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annotate ServerMonitor/Objects/Schedule.cs @ 14:2db36ab759de

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author Brad Greco <brad@bgreco.net>
date Mon, 22 Apr 2019 21:10:42 -0400
parents d92176c5398a
children 68d7834dc28e
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0
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1 using System;
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2
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3 namespace ServerMonitorApp
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4 {
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5 public class Schedule
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6 {
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7 public Schedule() { }
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8
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9 public Schedule(FrequencyUnits units, int frequency, TimeSpan startTime, TimeSpan endTime)
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10 {
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11 Units = units;
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12 Frequency = frequency;
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13 StartTime = startTime;
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14 EndTime = endTime;
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15 }
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16
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17 public int Frequency { get; set; }
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18
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19 public FrequencyUnits Units { get; set; }
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20
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21 public TimeSpan StartTime { get; set; }
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22
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23 public TimeSpan EndTime { get; set; }
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24
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25 public DateTime GetNextTime(DateTime lastScheduledTime)
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26 {
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27 return GetNextTime(lastScheduledTime, DateTime.Now);
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28 }
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29
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30 public DateTime GetNextTime(DateTime lastScheduledTime, DateTime minStartTime)
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31 {
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32 DateTime nextTime = lastScheduledTime;
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33 if (Units == FrequencyUnits.Day)
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34 {
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35 while (nextTime < minStartTime)
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36 nextTime = nextTime.AddDays(Frequency).Date.Add(StartTime);
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37 }
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38 else
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39 {
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40 // If the last run time was more than a day ago, fast-forward to reduce the number of loops
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41 if (nextTime < minStartTime.AddHours(-24))
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42 nextTime = minStartTime.Date.Add(StartTime).AddHours(-24);
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43 while (nextTime < minStartTime)
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44 {
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45 switch (Units)
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46 {
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47 case FrequencyUnits.Second: nextTime = nextTime.AddSeconds(Frequency); break;
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48 case FrequencyUnits.Minute: nextTime = nextTime.AddMinutes(Frequency); break;
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49 case FrequencyUnits.Hour: nextTime = nextTime.AddHours(Frequency); break;
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50 default: throw new InvalidOperationException("Unexpected frequency units: " + Units);
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51 }
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52 }
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53 if (StartTime < EndTime)
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54 {
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55 if (nextTime.TimeOfDay < StartTime)
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56 nextTime = nextTime.Date + StartTime;
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57 else if (nextTime.TimeOfDay > EndTime)
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58 nextTime = nextTime.Date.AddDays(1) + StartTime;
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59 }
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60 else if (nextTime.TimeOfDay > EndTime && nextTime.TimeOfDay < StartTime)
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61 {
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62 nextTime = nextTime.Date + StartTime;
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63 }
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64 }
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65 return nextTime;
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66 }
12
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67
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68 public override string ToString()
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69 {
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70 return string.Format("Every {0} {1}", Frequency, Units.ToString().ToLower() + (Frequency == 1 ? "" : "s"));
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71 }
0
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72 }
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73
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74 public enum FrequencyUnits { Second, Minute, Hour, Day }
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75 }