private bool RefreshRepository()
{
lock (this.cache)
{
var alarmList = this.repository.Load();
if (alarmList == null)
{
return(false);
}
var alarms = alarmList.ToDictionary(x => x.Id);
var deletedAlarmKeys = this.cache.Keys.Where(x => !alarms.ContainsKey(x)).ToArray();
foreach (var key in deletedAlarmKeys)
{
if (this.OnAlarmRemoval != null)
{
this.OnAlarmRemoval.Invoke(this, new AlarmEventArgs(this.cache[key]));
}
this.cache.Remove(key);
}
foreach (var alarm in alarms.Values)
{
IAlarm cachedAlarm = null;
if (this.cache.TryGetValue(alarm.Id, out cachedAlarm))
{
if (!this.valueComparer.Equals(cachedAlarm, alarm))
{
cachedAlarm.Import(alarm);
if (this.OnAlarmUpdate != null)
{
this.OnAlarmUpdate.Invoke(this, new AlarmEventArgs(cachedAlarm));
}
}
}
else
{
cachedAlarm = alarm;
this.cache.Add(alarm.Id, cachedAlarm);
if (this.OnAlarmAdd != null)
{
this.OnAlarmAdd.Invoke(this, new AlarmEventArgs(cachedAlarm));
}
}
this.CheckAlarmStatus(cachedAlarm);
}
return(true);
}
}