/// <summary>
/// Параллельная обработка перечисления на разных сессиях.
/// </summary>
/// <typeparam name="TSrc">Тип данных.</typeparam>
/// <typeparam name="T">Тип результата.</typeparam>
/// <param name="src">Перечисление.</param>
/// <param name="parallelFunc">Функция обоработки.</param>
/// <returns>Результат.</returns>
protected async ValueTask <T[]> ParallelizeOnSessions <TSrc, T>(IEnumerable <TSrc> src, Func <IEsentSession, TSrc, T> parallelFunc)
{
ValueTask <T> Do(IEsentSession session, TSrc el)
{
return(session.Run(() => parallelFunc(session, el)));
}
if (src == null)
{
throw new ArgumentNullException(nameof(src));
}
if (parallelFunc == null)
{
throw new ArgumentNullException(nameof(parallelFunc));
}
var tasks = new List <ValueTask <T> >();
var toDispose = new CompositeDisposable(null);
try
{
foreach (var el in src)
{
var session = await EsentProvider.GetSecondarySessionAndUse();
toDispose.AddDisposable(session.usage);
tasks.Add(Do(session.session, el));
}
return(await CoreTaskHelper.WhenAllValueTasks(tasks));
}
finally
{
toDispose.Dispose();
}
}
private async Task <IList <IBoardPostEntity> > LoadEntities(IList <PostStoreEntityId> ids, PostStoreLoadMode mode)
{
ValueTask <List <IBoardPostEntity> > DoLoad(IList <PostStoreEntityId> toLoad)
{
return(OpenSession(session =>
{
var result = new List <IBoardPostEntity>();
var loadContext = CreateLoadContext(session, true, true);
var loadContextToDispose = loadContext;
using (loadContextToDispose)
{
foreach (var id in toLoad)
{
Api.MakeKey(loadContext.table.Session, loadContext.table, id.Id, MakeKeyGrbit.NewKey);
if (Api.TrySeek(loadContext.table.Session, loadContext.table, SeekGrbit.SeekEQ))
{
var r = LoadBoardEntity(session, ref loadContext, mode);
result.Add(r);
}
}
}
return result;
}));
}
if (ids == null)
{
throw new ArgumentNullException(nameof(ids));
}
mode = mode ?? DefaultLoadMode;
IList <IBoardPostEntity> loaded;
if (ids.Count > 4)
{
var toLoad = ids.DistributeToProcess(3);
var tasks = toLoad.Select(DoLoad).ToArray();
var taskResults = await CoreTaskHelper.WhenAllValueTasks(tasks);
loaded = taskResults.SelectMany(r => r).ToList();
}
else
{
loaded = await DoLoad(ids);
}
if (mode.EntityLoadMode == PostStoreEntityLoadMode.Full)
{
await FillChildrenInLoadResult(loaded);
}
return(loaded);
}
private async ValueTask <Nothing> SetChildren(IBoardPostEntity entity)
{
if (entity == null)
{
return(Nothing.Value);
}
ValueTask <List <IBoardPostEntity> > DoLoad(IList <(PostStoreEntityId id, int counter)> toLoad)
{
return(OpenSession(session =>
{
var result = new List <IBoardPostEntity>();
var loadContext = CreateLoadContext(session, true, true);
var loadContextToDispose = loadContext;
using (loadContextToDispose)
{
foreach (var id in toLoad)
{
Api.MakeKey(loadContext.table.Session, loadContext.table, id.id.Id, MakeKeyGrbit.NewKey);
if (Api.TrySeek(loadContext.table.Session, loadContext.table, SeekGrbit.SeekEQ))
{
var r = LoadBoardEntity(session, ref loadContext, FullLoadMode);
if (r is IBoardPostLight l)
{
l.Counter = id.counter;
}
result.Add(r);
}
}
}
return result;
}));
}
var collection = entity as IBoardPostCollection;
var threadCollection = entity as IBoardPageThreadCollection;
if ((entity.EntityType == PostStoreEntityType.Thread || entity.EntityType == PostStoreEntityType.ThreadPreview || entity.EntityType == PostStoreEntityType.Catalog || entity.EntityType == PostStoreEntityType.BoardPage) &&
entity is IPostModelStoreChildrenLoadStageInfo loadStage && (collection?.Posts != null || threadCollection?.Threads != null) &&
entity.StoreId != null)
{
if (loadStage.Stage == ChildrenLoadStageId.Completed)
{
var childrenIds = await OpenSession(session0 => EnumEntityChildren(session0, entity.StoreId.Value));
IList <IBoardPostEntity> loaded;
if (childrenIds.Count > 4)
{
var toLoad = childrenIds.DistributeToProcess(3);
var tasks = toLoad.Select(DoLoad).ToArray();
var taskResults = await CoreTaskHelper.WhenAllValueTasks(tasks);
loaded = taskResults.SelectMany(r => r).ToList();
}
else
{
loaded = await DoLoad(childrenIds);
}
if (collection?.Posts != null)
{
IEnumerable <IBoardPost> toAdd;
if (entity.EntityType == PostStoreEntityType.Catalog)
{
int GetCatalogSequence(IBoardPost p)
{
if (p is IBoardPostEntityWithSequence s)
{
return(s.OnPageSequence);
}
return(int.MaxValue);
}
toAdd = loaded.OfType <IBoardPost>().Deduplicate(p => p.Link, BoardLinkEqualityComparer.Instance).OrderBy(GetCatalogSequence);
}
else
{
toAdd = loaded.OfType <IBoardPost>().Deduplicate(p => p.Link, BoardLinkEqualityComparer.Instance).OrderBy(p => p.Link, BoardLinkComparer.Instance);
}
foreach (var item in toAdd)
{
collection.Posts.Add(item);
}
}
if (threadCollection?.Threads != null)
{
var toAdd = loaded.OfType <IThreadPreviewPostCollection>().Deduplicate(p => p.Link, BoardLinkEqualityComparer.Instance).OrderBy(p => p.OnPageSequence);
foreach (var item in toAdd)
{
threadCollection.Threads.Add(item);
}
}
}
}
return(Nothing.Value);
}