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reduce locking on folder children

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This commit is contained in:
Luke Pulverenti 2013-09-25 14:05:21 -04:00
parent 2d9b48d00f
commit 7360950496
8 changed files with 52 additions and 34 deletions
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18
MediaBrowser.Controller/Entities/BaseItem.cs
View File

@ -336,7 +336,7 @@ namespace MediaBrowser.Controller.Entities
return _resolveArgs;
}
set
private set
{
_resolveArgs = value;
_resolveArgsInitialized = value != null;
@ -349,7 +349,17 @@ namespace MediaBrowser.Controller.Entities
/// <param name="pathInfo">The path info.</param>
public void ResetResolveArgs(FileSystemInfo pathInfo)
{
ResolveArgs = CreateResolveArgs(pathInfo);
ResetResolveArgs(CreateResolveArgs(pathInfo));
}
public void ResetResolveArgs()
{
ResolveArgs = null;
}
public void ResetResolveArgs(ItemResolveArgs args)
{
ResolveArgs = args;
}
/// <summary>
@ -887,10 +897,10 @@ namespace MediaBrowser.Controller.Entities
/// <returns>true if a provider reports we changed</returns>
public virtual async Task<bool> RefreshMetadata(CancellationToken cancellationToken, bool forceSave = false, bool forceRefresh = false, bool allowSlowProviders = true, bool resetResolveArgs = true)
{
if (resetResolveArgs)
if (resetResolveArgs || ResolveArgs == null)
{
// Reload this
ResolveArgs = null;
ResetResolveArgs();
}
// Refresh for the item

47
MediaBrowser.Controller/Entities/Folder.cs
View File

@ -107,31 +107,36 @@ namespace MediaBrowser.Controller.Entities
protected void AddChildrenInternal(IEnumerable<BaseItem> children)
{
foreach (var child in children)
lock (ChildrenSyncLock)
{
AddChildInternal(child);
var newChildren = _children.ToList();
newChildren.AddRange(children);
_children = newChildren;
}
}
protected void AddChildInternal(BaseItem child)
{
_children.Add(child);
lock (ChildrenSyncLock)
{
var newChildren = _children.ToList();
newChildren.Add(child);
_children = newChildren;
}
}
protected void RemoveChildrenInternal(IEnumerable<BaseItem> children)
{
lock (ChildrenSyncLock)
{
_children = new ConcurrentBag<BaseItem>(_children.Except(children));
_children = _children.Except(children).ToList();
}
}
protected void ClearChildrenInternal()
{
BaseItem removed;
while (_children.TryTake(out removed))
lock (ChildrenSyncLock)
{
_children = new List<BaseItem>();
}
}
@ -508,11 +513,7 @@ namespace MediaBrowser.Controller.Entities
/// <summary>
/// The children
/// </summary>
private ConcurrentBag<BaseItem> _children;
/// <summary>
/// The _children initialized
/// </summary>
private bool _childrenInitialized;
private List<BaseItem> _children;
/// <summary>
/// The _children sync lock
/// </summary>
@ -525,11 +526,15 @@ namespace MediaBrowser.Controller.Entities
{
get
{
LazyInitializer.EnsureInitialized(ref _children, ref _childrenInitialized, ref ChildrenSyncLock, LoadChildrenInternal);
return _children;
}
}
public void LoadSavedChildren()
{
_children = LoadChildrenInternal();
}
/// <summary>
/// thread-safe access to the actual children of this folder - without regard to user
/// </summary>
@ -566,16 +571,15 @@ namespace MediaBrowser.Controller.Entities
}
}
private ConcurrentBag<BaseItem> LoadChildrenInternal()
private List<BaseItem> LoadChildrenInternal()
{
return new ConcurrentBag<BaseItem>(LoadChildren());
return LoadChildren().ToList();
}
/// <summary>
/// Loads our children. Validation will occur externally.
/// We want this sychronous.
/// </summary>
/// <returns>ConcurrentBag{BaseItem}.</returns>
protected virtual IEnumerable<BaseItem> LoadChildren()
{
//just load our children from the repo - the library will be validated and maintained in other processes
@ -698,7 +702,7 @@ namespace MediaBrowser.Controller.Entities
if (currentChildren.TryGetValue(child.Id, out currentChild))
{
currentChild.ResolveArgs = child.ResolveArgs;
currentChild.ResetResolveArgs(child.ResolveArgs);
//existing item - check if it has changed
if (currentChild.HasChanged(child))
@ -760,12 +764,7 @@ namespace MediaBrowser.Controller.Entities
await LibraryManager.CreateItems(newItems, cancellationToken).ConfigureAwait(false);
foreach (var item in newItems)
{
_children.Add(item);
Logger.Debug("** " + item.Name + " Added to library.");
}
AddChildrenInternal(newItems);
await ItemRepository.SaveChildren(Id, _children.Select(i => i.Id).ToList(), cancellationToken).ConfigureAwait(false);

2
MediaBrowser.Controller/Entities/Movies/Movie.cs
View File

@ -114,7 +114,7 @@ namespace MediaBrowser.Controller.Entities.Movies
if (dbItem != null)
{
dbItem.ResolveArgs = video.ResolveArgs;
dbItem.ResetResolveArgs(video.ResolveArgs);
video = dbItem;
}

2
MediaBrowser.Controller/Entities/User.cs
View File

@ -312,7 +312,7 @@ namespace MediaBrowser.Controller.Entities
if (resetResolveArgs)
{
// Reload this
ResolveArgs = null;
ResetResolveArgs();
}
var updateReason = await ProviderManager.ExecuteMetadataProviders(this, cancellationToken, forceRefresh, allowSlowProviders).ConfigureAwait(false);

2
MediaBrowser.Controller/Entities/Video.cs
View File

@ -246,7 +246,7 @@ namespace MediaBrowser.Controller.Entities
if (dbItem != null)
{
dbItem.ResolveArgs = video.ResolveArgs;
dbItem.ResetResolveArgs(video.ResolveArgs);
video = dbItem;
}

11
MediaBrowser.Server.Implementations/Library/LibraryManager.cs
View File

@ -1346,7 +1346,16 @@ namespace MediaBrowser.Server.Implementations.Library
/// <returns>BaseItem.</returns>
public BaseItem RetrieveItem(Guid id)
{
return ItemRepository.RetrieveItem(id);
var item = ItemRepository.RetrieveItem(id);
var folder = item as Folder;
if (folder != null)
{
folder.LoadSavedChildren();
}
return item;
}
private readonly ConcurrentDictionary<string, SemaphoreSlim> _fileLocks = new ConcurrentDictionary<string, SemaphoreSlim>();

2
MediaBrowser.Server.Implementations/Library/ResolverHelper.cs
View File

@ -20,7 +20,7 @@ namespace MediaBrowser.Server.Implementations.Library
/// <param name="args">The args.</param>
public static void SetInitialItemValues(BaseItem item, ItemResolveArgs args)
{
item.ResolveArgs = args;
item.ResetResolveArgs(args);
// If the resolver didn't specify this
if (string.IsNullOrEmpty(item.Path))

2
MediaBrowser.ServerApplication/App.xaml.cs
View File

@ -95,7 +95,7 @@ namespace MediaBrowser.ServerApplication
EventHelper.FireEventIfNotNull(AppStarted, this, EventArgs.Empty, _logger);
await task.ConfigureAwait(false);
await task;
}
catch (Exception ex)
{