745 lines
25 KiB
C#
745 lines
25 KiB
C#
#nullable disable
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#pragma warning disable CS1591
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using System;
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using System.Globalization;
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using System.IO;
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using System.Linq;
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using System.Text.Json;
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using System.Threading;
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using System.Threading.Tasks;
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using Emby.Server.Implementations.ScheduledTasks.Triggers;
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using Jellyfin.Data.Events;
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using Jellyfin.Extensions.Json;
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using MediaBrowser.Common.Configuration;
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using MediaBrowser.Common.Extensions;
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using MediaBrowser.Model.Tasks;
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using Microsoft.Extensions.Logging;
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namespace Emby.Server.Implementations.ScheduledTasks
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{
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/// <summary>
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/// Class ScheduledTaskWorker.
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/// </summary>
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public class ScheduledTaskWorker : IScheduledTaskWorker
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{
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/// <summary>
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/// The options for the json Serializer.
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/// </summary>
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private readonly JsonSerializerOptions _jsonOptions = JsonDefaults.Options;
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/// <summary>
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/// Gets or sets the application paths.
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/// </summary>
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/// <value>The application paths.</value>
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private readonly IApplicationPaths _applicationPaths;
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/// <summary>
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/// Gets or sets the logger.
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/// </summary>
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/// <value>The logger.</value>
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private readonly ILogger _logger;
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/// <summary>
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/// Gets or sets the task manager.
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/// </summary>
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/// <value>The task manager.</value>
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private readonly ITaskManager _taskManager;
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/// <summary>
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/// The _last execution result sync lock.
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/// </summary>
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private readonly object _lastExecutionResultSyncLock = new object();
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private bool _readFromFile = false;
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/// <summary>
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/// The _last execution result.
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/// </summary>
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private TaskResult _lastExecutionResult;
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private Task _currentTask;
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/// <summary>
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/// The _triggers.
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/// </summary>
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private Tuple<TaskTriggerInfo, ITaskTrigger>[] _triggers;
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/// <summary>
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/// The _id.
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/// </summary>
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private string _id;
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/// <summary>
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/// Initializes a new instance of the <see cref="ScheduledTaskWorker" /> class.
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/// </summary>
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/// <param name="scheduledTask">The scheduled task.</param>
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/// <param name="applicationPaths">The application paths.</param>
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/// <param name="taskManager">The task manager.</param>
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/// <param name="logger">The logger.</param>
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/// <exception cref="ArgumentNullException">
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/// scheduledTask
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/// or
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/// applicationPaths
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/// or
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/// taskManager
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/// or
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/// jsonSerializer
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/// or
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/// logger.
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/// </exception>
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public ScheduledTaskWorker(IScheduledTask scheduledTask, IApplicationPaths applicationPaths, ITaskManager taskManager, ILogger logger)
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{
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ArgumentNullException.ThrowIfNull(scheduledTask);
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ArgumentNullException.ThrowIfNull(applicationPaths);
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ArgumentNullException.ThrowIfNull(taskManager);
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ArgumentNullException.ThrowIfNull(logger);
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ScheduledTask = scheduledTask;
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_applicationPaths = applicationPaths;
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_taskManager = taskManager;
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_logger = logger;
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InitTriggerEvents();
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}
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public event EventHandler<GenericEventArgs<double>> TaskProgress;
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/// <summary>
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/// Gets the scheduled task.
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/// </summary>
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/// <value>The scheduled task.</value>
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public IScheduledTask ScheduledTask { get; private set; }
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/// <summary>
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/// Gets the last execution result.
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/// </summary>
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/// <value>The last execution result.</value>
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public TaskResult LastExecutionResult
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{
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get
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{
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var path = GetHistoryFilePath();
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lock (_lastExecutionResultSyncLock)
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{
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if (_lastExecutionResult is null && !_readFromFile)
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{
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if (File.Exists(path))
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{
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var bytes = File.ReadAllBytes(path);
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if (bytes.Length > 0)
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{
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try
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{
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_lastExecutionResult = JsonSerializer.Deserialize<TaskResult>(bytes, _jsonOptions);
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}
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catch (JsonException ex)
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{
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_logger.LogError(ex, "Error deserializing {File}", path);
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}
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}
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else
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{
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_logger.LogDebug("Scheduled Task history file {Path} is empty. Skipping deserialization.", path);
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}
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}
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_readFromFile = true;
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}
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}
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return _lastExecutionResult;
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}
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private set
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{
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_lastExecutionResult = value;
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var path = GetHistoryFilePath();
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Directory.CreateDirectory(Path.GetDirectoryName(path));
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lock (_lastExecutionResultSyncLock)
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{
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using FileStream createStream = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.None);
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using Utf8JsonWriter jsonStream = new Utf8JsonWriter(createStream);
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JsonSerializer.Serialize(jsonStream, value, _jsonOptions);
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}
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}
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}
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/// <summary>
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/// Gets the name.
