jellyfin/MediaBrowser.Common.Implementations/ScheduledTasks/Tasks/DeleteCacheFileTask.cs

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using MediaBrowser.Common.Configuration;
using MediaBrowser.Common.IO;
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using MediaBrowser.Common.ScheduledTasks;
using MediaBrowser.Model.Logging;
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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
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namespace MediaBrowser.Common.Implementations.ScheduledTasks.Tasks
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{
/// <summary>
/// Deletes old cache files
/// </summary>
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public class DeleteCacheFileTask : IScheduledTask, IConfigurableScheduledTask
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{
/// <summary>
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/// Gets or sets the application paths.
/// </summary>
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/// <value>The application paths.</value>
private IApplicationPaths ApplicationPaths { get; set; }
private readonly ILogger _logger;
private readonly IFileSystem _fileSystem;
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/// <summary>
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/// Initializes a new instance of the <see cref="DeleteCacheFileTask" /> class.
/// </summary>
public DeleteCacheFileTask(IApplicationPaths appPaths, ILogger logger, IFileSystem fileSystem)
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{
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ApplicationPaths = appPaths;
_logger = logger;
_fileSystem = fileSystem;
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}
/// <summary>
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/// Creates the triggers that define when the task will run
/// </summary>
/// <returns>IEnumerable{BaseTaskTrigger}.</returns>
public IEnumerable<ITaskTrigger> GetDefaultTriggers()
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{
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// Until we can vary these default triggers per server and MBT, we need something that makes sense for both
return new ITaskTrigger[] {
// At startup
new StartupTrigger (),
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// Every so often
new IntervalTrigger { Interval = TimeSpan.FromHours(24)}
};
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}
/// <summary>
/// Returns the task to be executed
/// </summary>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="progress">The progress.</param>
/// <returns>Task.</returns>
public Task Execute(CancellationToken cancellationToken, IProgress<double> progress)
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{
var minDateModified = DateTime.UtcNow.AddDays(-30);
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try
{
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DeleteCacheFilesFromDirectory(cancellationToken, ApplicationPaths.CachePath, minDateModified, progress);
}
catch (DirectoryNotFoundException)
{
// No biggie here. Nothing to delete
}
progress.Report(90);
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minDateModified = DateTime.UtcNow.AddDays(-3);
try
{
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DeleteCacheFilesFromDirectory(cancellationToken, ApplicationPaths.TempDirectory, minDateModified, progress);
}
catch (DirectoryNotFoundException)
{
// No biggie here. Nothing to delete
}
return Task.FromResult(true);
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}
/// <summary>
/// Deletes the cache files from directory with a last write time less than a given date
/// </summary>
/// <param name="cancellationToken">The task cancellation token.</param>
/// <param name="directory">The directory.</param>
/// <param name="minDateModified">The min date modified.</param>
/// <param name="progress">The progress.</param>
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private void DeleteCacheFilesFromDirectory(CancellationToken cancellationToken, string directory, DateTime minDateModified, IProgress<double> progress)
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{
var filesToDelete = new DirectoryInfo(directory).EnumerateFiles("*", SearchOption.AllDirectories)
.Where(f => _fileSystem.GetLastWriteTimeUtc(f) < minDateModified)
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.ToList();
var index = 0;
foreach (var file in filesToDelete)
{
double percent = index;
percent /= filesToDelete.Count;
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progress.Report(100 * percent);
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cancellationToken.ThrowIfCancellationRequested();
DeleteFile(file.FullName);
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index++;
}
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progress.Report(100);
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}
private void DeleteFile(string path)
{
try
{
File.Delete(path);
}
catch (IOException ex)
{
_logger.ErrorException("Error deleting file {0}", ex, path);
}
}
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/// <summary>
/// Gets the name of the task
/// </summary>
/// <value>The name.</value>
public string Name
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{
get { return "Cache file cleanup"; }
}
/// <summary>
/// Gets the description.
/// </summary>
/// <value>The description.</value>
public string Description
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{
get { return "Deletes cache files no longer needed by the system"; }
}
/// <summary>
/// Gets the category.
/// </summary>
/// <value>The category.</value>
public string Category
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{
get
{
return "Maintenance";
}
}
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/// <summary>
/// Gets a value indicating whether this instance is hidden.
/// </summary>
/// <value><c>true</c> if this instance is hidden; otherwise, <c>false</c>.</value>
public bool IsHidden
{
get { return true; }
}
public bool IsEnabled
{
get { return true; }
}
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}
}