protected virtual async Task Update()
{
Logger.Write(this, LogLevel.Debug, "Updating {0} columns...", this.Columns.Count);
var columns = new List <PlaylistColumn>();
using (var database = this.DatabaseFactory.Create())
{
using (var task = new SingletonReentrantTask(CancellationToken.None, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
using (var transaction = database.BeginTransaction(database.PreferredIsolationLevel))
{
var set = database.Set <PlaylistColumn>(transaction);
foreach (var pair in this.Columns)
{
Logger.Write(this, LogLevel.Debug, "Updating column {0} => {1}.", pair.Key.Id, pair.Key.Name);
await set.AddOrUpdateAsync(pair.Key).ConfigureAwait(false);
if (pair.Value)
{
columns.Add(pair.Key);
}
this.Columns.TryRemove(pair.Key);
}
transaction.Commit();
}
}))
{
await task.Run().ConfigureAwait(false);
}
}
if (columns.Any())
{
await this.SignalEmitter.Send(new Signal(this, CommonSignals.PlaylistColumnsUpdated, columns.ToArray())).ConfigureAwait(false);
}
}
protected override async Task OnRun()
{
var position = 0;
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_LOW, async cancellationToken =>
{
var metaDataSource = this.MetaDataSourceFactory.Create();
foreach (var libraryItem in this.LibraryItems)
{
this.Description = Path.GetFileName(libraryItem.FileName);
this.Position = position;
if (!File.Exists(libraryItem.FileName))
{
Logger.Write(this, LogLevel.Debug, "File \"{0}\" no longer exists: Cannot refresh.", libraryItem.FileName);
continue;
}
var metaDatas = await metaDataSource.GetMetaData(libraryItem.FileName).ConfigureAwait(false);
MetaDataItem.Update(metaDatas, libraryItem.MetaDatas, null);
await this.WriteLibraryMetaData(libraryItem).ConfigureAwait(false);
libraryItem.Status = LibraryItemStatus.Import;
await LibraryTaskBase.UpdateLibraryItem(this.Database, libraryItem).ConfigureAwait(false);
position++;
}
}))
{
await task.Run().ConfigureAwait(false);
}
}
protected override async Task OnRun()
{
var position = 0;
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_LOW, async cancellationToken =>
{
var metaDataSource = this.MetaDataSourceFactory.Create();
foreach (var libraryItem in this.LibraryItems)
{
await this.SetDescription(new FileInfo(libraryItem.FileName).Name).ConfigureAwait(false);
await this.SetPosition(position).ConfigureAwait(false);
if (!File.Exists(libraryItem.FileName))
{
Logger.Write(this, LogLevel.Debug, "File \"{0}\" no longer exists: Cannot refresh.", libraryItem.FileName);
continue;
}
libraryItem.MetaDatas = new ObservableCollection <MetaDataItem>(
await metaDataSource.GetMetaData(libraryItem.FileName)
.ConfigureAwait(false));
await this.WriteLibraryMetaData(libraryItem).ConfigureAwait(false);
await LibraryTaskBase.SetLibraryItemStatus(this.Database, libraryItem.Id, LibraryItemStatus.Import).ConfigureAwait(false);
position++;
}
}))
{
await task.Run().ConfigureAwait(false);
}
}
protected override async Task OnRun()
{
this.Name = "Opening CD";
try
{
if (!BassCd.IsReady(this.Drive))
{
throw new InvalidOperationException("Drive is not ready.");
}
var playlist = this.PlaylistManager.SelectedPlaylist;
var playlistItems = await this.Factory.Create().ConfigureAwait(false);
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
//Always append for now.
this.Sequence = this.PlaylistBrowser.GetInsertIndex(this.PlaylistManager.SelectedPlaylist);
await this.AddPlaylistItems(playlist, playlistItems).ConfigureAwait(false);
await this.ShiftItems(QueryOperator.GreaterOrEqual, this.Sequence, this.Offset).ConfigureAwait(false);
await this.SetPlaylistItemsStatus(PlaylistItemStatus.None).ConfigureAwait(false);
}))
{
await task.Run().ConfigureAwait(false);
}
}
finally
{
//Ignoring result on purpose.
