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> The OpenWrite method opens a file if one already exists for the file path, or creates a new file if one does not exist. For an existing file, it does not append the new text to the existing text. Instead, it overwrites the existing characters with the new characters. If you overwrite a longer string (such as "This is a test of the OpenWrite method") with a shorter string (such as "Second run"), the file will contain a mix of the strings ("Second runtest of the OpenWrite method"). Ref: https://docs.microsoft.com/en-us/dotnet/api/system.io.file.openwrite?view=net-5.0#remarks
780 lines
25 KiB
C#
780 lines
25 KiB
C#
#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;
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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 Jellyfin.Data.Events;
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using MediaBrowser.Common.Configuration;
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using MediaBrowser.Common.Extensions;
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using MediaBrowser.Common.Json;
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using MediaBrowser.Common.Progress;
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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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/// 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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/// The options for the json Serializer.
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/// </summary>
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private readonly JsonSerializerOptions _jsonOptions = JsonDefaults.GetOptions();
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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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if (scheduledTask == null)
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{
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throw new ArgumentNullException(nameof(scheduledTask));
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}
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if (applicationPaths == null)
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{
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throw new ArgumentNullException(nameof(applicationPaths));
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}
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if (taskManager == null)
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{
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throw new ArgumentNullException(nameof(taskManager));
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}
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if (logger == null)
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{
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throw new ArgumentNullException(nameof(logger));
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}
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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 == null && !_readFromFile)
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{
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if (File.Exists(path))
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{
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try
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{
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var jsonString = File.ReadAllText(path, Encoding.UTF8);
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if (!string.IsNullOrWhiteSpace(jsonString))
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{
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_lastExecutionResult = JsonSerializer.Deserialize<TaskResult>(jsonString, _jsonOptions);
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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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catch (Exception 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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_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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JsonSerializer.SerializeAsync(createStream, 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 != 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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if (value == null)
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{
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throw new ArgumentNullException(nameof(value));
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}
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// Cleanup current triggers
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if (_triggers != 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 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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var triggers = InternalTriggers;
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return triggers.Select(i => i.Item1).ToArray();
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}
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set
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{
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if (value == null)
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{
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throw new ArgumentNullException(nameof(value));
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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 triggerList = value.Where(i => i != null).ToArray();
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SaveTriggers(triggerList);
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InternalTriggers = triggerList.Select(i => new Tuple<TaskTriggerInfo, ITaskTrigger>(i, GetTrigger(i))).ToArray();
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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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if (_id == null)
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{
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_id = ScheduledTask.GetType().FullName.GetMD5().ToString("N", CultureInfo.InvariantCulture);
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}
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return _id;
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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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var configurableTask = ScheduledTask as IConfigurableScheduledTask;
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if (configurableTask != null && !configurableTask.IsEnabled)
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{
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return;
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}
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_logger.LogInformation("{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 != 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 SimpleProgress<double>();
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CurrentCancellationTokenSource = new CancellationTokenSource();
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_logger.LogInformation("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 != 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.Execute(CurrentCancellationTokenSource.Token, progress).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");
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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 != null).ToArray();
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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 jsonString = File.ReadAllText(path, Encoding.UTF8);
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list = JsonSerializer.Deserialize<TaskTriggerInfo[]>(jsonString, _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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JsonSerializer.SerializeAsync(createStream, 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)
|
|
{
|
|
var elapsedTime = endTime - startTime;
|
|
|
|
_logger.LogInformation("{0} {1} after {2} minute(s) and {3} seconds", Name, status, Math.Truncate(elapsedTime.TotalMinutes), elapsedTime.Seconds);
|
|
|
|
var result = new TaskResult
|
|
{
|
|
StartTimeUtc = startTime,
|
|
EndTimeUtc = endTime,
|
|
Status = status,
|
|
Name = Name,
|
|
Id = Id
|
|
};
|
|
|
|
result.Key = ScheduledTask.Key;
|
|
|
|
if (ex != null)
|
|
{
|
|
result.ErrorMessage = ex.Message;
|
|
result.LongErrorMessage = ex.StackTrace;
|
|
}
|
|
|
|
LastExecutionResult = result;
|
|
|
|
((TaskManager)_taskManager).OnTaskCompleted(this, result);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
|
|
/// </summary>
|
|
public void Dispose()
|
|
{
|
|
Dispose(true);
|
|
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 != null)
|
|
{
|
|
try
|
|
{
|
|
_logger.LogInformation(Name + ": Cancelling");
|
|
token.Cancel();
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
_logger.LogError(ex, "Error calling CancellationToken.Cancel();");
|
|
}
|
|
}
|
|
|
|
var task = _currentTask;
|
|
if (task != null)
|
|
{
|
|
try
|
|
{
|
|
_logger.LogInformation(Name + ": Waiting on Task");
|
|
var exited = task.Wait(2000);
|
|
|
|
if (exited)
|
|
{
|
|
_logger.LogInformation(Name + ": Task exited");
|
|
}
|
|
else
|
|
{
|
|
_logger.LogInformation(Name + ": Timed out waiting for task to stop");
|
|
}
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
_logger.LogError(ex, "Error calling Task.WaitAll();");
|
|
}
|
|
}
|
|
|
|
if (token != null)
|
|
{
|
|
try
|
|
{
|
|
_logger.LogDebug(Name + ": Disposing CancellationToken");
|
|
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
|
|
{
|
|
TimeOfDay = TimeSpan.FromTicks(info.TimeOfDayTicks.Value),
|
|
TaskOptions = 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
|
|
{
|
|
TimeOfDay = TimeSpan.FromTicks(info.TimeOfDayTicks.Value),
|
|
DayOfWeek = info.DayOfWeek.Value,
|
|
TaskOptions = 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
|
|
{
|
|
Interval = TimeSpan.FromTicks(info.IntervalTicks.Value),
|
|
TaskOptions = options
|
|
};
|
|
}
|
|
|
|
if (info.Type.Equals(nameof(StartupTrigger), StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
return new StartupTrigger();
|
|
}
|
|
|
|
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();
|
|
}
|
|
}
|
|
}
|
|
}
|