public Configuration Read()
{
var config = Settings.GetSettings();
var intervals = new AlertIntervals(config, AlertType);
var thresholds = new AlertThreshold(config, AlertType);
var notifications = new Notifications(config);
var configuration = new Configuration(intervals, thresholds, notifications);
return configuration;
}
public void Start(Configuration c)
{
if (Notifier.StartEventSaved && !Notifier.EndEventSaved)
{
// Ensure we do not dispose of the Observers if they are in the middle of an alert cycle.
return;
}
Subscription?.Dispose();
ConfigurationSync?.Dispose();
RefreshSettings(c);
Logger.Trace("New threshold {0}", c.Thresholds.CriticalLoad);
Logger.Trace("New interval {0}", c.Intervals.CriticalNotification);
ConfigurationSync = Observable
.Interval(TimeSpan.FromMinutes(ConfigurationRefreshTime)) // Refresh the settings and counters every X minutes
.Select(i => ConfigurationReader.Read())
.DistinctUntilChanged()
.Subscribe(Start);
Counter = new CpuPerformanceCounter();
if (Enabled)
{
var alarms = Observable.Interval(c.Intervals.Measurement) // generate endless sequence of events
.Select(i => Counter.Value) // convert event index to cpu load value
.Select(load => load > c.Thresholds.CriticalLoad); // is critical? convert load to boolean
Subscription = alarms // here we throttle critical alarms
.Where(critical => critical).Sample(c.Intervals.Notification).Merge(
// allow critical notification no more often then ...
alarms // here we throttle non critical alarms
.Where(critical => !critical).Sample(c.Intervals.Notification)) // allow non critical notification no more often then ...
.Subscribe(Notifier.Notify); // our action to send notifications
}
}
protected override void RefreshSettings(Configuration c)
{
var settings = SettingsService.GetSettings();
Notifier.Email = new EmailModel { Address = settings.Address, Host = settings.EmailHost, Port = settings.Port, Username = settings.Username, Alert = settings.Alert, Password = settings.Password };
var hdd = settings.AlertRules.FirstOrDefault(x => x.AlertType == AlertTypeDto.Hdd);
if (hdd != null)
{
Enabled = hdd.Enabled;
HddId = hdd.DriveId;
Notifier.NotificationSettings = new NotificationSettings { PercentageLimit = hdd.Percentage, Enabled = hdd.Enabled, ThresholdTime = hdd.ThresholdTime };
}
Logger.Trace("Storage enabled: {0}", Enabled);
Notifier.Interval = c.Intervals.CriticalNotification;
Logger.Trace(settings.DumpJson().ToString());
Logger.Trace("Settings Refreshed");
}
protected abstract void RefreshSettings(Configuration c);
protected abstract void RefreshSettings(Configuration c);