BassCd.Release(this.Drive);
}
await this.SignalEmitter.Send(new Signal(this, CommonSignals.PlaylistUpdated, new[] { this.Playlist })).ConfigureAwait(false);
}
private async Task AddPlaylistItems()
{
this.Name = "Creating playlist";
this.Count = this.LibraryHierarchyNodes.Count();
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
using (var transaction = this.Database.BeginTransaction(this.Database.PreferredIsolationLevel))
{
var position = 0;
foreach (var libraryHierarchyNode in this.LibraryHierarchyNodes)
{
if (this.IsCancellationRequested)
{
break;
}
this.Description = libraryHierarchyNode.Value;
await this.AddPlaylistItems(this.Database.Queries.AddLibraryHierarchyNodeToPlaylist(this.Filter, this.Sort.Value), libraryHierarchyNode, transaction).ConfigureAwait(false);
this.Position = ++position;
}
if (transaction.HasTransaction)
{
transaction.Commit();
}
}
}))
{
await task.Run().ConfigureAwait(false);
}
}
protected virtual async Task BuildHierarchies(LibraryItemStatus?status)
{
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_LOW, async cancellationToken =>
{
using (var transaction = this.Database.BeginTransaction(this.Database.PreferredIsolationLevel))
{
await this.AddHiearchies(status, cancellationToken, transaction).ConfigureAwait(false);
if (cancellationToken.IsCancellationRequested)
{
this.Name = "Waiting..";
this.Description = string.Empty;
}
else
{
this.Name = "Finalizing";
this.Position = 0;
this.Count = 0;
}
transaction.Commit();
}
}))
{
await task.Run().ConfigureAwait(false);
}
}
protected virtual async Task MoveItems(IEnumerable <PlaylistItem> playlistItems)
{
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
using (var transaction = this.Database.BeginTransaction(this.Database.PreferredIsolationLevel))
{
foreach (var playlistItem in playlistItems)
{
await this.Database.ExecuteAsync(this.Database.Queries.MovePlaylistItem, (parameters, phase) =>
{
switch (phase)
{
case DatabaseParameterPhase.Fetch:
parameters["id"] = playlistItem.Id;
parameters["sequence"] = this.Sequence;
break;
}
}, transaction).ConfigureAwait(false);
if (playlistItem.Sequence > this.Sequence)
{
//TODO: If the current sequence is less than the target sequence we don't have to increment the counter.
//TODO: I don't really understand why.
this.Sequence++;
}
}
transaction.Commit();
}
}))
{
await task.Run().ConfigureAwait(false);
}
}
protected virtual async Task RemoveItems(PlaylistItemStatus status)
{
await this.SetIsIndeterminate(true).ConfigureAwait(false);
Logger.Write(this, LogLevel.Debug, "Removing playlist items.");
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
using (var transaction = this.Database.BeginTransaction(this.Database.PreferredIsolationLevel))
{
await this.Database.ExecuteAsync(this.Database.Queries.RemovePlaylistItems, (parameters, phase) =>
{
switch (phase)
{
case DatabaseParameterPhase.Fetch:
parameters["status"] = status;
break;
}
}, transaction).ConfigureAwait(false);
transaction.Commit();
}
}))
{
await task.Run().ConfigureAwait(false);
}
}
protected virtual async Task AddPlaylistItems(LibraryHierarchyNode libraryHierarchyNode, string filter)
{
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
using (var transaction = this.Database.BeginTransaction(this.Database.PreferredIsolationLevel))
{
this.Offset = await this.Database.ExecuteScalarAsync <int>(this.Database.Queries.AddLibraryHierarchyNodeToPlaylist(filter, this.Sort.Value), (parameters, phase) =>
{
switch (phase)
{
case DatabaseParameterPhase.Fetch:
parameters["playlistId"] = this.Playlist.Id;
parameters["libraryHierarchyId"] = libraryHierarchyNode.LibraryHierarchyId;
parameters["libraryHierarchyItemId"] = libraryHierarchyNode.Id;
parameters["sequence"] = this.Sequence;
parameters["status"] = PlaylistItemStatus.Import;
break;
}
}, transaction).ConfigureAwait(false);
transaction.Commit();
}
}))
{
await task.Run().ConfigureAwait(false);
}
}
protected virtual async Task AddPlaylistItems(IEnumerable <PlaylistItem> playlistItems)
{
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
using (var transaction = this.Database.BeginTransaction(this.Database.PreferredIsolationLevel))
{
var set = this.Database.Set <PlaylistItem>(transaction);
var position = 0;
foreach (var playlistItem in PlaylistItem.Clone(playlistItems))
{
Logger.Write(this, LogLevel.Debug, "Adding file to playlist: {0}", playlistItem.FileName);
playlistItem.Playlist_Id = this.Playlist.Id;
playlistItem.Sequence = this.Sequence + position;
playlistItem.Status = PlaylistItemStatus.Import;
await set.AddAsync(playlistItem).ConfigureAwait(false);
position++;
}
this.Offset += position;
if (transaction.HasTransaction)
{
transaction.Commit();
}
}
}))
{
await task.Run().ConfigureAwait(false);
}
}
protected virtual async Task SynchronizePlaylistItems()
{
var playlistItems = default(IEnumerable <PlaylistItem>);
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_LOW, cancellationToken =>
{
using (var transaction = this.Database.BeginTransaction(this.Database.PreferredIsolationLevel))
{
var queryable = this.Database.AsQueryable <PlaylistItem>(transaction);
//TODO: Add Enum.HasFlag support to FoxDb.
