/// <summary>
/// Runs looped formatted messages until the timer runs out
/// </summary>
/// <param name="shutdownDelay">Total amount of message time</param>
/// <param name="shutdownAnnouncement">What to announce</param>
/// <param name="shutdownAnnouncementFrequency">How often to announce it</param>
private static async void RunAnnouncements(int shutdownDelay, string shutdownAnnouncement, int shutdownAnnouncementFrequency)
{
int secondsLeftBeforeShutdown = shutdownDelay;
while (secondsLeftBeforeShutdown > 0)
{
SystemComm.BroadcastToAll(String.Format(shutdownAnnouncement, secondsLeftBeforeShutdown));
await Task.Delay(shutdownAnnouncementFrequency * 1000);
secondsLeftBeforeShutdown -= shutdownAnnouncementFrequency;
}
}
/// <summary>
/// Tries to shutdown an existing loop
/// </summary>
/// <param name="designator">what the loop is called</param>
/// <param name="shutdownDelay">In # of Seconds - how long to wait before cancelling it</param>
/// <param name="shutdownAnnouncementFrequency">In # of Seconds - how often to announce the shutdown, <= 0 is only one announcement</param>
/// <param name="shutdownAnnouncement">What to announce (string.format format) before shutting down, empty string = no announcements, ex "World shutting down in {0} seconds."</param>
public static void ShutdownLoop(string designator, int shutdownDelay, string shutdownAnnouncement, int shutdownAnnouncementFrequency = -1)
{
var cancelToken = GetCancellationToken(designator);
if (cancelToken != null && cancelToken.Token.CanBeCanceled)
{
cancelToken.CancelAfter(shutdownDelay * 1000);
}
if (!string.IsNullOrWhiteSpace(shutdownAnnouncement))
{
SystemComm.BroadcastToAll(String.Format(shutdownAnnouncement, shutdownDelay));
}
if (shutdownAnnouncementFrequency > 0)
{
Task.Run(() => RunAnnouncements(shutdownDelay, shutdownAnnouncement, shutdownAnnouncementFrequency));
}
}
/// <summary>
/// Cancel ALL the current loops
/// </summary>
/// <param name="shutdownDelay">In # of Seconds - how long to wait before cancelling it</param>
/// <param name="shutdownAnnouncementFrequency">In # of Seconds - how often to announce the shutdown, < = 0 is only one announcement</param>
/// <param name="shutdownAnnouncement">What to announce (string.format format) before shutting down, empty string = no announcements</param>
public static void ShutdownAll(int shutdownDelay, string shutdownAnnouncement, int shutdownAnnouncementFrequency = -1)
{
IEnumerable <CancellationTokenSource> tokens
= globalCache.Where(kvp => kvp.Value.GetType() == typeof(CancellationTokenSource)).Select(kvp => (CancellationTokenSource)kvp.Value);
foreach (var token in tokens.Where(tk => !tk.IsCancellationRequested && tk.Token.CanBeCanceled))
{
if (token != null)
{
token.CancelAfter(shutdownDelay * 1000);
}
}
if (!string.IsNullOrWhiteSpace(shutdownAnnouncement))
{
SystemComm.BroadcastToAll(String.Format(shutdownAnnouncement, shutdownDelay));
}
if (shutdownAnnouncementFrequency > 0)
{
Task.Run(() => RunAnnouncements(shutdownDelay, shutdownAnnouncement, shutdownAnnouncementFrequency));
}
}