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Increase library scan and metadata refresh speed

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This commit is contained in:
Gary Wilber
2020-09-30 19:33:34 -07:00
parent c7b3d4a90c
commit c2276b17cb
4 changed files with 283 additions and 83 deletions
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220
MediaBrowser.Controller/Entities/Folder.cs
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@@ -35,6 +35,46 @@ namespace MediaBrowser.Controller.Entities
/// </summary>
public class Folder : BaseItem
{
/// <summary>
/// Contains constants used when reporting scan progress.
/// </summary>
private static class ProgressHelpers
{
/// <summary>
/// Reported after the folders immediate children are retrieved.
/// </summary>
public const int RetrievedChildren = 5;
/// <summary>
/// Reported after add, updating, or deleting child items from the LibraryManager.
/// </summary>
public const int UpdatedChildItems = 10;
/// <summary>
/// Reported once subfolders are scanned.
/// When scanning subfolders, the progress will be between [UpdatedItems, ScannedSubfolders].
/// </summary>
public const int ScannedSubfolders = 50;
/// <summary>
/// Reported once metadata is refreshed.
/// When refreshing metadata, the progress will be between [ScannedSubfolders, MetadataRefreshed].
/// </summary>
public const int RefreshedMetadata = 100;
/// <summary>
/// Gets the current progress given the previous step, next step, and progress in between.
/// </summary>
/// <param name="previousProgressStep">The previous progress step.</param>
/// <param name="nextProgressStep">The next progress step.</param>
/// <param name="currentProgress">The current progress step.</param>
/// <returns>The progress.</returns>
public static double GetProgress(int previousProgressStep, int nextProgressStep, double currentProgress)
{
return previousProgressStep + ((nextProgressStep - previousProgressStep) * (currentProgress / 100));
}
}
public static IUserViewManager UserViewManager { get; set; }
/// <summary>
@@ -327,11 +367,11 @@ namespace MediaBrowser.Controller.Entities
return;
}
progress.Report(5);
progress.Report(ProgressHelpers.RetrievedChildren);
if (recursive)
{
ProviderManager.OnRefreshProgress(this, 5);
ProviderManager.OnRefreshProgress(this, ProgressHelpers.RetrievedChildren);
}
// Build a dictionary of the current children we have now by Id so we can compare quickly and easily
@@ -392,11 +432,11 @@ namespace MediaBrowser.Controller.Entities
validChildrenNeedGeneration = true;
}
progress.Report(10);
progress.Report(ProgressHelpers.UpdatedChildItems);
if (recursive)
{
ProviderManager.OnRefreshProgress(this, 10);
ProviderManager.OnRefreshProgress(this, ProgressHelpers.UpdatedChildItems);
}
cancellationToken.ThrowIfCancellationRequested();
@@ -406,11 +446,13 @@ namespace MediaBrowser.Controller.Entities
var innerProgress = new ActionableProgress<double>();
var folder = this;
innerProgress.RegisterAction(p =>
innerProgress.RegisterAction(innerPercent =>
{
double newPct = 0.80 * p + 10;
progress.Report(newPct);
ProviderManager.OnRefreshProgress(folder, newPct);
var percent = ProgressHelpers.GetProgress(ProgressHelpers.UpdatedChildItems, ProgressHelpers.ScannedSubfolders, innerPercent);
progress.Report(percent);
ProviderManager.OnRefreshProgress(folder, percent);
});
if (validChildrenNeedGeneration)
@@ -424,11 +466,11 @@ namespace MediaBrowser.Controller.Entities
if (refreshChildMetadata)
{
progress.Report(90);
progress.Report(ProgressHelpers.ScannedSubfolders);
if (recursive)
{
ProviderManager.OnRefreshProgress(this, 90);
ProviderManager.OnRefreshProgress(this, ProgressHelpers.ScannedSubfolders);
}
var container = this as IMetadataContainer;
@@ -436,13 +478,15 @@ namespace MediaBrowser.Controller.Entities
var innerProgress = new ActionableProgress<double>();
var folder = this;
innerProgress.RegisterAction(p =>
innerProgress.RegisterAction(innerPercent =>
{
double newPct = 0.10 * p + 90;
progress.Report(newPct);
var percent = ProgressHelpers.GetProgress(ProgressHelpers.ScannedSubfolders, ProgressHelpers.RefreshedMetadata, innerPercent);
progress.Report(percent);
if (recursive)
{
ProviderManager.OnRefreshProgress(folder, newPct);
ProviderManager.OnRefreshProgress(folder, percent);
}
});
@@ -457,55 +501,37 @@ namespace MediaBrowser.Controller.Entities
validChildren = Children.ToList();
}
await RefreshMetadataRecursive(validChildren, refreshOptions, recursive, innerProgress, cancellationToken);
await RefreshMetadataRecursive(validChildren, refreshOptions, recursive, innerProgress, cancellationToken).ConfigureAwait(false);
}
}
}
private async Task RefreshMetadataRecursive(List<BaseItem> children, MetadataRefreshOptions refreshOptions, bool recursive, IProgress<double> progress, CancellationToken cancellationToken)
private Task RefreshMetadataRecursive(IList<BaseItem> children, MetadataRefreshOptions refreshOptions, bool recursive, IProgress<double> progress, CancellationToken cancellationToken)
{
var numComplete = 0;
var count = children.Count;
double currentPercent = 0;
var progressableTasks = children
.Select<BaseItem, Func<IProgress<double>, Task>>(child =>
innerProgress => RefreshChildMetadata(child, refreshOptions, recursive && child.IsFolder, innerProgress, cancellationToken))
.ToList();