playlistItems = queryable.Where(playlistItem => playlistItem.Flags == PlaylistItemFlags.Export).ToArray();
}
#if NET40
return(TaskEx.FromResult(false));
#else
return(Task.CompletedTask);
#endif
}))
{
await task.Run().ConfigureAwait(false);
}
if (!playlistItems.Any())
{
return;
}
await this.MetaDataManager.Synchronize(playlistItems).ConfigureAwait(false);
}
protected override async Task OnRun()
{
var position = 0;
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_LOW, async cancellationToken =>
{
var metaDataSource = this.MetaDataSourceFactory.Create();
foreach (var libraryItem in this.LibraryItems)
{
if (this.IsCancellationRequested)
{
break;
}
await this.SetDescription(new FileInfo(libraryItem.FileName).Name).ConfigureAwait(false);
await this.SetPosition(position).ConfigureAwait(false);
if (!File.Exists(libraryItem.FileName))
{
Logger.Write(this, LogLevel.Debug, "File \"{0}\" no longer exists: Cannot update.", libraryItem.FileName);
this.Errors.Add(libraryItem, new FileNotFoundException(string.Format("File \"{0}\" no longer exists: Cannot update.", libraryItem.FileName)));
position++;
continue;
}
try
{
await metaDataSource.SetMetaData(
libraryItem.FileName,
libraryItem.MetaDatas,
metaDataItem => this.Names == null || !this.Names.Any() || this.Names.Contains(metaDataItem.Name, true)
).ConfigureAwait(false);
}
catch (Exception e)
{
this.Errors.Add(libraryItem, e);
position++;
continue;
}
foreach (var metaDataItem in libraryItem.MetaDatas.ToArray())
{
if (!string.IsNullOrEmpty(metaDataItem.Value))
{
continue;
}
libraryItem.MetaDatas.Remove(metaDataItem);
}
await this.WriteLibraryMetaData(libraryItem).ConfigureAwait(false);
await LibraryTaskBase.SetLibraryItemStatus(this.Database, libraryItem.Id, LibraryItemStatus.Import).ConfigureAwait(false);
position++;
}
}))
{
await task.Run().ConfigureAwait(false);
}
}
protected virtual async Task RescanLibrary(IEnumerable <string> paths)
{
var predicate = new Func <LibraryItem, bool>(libraryItem =>
{
if (!paths.Any(path => libraryItem.FileName.StartsWith(path)))
{
Logger.Write(this, LogLevel.Debug, "Removing unparented file: {0} => {1}", libraryItem.Id, libraryItem.FileName);
return(true);
}
var file = new FileInfo(libraryItem.FileName);
if (!file.Exists)
{
Logger.Write(this, LogLevel.Debug, "Removing dead file: {0} => {1}", libraryItem.Id, libraryItem.FileName);
return(true);
}
if (file.LastWriteTimeUtc > libraryItem.GetImportDate())
{
Logger.Write(this, LogLevel.Debug, "Refreshing modified file: {0} => {1}", libraryItem.Id, libraryItem.FileName);
return(true);
}
return(false);
});
var action = new Func <IDatabaseSet <LibraryItem>, LibraryItem, Task>(async(set, libraryItem) =>
{
libraryItem.Status = LibraryItemStatus.Remove;
//TODO: Writing to IDatabaseSet is not thread safe.