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/// </summary>
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/// <value>The name.</value>
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public string Name => ScheduledTask.Name;
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/// <summary>
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/// Gets the description.
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/// </summary>
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/// <value>The description.</value>
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public string Description => ScheduledTask.Description;
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/// <summary>
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/// Gets the category.
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/// </summary>
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/// <value>The category.</value>
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public string Category => ScheduledTask.Category;
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/// <summary>
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/// Gets or sets the current cancellation token.
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/// </summary>
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/// <value>The current cancellation token source.</value>
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private CancellationTokenSource CurrentCancellationTokenSource { get; set; }
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/// <summary>
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/// Gets or sets the current execution start time.
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/// </summary>
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/// <value>The current execution start time.</value>
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private DateTime CurrentExecutionStartTime { get; set; }
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/// <summary>
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/// Gets the state.
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/// </summary>
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/// <value>The state.</value>
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public TaskState State
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{
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get
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{
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if (CurrentCancellationTokenSource is not null)
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{
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return CurrentCancellationTokenSource.IsCancellationRequested
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? TaskState.Cancelling
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: TaskState.Running;
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}
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return TaskState.Idle;
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}
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}
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/// <summary>
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/// Gets the current progress.
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/// </summary>
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/// <value>The current progress.</value>
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public double? CurrentProgress { get; private set; }
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/// <summary>
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/// Gets or sets the triggers that define when the task will run.
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/// </summary>
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/// <value>The triggers.</value>
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private Tuple<TaskTriggerInfo, ITaskTrigger>[] InternalTriggers
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{
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get => _triggers;
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set
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{
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ArgumentNullException.ThrowIfNull(value);
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// Cleanup current triggers
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if (_triggers is not null)
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{
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DisposeTriggers();
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}
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_triggers = value.ToArray();
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ReloadTriggerEvents(false);
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}
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}
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/// <summary>
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/// Gets or sets the triggers that define when the task will run.
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/// </summary>
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/// <value>The triggers.</value>
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/// <exception cref="ArgumentNullException"><c>value</c> is <c>null</c>.</exception>
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public TaskTriggerInfo[] Triggers
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{
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get
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{
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return Array.ConvertAll(InternalTriggers, i => i.Item1);
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}
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set
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{
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ArgumentNullException.ThrowIfNull(value);
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// This null check is not great, but is needed to handle bad user input, or user mucking with the config file incorrectly
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var triggerList = value.Where(i => i is not null).ToArray();
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SaveTriggers(triggerList);
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InternalTriggers = Array.ConvertAll(triggerList, i => new Tuple<TaskTriggerInfo, ITaskTrigger>(i, GetTrigger(i)));
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}
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}
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/// <summary>
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/// Gets the unique id.
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/// </summary>
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/// <value>The unique id.</value>
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public string Id
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{
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get
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{
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return _id ??= ScheduledTask.GetType().FullName.GetMD5().ToString("N", CultureInfo.InvariantCulture);
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}
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}
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private void InitTriggerEvents()
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{
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_triggers = LoadTriggers();
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ReloadTriggerEvents(true);
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}
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public void ReloadTriggerEvents()
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{
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ReloadTriggerEvents(false);
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}
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/// <summary>
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/// Reloads the trigger events.
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/// </summary>
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/// <param name="isApplicationStartup">if set to <c>true</c> [is application startup].</param>
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private void ReloadTriggerEvents(bool isApplicationStartup)
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{
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foreach (var triggerInfo in InternalTriggers)
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{
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var trigger = triggerInfo.Item2;
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trigger.Stop();
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trigger.Triggered -= OnTriggerTriggered;
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trigger.Triggered += OnTriggerTriggered;
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trigger.Start(LastExecutionResult, _logger, Name, isApplicationStartup);
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}
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}
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/// <summary>
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/// Handles the Triggered event of the trigger control.
