public static ValueTask <(IEntryState <TId, TData> entry, T result)> UpdateEntryAsync <TId, TData, T>(this IEntryStateStorage <TId, TData> entryStorage,
IEntryState <TId, TData> entry,
Func <IEntryState <TId, TData>, (IEntryState <TId, TData> entry, T result)> update,
public static async ValueTask <IEntryState <TId, TData> > UpdateEntryAsync <TId, TData>(this IEntryStateStorage <TId, TData> entryStorage,
IEntryState <TId, TData> entry,
Func <IEntryState <TId, TData>, IEntryState <TId, TData> > update,
Func <IEntryState <TId, TData>, bool> condition,
CancellationToken cancellation) where TData : class
{
if (entryStorage == null)
{
throw new ArgumentNullException(nameof(entryStorage));
}
if (entry == null)
{
throw new ArgumentNullException(nameof(entry));
}
if (update == null)
{
throw new ArgumentNullException(nameof(update));
}
if (condition == null)
{
throw new ArgumentNullException(nameof(condition));
}
var id = entry.Id;
while (condition(entry))
{
var desired = update(entry);
if (desired == entry)
{
return(entry);
}
if (await entryStorage.CompareExchangeAsync(desired, entry, cancellation))
{
return(entry = desired);
}
entry = await entryStorage.GetEntryAsync(id, cancellation);
if (entry == null)
{
return(null);
}
}
return(entry);
}
public static async ValueTask <IEntryState <TId, TData> > GetEntryAsync <TId, TData>(this IEntryStateStorage <TId, TData> entryStorage,
IEntryState <TId, TData> comparand,
CancellationToken cancellation = default)
where TData : class
{
if (entryStorage == null)
{
throw new ArgumentNullException(nameof(entryStorage));
}
if (comparand == null)
{
throw new ArgumentNullException(nameof(comparand));
}
var entries = await entryStorage.GetEntriesAsync(DataPropertyHelper.BuildPredicate(comparand), cancellation);
return(entries.FirstOrDefault());
}
public static ValueTask <IEntryState <TId, TData> > UpdateEntryAsync <TId, TData>(this IEntryStateStorage <TId, TData> entryStorage,
IEntryState <TId, TData> entry,
Func <IEntryState <TId, TData>, IEntryState <TId, TData> > update,
CancellationToken cancellation) where TData : class
{
return(UpdateEntryAsync(entryStorage, entry, update, condition: e => true, cancellation));
}
public static async ValueTask <IEntryState <TId, TData> > GetEntryAsync <TId, TData>(this IEntryStateStorage <TId, TData> entryStorage,
Expression <Func <IEntryState <TId, TData>, bool> > predicate,
CancellationToken cancellation = default)
where TData : class
{
if (entryStorage == null)
{
throw new ArgumentNullException(nameof(entryStorage));
}
if (predicate == null)
{
throw new ArgumentNullException(nameof(predicate));
}
var entries = await entryStorage.GetEntriesAsync(predicate, cancellation);
return(entries.FirstOrDefault());
}