Monitor.Enter(set);
try
{
await set.AddOrUpdateAsync(libraryItem).ConfigureAwait(false);
}
finally
{
Monitor.Exit(set);
}
});
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_LOW, async cancellationToken =>
{
using (var transaction = this.Database.BeginTransaction(this.Database.PreferredIsolationLevel))
{
using (var libraryUpdater = new LibraryUpdater(this.Database, Enumerable.Empty <LibraryItem>(), predicate, action, this.Visible, transaction))
{
libraryUpdater.InitializeComponent(this.Core);
await this.WithSubTask(libraryUpdater,
() => libraryUpdater.Populate(cancellationToken)
).ConfigureAwait(false);
}
if (transaction.HasTransaction)
{
transaction.Commit();
}
}
}))
{
await task.Run().ConfigureAwait(false);
}
}
protected override async Task AddPaths(IEnumerable <string> paths)
{
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
await this.AddPlaylistItems(paths, cancellationToken).ConfigureAwait(false);
await this.ShiftItems(QueryOperator.GreaterOrEqual, this.Sequence, this.Offset).ConfigureAwait(false);
await this.SequenceItems().ConfigureAwait(false);
await this.SetPlaylistItemsStatus(PlaylistItemStatus.None).ConfigureAwait(false);
}))
{
await task.Run().ConfigureAwait(false);
}
}
protected virtual async Task AddPaths(IEnumerable <string> paths, bool buildHierarchies)
{
var complete = true;
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_LOW, async cancellationToken =>
{
await this.AddLibraryItems(paths, cancellationToken).ConfigureAwait(false);
if (cancellationToken.IsCancellationRequested)
{
await this.SetName("Waiting..").ConfigureAwait(false);
await this.SetDescription(string.Empty).ConfigureAwait(false);
}
}))
{
await task.Run().ConfigureAwait(false);
}
if (this.IsCancellationRequested)
{
//Reset cancellation as the next phases should finish quickly.
//Cancelling again will still work.
this.IsCancellationRequested = false;
complete = false;
}
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_LOW, async cancellationToken =>
{
await this.AddOrUpdateMetaData(cancellationToken).ConfigureAwait(false);
if (cancellationToken.IsCancellationRequested)
{
await this.SetName("Waiting..").ConfigureAwait(false);
await this.SetDescription(string.Empty).ConfigureAwait(false);
}
}))
{
await task.Run().ConfigureAwait(false);
}
if (this.IsCancellationRequested)
{
//Reset cancellation as the next phases should finish quickly.
//Cancelling again will still work.
this.IsCancellationRequested = false;
complete = false;
}
if (buildHierarchies)
{
await this.BuildHierarchies(LibraryItemStatus.Import).ConfigureAwait(false);
}
if (complete)
{
await SetLibraryItemsStatus(this.Database, LibraryItemStatus.None).ConfigureAwait(false);
}
}
protected virtual async Task AddPaths(IEnumerable <string> paths)
{
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
await this.AddPlaylistItems(paths, cancellationToken).ConfigureAwait(false);
await this.ShiftItems(QueryOperator.GreaterOrEqual, this.Sequence, this.Offset).ConfigureAwait(false);
await this.SignalEmitter.Send(new Signal(this, CommonSignals.PlaylistUpdated, new[] { this.Playlist })).ConfigureAwait(false);
await this.AddOrUpdateMetaData(cancellationToken).ConfigureAwait(false);
await this.SequenceItems().ConfigureAwait(false);
await this.SetPlaylistItemsStatus(PlaylistItemStatus.None).ConfigureAwait(false);
}))
{
await task.Run().ConfigureAwait(false);
}
}
protected virtual async Task RemoveItems(PlaylistItemStatus status)
{
Logger.Write(this, LogLevel.Debug, "Removing playlist items.");
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
using (var transaction = this.Database.BeginTransaction(this.Database.PreferredIsolationLevel))
{
await RemovePlaylistItems(this.Database, this.Playlist.Id, status, transaction).ConfigureAwait(false);
transaction.Commit();
}
}))
{
await task.Run().ConfigureAwait(false);
}
}
protected override async Task OnRun()
