| | | 1 | | using System; |
| | | 2 | | using System.Linq; |
| | | 3 | | using System.Threading; |
| | | 4 | | using MediaBrowser.Model.Tasks; |
| | | 5 | | using Microsoft.Extensions.Logging; |
| | | 6 | | |
| | | 7 | | namespace Emby.Server.Implementations.ScheduledTasks.Triggers |
| | | 8 | | { |
| | | 9 | | /// <summary> |
| | | 10 | | /// Represents a task trigger that runs repeatedly on an interval. |
| | | 11 | | /// </summary> |
| | | 12 | | public sealed class IntervalTrigger : ITaskTrigger, IDisposable |
| | | 13 | | { |
| | | 14 | | private readonly TimeSpan _interval; |
| | | 15 | | private DateTime _lastStartDate; |
| | | 16 | | private Timer? _timer; |
| | | 17 | | private bool _disposed = false; |
| | | 18 | | |
| | | 19 | | /// <summary> |
| | | 20 | | /// Initializes a new instance of the <see cref="IntervalTrigger"/> class. |
| | | 21 | | /// </summary> |
| | | 22 | | /// <param name="interval">The interval.</param> |
| | | 23 | | /// <param name="taskOptions">The options of this task.</param> |
| | | 24 | | public IntervalTrigger(TimeSpan interval, TaskOptions taskOptions) |
| | | 25 | | { |
| | 273 | 26 | | _interval = interval; |
| | | 27 | | TaskOptions = taskOptions; |
| | 273 | 28 | | } |
| | | 29 | | |
| | | 30 | | /// <inheritdoc /> |
| | | 31 | | public event EventHandler<EventArgs>? Triggered; |
| | | 32 | | |
| | | 33 | | /// <inheritdoc /> |
| | | 34 | | public TaskOptions TaskOptions { get; } |
| | | 35 | | |
| | | 36 | | /// <inheritdoc /> |
| | | 37 | | public void Start(TaskResult? lastResult, ILogger logger, string taskName, bool isApplicationStartup) |
| | | 38 | | { |
| | 273 | 39 | | DisposeTimer(); |
| | | 40 | | |
| | 273 | 41 | | DateTime now = DateTime.UtcNow; |
| | | 42 | | DateTime triggerDate; |
| | | 43 | | |
| | 273 | 44 | | if (lastResult is null) |
| | | 45 | | { |
| | | 46 | | // Task has never been completed before |
| | 273 | 47 | | triggerDate = now.AddHours(1); |
| | | 48 | | } |
| | | 49 | | else |
| | | 50 | | { |
| | 0 | 51 | | triggerDate = new[] { lastResult.EndTimeUtc, _lastStartDate, now.AddMinutes(1) }.Max().Add(_interval); |
| | | 52 | | } |
| | | 53 | | |
| | 273 | 54 | | var dueTime = triggerDate - now; |
| | 273 | 55 | | var maxDueTime = TimeSpan.FromDays(7); |
| | | 56 | | |
| | 273 | 57 | | if (dueTime > maxDueTime) |
| | | 58 | | { |
| | 0 | 59 | | dueTime = maxDueTime; |
| | | 60 | | } |
| | | 61 | | |
| | 273 | 62 | | _timer = new Timer(_ => OnTriggered(), null, dueTime, TimeSpan.FromMilliseconds(-1)); |
| | 273 | 63 | | } |
| | | 64 | | |
| | | 65 | | /// <inheritdoc /> |
| | | 66 | | public void Stop() |
| | | 67 | | { |
| | 546 | 68 | | DisposeTimer(); |
| | 546 | 69 | | } |
| | | 70 | | |
| | | 71 | | /// <summary> |
| | | 72 | | /// Disposes the timer. |
| | | 73 | | /// </summary> |
| | | 74 | | private void DisposeTimer() |
| | | 75 | | { |
| | 1092 | 76 | | _timer?.Dispose(); |
| | 1092 | 77 | | _timer = null; |
| | 1092 | 78 | | } |
| | | 79 | | |
| | | 80 | | /// <summary> |
| | | 81 | | /// Called when [triggered]. |
| | | 82 | | /// </summary> |
| | | 83 | | private void OnTriggered() |
| | | 84 | | { |
| | 0 | 85 | | DisposeTimer(); |
| | | 86 | | |
| | 0 | 87 | | if (Triggered is not null) |
| | | 88 | | { |
| | 0 | 89 | | _lastStartDate = DateTime.UtcNow; |
| | 0 | 90 | | Triggered(this, EventArgs.Empty); |
| | | 91 | | } |
| | 0 | 92 | | } |
| | | 93 | | |
| | | 94 | | /// <inheritdoc /> |
| | | 95 | | public void Dispose() |
| | | 96 | | { |
| | 273 | 97 | | if (_disposed) |
| | | 98 | | { |
| | 0 | 99 | | return; |
| | | 100 | | } |
| | | 101 | | |
| | 273 | 102 | | DisposeTimer(); |
| | | 103 | | |
| | 273 | 104 | | _disposed = true; |
| | 273 | 105 | | } |
| | | 106 | | } |
| | | 107 | | } |