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/// </summary>
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/// <param name="sender">The source of the event.</param>
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/// <param name="e">The <see cref="EventArgs" /> instance containing the event data.</param>
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private async void OnTriggerTriggered(object sender, EventArgs e)
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{
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var trigger = (ITaskTrigger)sender;
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if (ScheduledTask is IConfigurableScheduledTask configurableTask && !configurableTask.IsEnabled)
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{
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return;
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}
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_logger.LogDebug("{0} fired for task: {1}", trigger.GetType().Name, Name);
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trigger.Stop();
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_taskManager.QueueScheduledTask(ScheduledTask, trigger.TaskOptions);
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await Task.Delay(1000).ConfigureAwait(false);
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trigger.Start(LastExecutionResult, _logger, Name, false);
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}
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/// <summary>
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/// Executes the task.
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/// </summary>
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/// <param name="options">Task options.</param>
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/// <returns>Task.</returns>
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/// <exception cref="InvalidOperationException">Cannot execute a Task that is already running.</exception>
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public async Task Execute(TaskOptions options)
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{
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var task = Task.Run(async () => await ExecuteInternal(options).ConfigureAwait(false));
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_currentTask = task;
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try
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{
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await task.ConfigureAwait(false);
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}
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finally
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{
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_currentTask = null;
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GC.Collect();
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}
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}
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private async Task ExecuteInternal(TaskOptions options)
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{
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// Cancel the current execution, if any
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if (CurrentCancellationTokenSource is not null)
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{
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throw new InvalidOperationException("Cannot execute a Task that is already running");
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}
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var progress = new Progress<double>();
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CurrentCancellationTokenSource = new CancellationTokenSource();
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_logger.LogDebug("Executing {0}", Name);
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((TaskManager)_taskManager).OnTaskExecuting(this);
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progress.ProgressChanged += OnProgressChanged;
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TaskCompletionStatus status;
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CurrentExecutionStartTime = DateTime.UtcNow;
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Exception failureException = null;
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try
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{
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if (options is not null && options.MaxRuntimeTicks.HasValue)
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{
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CurrentCancellationTokenSource.CancelAfter(TimeSpan.FromTicks(options.MaxRuntimeTicks.Value));
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}
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await ScheduledTask.ExecuteAsync(progress, CurrentCancellationTokenSource.Token).ConfigureAwait(false);
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status = TaskCompletionStatus.Completed;
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}
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catch (OperationCanceledException)
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{
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status = TaskCompletionStatus.Cancelled;
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Error executing Scheduled Task");
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failureException = ex;
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status = TaskCompletionStatus.Failed;
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}
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var startTime = CurrentExecutionStartTime;
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var endTime = DateTime.UtcNow;
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progress.ProgressChanged -= OnProgressChanged;
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CurrentCancellationTokenSource.Dispose();
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CurrentCancellationTokenSource = null;
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CurrentProgress = null;
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OnTaskCompleted(startTime, endTime, status, failureException);
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}
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/// <summary>
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/// Progress_s the progress changed.
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/// </summary>
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/// <param name="sender">The sender.</param>
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/// <param name="e">The e.</param>
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private void OnProgressChanged(object sender, double e)
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{
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e = Math.Min(e, 100);
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CurrentProgress = e;
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TaskProgress?.Invoke(this, new GenericEventArgs<double>(e));
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}
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/// <summary>
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/// Stops the task if it is currently executing.
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/// </summary>
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/// <exception cref="InvalidOperationException">Cannot cancel a Task unless it is in the Running state.</exception>
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public void Cancel()
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{
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if (State != TaskState.Running)
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{
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throw new InvalidOperationException("Cannot cancel a Task unless it is in the Running state.");
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}
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CancelIfRunning();
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}
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/// <summary>
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/// Cancels if running.
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/// </summary>
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public void CancelIfRunning()
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{
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if (State == TaskState.Running)
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{
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_logger.LogInformation("Attempting to cancel Scheduled Task {0}", Name);
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CurrentCancellationTokenSource.Cancel();
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}
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}
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/// <summary>
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/// Gets the scheduled tasks configuration directory.