{
var position = 0;
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
foreach (var playlistItem in this.PlaylistItems)
{
if (this.IsCancellationRequested)
{
break;
}
if (this.Visible)
{
this.Description = Path.GetFileName(playlistItem.FileName);
this.Position = position;
}
if (playlistItem.LibraryItem_Id.HasValue)
{
await this.WriteLibraryMetaData(playlistItem).ConfigureAwait(false);
await LibraryTaskBase.UpdateLibraryItem(
this.Database,
playlistItem.LibraryItem_Id.Value,
libraryItem => libraryItem.Status = LibraryItemStatus.Import
).ConfigureAwait(false);
}
else
{
await this.WritePlaylistMetaData(playlistItem).ConfigureAwait(false);
}
if (this.WriteToFiles)
{
if (!await this.MetaDataManager.Synchronize(new[] { playlistItem }, this.Names.ToArray()).ConfigureAwait(false))
{
this.AddError(playlistItem, string.Format("Failed to write meta data to file \"{0}\". We will try again later.", playlistItem.FileName));
}
}
position++;
}
}))
{
await task.Run().ConfigureAwait(false);
}
}
protected override async Task AddPaths(IEnumerable <string> paths)
{
var libraryItems = await this.Factory.Create(paths).ConfigureAwait(false);
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
await this.RemoveLibraryItems().ConfigureAwait(false);
await this.AddLibraryItems(libraryItems).ConfigureAwait(false);
}))
{
await task.Run().ConfigureAwait(false);
}
await this.BuildHierarchies(LibraryItemStatus.Import).ConfigureAwait(false);
await RemoveCancelledLibraryItems(this.Database).ConfigureAwait(false);
await SetLibraryItemsStatus(this.Database, LibraryItemStatus.None).ConfigureAwait(false);
}
protected override async Task OnRun()
{
var cueSheet = this.Parser.Parse(this.FileName);
var playlistItems = await this.Factory.Create(cueSheet).ConfigureAwait(false);
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
await this.AddPlaylistItems(playlistItems).ConfigureAwait(false);
await this.ShiftItems(QueryOperator.GreaterOrEqual, this.Sequence, this.Offset).ConfigureAwait(false);
await this.SetPlaylistItemsStatus(PlaylistItemStatus.None).ConfigureAwait(false);
}))
{
await task.Run().ConfigureAwait(false);
}
await this.SignalEmitter.Send(new Signal(this, CommonSignals.PlaylistUpdated, new[] { this.Playlist })).ConfigureAwait(false);
}
private async Task AddPlaylistItems()
{
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
using (var transaction = this.Database.BeginTransaction(this.Database.PreferredIsolationLevel))
{
await this.AddPlaylistItems(this.Database.Queries.AddSearchToPlaylist(this.Filter, this.Sort, this.Limit), transaction).ConfigureAwait(false);
if (transaction.HasTransaction)
{
transaction.Commit();
}
}
}))
{
await task.Run().ConfigureAwait(false);
}
}
protected virtual async Task RemovePlaylist()
{
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
using (var transaction = this.Database.BeginTransaction(this.Database.PreferredIsolationLevel))
{
var set = this.Database.Set <Playlist>(transaction);
await set.RemoveAsync(this.Playlist).ConfigureAwait(false);
if (transaction.HasTransaction)
{
transaction.Commit();
}
}
}))
{
await task.Run().ConfigureAwait(false);
}
}
protected virtual async Task Update(Playlist playlist)
{
using (var database = this.DatabaseFactory.Create())
{
using (var task = new SingletonReentrantTask(CancellationToken.None, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
using (var transaction = database.BeginTransaction(database.PreferredIsolationLevel))
{
var set = database.Set <Playlist>(transaction);
await set.AddOrUpdateAsync(playlist).ConfigureAwait(false);
transaction.Commit();
}
}))
{
await task.Run().ConfigureAwait(false);
}
}
}
protected override async Task OnRun()
{
this.Name = "Opening archive";
var playlistItems = await this.Factory.Create().ConfigureAwait(false);
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
//Always append for now.
