threads(self):
        assert self.is_running()
        assert len(self.work_threads) == 0
        while len(self.work_threads) < self.threadcount:
            monitor = WorkThread(self.is_running, self.dequeue_work)
            monitor.setDaemon(True)
            monitor.start()
            self.work_threads.append(monitor)
        return len(self.work_threads)

    def teardown_work_threads(self):
        assert not self.is_running()
        threadcount = len(self.work_threads)
        map(self.work_queue.put, [None] * threadcount)
        while self.work_threads:
            self.work_threads.pop().join()
        return threadcount

    def serialize_subscription(self, subscription):
        return repr(subscription.as_dictionary())

    def unserialize_subscription(self, data):
        return PushedSubscription.from_dictionary(eval(data))

    def debugout(self, dbmessage, dblevel=1):
        if dblevel <= DEBUG:
            msglog.log('broadway', msglog.types.DB, dbmessage)