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/// </summary>
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/// <returns>System.String.</returns>
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private string GetScheduledTasksConfigurationDirectory()
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{
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return Path.Combine(_applicationPaths.ConfigurationDirectoryPath, "ScheduledTasks");
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}
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/// <summary>
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/// Gets the scheduled tasks data directory.
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/// </summary>
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/// <returns>System.String.</returns>
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private string GetScheduledTasksDataDirectory()
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{
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return Path.Combine(_applicationPaths.DataPath, "ScheduledTasks");
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}
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/// <summary>
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/// Gets the history file path.
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/// </summary>
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/// <value>The history file path.</value>
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private string GetHistoryFilePath()
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{
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return Path.Combine(GetScheduledTasksDataDirectory(), new Guid(Id) + ".js");
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}
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/// <summary>
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/// Gets the configuration file path.
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/// </summary>
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/// <returns>System.String.</returns>
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private string GetConfigurationFilePath()
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{
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return Path.Combine(GetScheduledTasksConfigurationDirectory(), new Guid(Id) + ".js");
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}
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/// <summary>
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/// Loads the triggers.
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/// </summary>
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/// <returns>IEnumerable{BaseTaskTrigger}.</returns>
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private Tuple<TaskTriggerInfo, ITaskTrigger>[] LoadTriggers()
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{
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// This null check is not great, but is needed to handle bad user input, or user mucking with the config file incorrectly
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var settings = LoadTriggerSettings().Where(i => i is not null);
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return settings.Select(i => new Tuple<TaskTriggerInfo, ITaskTrigger>(i, GetTrigger(i))).ToArray();
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}
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private TaskTriggerInfo[] LoadTriggerSettings()
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{
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string path = GetConfigurationFilePath();
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TaskTriggerInfo[] list = null;
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if (File.Exists(path))
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{
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var bytes = File.ReadAllBytes(path);
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list = JsonSerializer.Deserialize<TaskTriggerInfo[]>(bytes, _jsonOptions);
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}
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// Return defaults if file doesn't exist.
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return list ?? GetDefaultTriggers();
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}
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private TaskTriggerInfo[] GetDefaultTriggers()
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{
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try
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{
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return ScheduledTask.GetDefaultTriggers().ToArray();
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}
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catch
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{
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return new TaskTriggerInfo[]
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{
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new TaskTriggerInfo
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{
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IntervalTicks = TimeSpan.FromDays(1).Ticks,
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Type = TaskTriggerInfo.TriggerInterval
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}
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};
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}
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}
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/// <summary>
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/// Saves the triggers.
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/// </summary>
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/// <param name="triggers">The triggers.</param>
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private void SaveTriggers(TaskTriggerInfo[] triggers)
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{
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var path = GetConfigurationFilePath();
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Directory.CreateDirectory(Path.GetDirectoryName(path));
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using FileStream createStream = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.None);
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using Utf8JsonWriter jsonWriter = new Utf8JsonWriter(createStream);
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JsonSerializer.Serialize(jsonWriter, triggers, _jsonOptions);
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}
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/// <summary>
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/// Called when [task completed].
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/// </summary>
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/// <param name="startTime">The start time.</param>
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/// <param name="endTime">The end time.</param>
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/// <param name="status">The status.</param>
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/// <param name="ex">The exception.</param>
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private void OnTaskCompleted(DateTime startTime, DateTime endTime, TaskCompletionStatus status, Exception ex)
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{
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var elapsedTime = endTime - startTime;
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_logger.LogInformation("{0} {1} after {2} minute(s) and {3} seconds", Name, status, Math.Truncate(elapsedTime.TotalMinutes), elapsedTime.Seconds);
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var result = new TaskResult
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{
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StartTimeUtc = startTime,
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EndTimeUtc = endTime,
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Status = status,
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Name = Name,
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Id = Id
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};
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result.Key = ScheduledTask.Key;
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if (ex is not null)
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{
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result.ErrorMessage = ex.Message;
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result.LongErrorMessage = ex.StackTrace;
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}
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LastExecutionResult = result;
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((TaskManager)_taskManager).OnTaskCompleted(this, result);
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}
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/// <summary>
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/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
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/// </summary>
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public void Dispose()
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{
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Dispose(true);
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|
GC.SuppressFinalize(this);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Releases unmanaged and - optionally - managed resources.