this.Sequence = this.PlaylistBrowser.GetInsertIndex(this.Playlist);
await this.AddPlaylistItems(this.Playlist, playlistItems).ConfigureAwait(false);
await this.ShiftItems(QueryOperator.GreaterOrEqual, this.Sequence, this.Offset).ConfigureAwait(false);
await this.SetPlaylistItemsStatus(PlaylistItemStatus.None).ConfigureAwait(false);
}))
{
await task.Run().ConfigureAwait(false);
}
await this.SignalEmitter.Send(new Signal(this, CommonSignals.PlaylistUpdated, new[] { this.Playlist })).ConfigureAwait(false);
}
public async Task SingletonReentrantTaskRespectsPriority()
{
var counter1 = 0;
var counter2 = 0;
var id = "5C8A060E-885C-4FF1-ABEB-DB046D2D8D1C";
var task1 = new SingletonReentrantTask(Placeholder.Instance, id, 10, SingletonReentrantTask.PRIORITY_LOW, async cancellationToken =>
{
for (; counter1 + counter2 < 10; counter1++)
{
if (cancellationToken.IsCancellationRequested)
{
break;
}
#if NET40
await TaskEx.Delay(100).ConfigureAwait(false);
#else
await Task.Delay(100).ConfigureAwait(false);
#endif
}
});
var task2 = new SingletonReentrantTask(Placeholder.Instance, id, 10, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
for (; counter1 + counter2 < 10; counter2++)
{
if (cancellationToken.IsCancellationRequested)
{
break;
}
#if NET40
await TaskEx.Delay(100).ConfigureAwait(false);
#else
await Task.Delay(100).ConfigureAwait(false);
#endif
}
});
#if NET40
await TaskEx.WhenAll(task1.Run(), task2.Run()).ConfigureAwait(false);
#else
await Task.WhenAll(task1.Run(), task2.Run()).ConfigureAwait(false);
#endif
Assert.AreEqual(10, counter1 + counter2);
Assert.Less(counter1, counter2);
}
protected virtual async Task RemoveItems(IEnumerable <PlaylistItem> playlistItems)
{
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
using (var transaction = this.Database.BeginTransaction(this.Database.PreferredIsolationLevel))
{
foreach (var playlistItem in playlistItems)
{
playlistItem.Status = PlaylistItemStatus.Remove;
}
var set = this.Database.Set <PlaylistItem>(transaction);
await set.AddOrUpdateAsync(playlistItems).ConfigureAwait(false);
if (transaction.HasTransaction)
{
transaction.Commit();
}
}
}))
{
await task.Run().ConfigureAwait(false);
}
await this.RemoveItems(PlaylistItemStatus.Remove).ConfigureAwait(false);
}
protected virtual async Task SortItems(IComparer <PlaylistItem> comparer, bool descending)
{
Logger.Write(this, LogLevel.Debug, "Sorting playlist using comparer: \"{0}\"", comparer.GetType().Name);
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
using (var transaction = this.Database.BeginTransaction(this.Database.PreferredIsolationLevel))
{
var set = this.Database.Set <PlaylistItem>(transaction);
var playlistItems = set.ToArray();
Array.Sort(playlistItems, comparer);
if (descending)
{
Logger.Write(this, LogLevel.Debug, "Sort is descending, reversing sequence.");
Array.Reverse(playlistItems);
}
for (var a = 0; a < playlistItems.Length; a++)
{
playlistItems[a].Sequence = a;
}
await EntityHelper <PlaylistItem> .Create(
this.Database,
this.Database.Tables.PlaylistItem,
transaction
).UpdateAsync(
playlistItems,
new[] { nameof(PlaylistItem.Sequence) }
).ConfigureAwait(false);
if (transaction.HasTransaction)
{
transaction.Commit();
}
}
}))
{
await task.Run().ConfigureAwait(false);
}
}
protected override async Task OnRun()
{
if (this.Drive == BassCdStreamProviderBehaviourConfiguration.CD_NO_DRIVE)
{
throw new InvalidOperationException("A valid drive must be provided.");
}
await this.SetName("Opening CD").ConfigureAwait(false);
await this.SetIsIndeterminate(true).ConfigureAwait(false);
try
{
if (!BassCd.IsReady(this.Drive))
{
throw new InvalidOperationException("Drive is not ready.");
}
using (var task = new SingletonReentrantTask(this, ComponentSlots.Database, SingletonReentrantTask.PRIORITY_HIGH, async cancellationToken =>
{
//Always append for now.
this.Sequence = await this.PlaylistBrowser.GetInsertIndex().ConfigureAwait(false);
await this.AddPlaylistItems().ConfigureAwait(false);
await this.ShiftItems(QueryOperator.GreaterOrEqual, this.Sequence, this.Offset).ConfigureAwait(false);
await this.AddOrUpdateMetaData().ConfigureAwait(false);
await this.SetPlaylistItemsStatus(PlaylistItemStatus.None).ConfigureAwait(false);
}))
{
await task.Run().ConfigureAwait(false);
}
}
finally
{
//Ignoring result on purpose.
BassCd.Release(this.Drive);
}
await this.SignalEmitter.Send(new Signal(this, CommonSignals.PlaylistUpdated)).ConfigureAwait(false);
}
public SingletonReentrantTaskContainer(string id, SingletonReentrantTask instance) : this()
{
this.Id = id;
this.Instances = new HashSet <SingletonReentrantTask>(new[] { instance });
}