foreach (var child in children)
{
cancellationToken.ThrowIfCancellationRequested();
var innerProgress = new ActionableProgress<double>();
// Avoid implicitly captured closure
var currentInnerPercent = currentPercent;
innerProgress.RegisterAction(p =>
{
double innerPercent = currentInnerPercent;
innerPercent += p / count;
progress.Report(innerPercent);
});
await RefreshChildMetadata(child, refreshOptions, recursive && child.IsFolder, innerProgress, cancellationToken)
.ConfigureAwait(false);
numComplete++;
double percent = numComplete;
percent /= count;
percent *= 100;
currentPercent = percent;
progress.Report(percent);
}
return RunTasks(progressableTasks, progress, cancellationToken);
}
private async Task RefreshAllMetadataForContainer(IMetadataContainer container, MetadataRefreshOptions refreshOptions, IProgress<double> progress, CancellationToken cancellationToken)
{
var series = container as Series;
if (series != null)
{
await series.RefreshMetadata(refreshOptions, cancellationToken).ConfigureAwait(false);
}
// limit the amount of concurrent metadata refreshes
await TaskMethods.RunThrottled(
TaskMethods.SharedThrottleId.RefreshMetadata,
async () =>
{
var series = container as Series;
if (series != null)
{
await series.RefreshMetadata(refreshOptions, cancellationToken).ConfigureAwait(false);
}
await container.RefreshAllMetadata(refreshOptions, progress, cancellationToken).ConfigureAwait(false);
await container.RefreshAllMetadata(refreshOptions, progress, cancellationToken).ConfigureAwait(false);
},
cancellationToken).ConfigureAwait(false);
}
private async Task RefreshChildMetadata(BaseItem child, MetadataRefreshOptions refreshOptions, bool recursive, IProgress<double> progress, CancellationToken cancellationToken)
@@ -520,12 +546,16 @@ namespace MediaBrowser.Controller.Entities
{
if (refreshOptions.RefreshItem(child))
{
await child.RefreshMetadata(refreshOptions, cancellationToken).ConfigureAwait(false);
// limit the amount of concurrent metadata refreshes
await TaskMethods.RunThrottled(
TaskMethods.SharedThrottleId.RefreshMetadata,
async () => await child.RefreshMetadata(refreshOptions, cancellationToken).ConfigureAwait(false),
cancellationToken).ConfigureAwait(false);
}
if (recursive && child is Folder folder)
{
await folder.RefreshMetadataRecursive(folder.Children.ToList(), refreshOptions, true, progress, cancellationToken);
await folder.RefreshMetadataRecursive(folder.Children.ToList(), refreshOptions, true, progress, cancellationToken).ConfigureAwait(false);
}
}
}
@@ -538,39 +568,63 @@ namespace MediaBrowser.Controller.Entities
/// <param name="progress">The progress.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
private async Task ValidateSubFolders(IList<Folder> children, IDirectoryService directoryService, IProgress<double> progress, CancellationToken cancellationToken)
private Task ValidateSubFolders(IList<Folder> children, IDirectoryService directoryService, IProgress<double> progress, CancellationToken cancellationToken)
{
var numComplete = 0;
var count = children.Count;
double currentPercent = 0;
var progressableTasks = children
.Select<Folder, Func<IProgress<double>, Task>>(child =>
innerProgress => child.ValidateChildrenInternal(innerProgress, cancellationToken, true, false, null, directoryService))
.ToList();
foreach (var child in children)
return RunTasks(progressableTasks, progress, cancellationToken);
}
/// <summary>
/// Runs a set of tasks concurrently with progress.
/// </summary>
/// <param name="tasks">A list of tasks.</param>
/// <param name="progress">The progress.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
private async Task RunTasks(IList<Func<IProgress<double>, Task>> tasks, IProgress<double> progress, CancellationToken cancellationToken)
{
var childrenCount = tasks.Count;
var childrenProgress = new double[childrenCount];
var actions = new Func<Task>[childrenCount];
void UpdateProgress()
{
cancellationToken.ThrowIfCancellationRequested();
var innerProgress = new ActionableProgress<double>();
// Avoid implicitly captured closure
var currentInnerPercent = currentPercent;
innerProgress.RegisterAction(p =>
{
double innerPercent = currentInnerPercent;
innerPercent += p / count;
progress.Report(innerPercent);
});
await child.ValidateChildrenInternal(innerProgress, cancellationToken, true, false, null, directoryService)
.ConfigureAwait(false);
numComplete++;
double percent = numComplete;
percent /= count;
percent *= 100;
currentPercent = percent;
progress.Report(percent);
progress.Report(childrenProgress.Average());
}
for (var i = 0; i < childrenCount; i++)
{
var childIndex = i;
var child = tasks[childIndex];
actions[childIndex] = async () =>
{
var innerProgress = new ActionableProgress<double>();
innerProgress.RegisterAction(innerPercent =>
{
// round the percent and only update progress if it changed to prevent excessive UpdateProgress calls
var innerPercentRounded = Math.Round(innerPercent);
if (childrenProgress[childIndex] != innerPercentRounded)
{
childrenProgress[childIndex] = innerPercentRounded;
UpdateProgress();
}
});
await tasks[childIndex](innerProgress).ConfigureAwait(false);
childrenProgress[childIndex] = 100;
UpdateProgress();
};
}
await TaskMethods.WhenAllThrottled(TaskMethods.SharedThrottleId.ScanFanout, actions, cancellationToken).ConfigureAwait(false);
}
/// <summary>