|
|
/// </summary>
|
|
/// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
|
|
protected virtual void Dispose(bool dispose)
|
|
{
|
|
if (dispose)
|
|
{
|
|
DisposeTriggers();
|
|
|
|
var wassRunning = State == TaskState.Running;
|
|
var startTime = CurrentExecutionStartTime;
|
|
|
|
var token = CurrentCancellationTokenSource;
|
|
if (token is not null)
|
|
{
|
|
try
|
|
{
|
|
_logger.LogInformation("{Name}: Cancelling", Name);
|
|
token.Cancel();
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
_logger.LogError(ex, "Error calling CancellationToken.Cancel();");
|
|
}
|
|
}
|
|
|
|
var task = _currentTask;
|
|
if (task is not null)
|
|
{
|
|
try
|
|
{
|
|
_logger.LogInformation("{Name}: Waiting on Task", Name);
|
|
var exited = task.Wait(2000);
|
|
|
|
if (exited)
|
|
{
|
|
_logger.LogInformation("{Name}: Task exited", Name);
|
|
}
|
|
else
|
|
{
|
|
_logger.LogInformation("{Name}: Timed out waiting for task to stop", Name);
|
|
}
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
_logger.LogError(ex, "Error calling Task.WaitAll();");
|
|
}
|
|
}
|
|
|
|
if (token is not null)
|
|
{
|
|
try
|
|
{
|
|
_logger.LogDebug("{Name}: Disposing CancellationToken", Name);
|
|
token.Dispose();
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
_logger.LogError(ex, "Error calling CancellationToken.Dispose();");
|
|
}
|
|
}
|
|
|
|
if (wassRunning)
|
|
{
|
|
OnTaskCompleted(startTime, DateTime.UtcNow, TaskCompletionStatus.Aborted, null);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Converts a TaskTriggerInfo into a concrete BaseTaskTrigger.
|
|
/// </summary>
|
|
/// <param name="info">The info.</param>
|
|
/// <returns>BaseTaskTrigger.</returns>
|
|
/// <exception cref="ArgumentException">Invalid trigger type: + info.Type.</exception>
|
|
private ITaskTrigger GetTrigger(TaskTriggerInfo info)
|
|
{
|
|
var options = new TaskOptions
|
|
{
|
|
MaxRuntimeTicks = info.MaxRuntimeTicks
|
|
};
|
|
|
|
if (info.Type.Equals(nameof(DailyTrigger), StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
if (!info.TimeOfDayTicks.HasValue)
|
|
{
|
|
throw new ArgumentException("Info did not contain a TimeOfDayTicks.", nameof(info));
|
|
}
|
|
|
|
return new DailyTrigger(TimeSpan.FromTicks(info.TimeOfDayTicks.Value), options);
|
|
}
|
|
|
|
if (info.Type.Equals(nameof(WeeklyTrigger), StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
if (!info.TimeOfDayTicks.HasValue)
|
|
{
|
|
throw new ArgumentException("Info did not contain a TimeOfDayTicks.", nameof(info));
|
|
}
|
|
|
|
if (!info.DayOfWeek.HasValue)
|
|
{
|
|
throw new ArgumentException("Info did not contain a DayOfWeek.", nameof(info));
|
|
}
|
|
|
|
return new WeeklyTrigger(TimeSpan.FromTicks(info.TimeOfDayTicks.Value), info.DayOfWeek.Value, options);
|
|
}
|
|
|
|
if (info.Type.Equals(nameof(IntervalTrigger), StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
if (!info.IntervalTicks.HasValue)
|
|
{
|
|
throw new ArgumentException("Info did not contain a IntervalTicks.", nameof(info));
|
|
}
|
|
|
|
return new IntervalTrigger(TimeSpan.FromTicks(info.IntervalTicks.Value), options);
|
|
}
|
|
|
|
if (info.Type.Equals(nameof(StartupTrigger), StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return new StartupTrigger(options);
|
|
}
|
|
|
|
throw new ArgumentException("Unrecognized trigger type: " + info.Type);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Disposes each trigger.
|
|
/// </summary>
|
|
private void DisposeTriggers()
|
|
{
|
|
foreach (var triggerInfo in InternalTriggers)
|
|
{
|
|
var trigger = triggerInfo.Item2;
|
|
trigger.Triggered -= OnTriggerTriggered;
|
|
trigger.Stop();
|
|
if (trigger is IDisposable disposable)
|
|
{
|
|
disposable.Dispose();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|